ORCID Profile
0000-0003-1197-6343
Current Organisation
University of New South Wales
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Structural Chemistry and Spectroscopy | Solid State Chemistry | Inorganic Chemistry | Functional Materials | Physical Chemistry (Incl. Structural) | Functional materials | Electrochemistry | Materials Engineering | Electronic and magnetic properties of condensed matter; superconductivity | Renewable Power and Energy Systems Engineering (excl. Solar Cells) | Bioinorganic chemistry | Inorganic materials (incl. nanomaterials) | Condensed matter physics | Transition Metal Chemistry | Environmental Technologies | Environmental Engineering | Inorganic chemistry | Condensed matter characterisation technique development | Chemical engineering | Energy Generation, Conversion and Storage Engineering | Composite and Hybrid Materials | Electronic and Magnetic Properties of Condensed Matter; Superconductivity | Solid state chemistry | Electrochemical energy storage and conversion
ANZSRC Socio-Economic Objective (SEO)
Energy Storage (excl. Hydrogen) | Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in Engineering | Ceramics | Expanding Knowledge in Technology | Expanding Knowledge in the Physical Sciences |
Related Links
Publications
Sodium-ion battery anodes from carbon depositions
Publisher: Elsevier BV
Date: 05-2021
Exploring the rate dependence of phase evolution in P2-type Na2/3Mn0.8Fe0.1Ti0.1O2
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA01366K
Abstract: P2-type Na 2/3 Mn 0.8 Fe 0.1 Ti 0.1 O 2 , a promising high-performance electrode material for use in ambient temperature sodium-ion batteries, is examined using operando and long-term in situ synchrotron X-ray diffraction studies to reveal the structural evolution during battery function.
A simple electrochemical cell for in-situ fundamental structural analysis using synchrotron X-ray powder diffraction
Publisher: Elsevier BV
Date: 12-2013
Lithium migration in Li4 Ti5 O12 studied using in situ neutron powder diffraction
Publisher: American Chemical Society (ACS)
Date: 25-03-2014
DOI: 10.1021/CM5002779
An Operando Mechanistic Evaluation of a Solar-Rechargeable Sodium-Ion Intercalation Battery
Publisher: Wiley
Date: 03-07-2017
Oxygen Nucleation of MoS2 Nanosheet Thin Film Supercapacitor Electrodes for Enhanced Electrochemical Energy Storage
Publisher: Wiley
Date: 14-06-2021
Abstract: A direct thin film approach to fabricate large‐surface MoS 2 nanosheet thin film supercapacitors using the solution‐based diffusion of thiourea into an anodized MoO 3 thin film was investigated. A dense MoS 2 nanosheet thin film electrode (D‐MoS 2 ) was obtained when the anodized MoO 3 thin film was processed in a low thiourea solution concentration, whereas a highly porous MoS 2 nanosheet thin film electrode (P‐MoS 2 ) was formed at a higher thiourea solution concentration. The charge storage performances of the D‐MoS 2 and P‐MoS 2 thin films displayed an unusual increase in capacitance on extended cycling, leading to a capacitance as high as around 5–8 mF cm −2 . X‐ray diffraction and cross‐sectional microscopy revealed the capacitance enhancements of the MoS 2 supercapacitors are attributable to the nucleation of a new MoS 2‐ x O x phase upon cycling. For the D‐MoS 2 nanosheet thin film, the formation and growth of the MoS 2‐ x O x phase during cycling was accompanied by a volumetric expansion of the MoS 2 layer. For the P‐MoS 2 thin film, the nucleation and growth of the MoS 2‐ x O x phase occurred in the pores of the MoS 2 layer. The propagation of the MoS 2‐ x O x phase also shifted the charge storage process in both films from a diffusion‐limited process to a capacitive‐dominant process.
Anhydrous Calcium Oxalate Polymorphism: A Combined Computational and Synchrotron X-ray Diffraction Study
Publisher: American Chemical Society (ACS)
Date: 15-09-2016
Activated Carbon from E-Waste Plastics as a Promising Anode for Sodium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 14-05-2019
Monitoring lead-acid battery function using operando neutron radiography
Publisher: Elsevier BV
Date: 10-2019
The phase evolution of tetradymite-type bismuth selenide in alkali ion batteries
Publisher: Elsevier BV
Date: 08-2021
Strategies for the Analysis of Graphite Electrode Function
Publisher: Wiley
Date: 06-11-2021
Abstract: Since the commercialization of lithium‐ion batteries, graphite has been the uncontested material of choice as the negative electrode host structure, and it has therefore been pivotal for their ubiquitous adoption and implementation. Despite extensive research efforts dedicated to discovering and developing alternative anode material candidates, no commercially viable successor has so‐far been identified. Simultaneously, the understanding of graphite electrode function is continuously expanding, and new strategies for rationally improving performance are being explored. Here, the key challenges lie in examining the graphitic material, not only in the pure as‐prepared state, but also when formed into an electrode and during electrochemical cycling, i.e., in situ/operando. A multiscale approach is necessary to accurately relate the (de)lithiation/(de)intercalation mechanisms involved to the observed performance. The present review summarizes conventional techniques and highlights recent advances in the analytical methods used for the characterization of graphite‐based electrode structure and function. The discussion is based on ex les from key recent work using innovative analytical strategies to obtain novel insight into the evolution in structure, microstructure, electronic structure, surface chemistry/composition, etc. The deeper understanding of material function gained from these innovative approaches may hold the key for the rational design of next‐generation graphite‐based or ‐inspired electrodes.
Introducing a 0.2 V sodium-ion battery anode: The Na2Ti3O7 to Na3−xTi3O7 pathway
Publisher: Elsevier BV
Date: 12-2015
Pyrolysed coffee grounds as a conductive host agent for sulfur composite electrodes in Li–S batteries
Publisher: Elsevier BV
Date: 07-2021
The NaxMoO2 Phase Diagram (1/2 ≤ x < 1): An Electrochemical Devil’s Staircase
Publisher: American Chemical Society (ACS)
Date: 17-08-2017
X-ray and neutron diffraction studies of flux and hydrothermally grown nonlinear optical material KBe 2 BO 3 F 2
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CE25828E
Crystal chemistry of the Pmnb polymorph of Li2MnSiO4
Publisher: Elsevier BV
Date: 04-2012
Dual Polymer/Liquid Electrolyte with BaTiO3 Electrode for Magnesium Batteries
Publisher: American Chemical Society (ACS)
Date: 29-04-2020
Investigating low-valent compositions in the Na3V2O2x(PO4)2F3−2x family: structural transitions and their consequences
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8DT00086G
Abstract: A member of the family of compounds with a formula Na 3 V 2 O 2x (PO 4 ) 2 F 3−2x is synthesized by carbothermal reduction and 2 consecutive hydrothermal processes.
The Unique Structural Evolution of the O3-Phase Na2/3Fe2/3Mn1/3O2 during High Rate Charge/Discharge: A Sodium-Centred Perspective
Publisher: Wiley
Date: 06-07-2015
Comparison of the so-called CGR and NCR cathodes in commercial lithium-ion batteries using in situ neutron powder diffraction
Publisher: Cambridge University Press (CUP)
Date: 12-2014
DOI: 10.1017/S088571561400102X
Abstract: The evolution of the 003 reflection of the layered Li(Ni,Co,Mn)O 2 (CGR) and Li(Ni,Co,Al)O 2 (NCR) cathodes in commercial 18650 lithium-ion batteries during charge/discharge were determined using in situ neutron powder diffraction. The 003 reflection is chosen as it is the stacking axis of the layered structure and shows the largest change during charge/discharge. The comparison between these two cathodes shows that the NCR cathode exhibits an unusual contraction near the charged state and during the potentiostatic step, where the potentiostatic step is recommended by the manufacturer. This feature is not shown to the same degree by the CGR cathode. The behavior is likely related to the compositions of these cathodes, the amount of Li/Ni site mixing and the presence of Al or Mn.
In operando neutron diffraction study of the temperature and current rate-dependent phase evolution of LiFePO4 in a commercial battery
Publisher: Elsevier BV
Date: 02-2017
Rate and Composition Dependence on the Structural–Electrochemical Relationships in P2–Na2/3Fe1–yMnyO2 Positive Electrodes for Sodium-Ion Batte
Publisher: American Chemical Society (ACS)
Date: 02-10-2018
High voltage structural evolution and enhanced Na-ion diffusion in P2-Na2/3Ni1/3−xMgxMn2/3O2 (0 ≤ x ≤ 0.2) cathodes from diffraction, elec
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7EE02995K
Abstract: A detailed investigation on the effects of Mg substitution (0 ≤ x ≤ 0.2) in high voltage P2-Na 2/3 Ni 1/3−x Mg x Mn 2/3 O 2 cathode materials for Na-ion batteries.
Mechanisms of Sodium Insertion/Extraction on the Surface of Defective Graphenes
Publisher: American Chemical Society (ACS)
Date: 28-12-2016
Abstract: Two chemically synthesized defective graphene materials with distinctly contrasting extended structures and surface chemistry are used to prepare sodium-ion battery electrodes. The difference in electrode performance between the chemically prepared graphene materials is qualified based on correlations with intrinsic structural and chemical dissimilarities. The overall effects of the materials' physical and chemical discrepancies are quantified by measuring the electrode capacities after repeated charge/discharge cycles. Solvothermal synthesized graphene (STSG) electrodes produce capacities of 92 mAh/g in sodium-ion batteries after 50 cycles at 10 mA/g, while thermally exfoliated graphite oxide (TEGO) electrodes produce capacities of 248 mAh/g after 50 cycles at 100 mA/g. Solid-state
Operando and in Situ Diffraction Investigation of Lithium-Ion Batteries: What Have We Learnt over the Years and Where Are We Heading?
Publisher: The Electrochemical Society
Date: 09-2017
Abstract: A large proportion of the function of batteries arises from the electrodes, and these are in turn mediated by the atomic-scale perturbations or changes in the crystal structure during an electrochemical process (e.g. battery use). A range of researchers have applied operando and in situ diffraction to probe electrode crystal structure evolution during electrochemical processes inside fully functioning batteries. This allows the direct correlation of structural, electrochemical and external parameters, e.g. atomic site occupancies, applied current and temperature, which provides a relatively holistic picture of electrode function. This talk is ided into two parts, the first delving into the history of operando / in situ diffraction based techniques used to study lithium-ion batteries, encompassing X-ray, neutron and electron diffraction. I will highlight selected developments, recent breakthroughs, and key considerations required for carrying out these studies, including but not limited to cell design and choice of instrument. The second part of the talk will showcase our recent work in this space, trying to push the boundaries of these experiments. Here we are exploring aspects such as battery types with a range of form factors, i.e. , thin-film to large format, the influence of temperature whilst performing in situ experiments, long term in situ experiments and particularly pertinent to applications the high-current rate behaviour of electrodes and their relationship to structural evolution or stability. The presentation will provide a critical snapshot of how operando and in situ diffraction methods ar contributing to the development of lithium-ion batteries.
Crystal Structures and Phase Transitions in A-Site Deficient Perovskites Ln1/3TaO3
Publisher: American Chemical Society (ACS)
Date: 15-10-2008
DOI: 10.1021/CM8014868
Electrochemical performance and structure of Al2 W3-: X Mox O12
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CE01707C
Abstract: Al 2 W 3−x Mo x O 12 shows an orthorhombic to monoclinic transition with increasing Mo concentration and ∼100 mA h g −1 capacity at 100 cycles in Li-cells.
Structure of the Naphthalene Dimer from Rare Gas Tagging
Publisher: American Chemical Society (ACS)
Date: 21-04-2007
DOI: 10.1021/JP0687504
Abstract: Excitation spectra of naphthalene dimer-argonn (n = 1-3) clusters are obtained by resonance enhanced multiphoton ionization time-of-flight mass spectroscopy. The spectra are generally independent of the number of attached argon atoms and reveal sharp structures which are fitted by superimposing independent monomer spectra. It is concluded that the rare-gas tagging technique reveals the presence of a T-shaped naphthalene dimer chromophore in the molecular beam.
Structural evidence for Mg-doped LiFePO4 electrode polarisation in commercial Li-ion batteries
Publisher: Elsevier BV
Date: 08-2018
Expanding the applications of the ilmenite mineral to the preparation of nanostructures: TiO2 nanorods and their photocatalytic properties in the degradation of oxalic acid
Publisher: Wiley
Date: 23-11-2013
Abstract: The mineral ilmenite is one of the most abundant ores in the Earth's crust and it is the main source for the industrial production of bulk titanium oxide. At the same time, methods to convert ilmenite into nanostructures of TiO(2) (which are required for new advanced applications, such as solar cells, batteries, and photocatalysts) have not been explored to any significant extent. Herein, we describe a simple and effective method for the preparation of rutile TiO(2) nanorods from ball-milled ilmenite. These nanorods have small dimensions (width: 5-20 nm, length: 50-100 nm, thickness: 2-5 nm) and possess large specific surface areas (up to 97 m(2) g(-1)). Dissolution/hydrolysis recipitation is proposed as a growth mechanism. The nanorods were found to have attractive photocatalytic properties in the degradation of oxalic acid. Their photocatalytic activity is close to that of the benchmark Degussa P25 material and better than that of a commercial high-surface-area rutile powder.
Enhancing the Electrochemical Properties of Nickel-Rich Cathode by Surface Coating with Defect-Rich Strontium Titanate
Publisher: American Chemical Society (ACS)
Date: 06-06-2023
Crystallographic Evolution of P2 Na2/3Fe0.4Mn0.6O2 Electrodes during Electrochemical Cycling
Publisher: American Chemical Society (ACS)
Date: 30-08-2016
Size and Composition Effects in Sb-Carbon Nanocomposites for Sodium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 31-10-2016
Abstract: Sodium-ion batteries are in the spotlight as viable alternatives to lithium-ion batteries in stationary storage and power grid applications. Among possible anode materials, Sb is one of the interesting candidates due to a combination of battery-type potential plateaus in the charge-discharge profiles, high capacity (theoretical capacity of 660 mAh g
Moisture exposed layered oxide electrodes as Na-ion battery cathodes
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA07950D
Abstract: Mn-rich layered oxides of P2 Na 2/3 Mn 0.8 Fe 0.1 Ti 0.1 O 2 have been shown to exhibit a remarkably stable electrochemical performance even after exposure to moisture for extended periods of time.
Structural evolution of mixed valent (V3+/V4+) and V4+ sodium vanadium fluorophosphates as cathodes in sodium-ion batteries: comparisons, overcharging and mid-term cyc
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA03780H
Abstract: The carbon-coated V 3.8+ shows more tolerance to overcharging relative to V 4+ and both s les reduce in particle size during overcharging.
Pulsed Laser Deposition‐based Thin Film Microbatteries
Publisher: Wiley
Date: 18-05-2020
TiO2 nanoparticles synthesized by the molten salt method as a dual functional material for dye-sensitized solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2RA00041E
In-situ Neutron Diffraction Study of a High Voltage Li(Ni0.42 Mn0.42 Co0.16 )O2 /Graphite Pouch Cell
Publisher: Elsevier BV
Date: 10-2015
Iron-Doped Sodium–Vanadium Fluorophosphates: Na3V2–yO2–yFey(PO4)2F1+y (y < 0.3)
Publisher: American Chemical Society (ACS)
Date: 16-12-2019
DOI: 10.1021/ACS.INORGCHEM.9B03111
Abstract: The sodium-vanadium fluorophosphate family has been actively investigated recently, but few ex les tackle chemical doping or the substitution of vanadium. This work presents a series of iron-doped compounds Na
Small angle neutron scattering and its application in battery systems
Publisher: Elsevier BV
Date: 08-2022
Lithium Sulfur Batteries with Modified Electrolytes Containing Ionic Liquids
Publisher: The Electrochemical Society
Date: 02-2019
Abstract: Lithium-sulfur (Li-S) batteries are a promising technology to reach a target of 500-700 Wh kg -1 as a replacement for current commercial Li-ion batteries in a number of sectors. They also offer lower environmental impact with reduced costs for the cathode materials. However, the level of currently achievable performance is still below expectations. This is due to a lack of understanding of the fundamental electrochemical processes and mitigating the undesired reactions during Li-S battery cycling. In particular the so-called redox shuttle effect, which arises from the solubility of polysulfides (PSs, Li 2 S x ) species, and their potential to reduce capacity retention of the battery. Modifying electrolytes with additives and new solvents change the solubility of these intermediates and potentially improve the cycling performance of the battery. Herein, the effects of using LiNO 3 as an additive as well as C 4 mpyr-based ionic liquid electrolyte on the performance of Li-S cells are analysed using electrochemical, in situ X-ray powder diffraction (XRD) and ex situ soft X-ray absorption spectroscopy (sXAS) techniques. Whilst both LiNO 3 and C 4 mpyr-based IL participate in forming a protective stable SEI layer on the lithium anode, our studies have provided further evidence for the suppression of Li 2 S deposition on the electrodes when using LiNO 3 salt as an additive in the electrolyte, leading to higher capacity and better capacity retention compared to the additive-free electrolyte. In addition, based on XRD data, different species of Li 2 S x were detected during cycling of cells with organic and IL-based electrolytes, which indicates that different (electro)chemical reactions occur in these environments. Overall, cells with electrolytes containing ionic liquids and LiNO 3 showed more stable cycling.
High performance P2 sodium layered oxides: an in-depth study into the effect of rationally selected stoichiometry
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA07346A
Abstract: Based on our rational approach to stoichiometric selection, we present two high performance Na-ion cathode materials: P2-Na 2/3 Mn 0.9−x Ni x Ti 0.05 Fe 0.05 O 2 ( x = 0.10 and 0.20).
Enhanced electrochemical properties of LiFePO4 by Mo-substitution and graphitic carbon-coating via a facile and fast microwave-assisted solid-state reaction
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CP24062A
Abstract: A composite cathode material for lithium ion battery applications, Mo-doped LiFePO(4)/C, is obtained through a facile and fast microwave-assisted synthesis method. Rietveld analysis of LiFePO(4)-based structural models using synchrotron X-ray diffraction data shows that Mo-ions substitute onto the Fe sites and displace Fe-ions to the Li sites. Supervalent Mo(6+) doping can act to introduce Li ion vacancies due to the charge compensation effect and therefore facilitate lithium ion diffusion during charging/discharging. Transmission electron microscope images demonstrate that the pure and doped LiFePO(4) nanoparticles were uniformly covered by an approximately 5 nm thin layer of graphitic carbon. Amorphous carbon on the graphitic carbon-coated pure and doped LiFePO(4) particles forms a three-dimensional (3D) conductive carbon network, effectively improving the conductivity of these materials. The combined effects of Mo-doping and the 3D carbon network dramatically enhance the electrochemical performance of these LiFePO(4) cathodes. In particular, Mo-doped LiFePO(4)/C delivers a reversible capacity of 162 mA h g(-1) at a current of 0.5 C and shows enhanced capacity retention compared to that of undoped LiFePO(4)/C. Moreover, the electrode exhibits excellent rate capability, with an associated high discharge capacity and good electrochemical reversibility.
Structure–Electrochemical Evolution of a Mn-Rich P2 Na2/3Fe0.2Mn0.8O2 Na-Ion Battery Cathode
Publisher: American Chemical Society (ACS)
Date: 15-08-2017
Structures, Phase Transitions, Hydration, and Ionic Conductivity of Ba4Nb2O9
Publisher: American Chemical Society (ACS)
Date: 05-08-2009
DOI: 10.1021/CM901644E
Structural changes in a commercial lithium-ion battery during electrochemical cycling: An in situ neutron diffraction study
Publisher: Elsevier BV
Date: 15-12-2010
Preparation and electrochemical properties of high-capacity LiFePO 4 -Li3 V2 (PO4 )3 /C composite for lithium-ion batteries
Publisher: Elsevier BV
Date: 2014
Structure of the Li4 Ti5 O12 anode during charge-discharge cycling
Publisher: Cambridge University Press (CUP)
Date: 10-11-2014
DOI: 10.1017/S0885715614001067
Abstract: The structural evolution of the “zero-strain” Li 4 Ti 5 O 12 anode within a functioning Li-ion battery during charge–discharge cycling was studied using in situ neutron powder-diffraction, allowing correlation of the anode structure to the measured charge–discharge profile. While the overall lattice response controls the “zero-strain” property, the oxygen atom is the only variable in the atomic structure and responds to the oxidation state of the titanium, resulting in distortion of the TiO 6 octahedron and contributing to the anode's stability upon lithiation/delithiation. Interestingly, the trend of the octahedral distortion on charge–discharge does not reflect that of the lattice parameter, with the latter thought to be influenced by the interplay of lithium location and quantity. Here we report the details of the TiO 6 octahedral distortion in terms of the O–Ti–O bond angle that ranges from 83.7(3)° to 85.4(5)°.
Influence of Growth Parameters on the Electrochemical Performance of Electrodeposited Carbons
Publisher: MDPI AG
Date: 29-07-2022
Abstract: Generating useful chemicals from CO2 is driving research into carbon capture and utilization. In this work, hard carbons are electrodeposited on various substrates from molten carbonate melts in CO2 atmospheres. These electrodeposited carbons are subsequently used as anodes in sodium-ion batteries, with preliminary investigations into their performance in potassium-ion batteries. The hard carbons were characterized using X-ray diffraction (XRD) and Raman spectroscopy. Hard carbons grown on graphite substrates produced initial reversible capacities of 405 ± 29 mAh/g and capacity retention of 85.2 ± 1.1% after 50 cycles when cycled at 10 mA/g which are amongst the highest capacities reported for hard carbons to date. This work clearly illustrates that the carbons generated via CO2 mediated electrodeposition are suitable for application in next generation batteries.
Electrochemically activated solid synthesis: an alternative solid-state synthetic method
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8DT02946F
Abstract: Electrochemical discharge followed by thermal treatments leads to the generation of unconventional phases upon heating, an alternative synthetic route.
Unexpectedly Large Contribution of Oxygen to Charge Compensation Triggered by Structural Disordering: Detailed Experimental and Theoretical Study on a Li3NbO4–NiO Binary System
Publisher: American Chemical Society (ACS)
Date: 23-05-2022
Cover Feature: Oxygen Nucleation of MoS2 Nanosheet Thin Film Supercapacitor Electrodes for Enhanced Electrochemical Energy Storage (ChemSusChem 14/2021)
Publisher: Wiley
Date: 02-07-2021
Controlling Spin Switching with Anionic Supramolecular Frameworks
Publisher: American Chemical Society (ACS)
Date: 04-03-2020
A new approach to turbostratic carbon production via thermal salt-assisted treatment of graphite
Publisher: Elsevier BV
Date: 09-2023
Electrochemical Modification of Negative Thermal Expansion Materials in the TaxNb1–xVO5 Series
Publisher: American Chemical Society (ACS)
Date: 22-08-2018
DOI: 10.1021/ACS.INORGCHEM.8B01280
Abstract: Electrochemical processes transfer charge carriers to and from electrodes, e.g., Li
Structural evolution of NASICON-type Li1+xAlxGe2−x(PO4)3 using in situ synchrotron X-ray powder diffraction
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA00402D
Abstract: In situ synchrotron X-ray diffraction study of the synthesis of solid-electrolyte Li 1+x Al x Ge 2−x (PO 4 ) 3 (LAGP) from the precursor glass reveals that an initially crystallized dopant poor phase transforms into the Al-doped LAGP at 800 °C.
Decorated and Modified Graphenes as Electrodes in Na and Li-Ion Batteries
Publisher: Springer International Publishing
Date: 2017
Capacity Enhancement of the Quenched Li-Ni-Mn-Co Oxide High-voltage Li-ion Battery Positive Electrode
Publisher: Elsevier BV
Date: 05-2017
In situ synthesis of Cu( ii ) dicarboxylate metal organic frameworks (MOFs) and their application as battery materials
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3CP00029J
Abstract: This work illustrates how the copper substrate for anodes in lithium-ion batteries are used to make copper-carboxylates via reactions with dicarboxylic acids. The resulting electrode performance can be tuned by controlling the reaction conditions.
Crystal structures of orthorhombic, hexagonal, and cubic compounds of the Sm(x) Yb(2-x) TiO5 series
Publisher: Elsevier BV
Date: 05-2014
P2-Na2/3Mn0.8M0.1M′0.1O2 (M = Zn, Fe and M′ = Cu, Al, Ti): A Detailed Crystal Structure Evolution Investigation
Publisher: American Chemical Society (ACS)
Date: 24-05-2021
Structural evolution of high energy density V3+/V4+ mixed valent Na3V2O2x(PO4)2F3−2x (x = 0.8) sodium van
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA00773E
Abstract: The first time-resolved in situ synchrotron XRD study of a cathode in a functioning sodium-ion battery. We determine the reaction mechanism, lattice parameters, sodium evolution, and the maximum sodium extraction for the fresh and precycled cell.
Na4Co3(PO4)2P2O7 through Correlative Operando X-ray Diffraction and Electrochemical Impedance Spectroscopy
Publisher: American Chemical Society (ACS)
Date: 27-06-2019
Investigation of low molecular weight sulfur–limonene polysulfide electrodes in Li–S cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2TA04162F
Abstract: Solid-state NMR methods revealed quantifiable impact on lithium shielding and molecular mobility when using limonene polysulfide copolymeric cathodes in Li–S batteries.
Structure of BiRe2 O6 re-investigated using single-crystal neutron Laue diffraction
Publisher: IOP Publishing
Date: 11-2010
Evaluation of undoped and M-doped TiO2, where M = Sn, Fe, Ni/Nb, Zr, V, and Mn, for lithium-ion battery applications prepared by the molten-salt method
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA00206K
Abstract: Bare and Fe, Zr, Sn, Mn, V and Ni/Nb doped TiO 2 prepared by the molten salt method, amongst these the Zr-doped s le exhibited a stable reversible capacity.
Giant magnetoelastic effect at the opening of a spin-gap in Ba 3 BiIr 2 O 9
Publisher: American Chemical Society (ACS)
Date: 06-02-2012
DOI: 10.1021/JA211517H
Graphene and Selected Derivatives as Negative Electrodes in Sodium‐ and Lithium‐Ion Batteries
Publisher: Wiley
Date: 04-02-2015
Effect of Post-synthesis Processing on the Electrochemical Performance of Y2W3O12
Publisher: American Chemical Society (ACS)
Date: 13-02-2023
Metal dicarboxylates as anode materials for Li-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3MA00286A
Abstract: Holistic investigations into the various mechanisms of battery electrodes are essential for the development of competitive and sustainable novel battery materials.
Sodium insertion/extraction from single-walled and multi-walled carbon nanotubes: The differences and similarities
Publisher: Elsevier BV
Date: 05-2016
Structural Evolution and High-Voltage Structural Stability of Li(NixMnyCoz)O2 Electrodes
Publisher: American Chemical Society (ACS)
Date: 17-12-2019
Probing the charged state of layered positive electrodes in sodium-ion batteries: reaction pathways, stability and opportunities
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA09553B
Abstract: The complex behaviour of layered oxide cathode materials at high voltages currently limits the energy densities which can be achieved by sodium-ion batteries.
In Situ Neutron Powder Diffraction of Li6C60 for Hydrogen Storage
Publisher: American Chemical Society (ACS)
Date: 19-08-2015
Electron microscopy and its role in advanced lithium-ion battery research
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9SE00038K
Abstract: Electron microscopy (EM), specifically in situ , is a powerful analytical and characterisation technique that is widely used to study electrode materials for battery applications.
Br-doped Li4 Ti5 O12 and composite TiO 2 anodes for Li-ion batteries: Synchrotron X-ray and in situ neutron diffraction studies
Publisher: Wiley
Date: 09-2011
Exploration of the high temperature phase evolution of electrochemically modified Sc2(WO4)3via potassium discharge
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9QI00699K
Abstract: Electrochemical discharge followed by thermal treatment produces K 2 WO 4 and other phases. K 2 WO 4 features a large negative thermal expansion coefficient between 923–1023 K.
Novel Electrode Materials By Modification Route of Negative Thermal Expansion Materials
Publisher: The Electrochemical Society
Date: 09-2017
Abstract: Until now and most likely for the next few decades, lithium-ion batteries (LIBs) are likely to remain as one of the best energy storage devices. However, the price of lithium metal is increasing dramatically and some safety issues have been reported, which leads research towards alternative battery chemistries like sodium-ion and potassium-ion batteries to potentially alleviate some of these issues. Unfortunately, due to the larger size of sodium and potassium ions compared with lithium ion, they typically require electrode materials with larger voids to allow reversible insertion. In this project, we illustrate how some negative thermal expansion (NTE) materials fit these requirements and thus may be a candidate electrode for next-generation batteries. At the same time, we find that cation insertion into the voids changes the properties of the NTE materials. Modified NTE materials that tend towards zero thermal expansion (ZTE) materials could have significant advantages in use for industrial applications, for ex le, in fibre optic systems and as packaging materials for refractive index gratings or in high-value engineering industries. So in this research, we have investigated a new electrode material for next-generation batteries and manipulated their properties for applications in other fields. Here we present the results on Sc 2-x Al x W 3-y Mo y O 12 as electrodes in Li, Na and K-ion batteries and the change in properties post ion-insertion.
Time-dependent in-situ neutron diffraction investigation of a Li(Co 0.16 Mn1.84 )O4 cathode
Publisher: American Chemical Society (ACS)
Date: 11-10-2011
DOI: 10.1021/JP2026237
On the dynamics of transition metal migration and its impact on the performance of layered oxides for sodium-ion batteries: NaFeO2as a case study
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA02473A
Abstract: Reversibility of transition metal migration in layered oxides as cathodes for sodium ion batteries at the expense of polarization increase.
Biomass Derived High Areal and Specific Capacity Hard Carbon Anodes for Sodium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 04-01-2021
Application of Operando Methods for Characterisation of Structural Evolution in Electrochemical Systems
Publisher: The Electrochemical Society
Date: 09-2017
Abstract: Energy storage has in recent times become a critical area of research due to the widespread adoption of portable electronic devices, and the need to derive more energy from sources other than fossil fuels. Alternative, renewable energy sources such as wind or solar are only able to produce power intermittently and thus the development of large-scale energy storage systems and the associated infrastructure to deliver a constant supply of energy will be key to a successful transition away from fossil fuels.[1, 2] Lithium-ion batteries (LIBs) appear ubiquitously in a variety of electronic devices where it is favoured for its high energy density and dependable cycling characteristics. Although recent work has also shown the viability of other battery systems, e.g. Na-ion, K-ion, Li-air, the number of publications regarding lithium-ion battery systems continues to outnumber any other battery chemistry,[3] which highlights that the LIB system is still an area with room for further innovation despite it being a well-established technology. In commercial LIBs, graphite has remained the negative electrode material of choice since first generation LIBs, where graphite was coupled with a LiCoO 2 positive electrode. Second generation systems involving LiFePO 4 (LFP) positive electrodes were later developed, and more recently third generation systems which utilise Li(Ni x Mn y Co z )O 2 or Li(Ni x Co y Al z )O 2 positive electrodes are beginning to be deployed in commercially produced LIBs.[4, 5] These systems have been optimised by their commercial vendors for electrochemical performance and production, however there is significant room for further investigation in regards to how these materials evolve and perform in devices, especially under different conditions or extreme conditions. Ex situ data and recent in situ work undertaken by our group has provided some insight,[6-9] however many open questions about battery performance and its relation to electrode materials remain unanswered. For ex le: phase evolution as a function of current rate, temperature, and transition metal composition (i.e., Ni:Co:Mn ratio), overcharging/undercharging and the structural consequences, or the influence of nano-sizing to phase evolution and its relationship to applied current. It is therefore important to characterise these systems thoroughly in order to find methods by which to improve their performance, e.g. optimal transition metal ratios and voltage cut-offs, and provide a foundation for the next-generation of LIBs which will be required to meet the growing demand for portable electronic devices. To answer the questions proposed above, we use in operando neutron diffraction to study fully-functioning, unmodified devices. Neutron diffraction is ideal for performing operando experiments as the neutron beam can easily penetrate the battery casing and components, and the high intensity allows for short collection times which provides data with excellent time resolution. By correlating the electrochemical data with the diffraction data we are able to establish relationships between the electrochemical state of the device and the structural evolution taking place. Here we present findings from recent studies of commercial LIBs with different cathode materials. We have investigated devices using LiFePO 4 , where we were able to establish a novel relationship between the structural kinetics of the electrode materials and the cycling history of the battery,[10] as well as devices using Li(Ni x Mn y Co z )O 2 with various Ni:Mn:Co ratios in order to compare their performance and structural stability at high voltage.[7] [1] H. Pan, Y.-S. Hu, L. Chen, Energy & Environmental Science, 6 (2013) 2338. [2] D. Lindley, Nature, 463 (2010) 18. [3] J.C. Pramudita, D. Sehrawat, D. Goonetilleke, N. Sharma, Advanced Energy Materials, (2017) 1-20. [4] M.S. Whittingham, Chemical Reviews, 104 (2004) 4271-4302. [5] J.W. Fergus, Journal of Power Sources, 195 (2010) 939-954. [6] J. Li, R. Petibon, S. Glazier, N. Sharma, W.K. Pang, V.K. Peterson, J.R. Dahn, Electrochimica Acta, 180 (2015) 234-240. [7] R. Petibon, J. Li, N. Sharma, W.K. Pang, V.K. Peterson, J.R. Dahn, Electrochimica Acta, 174 (2015) 417-423. [8] N. Sharma, W.K. Pang, Z. Guo, V.K. Peterson, ChemSusChem, 8 (2015) 2826-2853. [9] N. Sharma, V.K. Peterson, Journal of Solid State Electrochemistry, 16 (2012) 1849-1856. [10] D. Goonetilleke, J.C. Pramudita, M. Hagan, O.K. Al Bahri, W.K. Pang, V.K. Peterson, J. Groot, H. Berg, N. Sharma, Journal of Power Sources, 343 (2017) 446-457. Figure 1
In situ neutron powder diffraction studies of lithium-ion batteries
Publisher: Springer Science and Business Media LLC
Date: 26-10-2011
The Origin of Capacity Fade in the Li2MnO3·LiMO2 (M = Li, Ni, Co, Mn) Microsphere Positive Electrode: An Operando Neutron Diffraction and Transmis
Publisher: American Chemical Society (ACS)
Date: 06-07-2016
DOI: 10.1021/JACS.6B03932
Abstract: The mechanism of capacity fade of the Li2MnO3·LiMO2 (M = Li, Ni, Co, Mn) composite positive electrode within a full cell was investigated using a combination of operando neutron powder diffraction and transmission X-ray microscopy methods, enabling the phase, crystallographic, and morphological evolution of the material during electrochemical cycling to be understood. The electrode was shown to initially consist of 73(1) wt % R3̅m LiMO2 with the remaining 27(1) wt % C2/m Li2MnO3 likely existing as an intergrowth. Cracking in the Li2MnO3·LiMO2 electrode particle under operando microscopy observation was revealed to be initiated by the solid-solution reaction of the LiMO2 phase on charge to 4.55 V vs Li(+)/Li and intensified during further charge to 4.7 V vs Li(+)/Li during the concurrent two-phase reaction of the LiMO2 phase, involving the largest lattice change of any phase, and oxygen evolution from the Li2MnO3 phase. Notably, significant healing of the generated cracks in the Li2MnO3·LiMO2 electrode particle occurred during subsequent lithiation on discharge, with this rehealing being principally associated with the solid-solution reaction of the LiMO2 phase. This work reveals that while it is the reduction of lattice size of electrode phases during charge that results in cracking of the Li2MnO3·LiMO2 electrode particle, with the extent of cracking correlated to the magnitude of the size change, crack healing is possible in the reverse solid-solution reaction occurring during discharge. Importantly, it is the phase separation during the two-phase reaction of the LiMO2 phase that prevents the complete healing of the electrode particle, leading to pulverization over extended cycling. This work points to the minimization of behavior leading to phase separation, such as two-phase and oxygen evolution, as a key strategy in preventing capacity fade of the electrode.
Ionic Liquids - A Unique Palette to Create Advanced Electrolytes
Publisher: The Electrochemical Society
Date: 10-06-2016
Abstract: The drive to identify high energy batteries remains an on-going challenge. There are two key R & D thrusts at this time – next generation Lithium-ion batteries that (i) require the use of intercalation materials that can operate high voltages (5 V vs Li|Li + ) and (ii) alternative high energy density electrodes such as Sulfur (2567 Wh/kg) or the holy-grail for the field, an air breathing cathode (3505 Wh/kg). To harness these high energy densities Lithium metal anodes are required as one of very few alternatives. In both instances, there is a distinct need to develop electrolytes that are stable under strongly oxidising environments and strongly reductive environments, respectively. To this end, CSIRO has been actively researching ionic liquid electrolytes as an option to replace aprotic solvent based electrolytes in batteries. Ionic liquids have some unique properties in terms of negligible vapor pressure, relatively high conductivity, wide electrochemical windows and high thermal decomposition temperatures. This makes them ideally suited to a range of electrochemical storage devices, specifically those that are being targeted at this time. (i) High voltage lithium-ion batteries require electrolytes that are stable in contact with intercalation cathode at potentials 4.5 V (vs Li|Li + ) and do not cause Al current collector corrosion. To-date, there are very few materials that can achieve both of these goals. We will describe work we have been undertaking to determine failure modes of both active materials and electrode structures and the role of the electrolyte in solving these issues. (ii) Although a 10 fold increase in specific energy is possible with recent advances in Li-Sulfur (2567 Wh / kg) technologies, there are several challenges in the development of these devices. The most vexing of these challenges is the generation of lithium polysulfides which are highly prone to irreversibly move into the electrolyte media. These can have deleterious effects on the performance of the device such as reduced capacity and cycle-life. To overcome this problem, numerous different approaches have been trialled to “lock” S within a conductive structure / matrix whilst still making it available to lithium ions from the electrolyte to form the required lithium polysulfides that deliver the high capacity of the device. At CSIRO, we have been looking at a range of different methodologies to understand the formation of polysulfides both in the electrolyte and the cathode and then examine various methods to keep them electrically connected within the cathode. In this presentation, we will highlight our work methods to prevent polysulfide dissolution via changes to the electrolyte and the effect on cycling and in-situ studies at the Australian Synchrotron.
Discharge mechanism of the heat treated electrolytic manganese dioxide cathode in a primary Li/MnO2 battery: An in-situ and ex-situ synchrotron X-ray diffraction study
Publisher: Elsevier BV
Date: 07-2014
Structure and function of hard carbon negative electrodes for sodium-ion batteries
Publisher: IOP Publishing
Date: 16-09-2022
Abstract: Practical utilisation of renewable energy from intermittent sustainable sources such as solar and wind relies on safe, reliable, cost-effective, and high-capacity energy storage systems to be incorporated into the grid. Among the most promising technologies aimed towards this application are sodium-ion batteries(SIBs). Currently, hard carbon is the leading negative electrode material for SIBs given its relatively good electrochemical performance and low cost. Furthermore, hard carbon can be produced from a erse range of readily available waste and renewable biomass sources making this an ideal material for the circular economy. In facilitating future developments on the use of hard carbon-based electrode materials for SIBs, this review curates several analytical techniques that have been useful in providing structure-property insight and stresses the need for overall assessment to be based on a combination of complementary techniques. It also emphasises several key challenges in the characterisation of hard carbons and how various in situ and operando techniques can help unravel those challenges by providing us with a better understanding of these systems during operation thereby allowing us to design high-performance hard carbon materials for next-generation batteries.
High-Performance P2-Phase Na2/3Mn0.8Fe0.1Ti0.1O2 Cathode Material for Ambient-Temperature Sodium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 28-12-2015
The structural evolution of tetradymite-type Sb2Te3 in alkali ion batteries
Publisher: Elsevier BV
Date: 08-2021
Higher oxidation level in graphene oxide
Publisher: Elsevier BV
Date: 08-2017
YCa3(VO)3(BO3)4: A Kagomé Compound Based on Vanadium(III) with a Highly Frustrated Ground State
Publisher: American Chemical Society (ACS)
Date: 31-01-2011
DOI: 10.1021/CM1034003
The Sc2WxMo3−xO12 series as electrodes in alkali-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1CE00318F
Abstract: Herein, the series Sc 2 W x Mo 3−x O 12 (0 ≤ x ≤ 3) is synthesised and the structure and electrochemical performance in alkali-ion batteries is characterised.
Structure and crystal chemistry of fluorite-related Bi38Mo7O78 from single crystal X-ray diffraction and ab initio calculations
Publisher: Elsevier BV
Date: 06-2009
In-Situ Nanoindentation Measurement of Local Mechanical Behavior of a Li-Ion Battery Cathode in Liquid Electrolyte
Publisher: Springer Science and Business Media LLC
Date: 28-11-2018
Direct evidence of concurrent solid-solution and two-phase reactions and the nonequilibrium structural evolution of LiFePO 4
Publisher: American Chemical Society (ACS)
Date: 30-04-2012
DOI: 10.1021/JA301187U
Abstract: Lithium-ion batteries power many portable devices and in the future are likely to play a significant role in sustainable-energy systems for transportation and the electrical grid. LiFePO(4) is a candidate cathode material for second-generation lithium-ion batteries, bringing a high rate capability to this technology. LiFePO(4) functions as a cathode where delithiation occurs via either a solid-solution or a two-phase mechanism, the pathway taken being influenced by s le preparation and electrochemical conditions. The details of the delithiation pathway and the relationship between the two-phase and solid-solution reactions remain controversial. Here we report, using real-time in situ neutron powder diffraction, the simultaneous occurrence of solid-solution and two-phase reactions after deep discharge in nonequilibrium conditions. This work is an ex le of the experimental investigation of nonequilibrium states in a commercially available LiFePO(4) cathode and reveals the concurrent occurrence of and transition between the solid-solution and two-phase reactions.
Formation and conductivity studies of lithium argyrodite solid electrolytes using in-situ neutron diffraction
Publisher: Elsevier BV
Date: 2013
Novel structurally-stable Na-rich Na4V2O7 cathode material with high reversible capacity by utilization of anion redox activity
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0CC02816A
Abstract: A sodium-rich vanadium compound, Na 4 V 2 O 7 , is investigated as a cathode material for sodium-ion batteries, with a high reversible capacity of 194 mA h g −1 after activating to 4.7 V.
In Situ Studies of Li/Cu‐Doped Layered P2 NaxMnO2 Electrodes for Sodium‐Ion Batteries
Publisher: Wiley
Date: 12-06-2018
An Initial Review of the Status of Electrode Materials for Potassium‐Ion Batteries
Publisher: Wiley
Date: 12-05-2017
Use of Hydrothermal Carbonization to Improve the Performance of Biowaste‐Derived Hard Carbons in Sodium Ion‐Batteries
Publisher: Wiley
Date: 07-09-2023
Abstract: Over the last years, hard carbon (HC) has been the most promising anode material for sodium‐ion batteries due to its low voltage plateau, low cost and sustainability. In this study, three biomass wastes (spent coffee grounds, sunflower seed shells and rose stems) were investigated as potential materials for hard carbon preparation combining a two‐step method consisting on Hydrothermal Carbonization (HTC), to remove the inorganic impurities and increase the carbon content, and a subsequent pyrolysis process. The use of HTC as pretreatment prior to pyrolysis improves the specific capacity in all the materials compared to the ones directly pyrolyzed by more than 100% at high C‐rates. The obtained capacity ranging between 210 and 280 mAh g‐1 at C/15 is similar to the values reported in literature for biomass‐based hard carbons. Overall, HC obtained from sunflower seed shell performs better than that obtained from the other precursors with an Initial Coulombic Efficiency (ICE) of 76% and capacities of 120 mAh g‐1 during 1000 cycles at C with a high capacity retention of 86‐93%.
Graphene and magnesiated graphene as electrodes for magnesium ion batteries
Publisher: Elsevier BV
Date: 12-2018
Evidence of solid-solution reaction upon lithium insertion into cryptomelane K0.25 Mn2 O4 material
Publisher: American Chemical Society (ACS)
Date: 14-02-2014
DOI: 10.1021/JP411687N
Real-time investigation of the structural evolution of electrodes in a commercial lithium-ion battery containing a V-added LiFePO4 cathode using in-situ neutron powder diffraction
Publisher: Elsevier BV
Date: 12-2013
Characterization of an oxalate-phosphate-amine metal–organic framework (OPA-MOF) exhibiting properties suited for innovative applications in agriculture
Publisher: Springer Science and Business Media LLC
Date: 12-07-2016
Coexistence of ferroelectricity and magnetism in transition-metal-doped n = 3 Aurivillius phases
Publisher: IOP Publishing
Date: 06-12-2007
Understanding Structure–Function Relationship in Hybrid Co3O4–Fe2O3/C Lithium-Ion Battery Electrodes
Publisher: American Chemical Society (ACS)
Date: 14-09-2015
Abstract: A range of high-capacity Li-ion anode materials (conversion reactions with lithium) suffer from poor cycling stability and limited high-rate performance. These issues can be addressed through hybridization of multiple nanostructured components in an electrode. Using a Co3O4-Fe2O3/C system as an ex le, we demonstrate that the cycling stability and rate performance are improved in a hybrid electrode. The hybrid Co3O4-Fe2O3/C electrode exhibits long-term cycling stability (300 cycles) at a moderate current rate with a retained capacity of approximately 700 mAh g(-1). The reversible capacity of the Co3O4-Fe2O3/C electrode is still about 400 mAh g(-1) (above the theoretical capacity of graphite) at a high current rate of ca. 3 A g(-1), whereas Co3O4-Fe2O3, Fe2O3/C, and Co3O4/C electrodes (used as controls) are unable to operate as effectively under identical testing conditions. To understand the structure-function relationship in the hybrid electrode and the reasons for the enhanced cycling stability, we employed a combination of ex situ and in situ techniques. Our results indicate that the improvements in the hybrid electrode originate from the combination of sequential electrochemical activity of the transition metal oxides with an enhanced electronic conductivity provided by percolating carbon chains.
Ammonia-storage in lithium intercalated fullerides
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA05226B
Abstract: Li 6 C 60 can absorb up to 14 NH 3 per C 60 its structural evolution upon desorption is studied by neutron powder diffraction.
Nanostructured LiMnO2 with Li3PO4 Integrated at the Atomic Scale for High-Energy Electrode Materials with Reversible Anionic Redox
Publisher: American Chemical Society (ACS)
Date: 15-12-2020
Using in situ synchrotron X-ray diffraction to study lithium-and sodium-ion batteries: A case study with an unconventional battery electrode (Gd2 TiO5 )
Publisher: Springer Science and Business Media LLC
Date: 04-11-2015
DOI: 10.1557/JMR.2014.311
Local structural changes in LiMn1.5Ni0.5O4 spinel cathode material for lithium-ion batteries
Publisher: Elsevier BV
Date: 06-2014
Three-layer Aurivillius phases containing magnetic transition metal cations: Bi2-xSr2+x(Nb,Ta)2+xM1-xO12, M=Ru4+, Ir4+, Mn4+, x≈0.5
Publisher: Elsevier BV
Date: 2007
Recycling lithium-ion batteries: adding value with multiple lives
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0GC00269K
Abstract: A mixed metal compound from separation and processing of spent batteries is demonstrated to be feasible as a “second-life” anode.
Structure, crystal chemistry and thermal evolution of the δ-Bi2O3-related phase Bi9ReO17
Publisher: Elsevier BV
Date: 09-2009
A near dimensionally invariable high-capacity positive electrode material
Publisher: Springer Science and Business Media LLC
Date: 12-12-2022
In-situ neutron diffraction study of the MoS2 anode using a custom-built Li-ion battery
Publisher: Elsevier BV
Date: 09-2011
(Invited) Can a “Battery” Only be Used as a “Battery” or Can We Do More?
Publisher: The Electrochemical Society
Date: 02-2019
Abstract: Electrodes in batteries undergo a variety of changes during function. These include, but are not limited to intercalation, alloying and conversion reactions, evolution of the oxidation state of elements, crystal structures and the particle size (and distribution). Ideally minimal or controlled structural, morphological and macroscopic changes are desired for long term rechargeable battery function, and indeed many electrodes undergo transitions that are both highly reversible and irreversible. Furthermore, a variety of tools exist to probe these changes both in an in situ/operando and ex situ manner, e.g. Raman and NMR spectroscopy, X-ray, electron and neutron diffraction, to name a few techniques. This presentation will detail two inter-related but unconventional aspects of research recently performed by our group. We have been working towards using batteries or electrochemical cells as part of a synthetic strategy, whereby the changes induced by electrochemical reactions are purposefully used to generate new phases. These new phases are likely feature new properties and possibly new functionalities thus new applications. The energy storage aspects of the battery are replaced with the synthetic flexibility provided by applying controlled amounts of charge, for controlled amounts of time and being able to visualise changes using various in situ methods. We have coined the term electrochemically activated solid state synthesis, whereby an electrode reacted in an electrochemical cell is subsequently extracted and heated resulting in the generation of a range of new or metastable phases, most of which have not been previously reported. This has been demonstrated for materials within the Ta 1-x Nb x VO 5 and Sc 2 W 3-x Mo x O 12 families of electrodes used in Li, Na and K-based cells. A multitude of phase transitions are found with thermal treatments approximately at the onset of the decomposition of the binder used in the electrode. The talk will highlight the electrode preparation parameter space that can result in the generation of new phases, the identification of the phases and preliminary development of the mechanistic model associated with the synthetic strategy. The second part of this talk will detail our recent investigation into solar batteries, where an electrode is able to both generate photocurrent and store charge carriers with exposure to light. We detail a new in situ electrochemical cell used to verify structural evolution (charge storage) during photo-irradiation of a MoO 3 electrode providing direct experimental evidence for this process. The culmination of these ideas allows batteries to be more than batteries, or possibly more appropriately it allows electrodes to have multiple functions in electrochemical cells.
Preparation of Li1.03Mn1.97O4 and Li1.06Mn1.94O4 by the Polymer Precursor Method and X-ray, Neutron Diffraction and Electrochemical Studies
Publisher: The Electrochemical Society
Date: 2011
DOI: 10.1149/2.074111JES
Overcharging a lithium-ion battery: Effect on the LixC6 negative electrode determined by in situ neutron diffraction
Publisher: Elsevier BV
Date: 12-2013
Elucidation of structures and lithium environments for an organo-sulfur cathode
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CP03057C
Abstract: In-depth analysis of solid state NMR, XRD and X-ray absorption spectroscopy data is used to detail the function of an organo-sulfur cathode.
Re-investigation of the structure and crystal chemistry of the Bi2O3–W2O6 `type (Ib)' solid solution using single-crystal neutron and synchrotron X-ray diff
Publisher: International Union of Crystallography (IUCr)
Date: 26-02-2010
DOI: 10.1107/S0108768110001874
Abstract: Single crystals of composition Bi 35.66 W 4.34 O 66.51 (or Bi 8.2 WO 15.3 , bismuth tungsten oxide), within the type (Ib) solid-solution region of the Bi 2 O 3 –WO 3 system, were synthesized using the floating-zone furnace method. Synchrotron X-ray and neutron single-crystal diffraction data were used to confirm the previously tentative assignment of the room-temperature space group as I 4 1 . Fourier analysis of the combined X-ray and neutron datasets was used to elucidate and refine fully the cation and anion arrays for the first time. The mixed cation site M 1 is shown to be coordinated by eight O atoms in an irregular cube when M = Bi, and by six O atoms in an octahedron when M = W. The resulting disorder in the average structure around M 1 is discussed in the context of experimentally observed oxide-ion conductivity.
A (3+3)-Dimensional Hypercubic Oxide-Ionic Conductor: Type II Bi2O3-Nb2O5
Publisher: American Chemical Society (ACS)
Date: 18-04-2013
DOI: 10.1021/JA3109328
Abstract: The high-temperature cubic form of bismuth oxide, δ-Bi2O3, is the best intermediate-temperature oxide-ionic conductor known. The most elegant way of stabilizing δ-Bi2O3 to room temperature, while preserving a large part of its conductivity, is by doping with higher valent transition metals to create wide solid-solutions fields with exceedingly rare and complex (3 + 3)-dimensional incommensurately modulated "hypercubic" structures. These materials remain poorly understood because no such structure has ever been quantitatively solved and refined, due to both the complexity of the problem and a lack of adequate experimental data. We have addressed this by growing a large (centimeter scale) crystal using a novel refluxing floating-zone method, collecting high-quality single-crystal neutron diffraction data, and treating its structure together with X-ray diffraction data within the superspace symmetry formalism. The structure can be understood as an "inflated" pyrochlore, in which corner-connected NbO6 octahedral chains move smoothly apart to accommodate the solid solution. While some oxide vacancies are ordered into these chains, the rest are distributed throughout a continuous three-dimensional network of wide δ-Bi2O3-like channels, explaining the high oxide-ionic conductivity compared to commensurately modulated phases in the same pseudobinary system.
In Situ Powder Diffraction Studies of Electrode Materials in Rechargeable Batteries
Publisher: Wiley
Date: 29-07-2015
Abstract: The ability to directly track the charge carrier in a battery as it inserts/extracts from an electrode during charge/discharge provides unparalleled insight for researchers into the working mechanism of the device. This crystallographic-electrochemical information can be used to design new materials or modify electrochemical conditions to improve battery performance characteristics, such as lifetime. Critical to collecting operando data used to obtain such information in situ while a battery functions are X-ray and neutron diffractometers with sufficient spatial and temporal resolution to capture complex and subtle structural changes. The number of operando battery experiments has dramatically increased in recent years, particularly those involving neutron powder diffraction. Herein, the importance of structure-property relationships to understanding battery function, why in situ experimentation is critical to this, and the types of experiments and electrochemical cells required to obtain such information are described. For each battery type, selected research that showcases the power of in situ and operando diffraction experiments to understand battery function is highlighted and future opportunities for such experiments are discussed. The intention is to encourage researchers to use in situ and operando techniques and to provide a concise overview of this area of research.
Kinetics of the thermally-induced structural rearrangement of γ-MnO2
Publisher: American Chemical Society (ACS)
Date: 13-10-2014
DOI: 10.1021/JP506914J
SmFeO3 and Bi-doped SmFeO3 perovskites as an alternative class of electrodes in lithium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CE00780B
Abstract: The search for new electrodes in alkali-ion batteries requires the investigation of a variety of classes of materials, each showing subtly different crystal structure motifs or frameworks.
High-Performance NaVO3 with Mixed Cationic and Anionic Redox Reactions for Na-Ion Battery Applications
Publisher: American Chemical Society (ACS)
Date: 15-10-2020
In-situ neutron diffraction study of the simultaneous structural evolution of a LiNi0.5 Mn1.5 O4 cathode and a Li 4 Ti5 O12 anode in a LiNi0.5 Mn 1.5 O4 ∥Li4 Ti5 O12 full cell
Publisher: Elsevier BV
Date: 2014
Current-dependent electrode lattice fluctuations and anode phase evolution in a lithium-ion battery investigated by in situ neutron diffraction
Publisher: Elsevier BV
Date: 07-2013
Comparison of the structural evolution of the O3 and P2 phases of Na2/3Fe2/3Mn1/3O2 during electrochemical cycling
Publisher: Elsevier BV
Date: 06-2016
Maricite NaFePO4/C/graphene: a novel hybrid cathode for sodium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA04946C
Abstract: A maricite hybrid cathode of NaFePO 4 /C/graphene with a novel microstructure is produced by a modified ball-milling process based on a solid-state reaction. This structure is capable of delivering high sodium storage capacity with outstanding cycle stability.
Antimony-carbon nanocomposites for potassium-ion batteries: Insight into the failure mechanism in electrodes and possible avenues to improve cyclic stability
Publisher: Elsevier BV
Date: 02-2019
In Situ Neutron Diffraction Monitoring of Li7La3Zr2O12 Formation: Toward a Rational Synthesis of Garnet Solid Electrolytes.
Publisher: American Chemical Society (ACS)
Date: 14-04-2015
Interplay between Electrochemistry and Phase Evolution of the P2-type Na-x(Fe1/2Mn1/2)O-2 Cathode for Use in Sodium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 17-04-2015
Vanadium Substitution of LiFePO4 Cathode Materials To Enhance the Capacity of LiFePO4-Based Lithium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 08-11-2012
DOI: 10.1021/JP307047W
Effect of Ni-nanoparticles decoration on graphene to enable high capacity sodium-ion battery negative electrodes
Publisher: Elsevier BV
Date: 10-2017
Fluorinated (Nano)Carbons: CFx Electrodes and CFx‐Based Batteries
Publisher: Wiley
Date: 03-02-2021
Abstract: Fluorine‐based chemistry is widely used in commercial battery technology, from primary batteries consisting of Li/CF x to binders for electrodes in secondary lithium‐ion batteries. Fluorine‐based compounds are also formed during operation for both battery configurations as discharge products such as LiF or as components of the solid electrolyte interface (SEI) layers on electrodes. Herein, the fluorinated carbons or CF x detailing the commercialization of the first Li/CF x cells are discussed‐ the understanding of how performance is correlated to composition or x , the various methods to synthesize CF x compounds, the correlation between the nature of the CF bonds and electrochemical performance, the role of theoretical studies in such endeavors, the use of CF x in alternative battery chemistries and the wide range of techniques available to probe either CF x compounds in idually or CF x compounds in devices under electrochemical conditions. A picture of the field from which future directions can be derived is provided.
Synthesis and Characterization of Li(Co0.5Ni0.5)PO4 Cathode for Li-Ion Aqueous Battery Applications
Publisher: The Electrochemical Society
Date: 2011
DOI: 10.1149/1.3561764
Structural evolution and stability of Sc2(WO4)3after discharge in a sodium-based electrochemical cell
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7DT04374K
Abstract: The structural stability and evolution of Sc 2 (WO 4 ) 3 with temperature is altered when discharged versus Na in a half cell battery resulting in formation of novel crystalline phases.
Mechanistic implications of Li–S cell function through modification of organo-sulfur cathode architectures
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1CP01838H
Abstract: Solid-state NMR reveals unique correlations between lithium environments within an organo-sulfur cathode, providing key insight on the interfacial processes involved when using inverse vulcanised copolymers in lithium-sulfur cells.
The crystal structures and corresponding ion-irradiation response for the Tb(x) Yb(2−x) TiO5 series
Publisher: Elsevier BV
Date: 2018
Structure and Dynamics in Mg2+-Stabilized γ-Na3PO4
Publisher: American Chemical Society (ACS)
Date: 05-10-2021
DOI: 10.1021/JACS.1C06905
Formulation and mechanism of copper tartrate – a novel anode material for lithium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3CP02030D
Abstract: Batteries play an increasingly critical role in the functioning of contemporary society. This work illustrates a new family of electrode materials and an alternative method to produce the electrode for applications.
Hybrid Solid Polymer Electrolytes with Two-Dimensional Inorganic Nanofillers
Publisher: Wiley
Date: 20-11-2018
Abstract: Solid polymer electrolytes are of rapidly increasing importance for the research and development of future safe batteries with high energy density. The ersified chemistry and structures of polymers allow the utilization of a wide range of soft structures for all-polymer solid-state electrolytes. With equal importance is the hybrid solid-state electrolytes consisting of both "soft" polymeric structure and "hard" inorganic nanofillers. The recent emergence of the re-discovery of many two-dimensional layered materials has stimulated the booming of advanced research in energy storage fields, such as batteries, supercapacitors, and fuel cells. Of special interest is the mass transport properties of these 2D nanostructures for water, gas, or ions. This review aims at the current progress and prospective development of hybrid polymer-inorganic solid electrolytes based on important 2D materials, including natural clay and synthetic lamellar structures. The ion conduction mechanism and the fabrication, property and device performance of these hybrid solid electrolytes will be discussed.
Dopant and Current Rate Dependence on the Structural Evolution of P2‐Na2/3Mn0.8Zn0.1M0.1O2 (M=Cu, Ti): An Operando Study
Publisher: Wiley
Date: 06-2021
Abstract: Variable current rate operando XRD experiments were performed on the P2‐ Na 2/3 Mn 0.8 Zn 0.1 Cu 0.1 O 2 composition, which displays promising electrochemical properties. The data reveals the reversible formation of a new and previously undetected ordering reflection upon extraction of Na‐ions, and that small compositional alterations may dramatically impact structural evolution and electrochemical properties. For P2‐ Na 2/3 Mn 0.8 Zn 0.1 Cu 0.1 O 2 at all current rates examined (25, 50 and 100 mA.g −1 ), comparable structural evolution on charge is observed, but the structural evolution on discharge is shown to be significantly influenced by the current applied during the preceding charge step. For both P2‐ Na 2/3 Mn 0.8 Zn 0.1 Cu 0.1 O 2 and P2‐ Na 2/3 Mn 0.8 Zn 0.1 Ti 0.1 O 2 comparable structural evolution is observed only at a slower current rate of 25 mA.g −1 . Overall, the structural evolution of these layered materials is shown to be dependent on the cycling history, highlighting the significance of applied current rate during cycling, especially during the initial cycle.
Electrochemical and Structural Investigation of ReO3
Publisher: Wiley
Date: 21-03-2023
Abstract: The structural evolution with alkali ion insertion, and the subsequent thermal evolution of the alkali‐ion inserted ReO 3 electrodes are shown by employing in situ and ex situ synchrotron X‐ray diffraction (XRD). During Na and K insertion, there is a combination of intercalation into ReO 3 and a two‐phase reaction. Interestingly in the case of Li insertion, a more complex evolution is noted, which suggests a conversion reaction takes place at deep discharge (insertion). Following these ion insertion studies, extracted electrodes at various states of discharge (kinetically determined) were examined with variable temperature XRD. The thermal evolution of the A x ReO 3 phases, where A=Li, Na, or K, are significantly modified from the parent ReO 3 thermal evolution. This shows the impact of alkali‐ion insertion on the thermal properties of ReO 3 .
The use of deuterated ethyl acetate in highly concentrated electrolyte as a low-cost solvent for in situ neutron diffraction measurements of Li-ion battery electrodes
Publisher: Elsevier BV
Date: 08-2015
Lithium Extraction−Insertion from/into LiCoPO4 in Aqueous Batteries
Publisher: American Chemical Society (ACS)
Date: 14-01-2011
DOI: 10.1021/IE102267X
TiO2(B)@anatase hybrid nanowires with highly reversible electrochemical performance
Publisher: Elsevier BV
Date: 2011
Sc1.5Al0.5W3O12 Exhibits Zero Thermal Expansion between 4 and 1400 K
Publisher: American Chemical Society (ACS)
Date: 06-05-2021
Alkali Metal-Modified P2 NaxMnO2: Crystal Structure and Application in Sodium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 18-08-2020
Mechanistic insights into the phenomena of increasing capacity with cycle number: using pulsed-laser deposited MoO2thin film electrodes
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CP05718H
Abstract: Thin film electrodes often feature fluctuations in capacity with cycle number. This work shows how electrode reactions and peeling off the current collector is a plausible mechanism for these fluctuations.
Variation in structure and Li+-ion migration in argyrodite-type Li6PS5X (X = Cl, Br, I) solid electrolytes
Publisher: Springer Science and Business Media LLC
Date: 28-10-2011
Floating-zone growth of brownmillerite Sr2Fe2O5 and the observation of a chain-ordered superstructure by single-crystal neutron diffraction
Publisher: Elsevier BV
Date: 10-2012
Rb/Cs-Modified P2 Na0.7Mn0.8Mg0.2O2: Application in Sodium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 25-03-2019
Repurposing Waste Tires as Tunable Frameworks for Use in Sodium-Ion and Lithium–Sulfur Batteries
Publisher: American Chemical Society (ACS)
Date: 12-05-2021
Structural evolution of electrodes in the NCR and CGR cathode-containing commercial lithium-ion batteries cycled between 3.0 and 4.5 V: An operando neutron powder-diffraction study
Publisher: Springer Science and Business Media LLC
Date: 28-10-2014
DOI: 10.1557/JMR.2014.297
Li2MnSiO4 cathodes modified by phosphorous substitution and the structural consequences
Publisher: Elsevier BV
Date: 06-2014
Non-equilibrium Structural Evolution of the Lithium-Rich Li1+yMn2O4 Cathode within a Battery
Publisher: American Chemical Society (ACS)
Date: 04-03-2013
DOI: 10.1021/CM303851W
Correlating cycling history with structural evolution in commercial 26650 batteries using in operando neutron powder diffraction
Publisher: Elsevier BV
Date: 03-2017
Biphasic P2/O3-Na2/3Li0.18Mn0.8Fe0.2O2: a structural investigation
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0DT03351K
Abstract: The P2/O3 layered oxide system is thought to benefit from a synergistic enhancement, resulting from the presence of both phases, which makes it a promising cathode material for Na-ion battery applications.
Carbon coated Na7Fe7(PO4)6F3: A novel intercalation cathode for sodium-ion batteries
Publisher: Elsevier BV
Date: 12-2014
Mass production of Li4Ti5O12 with a conductive network via in situ spray pyrolysis as a long cycle life, high rate anode material for lithium ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA05178E
Abstract: Nanocrystalline Li 4 Ti 5 O 12 was synthesized by an in situ spray pyrolysis technique followed by heat treatment in N 2 for short periods of time, resulting in self-contained carbon originating from the organic synthetic precursors. The excellent high rate capability and full battery tests indicate that this is a promising 4 anode candidate for high power lithium-ion batteries.
Synthesis, structure, and electrochemical performance of magnesium-substituted lithium manganese orthosilicate cathode materials for lithium-ion batteries
Publisher: Elsevier BV
Date: 2012
Investigating New Electrode Materials for Better Sodium-Ion Batteries
Publisher: The Electrochemical Society
Date: 10-06-2016
Abstract: Currently the extensive use of portable electronic devices have given rise to the high demand for reliable high energy density storage in the form of batteries. Today, lithium-ion batteries (LIBs) are the leading technology as they offer high energy density and relatively long lifetimes.[1] However, safety issues and the rarity of lithium brings about the relatively high cost of these batteries.[2] To address this issue, sodium-ion batteries (SIBs) have been developed as a low cost alternative for LIBs.[2, 3] Sodium’s similar chemistry to lithium enables accessible parallel implementation of LIB technology into SIB and its natural abundance ensures that sodium can be acquired at a much cheaper price compared to lithium.[4, 5] Recent development of sustainable and clean energy sources such as solar and wind has also escalated the need for SIBs.[4, 6] The unstable supply of energy generated from these renewable energy sources makes an efficient and reliable energy storage system crucial to ensure a continuous flow of energy during times where the energy production is poor.[3, 6] Such large scale stationary energy storage systems will be unsuitable for LIBs due to its relatively high cost, however with SIBs this could be realized.[3] Nonetheless, challenges still remain for the development of SIBs. Optimization of electrode materials capable of reversible insertion/extraction of sodium-ions in a safe and economic way under high current density are required in order to produce commercially viable SIBs.[2, 7] Present materials commonly investigated for SIB positive electrodes are metal oxides, phosphates, sulfates and metal-organic frameworks (MOF), while carbon based materials are still a favorable choice as negative electrodes due to its low potential against Na, natural abundance, renewability, and low cost.[3, 4] Despite the fact that the reversible intercalation of sodium-ion into/from graphite is not significant, research has shown that other carbon based materials can be used.[8-10]. Although these electrode materials in SIBs have been studied from an electrochemical perspective, further work is still needed to understand the insertion/extraction mechanism of sodium ions into these materials and more importantly how sodium moves inside these materials. As the structure and chemical environment of materials are closely related to their properties, it is very important to understand the mechanism to be able to design new materials with desired properties. In this study, we use a combination of in-situ X-ray diffraction (XRD), solid state nuclear magnetic resonance (SS-NMR) and quasi-elastic neutron scattering (QENS) to study the mechanism of sodium-ion insertion/extraction in some selected electrode materials. XRD will provide long range ordering of the structure of the material. SS-NMR will provide the local environment of the sodium, and QENS enables insight on the diffusion mechanism of the sodium ions inside the selected materials. The combination of these three techniques will provide a more complete picture of the mechanism of sodium-ion insertion/extraction and movement inside the electrode materials. If these mechanisms can be properly understood, it will be possible to design a safe and reliable SIB which could be an alternative to LIB realizing a cheaper energy storage system for the world. This talk will focus on our first results based on carbon based materials such as carbon nanotubes and graphene. With characterization using XRD and SS-NMR we were able to compare the structure and the chemical environment of the sodium within these carbons after charge and discharge, giving interesting insight on how these materials will behave in a battery. References [1] J.M. Tarascon, M. Armand, Nature, 414 (2001) 359-367. [2] V. Palomares, P. Serras, I. Villaluenga, K.B. Hueso, J. Carretero-Gonzalez, T. Rojo, Energ. Environ. Sci., 5 (2012) 5884-5901. [3] M. Sawicki, L.L. Shaw, RSC Advances, 5 (2015) 53129-53154. [4] H. Kang, Y. Liu, K. Cao, Y. Zhao, L. Jiao, Y. Wang, H. Yuan, Journal of Materials Chemistry A, 3 (2015) 17899-17913. [5] M.D. Slater, D. Kim, E. Lee, C.S. Johnson, Adv. Funct. Mater., 23 (2013) 947-958. [6] N.-S. Choi, Z. Chen, S.A. Freunberger, X. Ji, Y.-K. Sun, K. Amine, G. Yushin, L.F. Nazar, J. Cho, P.G. Bruce, Angew. Chem. Int. Ed., 51 (2012) 9994-10024. [7] J.C. Pramudita, D. Pontiroli, G. Magnani, M. Gaboardi, M. Riccò, C. Milanese, H.E.A. Brand, N. Sharma, ChemElectroChem, 2 (2015) 600-610. [8] A. Ponrouch, A.R. Goñi, M.R. Palacín, Electrochem. Commun., 27 (2013) 85-88. [9] V.G. Pol, E. Lee, D. Zhou, F. Dogan, J.M. Calderon-Moreno, C.S. Johnson, Electrochim. Acta, 127 (2014) 61-67. [10] P. Thomas, D. Billaud, Electrochim. Acta, 47 (2002) 3303-3307.
The Role of Carbon-Based Cathode Components in Li–S Batteries
Publisher: The Electrochemical Society
Date: 2023
Abstract: Carbon-based cathode materials play a crucial role in the development of alternative battery technologies. For lithium-sulfur batteries, carbonaceous S-hosts and carbon-sulfur copolymers have been reliably used as cathode materials to improve battery cyclability and working lifetimes. Characterizing these carbon-based materials in their as-prepared state, when fabricated into cathodes, and during electrochemical function requires the use of multiple complementary techniques probing various length scales, e.g., atomic, nanometer, micrometer. Appropriate coupling of characterization techniques and interpretation of data allows researchers to accurately establish the relationship between composition, structure, and property, which in turn facilitates rational design of complex materials. These combined strategies have provided some of the most detailed insights surrounding the role and design of carbon-based materials to date. This review covers some of the ways both conventional and emerging analytical techniques have been used by researchers to investigate carbon-based cathode materials for Li-S batteries.
Synthetic, Structural, and Electrochemical Study of Monoclinic Na4Ti5O12 as a Sodium-Ion Battery Anode Material
Publisher: American Chemical Society (ACS)
Date: 12-12-2014
DOI: 10.1021/CM5035358
How Crystallographic Evolution of Sodium within Electrodes during Sodium-Ion Battery Function Can be Used to Make Better Electrodes?
Publisher: The Electrochemical Society
Date: 10-06-2016
Abstract: A large proportion of the function of batteries arises from the electrodes, and these are in turn mediated by the atomic-scale perturbations or changes in the crystal structure during an electrochemical process (e.g. battery use). Sodium insertion and extraction into/from electrodes during charge/discharge can lead to dramatic changes in the crystal structure and these are typically detrimental to performance. By understanding how and when large structural changes occur, electrochemical limits and solid state chemistry can be invoked to provide solutions. Therefore, to understand battery function and improve performance it is critical to probe the crystal structure evolution in situ or operando - while an electrochemical process is occurring inside a battery. This presentation will showcase some of our recent work on tracking the structural evolution of electrodes during battery operation with a particular emphasis on the sodium location and distribution. Ex les will include studies on the Na 3 V 2 O 2x (PO 4 ) 2 F 3-2x system, Fe[Fe(CN) 6 ]1-x.yH 2 O framework materials, layered P2 and O3 polymorphs of Na 2/3 Fe 2/3 Mn 1/3 O 2 at varying current rates and layered P2 Na 2/3 Mn 0.8 Ti 0.1 Fe 0.1 O 2 and Na 2/3 Mn 0.8 Mg 0.2 O 2 materials. The relationship between electrochemical parameters such as current rate, number of cycles and battery history will be tied with phase transitions and sodium site occupancy evolution. Such detailed relationships will help to build an atomic scale picture of electrode functionality. The message in the presentation will be the ability to literally “see” how sodium behaves in such electrodes and thus build a sodium-centred picture of battery function. For room temperature sodium-ion batteries based on intercalation chemistry to become a reality the insertion/extraction process needs to be understood and manipulated.
Sodium uptake in cell construction and subsequent in operando electrode behaviour of Prussian blue analogues, Fe[Fe(CN)6 ]1-x ·yH2 O and FeCo(CN)6
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4CP02676D
Abstract: The evolution of sodium site occupancies and lattice of Prussian blue analogue frameworks during sodium-ion battery function.
Investigation of K modified P2 Na 0.7 Mn 0.8 Mg 0.2 O 2 as a cathode material for sodium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8CE01532E
Abstract: We demonstrate that K addition to P2-Na 0.7 Mn 0.8 Mg 0.2 O 2 results in an inhomogeneous distribution and leads to inferior electrochemical performance relative to the parent.
Towards a reliable Li-metal-free LiNO3-free Li-ion polysulphide full cell via parallel interface engineering
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8EE00937F
Abstract: Synchronously engineering the interface compatibility of the anode and the cathode in a Li–polysulfide electrolyte enables a full cell design with improved safety, durability and performance.
In situ neutron powder diffraction using custom-made lithium-ion batteries
Publisher: MyJove Corporation
Date: 10-11-2014
DOI: 10.3791/52284
High capacity spherical Li[Li0.24Mn0.55Co0.14Ni0.07]O2 cathode material for lithium ion batteries
Publisher: Elsevier BV
Date: 02-2013
Lithium Germanate (Li2GeO3): A High-Performance Anode Material for Lithium-Ion Batteries
Publisher: Wiley
Date: 23-11-2016
Abstract: A simple, cost-effective, and easily scalable molten salt method for the preparation of Li
Rate Dependent Performance Related to Crystal Structure Evolution of Na0.67Mn0.8Mg0.2O2 in a Sodium-Ion Battery
Publisher: American Chemical Society (ACS)
Date: 15-10-2015
Thermal Evolution and Phase Transitions in Electrochemically Activated Sc2(MoO4)3
Publisher: American Chemical Society (ACS)
Date: 24-07-2019
DOI: 10.1021/ACS.INORGCHEM.9B01116
Abstract: Sc
Higher permittivity of Ni-doped lead zirconate titanate, Pb[(Zr0.52Ti0.48)(1-x) Nix]O3, ceramics
Publisher: Elsevier BV
Date: 03-2019
Elucidation of the high-voltage phase in the layered sodium ion battery cathode material P3–Na0.5Ni0.25Mn0.75O2
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA06600A
Abstract: This research work reveals a fully desodiated phase, which might lead to higher voltage/capacity for sodium ion battery.
Liquid Metal-Templated Tin-Doped Tellurium Films for Flexible Asymmetric Pseudocapacitors
Publisher: American Chemical Society (ACS)
Date: 02-11-2022
Abstract: Liquid metals can be surface activated to generate a controlled galvanic potential by immersing them in aqueous solutions. This creates energized liquid-liquid interfaces that can promote interfacial chemical reactions. Here we utilize this interfacial phenomenon of liquid metals to deposit thin films of tin-doped tellurium onto rigid and flexible substrates. This is accomplished by exposing liquid metals to a precursor solution of Sn
High Performance Composite Lithium-Rich Nickel Manganese Oxide Cathodes for Lithium-Ion Batteries
Publisher: The Electrochemical Society
Date: 2013
DOI: 10.1149/2.093310JES
Mechanistic and structural investigation of Lix MnO2 cathodes during cycling in Li-ion batteries
Publisher: Elsevier BV
Date: 08-2014
Understanding the Behavior of LiCoO2 Cathodes at Extended Potentials in Ionic Liquid–Alkyl Carbonate Hybrid Electrolytes
Publisher: American Chemical Society (ACS)
Date: 12-07-2017
Local Structure Adaptations and Oxide Ionic Conductivity in the Type III Stability Region of (1 - X)Bi2 O3 · xNb2 O5
Publisher: American Chemical Society (ACS)
Date: 02-05-2018
A comprehensive picture of the current rate dependence of the structural evolution of P2-Na2/3Fe2/3Mn1/3O2
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA04976H
Abstract: The structural evolution of the P2-Na 2/3 Fe 2/3 Mn 1/3 O 2 electrode during charge/discharge and as a function of applied current is shown.
Insights into the Fast Sodium Conductor NASICON and the Effects of Mg2+ Doping on Na+ Conductivity
Publisher: American Chemical Society (ACS)
Date: 04-11-2021
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