ORCID Profile
0000-0001-7793-0044
Current Organisation
Fudan University
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
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.
Nanomaterials | Functional Materials | Materials Engineering
Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in Technology |
Publisher: Wiley
Date: 29-04-2016
Abstract: A new and generic strategy to construct interwoven carbon nanotube (CNT) branches on various metal oxide nanostructure arrays (exemplified by V2 O3 nanoflakes, Co3 O4 nanowires, Co3 O4 -CoTiO3 composite nanotubes, and ZnO microrods), in order to enhance their electrochemical performance, is demonstrated for the first time. In the second part, the V2 O3 /CNTs core/branch composite arrays as the host for Na(+) storage are investigated in detail. This V2 O3 /CNTs hybrid electrode achieves a reversible charge storage capacity of 612 mAh g(-1) at 0.1 A g(-1) and outstanding high-rate cycling stability (a capacity retention of 100% after 6000 cycles at 2 A g(-1) , and 70% after 10 000 cycles at 10 A g(-1) ). Kinetics analysis reveals that the Na(+) storage is a pseudocapacitive dominating process and the CNTs improve the levels of pseudocapacitive energy by providing a conductive network.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9EE03549D
Abstract: This review provides enriched information for understanding the charge storage mechanisms of transition metal dichalcogenides (TMDs), as well as the importance of intrinsic structure engineering for enhancing the performance of TMDs in energy storage.
Publisher: Wiley
Date: 14-04-2023
Abstract: In the literature, Zn–Mn aqueous batteries (ZMABs) confront abnormal capacity behavior, such as capacity fluctuation and erse “unprecedented performances.” Because of the electrolyte additive‐induced complexes, various charge/discharge behaviors associated with different mechanisms are being reported. However, the current performance assessment remains unregulated, and only the electrode or the electrolyte is considered. The lack of a comprehensive and impartial performance evaluation protocol for ZMABs hinders forward research and commercialization. Here, a pH clue (proton‐coupled reaction) to understand different mechanisms is proposed and the capacity contribution is normalized. Then, a series of performance metrics, including rated capacity ( C r ) and electrolyte contribution ratio from Mn 2+ (CfM), are systematically discussed based on erse energy storage mechanisms. The relationship between Mn (II) ↔ Mn (III) ↔ Mn (IV) conversion chemistry and protons consumption roduction is well‐established. Finally, the concrete design concepts of a tunable H + /Zn 2+ /Mn 2+ storage system for customized application scenarios, opening the door for the next‐generation high‐safety and reliable energy storage system, are proposed.
Publisher: Wiley
Date: 05-07-2021
Abstract: Dendrite growth and by‐products in Zn metal aqueous batteries have impeded their development as promising energy storage devices. We utilize a low‐cost additive, glucose, to modulate the typical ZnSO 4 electrolyte system for improving reversible plating/stripping on Zn anode for high‐performance Zn ion batteries (ZIBs). Combing experimental characterizations and theoretical calculations, we show that the glucose in ZnSO 4 aqueous environment can simultaneously modulate solvation structure of Zn 2+ and Zn anode‐electrolyte interface. The electrolyte engineering can alternate one H 2 O molecule from the primary Zn 2+ ‐6H 2 O solvation shell and restraining side reactions due to the decomposition of active water. Concomitantly, glucose molecules are inclined to absorb on the surface of Zn anode, suppressing the random growth of Zn dendrite. As a proof of concept, a symmetric cell and Zn‐MnO 2 full cell with glucose electrolyte achieve boosted stability than that with pure ZnSO 4 electrolyte.
Publisher: Wiley
Date: 22-12-2014
Publisher: Elsevier BV
Date: 03-2019
Publisher: Wiley
Date: 30-05-2016
Publisher: Elsevier BV
Date: 06-2023
Publisher: Elsevier BV
Date: 11-2018
DOI: 10.1016/J.JCIS.2018.06.036
Abstract: A number of observations have been reported on chemical capture and catalysis of anchoring materials for lithium-sulfur batteries. Here, we propose the design principles for the chemical functioned graphene as an anchor material to realize both strong chemical trapping and catalysis. Through the first principle, the periodic law is calculated from the theory. Seven different co-doping series were investigated, e.g. MN
Publisher: Elsevier BV
Date: 04-2012
Publisher: Springer Science and Business Media LLC
Date: 26-10-2015
DOI: 10.1038/SREP15665
Abstract: A stable Si-based anode with a high initial coulombic efficiency (ICE) for lithium-ion batteries (LIB) is critical for energy storage. In the present paper, a new scalable method is adopted in combination with giant nitrogen-doped graphene and micron-size electrode materials. We first synthesize a new type of freestanding LIB anode composed of micron-sized Si (mSi) particles wrapped by giant nitrogen-doped graphene (mSi@GNG) film. High ICE ( %) and long cycle life (more than 80 cycles) are obtained. In the mSi@GNG composite, preferential formation of a stable solid electrolyte interphase (SEI) on the surface of graphene sheets is achieved. The formation and components of SEI are identified for the first time by using UV-resonance Raman spectroscopy and Raman mapping, which will revive the study of formation and evolution of SEI by Raman. New mechanism is proposed that the giant graphene sheets protect the mSi particles from over-lithiation and fracture. Such a simple and scalable method may also be applied to other anode systems to boost their energy and power densities for LIB.
Publisher: Elsevier BV
Date: 03-2014
Publisher: Cold Spring Harbor Laboratory
Date: 02-11-2019
DOI: 10.1101/19011072
Abstract: Cholera was introduced into Haiti in 2010. Since, there have been over 820,000 reported cases and nearly 10,000 deaths. The year 2019 has seen the lowest reported number of cases since the epidemic began. Oral cholera vaccine (OCV) is safe and effective, but has generally not been seen as a primary tool for cholera elimination due to a limited period of protection and constrained supplies. Regionally, epidemic cholera is contained to the island of Hispaniola. Hence, Haiti may represent a unique opportunity to eliminate cholera by use of OCV. We assess the probability of elimination and the potential health impact of OCV use in Haiti by leveraging simulations from four independent modeling teams. For a 10-year projection period, we compared the impact of five vaccination c aign scenarios, differing in geographic scope, vaccination coverage, and rollout duration to a status quo scenario without vaccination. Teams used common calibration data and assumptions for vaccine efficacy and vaccination scenarios, but all other model features and assumptions were determined independently. A two-department OCV c aign proposed in Haiti’s national plan for elimination had less than 50% probability of elimination across models, and only ambitious, nationwide c aigns had a high probability of reaching this goal. Despite their low probability of elimination, two-department c aigns averted a median of 13-58% of infections across models over the five years after the start of vaccination c aigns a nationwide c aign implemented at the same coverage and rollout duration averted a median of 58-95% of infections across models. Despite recent declines in cholera cases in Haiti, bold action is needed to promote elimination of cholera from the region. Large-scale cholera vaccination c aigns in Haiti offer the opportunity to synchronize nationwide immunity, providing near-term protection to the population while improvements to water and sanitation infrastructure create an environment favorable to long-term cholera elimination. We searched PubMed without language or date restrictions on October 4, 2019 for all records matching (“cholera*” AND “Haiti” AND (“vaccin*” OR “elim*”)) in any field and added one known article on the probability of elimination of cholera that was not indexed by PubMed to our review. Of 94 results, four articles were not about the cholera outbreak in Haiti or the use of cholera vaccination, and 34 were not original research articles. Fourteen articles presented research on cholera biology or cholera vaccine biology, either through discussion of Vibrio cholerae genetics, immunogenicity of oral cholera vaccine (OCV), or prospective vaccine candidate antigens. Twenty articles assessed OCV vaccine effectiveness, evaluated OCV c aign implementation or attitudes and knowledge about cholera control, or presented lessons learned on outbreak response and policy as a result of the Haiti cholera outbreak. Seven articles were about general cholera outbreak epidemiology in Haiti, and six articles were related to cholera transmission models outside our research scope. Of the nine remaining articles, five examined the impact of potential OCV c aigns at an early time point when Haiti’s cholera outbreak still exhibited epidemic dynamics, and one other projected the impact of the OCV c aigns planned after Hurricane Matthew in 2016. Two of the articles considered prospects for cholera elimination in Haiti in 2013 and 2014 and found that further targeted interventions were needed. One final study from 2017 modeled the possibility for OCV c aigns to eliminate cholera transmission in the Ouest department within a few years. Previous assessments of the impact of OCV use in Haiti occurred during early points of the outbreak when OCV c aigns were unlikely to lead to cholera elimination. Our study projects cholera transmission in Haiti with multiple years of more recent data, and directly examines prospect of cholera elimination in the status quo and under various mass OCV c aign scenarios. In bringing together results from multiple modeling teams, our study provides robust evidence about the current state of cholera transmission across Haiti and the potential impact of multiple mass OCV c aign scenarios. While 2019 has seen the lowest number of cholera cases in Haiti since the outbreak began, model simulations suggest that it may be possible for cholera transmission to persist without additional cholera control interventions.While a single two-department vaccination c aign may avert roughly 13-58% of infections with V. cholerae over a five year period, only a nationwide c aign led to a high probability of cholera elimination. Ambitious nationwide vaccination c aigns may break the cycle of endemic cholera transmission in Haiti as long-term improvements to water and sanitation infrastructure, which will limit the effects of potential re-introductions of Vibrio cholerae , are being made.
Publisher: Elsevier BV
Date: 09-2012
Publisher: Wiley
Date: 02-05-2019
Publisher: Elsevier BV
Date: 05-2018
Publisher: American Chemical Society (ACS)
Date: 02-06-2016
Abstract: The lithium-sulfur (Li-S) battery presents a promising rechargeable energy storage technology for the increasing energy demand in a worldwide range. However, current main challenges in Li-S battery are structural degradation and instability of the solid-electrolyte interphase caused by the dissolution of polysulfides during cycling, resulting in the corrosion and loss of active materials. Herein, we developed novel hybrids by employing metal-organic polyhedron (MOP) encapsulated PVP-functionalized sulfur nanoparticles (S@MOP), where the active sulfur component was efficiently encapsulated within the core of MOP and PVP as a surfactant was helpful to stabilize the sulfur nanoparticles and control the size and shape of corresponding hybrids during their syntheses. The amount of sulfur embedded into MOP could be controlled according to requirements. By using the S@MOP hybrids as cathodes, an obvious enhancement in the performance of Li-S battery was achieved, including high specific capacity with good cycling stability. The MOP encapsulation could enhance the utilization efficiency of sulfur. Importantly, the structure of the S@MOP hybrids was very stable, and they could last for almost 1000 cycles as cathodes in Li-S battery. Such high performance has rarely been obtained using metal-organic framework systems. The present approach opens up a promising route for further applications of MOP as host materials in electrochemical and energy storage fields.
Publisher: IOP Publishing
Date: 25-04-2018
Publisher: Elsevier BV
Date: 05-2017
Publisher: Wiley
Date: 20-01-2022
Abstract: Magnesium batteries present high volumetric energy density and dendrite‐free deposition of Mg, drawing wide attention in energy‐storage devices. However, their further development remains stagnated due to relevant interfacial issues between the Mg anode and the electrolyte and sluggish solid‐state diffusion kinetics of Mg 2+ ions. Herein, an in situ conversion chemistry to construct a nanostructured Bi anode from bismuth selenide driven by Li + is proposed. Through the combination of operando synchrotron X‐ray diffraction, ex situ synchrotron X‐ray absorption spectroscopy, and comprehensive electrochemical tests, it is demonstrated that the nanosize of the in‐situ‐formed Bi crystals contributes to the fast Mg 2+ diffusion kinetics and highly efficient Mg–Bi alloingy/de‐alloying. The resultant Bi anodes exhibit superior long‐term cycling stability with over 600 cycles under a high current density of 1.0 A g ‐1 . This work provides a new approach to construct alloy anode and paves the way for exploring novel electrode materials for magnesium batteries.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA00967A
Abstract: Dual-shell structured sodium titanate cubes with oxygen vacancies are rationally designed and synthesized. Various state-of-the-art approaches offer understandings of its enhanced ion kinetics as an anode for sodium-ion battery..
Publisher: Elsevier BV
Date: 12-2017
Publisher: Wiley
Date: 30-10-2023
Publisher: Elsevier BV
Date: 07-2014
Publisher: Wiley
Date: 06-06-2022
Abstract: Sodium‐ion batteries (SIBs) are a promising candidate for grid‐scale energy storage, however, the sluggish ion‐diffusion kinetics brought by the large radius of Na + seriously limits the performance of SIBs, let alone at low temperatures. Herein, a confined acid–base pair self‐assembly strategy to synthesize unusual Ti 0.88 Nb 0.88 O 4− x @C for high‐performance SIBs operating at room and low temperatures is proposed. The confinement self‐assembly of the acid–base pair around the micelles and confined crystallization by the carbon layer realize the formation of ordered and stoichiometric mesoporous frameworks with opened ion channels. Thus, the mesoporous Ti 0.88 Nb 0.88 O 4− x @C exhibits rapid Na + diffusion kinetics at 25 and −40 °C, which are one order higher than that of the nonporous one. A high reversible capacity of 233 mAh g −1 , excellent rate (a specific capacity of 103 mAh g −1 at 50 C), and cycling performances ( .03% fading per cycle) can be observed at 25 °C. More importantly, even at −40 °C, the mesoporous Ti 0.88 Nb 0.88 O 4– x @C can still deliver the 161 mAh g −1 capacity, a high initial Coulombic efficiency of 60% and outstanding cycling stability (99 mAh g −1 at 0.5 C after 500 cycles). It is believed this strategy opens a new avenue for constructing novel mesoporous electrode materials for low‐temperature energy storage.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6MH00556J
Abstract: For the first time two phase MnO 2 nanostructures are constructed into core-branch arrays which deliver high pseudocapacitance.
Publisher: Wiley
Date: 12-03-2020
Publisher: American Chemical Society (ACS)
Date: 22-06-2022
DOI: 10.1021/JACS.2C03814
Abstract: Constructing hierarchical three-dimensional (3D) mesostructures with unique pore structure, controllable morphology, highly accessible surface area, and appealing functionality remains a great challenge in materials science. Here, we report a monomicelle interface confined assembly approach to fabricate an unprecedented type of 3D mesoporous N-doped carbon superstructure for the first time. In this hierarchical structure, a large hollow locates in the center (∼300 nm in diameter), and an ultrathin monolayer of spherical mesopores (∼22 nm) uniformly distributes on the hollow shells. Meanwhile, a small hole (4.0-4.5 nm) is also created on the interior surface of each small spherical mesopore, enabling the superstructure to be totally interconnected. Vitally, such interconnected porous supraparticles exhibit ultrahigh accessible surface area (685 m
Publisher: Wiley
Date: 30-09-2019
Publisher: Wiley
Date: 25-05-2021
Abstract: The exploration of efficient electrocatalysts for energy conversion is important for green energy development. Owing to their high surface areas and unusual electronic structure, 2D electrocatalysts have attracted increasing interest. Among them, non‐van der Waals (non‐vdW) 2D materials with numerous chemical bonds in all three dimensions and novel chemical and electronic properties beyond those of vdW 2D materials have been studied increasingly over the past decades. Herein, the progress of non‐vdW 2D electrocatalysts is critically reviewed, with a special emphasis on electronic structure modulation. Strategies for heteroatom doping, vacancy engineering, pore creation, alloying, and heterostructure engineering are analyzed for tuning electronic structures and achieving intrinsically enhanced electrocatalytic performances. Lastly, a roadmap for the future development of non‐vdW 2D electrocatalysts is provided from material, mechanism, and performance viewpoints.
Publisher: Wiley
Date: 18-01-2021
Publisher: Wiley
Date: 15-08-2022
Abstract: Layered transition metal dichalcogenides (TMDs) are promising candidates for aqueous zinc‐based batteries owing to the large interlayer distance. Nevertheless, the low specific capacity of unmodified TMDs due to the high binding energy between host materials and carriers in electrolytes hinder their further development. Herein, a simple method to incorporate oxygen is reported to enhance the specific capacity of MoSe 2 . The in situ and ex situ characterization results confirm that the oxygen incorporated MoSe 2 experiences proton‐dominated insertion electrochemistry during cycling. In addition, the theoretical calculation results demonstrate that the oxygen atoms with high electronegativity can effectively reduce the binding energy of adsorbing H + and change charge distribution in the interlayer. As a result, incorporating oxygen significantly promotes H + adsorption and diffusion, and thus greatly increases the specific capacity of MoSe 2 . This study provides an effective strategy to facilitate the kinetics of TMDs, and thus achieve high‐performance aqueous zinc‐based batteries.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1EE00110H
Abstract: Advanced in situ technologies for understanding the mechanism of Li/Na metal anodes including in situ reactions, to form a specific interface layer and in situ characterization to capture transient metastable information continuously as a function of time.
Publisher: American Chemical Society (ACS)
Date: 03-01-2020
DOI: 10.1021/JACS.9B11774
Abstract: Lean-electrolyte conditions are highly pursued for practical lithium (Li) metal batteries. The previous studies on the Li metal anodes, in general, exhibited good stability with a large excess of electrolyte. However, the targeted design of Li hosts under relatively low electrolyte conditions has been rarely studied so far. Herein, we have shown that electrolyte consumption severely affects the cycling stability of Li metal anode. Considering carbon hosts as typical ex les, we innovatively employed in situ synchrotron X-ray diffraction, in situ Raman spectroscopy, and theoretical computations to obtain a better understanding of the Li nucleation/deposition processes. We also showed the usefulness of in situ electrochemical impedance spectra to analyze interfacial fluctuation at the Li/electrolyte interface, together with nuclear magnetic resonance data to quantify electrolyte consumption. We have found that uneven Li nucleation/deposition and the crack of surface-area-derived solid-electrolyte interface (SEI) layer both lead to a great consumption of electrolyte. Then, we suggested a design principle for Li host to overcome the electrolyte loss, that is, uneven growth of the Li structure and the crack of the SEI layer must be simultaneously controlled. As a proof of concept, we demonstrated the usefulness of a 3D low-surface-area defective graphene host (L-DG) to control Li nucleation/deposition and stabilize the SEI layer, contributing to a highly reversible Li plating/stripping. As a result, such a Li host can achieve stable cycles (e.g., 1.0 mAh cm
Publisher: Cold Spring Harbor Laboratory
Date: 04-11-2020
DOI: 10.1101/2020.10.31.20223776
Abstract: As COVID-19 cases resurge in the United States, understanding the complex interplay between human behavior, disease transmission, and non-pharmaceutical interventions during the pandemic could provide valuable insights to focus future public health efforts. Cell-phone mobility data offers a modern measurement instrument to investigate human mobility and behavior at an unprecedented scale. We investigate mobility data collected, aggregated, and anonymized by SafeGraph Inc. which measures how populations at the census-block-group geographic scale stayed at home in California, Georgia, Texas, and Washington since the beginning of the pandemic. Using manifold learning techniques, we find patterns of mobility behavior that align with stay-at-home orders, correlate with socioeconomic factors, cluster geographically, and reveal sub-populations that likely migrated out of urban areas. The analysis and approach provides policy makers a framework for interpreting mobility data and behavior to inform actions aimed at curbing the spread of COVID-19.
Publisher: Elsevier BV
Date: 2022
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 06-2019
Publisher: Elsevier BV
Date: 07-2021
Publisher: Elsevier BV
Date: 06-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4MH00212A
Abstract: VO 2 nanoarrays are grown on graphene foam and the surface is coated with HMB for performance enhancement as LIB and supercapacitor electrodes.
Publisher: Wiley
Date: 21-02-2019
Publisher: Wiley
Date: 12-03-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0EE01221A
Abstract: The bias of Ni–Zn batteries between practical applications with gravimetrical limits and scientific research with volumetrical shortages has been corrected.
Publisher: Wiley
Date: 06-2022
Abstract: Rechargeable aqueous batteries are considered to be one of the most effective energy storage technologies to balance the cost‐efficiency, safety, and energy ower demands. The further progress of aqueous batteries with high energy density is needed to meet the ever‐increasing energy‐storage demands. This review highlights the strategies proposed so far to pursue the high energy density aqueous batteries, including the aspects of the electrolytes (from concentrated to dilute), the electrode chemistry (from inserted to converted), the cathode materials (from inorganic to organic), the anode materials (from compound to metallic), and the battery configurations (from integrated to decoupled). Critical appraisals of the emerging electrochemistry are presented for addressing the key issues in boosting the energy densities. Finally, the authors render insights into the future development of high‐energy aqueous batteries.
Publisher: Wiley
Date: 12-02-2023
Abstract: Poor electronic and ionic conductivity of electrode materials at low temperatures of −20 °C and below has significantly impeded development of batteries for cold conditions. However, for the first time, layer‐structured metallic vanadium diselenide (1T‐VSe 2 ) is reported as a cathode material for low‐temperature Mg 2+ /Li + hybrid batteries. A high electronic conductivity and fast ion diffusion kinetics for 1T‐VSe 2 are demonstrated at selected temperatures, and a very safe 1T‐VSe 2 /Mg battery for operation at temperatures to −40 °C. The battery exhibits 97% capacity retention over 500 cycles, which is better performance than reported Mg‐based batteries. The Jahn–Teller effect in compressed configuration is initiated in 1T‐VSe 2 with the change of electronic state occurring on electrochemical intercalation of alkali metal ions. Using combined experiment and theory via operando synchrotron X‐ray diffraction, ex situ X‐ray absorption spectroscopy and DFT computation, it is confirmed that the weak Jahn–Teller distortion contributes significantly to fast‐overall kinetics, structural stability, and high electronic conductivity of the electrode. Understanding at an atomic level of the mechanism is demonstrated, that provides valuable guidance in designing high‐performance electrode materials for low‐temperature batteries.
Publisher: Wiley
Date: 27-07-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9RA10485B
Abstract: The control of structure and morphology in an electrode design for the development of large-power lithium ion batteries is crucial to create efficient transport pathways for ions and electrons.
Publisher: Wiley
Date: 09-07-2020
Publisher: Elsevier BV
Date: 03-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA03870G
Abstract: The sp 2 -hybridized GF/CNT film provides a robust framework with an ideal contact for boosting the vast growth of MoS 2 nanosheets and immobilizing them, in favor of an increased areal loading but improved stability of the active materials.
Publisher: OSA
Date: 2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7NR02028G
Abstract: Due to the easy intralayer gliding and weak interlayer van der Waals interaction in transition metal dichalcogenides (TMDs), ion (particularly Li
Publisher: Elsevier BV
Date: 03-2014
Publisher: American Association for the Advancement of Science (AAAS)
Date: 22-05-2020
Abstract: Aqueous batteries are a reliable alternative for next-generation safe, low-cost, and scalable energy storage.
Publisher: Wiley
Date: 10-01-2018
Publisher: Wiley
Date: 08-05-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA01979B
Abstract: A simple, low-cost and energy-effective method has been developed to fabricate giant graphene sheets by double microwave assisted exfoliations.
Publisher: Wiley
Date: 03-04-2023
Abstract: Hard carbons (HCs) with high sloping capacity are considered as the leading candidate anode for sodium‐ion batteries (SIBs) nevertheless, achieving basically complete slope‐dominated behavior with high rate capability is still a big challenge. Herein, the synthesis of mesoporous carbon nanospheres with highly disordered graphitic domains and MoC nanodots modification via a surface stretching strategy is reported. The MoO x surface coordination layer inhibits the graphitization process at high temperature, thus creating short and wide graphite domains. Meanwhile, the in situ formed MoC nanodots can greatly promote the conductivity of highly disordered carbon. Consequently, MoC@MCNs exhibit an outstanding rate capacity (125 mAh g −1 at 50 A g −1 ). The “adsorption‐filling” mechanism combined with excellent kinetics is also studied based on the short‐range graphitic domains to reveal the enhanced slope‐dominated capacity. The insight in this work encourages the design of HC anodes with dominated slope capacity toward high‐performance SIBs.
Publisher: Wiley
Date: 17-01-2023
Abstract: Aqueous zinc‐ion batteries hold attractive potential for large‐scale energy storage devices owing to their prominent electrochemical performance and high security. Nevertheless, the applications of aqueous electrolytes have generated various challenges, including uncontrolled dendrite growth and parasitic reactions, thereby deteriorating the Zn anode's stability. Herein, inspired by the superior affinity between Zn 2+ and amino acid chains in the zinc finger protein, a cost‐effective and green glycine additive is incorporated into aqueous electrolytes to stabilize the Zn anode. As confirmed by experimental characterizations and theoretical calculations, the glycine additives can not only reorganize the solvation sheaths of hydrated Zn 2+ via partial substitution of coordinated H 2 O but also preferentially adsorb onto the Zn anode, thereby significantly restraining dendrite growth and interfacial side reactions. Accordingly, the Zn anode could realize a long lifespan of over 2000 h and enhanced reversibility (98.8%) in the glycine‐containing electrolyte. Furthermore, the assembled Zn||α‐MnO 2 full cells with glycine‐modified electrolyte also delivers substantial capacity retention (82.3% after 1000 cycles at 2 A g ‐1 ), showing promising application prospects. This innovative bio‐inspired design concept would inject new vitality into the development of aqueous electrolytes.
Publisher: Elsevier BV
Date: 12-2022
Publisher: American Chemical Society (ACS)
Date: 16-10-2018
Publisher: American Chemical Society (ACS)
Date: 02-05-2023
DOI: 10.1021/JACS.3C03039
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3EE00658A
Abstract: Reunderstanding the faradaic reaction mechanism at the electrode/electrolyte interface from the specific adsorption of solvation structures towards advanced aqueous Zn–Mn batteries.
Publisher: American Chemical Society (ACS)
Date: 28-08-2013
DOI: 10.1021/NL402741J
Abstract: High-quality metal oxide/conducting polymer (CP) heterostructured nanoarrays are fabricated by controllable electrochemical polymerization of CP shells on preformed metal oxides nanostructures for both electrochromic and electrochemical energy storage applications. Coaxial and branched CP shells can be obtained on different backbones (nanowire, nanorod, and nanoflake) simply by controlling the electrodeposition time. "Solvophobic" and "electrostatic" interactions are proposed to account for the preferential growth of CP along metal oxides to form core/shell heterostructures. The coaxial TiO2 olyaniline core/shell nanorod arrays exhibit remarkable electrochromic performance with rich color changes, fast optical modulation, and superior cycling stability. In addition, the Co3O4 olyaniline core/shell nanowire arrays are evaluated as an anode material of Li ion battery and exhibit enhanced electrochemical property with higher and more stable capacity than the bare Co3O4 nanowires electrode. These unique organic-inorganic heterostructures with synergy pave the way for developing new functional materials with enhanced properties or new applications.
Publisher: American Chemical Society (ACS)
Date: 25-07-2023
Publisher: American Chemical Society (ACS)
Date: 05-07-2022
Publisher: Elsevier BV
Date: 02-2016
Publisher: Wiley
Date: 17-09-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1EE03547A
Abstract: We propose an objective Mn-based competitive capacity evolution protocol and a recusing strategy for dead Mn-based Zn-ion batteries. The findings would provide new insights to understand the electrochemical behaviors more comprehensively.
Publisher: Wiley
Date: 13-02-2018
Abstract: Electrocatalytic performance can be enhanced by engineering a purposely designed nanoheterojunction and fine‐tuning the interface electronic structure. Herein a new approach of developing atomic epitaxial in‐growth in Co‐Ni 3 N nanowires array is devised, where a nanoconfinement effect is reinforced at the interface. The Co‐Ni 3 N heterostructure array is formed by thermal annealing NiCo 2 O 4 precursor nanowires under an optimized condition, during which the nanowire morphology is retained. The epitaxial in‐growth structure of Co‐Ni 3 N at nanometer scale facilitates the electron transfer between the two different domains at the epitaxial interface, leading to a significant enhancement in catalytic activities for both hydrogen and oxygen evolution reactions (10 and 16 times higher in the respective turn‐over frequency compared to Ni 3 N‐alone nanorods). The interface transfer effect is verified by electronic binding energy shift and density functional theory (DFT) calculations. This nanoconfinement effect occurring during in situ atomic epitaxial in‐growth of the two compatible materials shows an effective pathway toward high‐performance electrocatalysis and energy storages.
Publisher: Elsevier BV
Date: 04-2012
Publisher: IOP Publishing
Date: 25-09-2017
Abstract: Two-dimensional transition metal dichalcogenides are widely studied as anode materials for metal ion batteries. This application requires high electric conductivity which can be achieved by forming composites with conductive carbon. In this work, we demonstrate the creation of nanospheres composed of Mo-based thin nanosheets (MoS
Publisher: Elsevier BV
Date: 10-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0RA03022H
Abstract: We synthesized the hierarchical porous LiNi 1/3 Co 1/3 Mn 1/3 O 2 nano-/microspheres with yolk–shell-like architecture, showing stable cycling performance and outstanding rate capability.
Publisher: Wiley
Date: 09-10-2018
Abstract: Tin and its derivatives have provoked tremendous progress of high-capacity sodium-ion anode materials. However, achieving high areal and volumetric capability with maintained long-term stability in a single electrode remains challenging. Here, an elegant and versatile strategy is developed to significantly extend the lifespan and rate capability of tin sulfide nanobelt electrodes while maintaining high areal and volumetric capacities. In this strategy, in situ bundles of robust hierarchical graphene (hG) are grown uniformly on tin sulfide nanobelt networks through a rapid (5 min) carbon-plasma method with sustainable oil as the carbon source and the partially reduced Sn as the catalyst. The nucleation of graphene, CN (with size N ranging from 1 to 24), on the Sn(111) surface is systematically explored using density functional theory calculations. It is demonstrated that this chemical-bonded hG strategy is powerful in enhancing overall electrochemical performance.
Publisher: Wiley
Date: 21-12-2023
Abstract: It remains challenging to achieve further breakthroughs in the development of durable bifunctional air cathode electrocatalysts for increasing the cycling life of rechargeable Zn‐air battery (RZAB). Herein, d‐band gap narrowing strategy is proposed to significantly boost the electrocatalytic activity and stability of spinel Co 3 O 4 for both oxygen reduction and evolution reactions. In situ Raman spectroscopy finds that the Ce atom substitution can significantly improve the durability and corrosion resistance of electrocatalysts in harsh alkaline electrolytes. Synchrotron X‐ray absorption fine structure reveals that the Co 3+ /Co 2+ ratio of Co 3 O 4 can be tuned with Ce introduction, which is beneficial to optimize the adsorption/desorption of the intermediates over Co oh 3+ active sites. Density functional theory calculations further confirm the reduced gap between Co d‐band and O p‐band centers, increased electrical conductivity, together with the deepened valence band maximum of Co sites in Ce‐doped Co 3 O 4 . Thereby, the optimized RZAB with Ce‐Co 3 O 4 delivers excellent long‐term durability (290 h) and large specific capacity (876.3 ), which possesses great prospects in all‐solid‐state flexible RZAB devices.
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2TA04592C
Abstract: A crumpled MXene/MoS 2 heterostructure provides multidirectional diffusion pathways for electrolyte permeability to modulate lithium–ion diffusion, achieving a competitive permeability performance of 18.8 L m −2 h −1 bar −1 in the functional separator.
Publisher: Elsevier BV
Date: 12-2019
Publisher: Wiley
Date: 23-01-2018
Publisher: American Association for the Advancement of Science (AAAS)
Date: 14-10-2022
Abstract: The diffusion-limited aggregation (DLA) of metal ion (M n+ ) during the repeated solid-to-liquid (StoL) plating and liquid-to-solid (LtoS) stripping processes intensifies fatal dendrite growth of the metallic anodes. Here, we report a new solid-to-solid (StoS) conversion electrochemistry to inhibit dendrites and improve the utilization ratio of metals. In this StoS strategy, reversible conversion reactions between sparingly soluble carbonates (Zn or Cu) and their corresponding metals have been identified at the electrode/electrolyte interface. Molecular dynamics simulations confirm the superiority of the StoS process with accelerated anion transport, which eliminates the DLA and dendrites in the conventional LtoS/StoL processes. As proof of concept, 2ZnCO 3 ·3Zn(OH) 2 exhibits a high zinc utilization of ca. 95.7% in the asymmetry cell and 91.3% in a 2ZnCO 3 ·3Zn(OH) 2 || Ni-based full cell with 80% capacity retention over 2000 cycles. Furthermore, the designed 1-Ah pouch cell device can operate stably with 500 cycles, delivering a satisfactory total energy density of 135 Wh kg −1 .
Publisher: Wiley
Date: 20-02-2017
Publisher: Elsevier BV
Date: 06-2019
Publisher: Wiley
Date: 22-09-2017
Abstract: Hybrid metal-ion capacitors (MICs) (M stands for Li or Na) are designed to deliver high energy density, rapid energy delivery, and long lifespan. The devices are composed of a battery anode and a supercapacitor cathode, and thus become a tradeoff between batteries and supercapacitors. In the past two decades, tremendous efforts have been put into the search for suitable electrode materials to overcome the kinetic imbalance between the battery-type anode and the capacitor-type cathode. Recently, some transition-metal compounds have been found to show pseudocapacitive characteristics in a nonaqueous electrolyte, which makes them interesting high-rate candidates for hybrid MIC anodes. Here, the material design strategies in Li-ion and Na-ion capacitors are summarized, with a focus on pseudocapacitive oxide anodes (Nb
Publisher: Wiley
Date: 25-09-2022
Abstract: Graphite has been widely accepted for its reversible solvated sodium cointercalation mechanism into the graphite layers in ether‐based electrolytes. However, the cointercalation suffers from insufficient Coulombic efficiency with high redox potentials, which significantly limits its energy output. Herein, instead of the conventional solvated Na + cointercalation into the graphite, a new coadsorptive mechanism is proposed through the microcrystalline graphite fiber (MCGF), which can reversibly store the solvated Na + at the ribboned grain boundaries and in the mesopores of the MCGF. The mechanism is manifested by various advanced spectroscopy techniques, including in situ synchrotron small‐angle X‐ray scattering to track the long‐periodic structure evolution and ex situ synchrotron X‐ray absorption fine structure to verify the interaction of solvated Na and graphite layers. The origin of the boosted rate‐capability and reversibility is further revealed by density functional theory simulations and aberration‐corrected transmission electron microscopy. As a proof‐of‐concept, the MCGF electrode exhibits high initial coulombic efficiency (92.5%), fast‐charging (within 4 min), and enhanced cycling stability (≈98% retention after 800 cycles). The results provide a new understanding of the sodium storage mechanism in graphite‐based materials, which may inspire further exploration of carbon electrodes for Na‐ion batteries.
Publisher: American Chemical Society (ACS)
Date: 14-07-2017
Publisher: Springer Science and Business Media LLC
Date: 30-06-2016
DOI: 10.1038/NCOMMS12122
Abstract: Sodium-ion batteries are a potentially low-cost and safe alternative to the prevailing lithium-ion battery technology. However, it is a great challenge to achieve fast charging and high power density for most sodium-ion electrodes because of the sluggish sodiation kinetics. Here we demonstrate a high-capacity and high-rate sodium-ion anode based on ultrathin layered tin(II) sulfide nanostructures, in which a maximized extrinsic pseudocapacitance contribution is identified and verified by kinetics analysis. The graphene foam supported tin(II) sulfide nanoarray anode delivers a high reversible capacity of ∼1,100 mAh g −1 at 30 mA g −1 and ∼420 mAh g −1 at 30 A g −1 , which even outperforms its lithium-ion storage performance. The surface-dominated redox reaction rendered by our tailored ultrathin tin(II) sulfide nanostructures may also work in other layered materials for high-performance sodium-ion storage.
Publisher: Elsevier BV
Date: 08-2016
Publisher: American Chemical Society (ACS)
Date: 12-03-2021
Publisher: Wiley
Date: 05-08-2018
Publisher: The Electrochemical Society
Date: 2019
DOI: 10.1149/2.0381903JES
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CS00705A
Abstract: A thorough review on combined computational and experimental approaches to develop TMD-based highly efficient electrocatalysts by site doping, phase modulation, control of growth morphology and construction of heterostructures.
Publisher: Elsevier BV
Date: 12-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA04959A
Abstract: Well dispersed Cu 3 P dots embedded in a C matrix giving high Li-ion storage activity, improved electronic conductivity and stability are induced via a self-adaptive electrochemical reconstruction upon cycling, which triggers exceptional performance.
Publisher: Elsevier BV
Date: 09-2018
Publisher: Wiley
Date: 14-02-2020
Publisher: Wiley
Date: 02-07-2018
Abstract: Zinc-ion batteries are under current research focus because of their uniqueness in low cost and high safety. However, it is still desirable to improve the rate performance by improving the Zn
Publisher: American Chemical Society (ACS)
Date: 08-10-2021
DOI: 10.1021/JACS.1C06255
Publisher: American Chemical Society (ACS)
Date: 04-05-2022
DOI: 10.1021/ACS.NANOLETT.2C01235
Abstract: Zn-based aqueous batteries (ZABs) have been regarded as promising candidates for safe and large-scale energy storage in the "post-Li" era. However, kinetics and stability problems of Zn capture cannot be concomitantly regulated, especially at high rates and loadings. Herein, a hierarchical confinement strategy is proposed to design zincophilic and spatial traps through a host of porous Co-embedded carbon cages (denoted as CoCC). The zincophilic Co sites act as preferred nucleation sites with low nucleation barriers (within 0.5 mA h cm
Publisher: Elsevier BV
Date: 07-2017
Publisher: Elsevier BV
Date: 2018
Publisher: Wiley
Date: 02-06-2014
Abstract: A thin polymer shell helps V2O5 a lot. Short V2O5 nanobelts are grown directly on 3D graphite foam as a lithium-ion battery (LIB) cathode material. A further coating of a poly(3,4-ethylenedioxythiophene) (PEDOT) thin shell is the key to the high performance. An excellent high-rate capability and ultrastable cycling up to 1000 cycles are demonstrated.
Publisher: Elsevier BV
Date: 02-2020
Publisher: Elsevier BV
Date: 10-2015
Publisher: Springer Science and Business Media LLC
Date: 12-07-2022
Publisher: American Chemical Society (ACS)
Date: 26-12-2014
DOI: 10.1021/NL504038S
Abstract: Nanoscale surface engineering is playing important role in enhancing the performance of battery electrode. VO2 is one of high-capacity but less-stable materials and has been used mostly in the form of powders for Li-ion battery cathode with mediocre performance. In this work, we design a new type of binder-free cathode by bottom-up growth of biface VO2 arrays directly on a graphene network for both high-performance Li-ion and Na-ion battery cathodes. More importantly, graphene quantum dots (GQDs) are coated onto the VO2 surfaces as a highly efficient surface "sensitizer" and protection to further boost the electrochemical properties. The integrated electrodes deliver a Na storage capacity of 306 mAh/g at 100 mA/g, and a capacity of more than 110 mAh/g after 1500 cycles at 18 A/g. Our result on Na-ion battery may pave the way to next generation postlithium batteries.
Publisher: Wiley
Date: 14-10-2021
Abstract: Among the various VO 2 polymorphs, the layered compound, VO 2 (B), has been the most widely investigated lithium‐ion battery electrode material. For sodium‐ion electrodes, however, an amorphous solid may be more advantageous as a result of the open framework to facilitate ion insertion and the ability to tolerate volumetric changes. Herein, it is shown that the Na + insertion properties of amorphous VO 2 (a‐VO 2 ) are superior to those of crystalline VO 2 (B). Amorphous VO 2 exhibits a linear voltage characteristic over a 3 V range (4.0 to 1.0 V vs Na/Na + ) leading to a reversible capacity as high as 400 mAh g −1 and rapid redox kinetics, which is attributed to its pseudocapacitive nature. The linear voltage characteristic over 3 V affords the opportunity of fabricating a symmetric Na‐ion battery in which the a‐VO 2 material serves as both the positive electrode and the negative electrode. Such a symmetric battery offers safer operation in terms of overcharging, overdischarging, polarity reversal, high charge/discharge current abuse, and long‐term usage. The results suggest that amorphous transition metal oxides may offer advantageous attributes for rapid, safe, and energy‐dense storage.
Publisher: Wiley
Date: 17-09-2020
Publisher: American Chemical Society (ACS)
Date: 27-10-2023
DOI: 10.1021/JACS.3C08986
Publisher: Wiley
Date: 06-09-2022
Abstract: Despite a promising outlook due to the intrinsic low cost and high safety, the practical application of aqueous Zn‐ion battery is impeded by the severe mutual problems of cathode dissolution, electrolyte parasitic reactions, and metallic anode dendrite growth. Herein, a triple‐functional strategy is proposed that a polyoxovanadate (POV) cluster of K 10 [V IV 16 V V 18 O 82 ] as a promising Zn 2+ host can concomitantly stabilize the cluster cathode, aqueous electrolyte, and metallic Zn anode. An in situ generated cathode electrolyte interface via anodic oxidation is identified as effective in preventing the dissolution of POV cathode. Molecular dynamics simulation and density functional theory calculation confirm that the [V IV 16 V V 18 O 82 ] 10− polyoxoanions can synergistically suppress electrolyte side reactions by modulating the primary solvation shell of Zn 2+ ‐6H 2 O, and random anode dendrite growth by in situ constructing a stable solid electrolyte interface of Zn‐POV. As a result, the Zn//POV battery exhibits unprecedented cycling durability over 10 000 cycles at high rates of 5 and 12 A g −1 . In a systematic consideration, the findings enlighten the origin of triple‐functional polyoxometalates and will significantly propel the practical development of aqueous batteries.
Publisher: Elsevier BV
Date: 12-2011
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4NR00024B
Abstract: Various solution-based synthesis methods for common metal oxide nanostructures and associated reaction mechanisms are reviewed.
Publisher: American Chemical Society (ACS)
Date: 20-02-2014
DOI: 10.1021/NL5001778
Abstract: We attempt to meet the general design requirements for high-performance supercapacitor electrodes by combining the strategies of lightweight substrate, porous nanostructure design, and conductivity modification. We fabricate a new type of 3D porous and thin graphite foams (GF) and use as the light and conductive substrates for the growth of metal oxide core/shell nanowire arrays to form integrated electrodes. The nanowire core is Co3O4, and the shell is a composite of conducting polymer (poly(3,4-ethylenedioxythiophene), PEDOT) and metal oxide (MnO2). To show the advantage of this integrated electrode design (viz., GF + Co3O4/PEDOT-MnO2 core/shell nanowire arrays), three other different less-integrated electrodes are also prepared for comparison. Full supercapacitor devices based on the GF + Co3O4/PEDOT-MnO2 as positive electrodes exhibit the best performance compared to other three counterparts due to an optimal design of structure and a synergistic effect.
Publisher: Wiley
Date: 11-09-2015
Publisher: Springer Science and Business Media LLC
Date: 17-05-1970
DOI: 10.1038/SREP25771
Abstract: Although being considered as one of the most promising cathode materials for Lithium-ion batteries (LIBs), LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM) is currently limited by its poor rate performance and cycle stability resulting from the thermodynamically favorable Li + /Ni 2+ cation mixing which depresses the Li + mobility. In this study, we developed a two-step method using fluffy MnO 2 as template to prepare hierarchical porous nano-/microsphere NCM (PNM-NCM). Specifically, PNM-NCM microspheres achieves a high reversible specific capacity of 207.7 mAh g −1 at 0.1 C with excellent rate capability (163.6 and 148.9 mAh g −1 at 1 C and 2 C), and the reversible capacity retention can be well-maintained as high as 90.3% after 50 cycles. This excellent electrochemical performance is attributed to unique hierarchical porous nano-/microsphere structure which can increase the contact area with electrolyte, shorten Li + diffusion path and thus improve the Li + mobility. Moreover, as revealed by XRD Rietveld refinement analysis, a negligible cation mixing (1.9%) and high crystallinity with a well-formed layered structure also contribute to the enhanced C-rates performance and cycle stability. On the basis of our study, an effective strategy can be established to reveal the fundamental relationship between the structure/chemistry of these materials and their properties.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA23228K
Abstract: A new nitrogen-doped graphene-coated graphite anode achieved a high reversible capacity, surpassing the theoretical value for graphite. The reported scalable synthesis method may also be applied to other anode systems.
Publisher: American Chemical Society (ACS)
Date: 23-09-2021
Publisher: Wiley
Date: 25-11-2014
Publisher: American Chemical Society (ACS)
Date: 27-09-2021
Publisher: Chinese Chemical Society
Date: 05-09-2022
Publisher: Wiley
Date: 29-05-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 02-04-2014
DOI: 10.1039/C4NR01119H
Abstract: A novel three-dimensional (3D) metal/metal oxide core/branch array electrode has been fabricated as a supercapacitor electrode. Hollow Ni nanocorn arrays are constructed on Ni foams and act as a highly conductive and stable support to Co3O4 nanoflakes. Enhanced pseudocapacitive performance compared to bare Co3O4 nanosheets is demonstrated with high rate capability and excellent cycling stability.
Publisher: Wiley
Date: 24-09-2014
Abstract: Honeycomb-like MoS2 nanoarchitectures anchored into 3D graphene foam are successfully fabricated as a high-performance positive electrode for enhanced Li-ion storage. The unique 3D interpenetrating honeycomb-like structure is the key to the high performance. High reversible capacity, superior high-rate capability, and excellent cycling stability are demonstrated.
Publisher: Elsevier BV
Date: 12-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5EE00339C
Abstract: Hierarchical TiC hollow branched fibres are synthesized and demonstrate high-rate supercapacitor energy storage with remarkable wide-temperature specific capacitance and excellent cycling stability.
Publisher: Elsevier BV
Date: 10-2014
Publisher: Wiley
Date: 31-12-2020
Publisher: Wiley
Date: 02-05-2019
Abstract: Zinc-based electrochemistry is attracting significant attention for practical energy storage owing to its uniqueness in terms of low cost and high safety. However, the grid-scale application is plagued by limited output voltage and inadequate energy density when compared with more conventional Li-ion batteries. Herein, we propose a latent high-voltage MnO
Publisher: Springer Science and Business Media LLC
Date: 03-01-2023
DOI: 10.1038/S41467-022-35617-3
Abstract: Sodium-ion storage technologies are promising candidates for large-scale grid systems due to the abundance and low cost of sodium. However, compared to well-understood lithium-ion storage mechanisms, sodium-ion storage remains relatively unexplored. Herein, we systematically determine the sodium-ion storage properties of anatase titanium dioxide (TiO 2 (A)). During the initial sodiation process, a thin surface layer (~3 to 5 nm) of crystalline TiO 2 (A) becomes amorphous but still undergoes Ti 4+ /Ti 3+ redox reactions. A model explaining the role of the amorphous layer and the dependence of the specific capacity on the size of TiO 2 (A) nanoparticles is proposed. Amorphous nanoparticles of ~10 nm seem to be optimum in terms of achieving high specific capacity, on the order of 200 mAh g −1 , at high charge/discharge rates. Kinetic studies of TiO 2 (A) nanoparticles indicate that sodium-ion storage is due to a surface-redox mechanism that is not dependent on nanoparticle size in contrast to the lithiation of TiO 2 (A) which is a diffusion-limited intercalation process. The surface-redox properties of TiO 2 (A) result in excellent rate capability, cycling stability and low overpotentials. Moreover, tailoring the surface-redox mechanism enables thick electrodes of TiO 2 (A) to retain high rate properties, and represents a promising direction for high-power sodium-ion storage.
Publisher: Wiley
Date: 18-03-2023
Abstract: Poor thermodynamic stability and sluggish electrochemical kinetics of metallic Zn anode in aqueous solution greatly h er its practical application. To solve such problems, to date, various zincophilic surface modification strategies are developed, which can facilitate reversible Zn plating/stripping behavior. However, there is still a lack of systematic and fundamental understanding regarding the metrics of thermodynamics inertia and kinetics zincophilia in selecting zincophilic sites. Herein, hetero‐metallic interfaces are prioritized for the first time via optimizing different hetero metals (Fe, Co, Ni, Sn, Bi, Cu, Zn, etc.) and synthetic solvents (ethanol, ethylene glycol, n ‐propanol, etc.). Specifically, both theoretical simulations and experimental results suggest that this Bi@Zn interface can exhibit high efficiency owing to the thermodynamics inertia and kinetics zincophilia. A best practice for prioritizing zincophilic sites in a more practical metric is also proposed. As a proof of concept, the Bi@Zn anode delivers ultralow overpotential of ≈55 mV at a high rate of 10 mA cm −2 and stable cycle life over 4700 cycles. The elaborated “thermodynamics inertia and kinetics metalphilia” metrics for hetero‐metallic interfaces can benchmark the success of other metal‐based batteries.
Publisher: Wiley
Date: 08-07-2015
Abstract: Two metal nitrides, TiN porous layers and Fe2 N nanoparticles, are grown uniformly with the assistance of atomic layer deposition on vertically aligned graphene nanosheets and used as the cathode and anode for solid-state supercapacitors, respectively. Full cells are constructed and show good flexibility, high-rate capability, and 98% capacitance retention after 20,000 cycles.
Publisher: Oxford University Press (OUP)
Date: 25-11-2022
DOI: 10.1093/NSR/NWAC268
Abstract: Sulfur-based aqueous batteries (SABs) are deemed promising candidates for safe, low-cost, and high-capacity energy storage. However, despite their high theoretical capacity, achieving high reversible value remains a great challenge due to the thermodynamic and kinetics problems of elemental sulfur. Here, the reversible six-electron redox electrochemistry is constructed by activating the sulfur oxidation reaction (SOR) process of the elaborate mesocrystal NiS2 (M-NiS2). Through the unique 6e− solid-to-solid conversion mechanism, SOR efficiency can reach an unprecedented degree of ca. 96.0%. The SOR efficiency is further revealed to be closely associated with the kinetics feasibility and thermodynamic stability of the M-NiS2 intermedium in the formation of elemental sulfur. Benefiting from the boosted SOR, compared with the bulk electrode, the M-NiS2 electrode exhibits a high reversible capacity (1258 mAh g−1), ultrafast reaction kinetics (932 mAh g−1 at 12 A g−1), and long-term cyclability (2000 cycles at 20 A g−1). As a proof of concept, a new M-NiS2‖Zn hybrid aqueous battery exhibits an output voltage of 1.60 V and an energy density of 722.4 Wh kgcath−1, which opens a new opportunity for the development of high-energy aqueous batteries.
Publisher: Elsevier BV
Date: 02-2021
Publisher: Elsevier BV
Date: 06-2023
Publisher: IOP Publishing
Date: 13-01-2015
Publisher: Springer Science and Business Media LLC
Date: 22-09-2022
Publisher: Wiley
Date: 29-03-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1TA10588D
Abstract: Study of non-graphite carbon materials for sodium ion batteries. A structure–property relationship database was analyzed and applied with machine learning.
Publisher: Wiley
Date: 24-02-2021
Publisher: Elsevier BV
Date: 10-2016
Publisher: Wiley
Date: 27-10-2015
Publisher: Wiley
Date: 26-05-2023
Abstract: Electroepitaxy is recognized as an effective approach to prepare metal electrodes with nearly complete reversibility. Nevertheless, large‐scale manipulation is still not attainable owing to complicated interfacial chemistry. Here, the feasibility of extending Zn electroepitaxy toward the bulk phase over a mass‐produced mono‐oriented Cu(111) foil is demonstrated. Interfacial Cu–Zn alloy and turbulent electroosmosis are circumvented by adopting a potentiostatic electrodeposition protocol. The as‐prepared Zn single‐crystalline anode enables stable cycling of symmetric cells at a stringent current density of 50.0 mA cm −2 . The assembled full cell further sustaines a capacity retention of 95.7% at 5.0 A g −1 for 1500 cycles, accompanied by a controllably low N/P ratio of 7.5. In addition to Zn, Ni electroepitaxy can be realized by using the same approach. This study may inspire rational exploration of the design of high‐end metal electrodes.
Publisher: Wiley
Date: 19-05-2020
Publisher: Elsevier BV
Date: 08-2013
Publisher: American Chemical Society (ACS)
Date: 18-09-2023
Publisher: American Chemical Society (ACS)
Date: 25-10-2016
Abstract: The abundant reserve and low cost of sodium have provoked tremendous evolution of Na-ion batteries (SIBs) in the past few years, but their performances are still limited by either the specific capacity or rate capability. Attempts to pursue high rate ability with maintained high capacity in a single electrode remains even more challenging. Here, an elaborate self-branched 2D SnS
Publisher: Wiley
Date: 17-08-2023
DOI: 10.1002/CEY2.261
Abstract: The development of highly safe and low‐cost aqueous batteries is of great significance in the background of carbon neutrality. However, the practical deployment of aqueous batteries has been plagued due to their relatively low capacity and poor cycling stability. Herein, we propose unique conversion electrochemistry of copper selenides for robust and energetic aqueous charge storage. In situ X‐ray diffraction and operando Raman techniques reveal a reversible transformation from CuSe to Cu 2 Se through the intermediates of Cu 3 Se 2 and Cu 1.8 Se. Such a conversion process activates the redox carrier of Cu 2+ ion and delivers a remarkable rate capability of 285 mAh g −1 at 20 A g −1 and electrochemical durability up to 30,000 cycles. Furthermore, Cu 2+ and H + coinsertion chemistry is proposed to facilitate the conversion process. As a proof‐of‐concept, a hybrid aqueous pouch cell coupling CuSe//Zn is capable of affording maximum energy and power densities of 190 Wh kg –1 and 1366 W kg −1 , respectively.
Publisher: Elsevier BV
Date: 09-2022
Publisher: Wiley
Date: 21-12-2020
Publisher: Elsevier BV
Date: 12-2014
Publisher: Wiley
Date: 03-10-2022
Abstract: Rechargeable aqueous zinc‐ion batteries are considered as ideal candidates for large‐scale energy storage due to their high safety, eco‐friendliness, and low cost. However, Zn anode invites dendrite growth and parasitic reactions at anode‐electrolyte interface, impeding the practical realization of the battery. In this study, the electrochemical performance of the Zn‐metal anode is proposed to improve by using a 3D ZnTe semiconductor substrate. The substrate features high zincophilicity, high electronic conductivity and electron affinity, and a low Zn nucleation energy barrier to promote dendrite‐proof Zn deposition along the (002) crystal plane, while it also maintains high chemical stability against parasitic metal corrosion and hydrogen evolution reactions at surface, and a stable skeleton structure against the volume variation of anode. A Zn‐metal anode based on the telluride substrate shows a long cycle life of over 3300 h with a small voltage hysteresis of 48 and 320 mV at 1 and 30 mA cm −2 , respectively. A zinc telluride@Zn//MnO 2 full cell can operate for over 500 cycles under practical conditions in terms of lean electrolyte (18 µL mAh −1 ) and limited Zn metal ( negative ositive capacity ratio of 3:1, and a high mass loading of the cathode.
Publisher: American Chemical Society (ACS)
Date: 03-05-2023
Publisher: American Chemical Society (ACS)
Date: 12-09-2021
DOI: 10.1021/JACS.1C06923
Publisher: Research Square Platform LLC
Date: 12-07-2022
DOI: 10.21203/RS.3.RS-1804618/V1
Abstract: Sodium-ion storage technologies are promising candidates for large-scale grid systems owing to the abundance and low cost of sodium. However, compared to well-understood lithium-ion storage mechanisms, sodium-ion storage remains relatively unexplored. Herein, we systematically determine the sodium-ion storage properties of anatase titanium dioxide (TiO2(A)). During the initial sodiation process, a thin surface layer (~3 to 5 nm) of crystalline TiO2(A) becomes amorphous but still undergoes Ti4+/Ti3+ redox reactions. A model explaining the role of the amorphous layer and the dependence of the specific capacity on the size of TiO2(A) nanoparticles is proposed. Amorphous nanoparticles of ~10 nm seem to be optimum in terms of achieving high specific capacity, on the order of 200 mAh g-1, at high charge/discharge rates. Kinetic studies of TiO2(A) nanoparticles indicate that sodium-ion storage is due to a surface-redox, capacitor-like reaction mechanism that is not dependent on nanoparticle size in contrast to the lithiation of TiO2(A) which is a diffusion-limited intercalation process. The surface-redox properties of TiO2(A) result in excellent rate capability, cycling stability and low overpotentials. Moreover, the surface-redox mechanism is instrumental in enabling thick electrodes of TiO2(A) retain high rate properties, and represent a promising direction for high-power sodium-ion storage.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA02888A
Abstract: In this work is reported the successful synthesis of 1D nanobar-like LiNi 0.4 Co 0.2 Mn 0.4 O 2 (N-NCM), preferentially exposing the {010} electrochemically active facets.
Publisher: Wiley
Date: 05-2023
Abstract: The current research of Li–S batteries primarily focuses on increasing the catalytic activity of electrocatalysts to inhibit the polysulfide shuttling and enhance the redox kinetics. However, the stability of electrocatalysts is largely neglected, given the premise that they are stable over extended cycles. Notably, the reconstruction of electrocatalysts during the electrochemical reaction process has recently been proposed. Such in situ reconstruction process inevitably leads to varied electrocatalytic behaviors, such as catalytic sites, selectivity, activity, and amounts of catalytic sites. Therefore, a crucial prerequisite for the design of highly effective electrocatalysts for Li–S batteries is an in‐depth understanding of the variation of active sites and the influence factors for the in situ reconstruction behaviors, which has not achieved a fundamental understanding and summary. This review comprehensively summarizes the recent advances in understanding the reconstruction behaviors of different electrocatalysts for Li–S batteries during the electrochemical reaction process, mainly including metal nitrides, metal oxides, metal selenides, metal fluorides, metals/alloys, and metal sulfides. Moreover, the unexplored issues and major challenges of understanding the reconstruction chemistry are summarized and prospected. Based on this review, new perspectives are offered into the reconstruction and true active sites of electrocatalysts for Li–S batteries.
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3RA22673E
Start Date: 2020
End Date: 10-2020
Amount: $417,276.00
Funder: Australian Research Council
View Funded Activity