ORCID Profile
0000-0002-5390-8763
Current Organisations
University of New South Wales
,
Khalifa University of Science and Technology
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Aerospace Materials | Composite and Hybrid Materials | Materials Engineering
Expanding Knowledge in Engineering | Manufacturing not elsewhere classified |
Publisher: Elsevier BV
Date: 11-2012
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA01344A
Abstract: The harmful pulverization and ensuing poor cyclic stability of Si anodes are successfully addressed by mesoporous Si/C microspheres with greatly reduced volume expansion.
Publisher: Wiley
Date: 31-10-2022
Abstract: Owing to the moderate redox potential and high safety, Zn metal anodes have been garnering great attention. However, the poor reversibility and limited‐service period caused by side reactions and dendrites hinder their applications. Here, a novel anode material consisting of a hexagonal 1T‐Vanadium diselenide (1T‐VSe 2 ) film on graphene is developed as a zincophilic template to epitaxially electrodeposit hexagonal closest packed Zn to replace the conventional metal substrates in Zn batteries. The 1T‐VSe 2 /Zn anode induces a horizontally (002)‐oriented plate‐like Zn crystal deposition morphology instead of randomly oriented grains that prompts the compact Zn deposition. According to density functional theory calculations, the VSe 2 substrate exhibits a higher Zn adsorption (−0.54 eV) than the graphene (−0.38 eV) or neat Zn (−0.48 eV) counterparts, leading to the enhanced zincophilicity and a lower nucleation overpotential, in agreement with the experimental results. The force field‐based molecular dynamics simulations visualize Zn nucleation and morphological evolution at the atomistic level. The rapid adatom diffusion on VSe 2 leads to layer‐by‐layer Zn electrodeposits with higher fraction of the (002) facets to effectively prohibit dendrite formation. The symmetric cell with 1T‐VSe 2 /Zn delivers an ultra‐stable cyclic life of 2500 h with 50 mV overpotential at 1 mA cm −2 and 1 mAh cm −2 .
Publisher: Wiley
Date: 25-06-2018
Publisher: Elsevier BV
Date: 08-2009
DOI: 10.1016/J.JCIS.2009.04.005
Abstract: A novel route is proposed to produce graphite nanoplatelets (GNPs) and graphene sheets. The natural graphite flakes were directly exfoliated by ultrasonication in formic acid. A stable graphene aqueous dispersion was obtained using the as-produced GNPs after two processing steps: (i) chemical oxidation of GNPs to graphite oxide nanoplatelets (GONPs) and (ii) chemical reduction of graphite oxide nanoplatelets to graphene. The total duration for oxidation and production of stable graphite oxide colloid was significantly shortened due to the use of exfoliated GNPs with large surface area. The work proposed here has several advantages over the previous methods, including a high efficiency of exfoliation process, the use of a non-toxic, environmental-friendly intercalant and the capability for mass production of graphene for industrial applications.
Publisher: Elsevier BV
Date: 07-2014
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9TA11913B
Abstract: A dual-phase MoS 2 with expanded interlayer distance is fabricated for sodium storage. The dual-phase MoS 2 shows significantly improved electrical conductivity and enhanced Na + diffusivity compared to the common 2H-MoS 2 .
Publisher: Elsevier BV
Date: 09-2008
Publisher: Elsevier BV
Date: 03-2014
Publisher: IOP Publishing
Date: 14-01-2008
DOI: 10.1088/0957-4484/19/05/055708
Abstract: The major objectives of this work are to understand the effects of organoclay, its extent of exfoliation and orientation, and indenter geometry on the scratch characteristics of polyamide 6/organoclay nanocomposites. Two different organically treated clays are used for this purpose and their structural parameters in a polyamide 6 matrix quantified. It is shown that, while the material properties are important for scratching resistance, they are not the only determinants of the scratch performance of materials. Further, despite proving beneficial to scratch resistance, in terms of residual depth, the presence (and exfoliation) of organoclay promotes the formation of brittle cracks during scratching. But with no organoclay layers, plastic flow controls the scratch damage in neat polyamide 6 with large residual depths. Factors such as orientation of clay layers and variations of indenter tip geometry also exert dominant effects on scratch penetration resistance and damage. Additionally, significant plastic flow and rotation of organoclay layers from the original configuration are observed underneath the sliding indenter.
Publisher: Elsevier BV
Date: 1997
Publisher: American Chemical Society (ACS)
Date: 28-06-2011
DOI: 10.1021/NN2018683
Abstract: Monolayer graphene oxide (GO) sheets with sizes ranging from a few to ∼200 μm are synthesized based on a chemical method and are sorted out to obtain four different grades having uniform sizes. Transparent conductive films are produced using the ultralarge graphene oxide (UL-GO) sheets that are deposited layer-by-layer on a substrate using the Langmuir-Blodgett (LB) assembly technique. The density and degree of wrinkling of the UL-GO monolayers are turned from dilute, close-packed flat UL-GO to graphene oxide wrinkles (GOWs) and concentrated graphene oxide wrinkles (CGOWs) by varying the LB processing conditions. The method demonstrated here opens up a new avenue for high-yield fabrication of GOWs or CGOWs that are considered promising materials for hydrogen storage, supercapacitors, and nanomechanical devices. The films produced from UL-GO sheets with a close-packed flat structure exhibit exceptionally high electrical conductivity and transparency after thermal reduction and chemical doping treatments. A remarkable sheet resistance of ∼500 Ω/sq at 90% transparency is obtained, which outperforms the graphene films grown on a Ni substrate by chemical vapor deposition. The technique used in this work to produce transparent conductive UL-GO thin films is facile, inexpensive, and tunable for mass production.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA02916C
Abstract: Cobalt carbonate hydroxide/graphene aerogel and cobalt carbonate/graphene aerogel (CCH/GA and CC/GA) composites are synthesized as supercapacitor electrodes via a one-pot hydrothermal method.
Publisher: Springer Science and Business Media LLC
Date: 16-06-2022
Publisher: Informa UK Limited
Date: 2005
Publisher: Springer Science and Business Media LLC
Date: 14-04-2005
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9NH00532C
Abstract: A strong physical and chemical synergistic adsorption-catalysis-functional effect from FPG was confirmed via comprehensive experiments and theoretical analysis within LSBs.
Publisher: Elsevier BV
Date: 10-2006
Publisher: Springer Science and Business Media LLC
Date: 27-03-2017
Publisher: Elsevier BV
Date: 08-2001
Publisher: Wiley
Date: 14-07-2015
Publisher: Wiley
Date: 12-12-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7MH00984D
Abstract: A CVD-grown high-density 3D multilayer graphene web (MGW) is used as the filler for polymer nanocomposites, delivering exceptional electrical and thermal conductivities with outstanding fracture toughness.
Publisher: Springer Science and Business Media LLC
Date: 2000
Publisher: Springer Science and Business Media LLC
Date: 06-2003
Publisher: Elsevier BV
Date: 08-2007
Publisher: Elsevier BV
Date: 10-2004
Publisher: Elsevier BV
Date: 10-2017
Publisher: Elsevier BV
Date: 04-2016
Publisher: Elsevier BV
Date: 07-2017
Publisher: Informa UK Limited
Date: 2004
Publisher: Elsevier BV
Date: 2015
Publisher: Elsevier BV
Date: 10-2017
Publisher: Elsevier BV
Date: 12-2006
Publisher: Elsevier BV
Date: 2021
Publisher: Wiley
Date: 31-05-2021
Abstract: The electrode–electrolyte interfaces play a critical role in influencing the cyclic stability, Coulombic efficiency, and safety of rechargeable batteries. Although there are many recent efforts for investigating the solid electrolyte interface formed on anodes, much less attention has been paid to examine the cathode–electrolyte interface (CEI) established on cathodes. Understanding of the chemistry, morphology, and structure of CEI layers is still illusive requiring further in‐depth characterization. The cryogenic electron microscopy is used to reveal a 1.1 nm thick CEI layer formed on a flower‐shaped, carbon‐coated Na 3 V 2 (PO 4 ) 3 /C (NVP/C) cathode in ether‐based electrolyte for Na‐ion batteries. The rationally designed NVP/C cathode delivers cyclic stability with a capacity retention of over 88% at 50 mA g −1 after 1600 cycles and an excellent high‐rate capability at up to 3200 mA g −1 . These findings may shed new light on the design of CEI layers to achieve high energy and power densities in rechargeable Na‐ion/metal batteries.
Publisher: Elsevier BV
Date: 06-2000
Publisher: Elsevier BV
Date: 12-2010
Publisher: Elsevier BV
Date: 07-2008
Publisher: Elsevier BV
Date: 12-2010
Publisher: Elsevier BV
Date: 10-2017
Publisher: Elsevier BV
Date: 11-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2EE23145J
Publisher: Elsevier BV
Date: 08-2021
Publisher: Elsevier BV
Date: 10-2013
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA06841K
Abstract: The chemical bonds induced by the ball milling at the heterointerfaces of NiP 3 /CNT composite electrodes enhanced their sodium storage performance.
Publisher: Elsevier BV
Date: 08-2011
Publisher: Elsevier BV
Date: 10-2006
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM33960A
Publisher: Elsevier BV
Date: 08-2011
Publisher: Wiley
Date: 07-11-2017
Publisher: American Chemical Society (ACS)
Date: 09-02-2018
Abstract: Unidirectional graphene aerogels (UGAs) with tunable densities, degrees of alignment, and electrical conductivities are prepared by varying the average size of precursor graphene oxide (GO) sheets between 1.1 and 1596 μm
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8QM00153G
Abstract: Even with the many desirable properties, natural abundance and low cost of α-MnO 2 , its application as an anode in lithium-ion batteries has been limited because of its low intrinsic electrical conductivity and large volume expansion occurring during charge/discharge cycles.
Publisher: Elsevier BV
Date: 08-2015
Publisher: Elsevier BV
Date: 04-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0NH00152J
Abstract: As a two-dimensional layered material with a structure analogous to that of graphene, molybdenum disulfide (MoS 2 ) holds great promise in sodium-ion batteries (SIBs).
Publisher: Wiley
Date: 05-09-2007
Publisher: Elsevier BV
Date: 2012
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NR01440C
Abstract: Porous silicon nanosheets are fabricated and exhibit good capacity and superb cyclability. Molecular dynamics simulation is performed to reveal the capacity-porosity correlation.
Publisher: Elsevier BV
Date: 11-2012
Publisher: Elsevier BV
Date: 02-2000
Publisher: Elsevier BV
Date: 02-2007
Publisher: ASTM International
Date: 1995
DOI: 10.1520/STP14589S
Publisher: American Chemical Society (ACS)
Date: 11-07-2018
Abstract: Hexagonal boron nitride (h-BN) has tremendous potential for dielectric energy storage by rationally assembling with graphene. We report the fabrication of microlaminate composites consisting of alternating reduced graphene oxide (rGO) and h-BN nanosheets embedded in a polyurethane (PU) matrix using a novel, two-step bidirectional freeze casting process. Porous, highly-aligned rGO-PU aerogels having ultrahigh dielectric constants with relatively high dielectric losses and low dielectric strengths are fabricated by initial freeze casting. The losses are suppressed, whereas the dielectric strengths are restored by assembling the porous rGO-PU skeleton with electrically insulating BN-PU tunneling barrier layers in the second freeze casting routine. The ligaments bridging the conductive rGO-PU layers are effectively removed by the BN-PU barrier layers, eliminating the current leakage in the transverse direction. The resultant rGO-PU/BN-PU microlaminate composites deliver a remarkable dielectric constant of 1084 with a low dielectric loss of 0.091 at 1 kHz. By virtue of synergy arising from both the rGO-PU layers with a high dielectric constant and the BN-PU barrier layers with a high dielectric strength, the microlaminate composites present a maximum energy density of 22.7 J/cm
Publisher: Elsevier BV
Date: 2021
Publisher: Elsevier BV
Date: 09-2006
Publisher: Elsevier BV
Date: 07-2005
Publisher: Springer Science and Business Media LLC
Date: 06-2003
Publisher: Elsevier BV
Date: 02-2009
Publisher: IOP Publishing
Date: 1999
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM31308A
Publisher: Elsevier BV
Date: 11-2007
Publisher: Springer Science and Business Media LLC
Date: 11-1993
DOI: 10.1007/BF00365049
Publisher: Elsevier BV
Date: 11-2011
Publisher: Wiley
Date: 05-10-2021
Abstract: A rational approach is proposed to design soft multifunctional sensors capable of detection and discrimination of different physical stimuli. Herein, a flexible multifunctional sensor concurrently detecting and distinguishing minute temperature and pressure stimuli in real time is developed using electrospun carbon nanofiber (CNF) films as the sole sensing material and electrical resistance as the only output signal. The stimuli sensitivity and discriminability are coordinated by tailoring the atomic‐ and device‐level structures of CNF films to deliver outstanding pressure and temperature sensitivities of − 0.96 kPa −1 and − 2.44% ° C −1 , respectively, enabling mutually exclusive sensing performance without signal cross‐interference. The CNF multifunctional sensor is considered the first of its kind to accomplish the stimulus discriminability using only the electrical resistance as the output signal, which is most convenient to monitor and process for device applications. As such, it has distinct advantages over other reported sensors in its simple, cost‐effective fabrication and readout system. It also possesses other invaluable traits, including good bending stability, fast response time, and long‐term durability. Importantly, the ability to simultaneously detect and decouple temperature and pressure stimuli is demonstrated through novel applications as a skin‐mountable device and a flexible game controller.
Publisher: Elsevier BV
Date: 09-2009
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM30590A
Publisher: American Chemical Society (ACS)
Date: 07-12-2022
Publisher: Informa UK Limited
Date: 2005
Publisher: Wiley
Date: 17-09-2022
Abstract: Electronic skins (e‐skins) mimic multimodal sensing capabilities of various tactile receptors in natural skin. Herein, a stretchable chromotropic ionic skin is rationally designed to simultaneously detect and decouple multiple stimuli, including in‐plane strain, temperature, and pressure. The mutually discriminating trimodal ionic skin consists of mechanochromic, thermoresistive and triboelectric layers that in idually function as strain, temperature and pressure sensors, respectively. These three distinct capabilities are integrated into the ionic skin which demonstrates highly sensitive responses to selective external stimuli while upholding high insensitivity to unwanted ones. The structural colors derived from mechanochromic photonic crystals of magnetic ferroferric oxide‐carbon nanoparticles respond to strains by color‐switching in the full visible spectrum, exhibiting appealing potential in interactive stress visualization. The temperature detection with an exceptional sensitivity of 20.44% per °C is enabled by the thermoresistive effect of ionic hydrogel, while oriented polymer chains embedded in the hydrogel decouple temperature from extraneous stimuli. The multilayer structure consisting of an ionic hydrogel film, a wrinkle‐patterned polydimethylsiloxane (PDMS) film with gradient modulus design and a carbon nanotubes/PDMS electrode displays an extraordinary triboelectric effect with a strain‐ and temperature‐insensitive pressure sensing capability. The chromotropic ionic skin facilitates simultaneously accurate measurements, high discriminability and quantitative mapping of complex stimuli, offering new insights into emerging E‐skins.
Publisher: Elsevier BV
Date: 07-2007
Publisher: American Scientific Publishers
Date: 11-2010
Abstract: In this study, the effects of chemical functionalization on the elastic properties of graphene sheets are investigated by using molecular dynamics (MD) and molecular mechanics (MM) simulations. The influences of the degree of functionalization, which is defined as the ratio of the number of the total sp3-hybridized atoms to the number of the total carbon atoms of the graphene sheet, the chirality of graphene sheets, the molecular structure and molecular weight of functional groups on Young's modulus are studied. The dependence of shear modulus and wrinkling properties on the functional groups are also investigated. The simulation results indicate that Young's modulus depends strongly on the degree of functionalization and the molecular structure of the functional groups, while the effects of chirality of the graphene sheets and the molecular weight of the functional groups are negligible. The chemical functionalization also reduces the shear modulus and critical strain, beyond which the wrinkling instability occurs.
Publisher: American Society of Civil Engineers (ASCE)
Date: 07-2008
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1JM00059D
Publisher: American Chemical Society (ACS)
Date: 15-04-2019
Publisher: Springer Science and Business Media LLC
Date: 1994
DOI: 10.1007/BF01162521
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM15048D
Publisher: Elsevier BV
Date: 12-2012
Publisher: Elsevier BV
Date: 2022
Publisher: Springer Science and Business Media LLC
Date: 09-1991
DOI: 10.1007/BF00612409
Publisher: Wiley
Date: 08-11-2018
Publisher: Wiley
Date: 12-12-2016
Publisher: Elsevier BV
Date: 08-2019
Publisher: Elsevier BV
Date: 1991
Publisher: Tsinghua University Press
Date: 09-2023
Publisher: American Chemical Society (ACS)
Date: 15-03-2023
Publisher: Elsevier BV
Date: 2006
Publisher: Wiley
Date: 27-12-2018
Publisher: Elsevier BV
Date: 1992
Publisher: Elsevier BV
Date: 09-2011
Publisher: Elsevier BV
Date: 12-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1DT01351C
Abstract: NiMn 2 O 4 @MXene composites with crumpled surface (C-NMO@MX) were prepared. The C-NMO@MX electrode shows a much higher rate performance and a specific capacitance. The C-NMO@MX delivers a high energy density of 118.9 W h kg −1 at 1.92 kW kg −1 .
Publisher: American Chemical Society (ACS)
Date: 28-12-2017
Publisher: Elsevier BV
Date: 1994
Publisher: Springer Science and Business Media LLC
Date: 1997
Publisher: American Chemical Society (ACS)
Date: 16-05-2019
Publisher: Elsevier BV
Date: 08-2021
Publisher: Springer New York
Date: 2015
Publisher: Elsevier BV
Date: 03-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2003
Publisher: SAGE Publications
Date: 19-06-2009
Abstract: Dry oxidizing methods have been widely used to modify surface properties of polymer and ceramic substrates. Compared to other dry oxidizing methods, ultraviolet light/ozone (UV/O 3 ) treatment has hitherto attracted less attention, mainly due to relatively weak oxidizing power. With optimized processing conditions, however, UV/O 3 treatment can be better capable of offering desired effects associated with appropriate surface modifications. Incorporation of nanoscale reinforcements, e.g., carbon nanotubes (CNTs) and graphite, into a polymer matrix creates a new class of composites that possess unique mechanical and functional capabilities. A proper surface treatment is critical to dispersing the reinforcements in the matrix, hence to provide adequate adhesion between the reinforcements and the matrix. In this article, a review is provided on the underlying mechanisms of and the advantages arising from UV/O 3 treatment of polymer substrates and nanoscale carbon materials. Special focus is placed on the relationship between the changes in chemical composition, morphology, functional groups of the treated surface and the corresponding improvements in adhesion and wettability of the substrate, dispersion of nano-reinforcements, as well as the properties of the nanocomposites made therefrom.
Publisher: Elsevier BV
Date: 06-2020
Publisher: Elsevier BV
Date: 08-2006
Publisher: American Scientific Publishers
Date: 11-2010
Abstract: A new method for preparing black birnessite nanowires is introduced. Layer-structured manganese oxide nanowires were synthesized by a facile hydrothermal method, and using both NaMnO4 and CH3CH2OH as the precursors in a concentrated NaOH solution. The structure, composition, appearance and electrochemical performance of the product were characterized by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), energy diffraction (ED), high-resolution transmission electron microscopy (HRTEM), thermogravimetric analysis (TGA) and constant current charge/discharge. The XRD patterns showed a single phase corresponding to a crystalline birnessite-based manganese oxide. TEM studies suggested their wire-like structures. The TGA measurement demonstrated that they possessed an excellent thermal stability up to 400 degrees C. In the potential window of 2.0-4.3 V, the product exhibited excellent cyclic stability and rapid charge-discharge performance.
Publisher: Springer Science and Business Media LLC
Date: 22-09-2022
DOI: 10.1038/S41467-022-33234-8
Abstract: Cooling in buildings is vital to human well-being but inevitability consumes significant energy, adding pressure on achieving carbon neutrality. Thermally superinsulating aerogels are promising to isolate the heat for more energy-efficient cooling. However, most aerogels tend to absorb the sunlight for unwanted solar heat gain, and it is challenging to scale up the aerogel fabrication while maintaining consistent properties. Herein, we develop a thermally insulating, solar-reflective anisotropic cooling aerogel panel containing in-plane aligned pores with engineered pore walls using boron nitride nanosheets by an additive freeze-casting technique. The additive freeze-casting offers highly controllable and cumulative freezing dynamics for fabricating decimeter-scale aerogel panels with consistent in-plane pore alignments. The unique anisotropic thermo-optical properties of the nanosheets combined with in-plane pore channels enable the anisotropic cooling aerogel to deliver an ultralow out-of-plane thermal conductivity of 16.9 mW m −1 K −1 and a high solar reflectance of 97%. The excellent dual functionalities allow the anisotropic cooling aerogel to minimize both parasitic and solar heat gains when used as cooling panels under direct sunlight, achieving an up to 7 °C lower interior temperature than commercial silica aerogels. This work offers a new paradigm for the bottom-up fabrication of scalable anisotropic aerogels towards practical energy-efficient cooling applications.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8NH00343B
Abstract: 3D pomegranate-like TiN@graphene composites as novel sulfur host materials can effectively improve the electrochemical properties of Li–S systems.
Publisher: Elsevier BV
Date: 06-2008
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8NR10025J
Abstract: Freestanding nitrogen-doped graphene fiber webs prepared by wet-spinning for multi-battery charge storage in both LOBs and LSBs.
Publisher: Elsevier BV
Date: 06-2001
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA03206C
Abstract: This paper reports a facile route to synthesize porous carbon nanofibers containing cobalt and cobalt oxide nanoparticles (CoO x /PCNF) as anodes for Li-ion batteries.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1MH00018G
Abstract: A flexible temperature sensor is developed using electrospun aligned carbon nanofiber films by tuning their atomic structures governed by carbonization temperature. It shows exceptional sensitivity of 1.52% °C −1 and good stimuli discriminability.
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TC31497A
Publisher: Elsevier BV
Date: 10-2017
Publisher: Wiley
Date: 02-09-2020
Publisher: Elsevier BV
Date: 1992
Publisher: American Chemical Society (ACS)
Date: 05-01-2017
DOI: 10.1021/ACS.NANOLETT.6B05126
Abstract: An in-depth understanding of (de)lithiation induced phase transition in electrode materials is crucial to grasp their structure-property relationships and provide guidance to the design of more desirable electrodes. By operando synchrotron XRD (SXRD) measurement and Density Functional Theory (DFT) based calculations, we discover a reversible first-order phase transition for the first time during (de)lithiation of CeO
Publisher: Elsevier BV
Date: 03-2019
Publisher: Springer Science and Business Media LLC
Date: 2000
Publisher: Elsevier BV
Date: 03-2016
Publisher: Wiley
Date: 21-05-2019
Publisher: Springer Science and Business Media LLC
Date: 04-05-2021
DOI: 10.1007/S40820-021-00615-5
Abstract: Flexible multidirectional strain sensors are crucial to accurately determining the complex strain states involved in emerging sensing applications. Although considerable efforts have been made to construct anisotropic structures for improved selective sensing capabilities, existing anisotropic sensors suffer from a trade-off between high sensitivity and high stretchability with acceptable linearity. Here, an ultrasensitive, highly selective multidirectional sensor is developed by rational design of functionally different anisotropic layers. The bilayer sensor consists of an aligned carbon nanotube (CNT) array assembled on top of a periodically wrinkled and cracked CNT–graphene oxide film. The transversely aligned CNT layer bridge the underlying longitudinal microcracks to effectively discourage their propagation even when highly stretched, leading to superior sensitivity with a gauge factor of 287.6 across a broad linear working range of up to 100% strain. The wrinkles generated through a pre-straining/releasing routine in the direction transverse to CNT alignment is responsible for exceptional selectivity of 6.3, to the benefit of accurate detection of loading directions by the multidirectional sensor. This work proposes a unique approach to leveraging the inherent merits of two cross-influential anisotropic structures to resolve the trade-off among sensitivity, selectivity, and stretchability, demonstrating promising applications in full-range, multi-axis human motion detection for wearable electronics and smart robotics.
Publisher: Elsevier BV
Date: 10-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NR06666C
Abstract: Flexible, reduced graphene oxide (rGO)/graphene crumple (GC)/sulfur composite ribbons are prepared by wet spinning as the cathode for LSBs.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA00408J
Abstract: A freestanding mesoporous CuCo 2 O 4 nanograss electrode exhibits a superior pseudocapacitive performance and a high electrocatalytic activity towards methanol oxidation.
Publisher: Elsevier BV
Date: 02-1991
Publisher: Trans Tech Publications, Ltd.
Date: 03-2010
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.97-101.2639
Abstract: The microscopic mechanism of ultrasonic wire bonding is investigated by molecular dynamics simulation on the interfacial contact and adhesion. Considering that the real bonding area is in the state of plane strain, a two-dimensional atomic model is presented. Sutton-Chen potential is adopted for the interaction between gold atoms. Computational results indicate that a strong adhesion generates at the interface after intimate contact between the wire and the bond pad, and the adhesive force should be the mechanism of ultrasonic wire bonding. Combining the real contact area from finite element analysis with the adhesive force from molecular dynamics simulation, the bonding strength of ultrasonic wire bonding is estimated.
Publisher: American Chemical Society (ACS)
Date: 06-10-2017
Abstract: Ideal lithium-ion batteries (LIBs) should possess a high power density, be charged extremely fast (e.g., 100C), and have a long service life. To achieve them all, all battery components, including anodes, cathodes, and electrolytes should have excellent structural and functional characteristics. The present work reports ultrafast-charging and long-life LIB anodes made from TiO
Publisher: Springer Science and Business Media LLC
Date: 15-02-1993
DOI: 10.1007/BF00353200
Publisher: Elsevier BV
Date: 05-2014
Publisher: Elsevier BV
Date: 06-2016
Publisher: Elsevier BV
Date: 2001
Publisher: American Chemical Society (ACS)
Date: 27-05-2014
DOI: 10.1021/NN500590G
Abstract: Cellular-structured graphene foam (GF)/epoxy composites are prepared based on a three-step fabrication process involving infiltration of epoxy into the porous GF. The three-dimensional (3D) GF is grown on a Ni foam template via chemical vapor deposition. The 3D interconnected graphene network serves as fast channels for charge carriers, giving rise to a remarkable electrical conductivity of the composite, 3 S/cm, with only 0.2 wt % GF. The corresponding flexural modulus and strength increase by 53 and 38%, respectively, whereas the glass transition temperature increases by a notable 31 °C, compared to the solid neat epoxy. The GF/epoxy composites with 0.1 wt % GF also deliver an excellent fracture toughness of 1.78 MPa·m(1/2), 34 and 70% enhancements against their "porous" epoxy and solid epoxy counterparts, respectively. These observations signify the unrivalled effectiveness of 3D GF relative to 1D carbon nanotubes or 2D functionalized graphene sheets as reinforcement for polymer composites without issues of nanofiller dispersion and functionalization prior to incorporation into the polymer.
Publisher: Elsevier BV
Date: 12-2014
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 06-2013
Publisher: Springer Science and Business Media LLC
Date: 08-2001
DOI: 10.1007/BF02657725
Publisher: Wiley
Date: 27-01-2005
DOI: 10.1002/APP.21384
Publisher: Elsevier BV
Date: 04-2016
Publisher: Springer Science and Business Media LLC
Date: 06-2003
Publisher: American Chemical Society (ACS)
Date: 03-08-2015
Publisher: Springer Science and Business Media LLC
Date: 2000
Publisher: Informa UK Limited
Date: 2000
Publisher: Informa UK Limited
Date: 2003
Publisher: Elsevier BV
Date: 05-2004
Publisher: American Chemical Society (ACS)
Date: 22-03-2021
Publisher: Elsevier BV
Date: 08-1973
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8TA09062A
Abstract: Onion-like shaped graphene aerogel beads have been prepared via a scalable approach for efficient and easy-to-apply water purification and desalination.
Publisher: Elsevier BV
Date: 05-2001
Publisher: Elsevier BV
Date: 02-2007
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0MH00922A
Abstract: A novel multidimensional strain sensor mimicking human skin is developed. In-plane and pressure subsensors are integrated into a sensor with exceptional sensitivity and selectivity capable of detecting stimuli from 3D directions.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM33615D
Publisher: Elsevier BV
Date: 11-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2TA03195G
Abstract: A cosolvent mitigates the rate-limiting step in the oxidation of iodide and boosts the current of an aqueous Zn–I 2 flow battery.
Publisher: Springer Science and Business Media LLC
Date: 31-05-2008
Publisher: Elsevier BV
Date: 06-2016
Publisher: Elsevier BV
Date: 03-2023
Publisher: Elsevier BV
Date: 05-2013
DOI: 10.1016/J.BIOS.2012.12.056
Abstract: In this work, we report a "turn-on" fluorescent strategy for the direct detection of Cu(2+) in solutions using molecular beacons (MBs) and graphene oxide (GO). MBs are special single-stranded DNA and carry fluorescence sources. GO is a new nanomaterial having remarkable physical properties. In the sensing system, GO was used as an efficient fluorescence quencher upon the adsorption of MBs, which reduced the background signal and made the detection method highly sensitive. In the presence of Cu(2+), the MBs were cut into short pieces and released by the GO, leading to fluorescence restoration. The detection limit of the sensing strategy was ∼50nM, which is sufficiently sensitive for practical applications. The sensing method also exhibited high selectivity in testing s les containing other metal ions. The application of the method for drinking water is demonstrated.
Publisher: Elsevier BV
Date: 12-2011
Publisher: Wiley
Date: 21-12-2013
Publisher: Elsevier BV
Date: 07-2019
Publisher: Elsevier BV
Date: 10-2010
Publisher: Elsevier BV
Date: 10-2014
Publisher: Elsevier BV
Date: 2020
Publisher: Elsevier BV
Date: 09-2008
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2TA00324D
Abstract: The exceptional kinetics of VO 2 + /VO 2+ on a hierarchical nitrogen-doped carbon electrode are quantitatively deciphered by diffusion-less cyclic voltammetry and theoretical calculations.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7MH00104E
Abstract: Integrated GWF/PDMS composite sensors with Bluetooth wireless communication and smartphone function as a wireless wearable musical instrument.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2005
Publisher: Elsevier BV
Date: 2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA11084D
Abstract: With the increasing demand for wearable and implantable electronics, structured sensors with exceptional performance in sensitivity, stretchability, biocompatibility, and adhesion to the biological surfaces have become essential.
Publisher: Elsevier BV
Date: 11-2013
Publisher: Elsevier BV
Date: 05-2003
Publisher: Elsevier BV
Date: 12-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA05298A
Abstract: A scalable scaffold made of carbon nanofibers modified with embedded ZnO nanoparticles as facile nucleation sites for stable plating and stripping of Na is developed, leading to much ameliorated cyclic stability at high current densities.
Publisher: Elsevier BV
Date: 12-2011
Publisher: American Scientific Publishers
Date: 02-2009
Abstract: A simple chemo-mechanical method is proposed for in-situ amino functionalization of carbon nanotubes (CNTs). Ball milling in the presence of ammonium bicarbonate (NH4HCO3) allowed introduction of functional groups like amine, amide on the surface of CNTs. The milled CNTs were characterized extensively using a particle size analyzer, a transmission electronic microscope, Raman spectrometry, X-ray photoelectron spectroscopy, time-of-flight secondary ion mass spectrometry and surface area measurement to evaluate the influences of ball milling conditions. The results show that CNTs milled with NH4HCO3 were more effectively disentangled and shortened than those without the chemical. The amino termination of the functionalized CNTs makes it possible to covalently bond to polymers and biological systems, as well as the potential applications in electronics industry.
Publisher: Elsevier BV
Date: 11-2020
Publisher: Springer Science and Business Media LLC
Date: 05-2001
Publisher: Informa UK Limited
Date: 04-2003
Publisher: Elsevier BV
Date: 1998
Publisher: Elsevier BV
Date: 12-2004
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1MH00907A
Abstract: This review summarizes strategies for achieving high thermal conductivities of polymer composites by tailoring orientation of fillers that is hardly achieved in conventional particulate-filled composites for emerging thermal management applications.
Publisher: Elsevier BV
Date: 04-2010
Publisher: IOP Publishing
Date: 16-06-2020
Publisher: Wiley
Date: 19-12-2016
Publisher: Elsevier BV
Date: 12-2007
Publisher: ASME International
Date: 03-2005
DOI: 10.1115/1.1849232
Abstract: Polymeric encapsulant is widely used to protect the integrated circuit chips and thus to enhance the reliability of electronic packages. Residual stresses are introduced in the plastic package when the polymer is cooled from the curing temperature to ambient, from which many reliability issues arise, including warpage of the package, premature interfacial failure, and degraded interconnections. Bimaterial strip bending experiment has been employed successfully to monitor the evolution of the residual stresses in underfrill resins for flip chip applications. A numerical analysis is developed to predict the residual stresses, which agree well with the experimental measurements. The changes of material properties, such as flexural modulus and coefficient of thermal expansion, of the resins with temperature are taken into account in the finite element analysis.
Publisher: Elsevier BV
Date: 1993
Publisher: Elsevier BV
Date: 07-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NR02449B
Abstract: A self-limiting electrode with double-carbon layers as walls for efficient sodium storage performance.
Publisher: Wiley
Date: 10-07-2008
Publisher: Elsevier BV
Date: 02-2007
Publisher: Elsevier BV
Date: 03-2011
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2TA00426G
Publisher: Elsevier BV
Date: 08-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NR07106C
Abstract: Lithium–oxygen batteries (LOBs) possess the highest theoretical specific density among all types of lithium batteries, making them ideal candidates to replace the current Li ion batteries for next-generation electric vehicle applications.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA03541H
Abstract: A low crystallinity SnO 2 /CNT composite anode delivers a superior electrochemical performance in Na-ion batteries through enhanced kinetics of conversion reactions with a faster ion diffusion rate.
Publisher: American Chemical Society (ACS)
Date: 02-03-2017
Abstract: Ultralight, high-performance electromagnetic interference (EMI) shielding graphene foam (GF) oly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) composites are developed by drop coating of PEDOT:PSS on cellular-structured, freestanding GFs. To enhance the wettability and the interfacial bonds with PEDOT:PSS, GFs are functionalized with 4-dodecylbenzenesulfonic acid. The GF/PEDOT:PSS composites possess an ultralow density of 18.2 × 10
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0TA10580E
Abstract: Perforated carbon platelets are fabricated as a high-performance positive electrode for vanadium redox flow batteries.
Publisher: Springer Science and Business Media LLC
Date: 07-10-2023
Publisher: Elsevier BV
Date: 07-1989
Publisher: Elsevier BV
Date: 02-2021
Publisher: Elsevier BV
Date: 05-2010
Publisher: Wiley
Date: 03-06-2023
Abstract: A Zn anode can offset the low energy density of a flow battery for a balanced approach toward electricity storage. Yet, when targeting inexpensive, long‐duration storage, the battery demands a thick Zn deposit in a porous framework, whose heterogeneity triggers frequent dendrite formation and jeopardizes the stability of the battery. Here, Cu foam is transferred into a hierarchical nanoporous electrode to homogenize the deposition. It begins with alloying the foam with Zn to form Cu 5 Zn 8 , whose depth is controlled to retain the large pores for a hydraulic permeability ≈10 −11 m 2 . Dealloying follows to create nanoscale pores and abundant fine pits below 10 nm, where Zn can nucleate preferentially due to the Gibbs–Thomson effect, as supported by a density functional theory simulation. Morphological evolution monitored by in situ microscopy confirms uniform Zn deposition. The electrode delivers 200 h of stable cycles in a Zn–I 2 flow battery at 60 mAh cm −2 and 60 mA cm −2 , performance that meets practical demands.
Publisher: American Chemical Society (ACS)
Date: 08-05-2009
DOI: 10.1021/AM9000503
Abstract: Nanocomposites reinforced with hybrid fillers of carbon nanotubes (CNTs) and carbon black (CB) are developed, aiming at enhancing the electrical conductivity of composites with balanced mechanical properties while lowering the cost of the final product. Epoxy-based nanocomposites were prepared with varying combinations of CNTs and CB as conducting fillers, and their electrical and mechanical properties were evaluated. It was shown that the addition of CNTs in CB composites enhanced the electrical conductivity of composites: a low percolation threshold was achieved with 0.2 wt % CNTs and 0.2 wt % CB particles. The CB particles also enhanced the ductility and fracture toughness of nanocomposites, confirming the synergistic effect of CB as a multifunctional filler. The novelty of this work lies in the synergy arising from the combination of two conducting fillers with unique geometric shapes and aspect ratios as well as different dispersion characteristics, which have not been specifically considered previously.
Publisher: Elsevier BV
Date: 05-2010
Publisher: Elsevier BV
Date: 07-2017
Publisher: American Chemical Society (ACS)
Date: 04-12-2012
DOI: 10.1021/NN303904Z
Abstract: This study demonstrates that large-size graphene oxide (GO) sheets can impart a tremendous positive impact on self-alignment, electrical conductivity, and mechanical properties of graphene papers. There is a remarkable, more than 3-fold improvement in electrical conductivity of the papers made from ultralarge GO sheets (with an average area of 272.2 μm(2)) compared to that of the small GO counterpart (with an average area of 1.1 μm(2)). The corresponding improvements in Young's modulus and tensile strength are equally notable, namely 320% and 280%, respectively. These improvements of bulk properties due to the large GO sheets are correlated to multiscale elemental and structural characteristics of GO sheets, such as the content of carboxyl groups on the GO edge, C/O ratio and Raman D/G-band intensity ratio of GO on the molecular-scale, and the degree of dispersion and stacking behavior of GO sheets on the microscale. The graphene papers made from larger GO sheets exhibit a closer-stacked structure and better alignment as confirmed by the fast Fourier transform analysis, to the benefits of their electrical conductivity and mechanical properties. The molecular dynamics simulation further elucidates that the enhanced intersheet interactions between large GO sheets play a key role in improving the Young's modulus of GO papers. The implication is that the said properties can be further improved by enhancing the intersheet stress transfer and electrical conduction especially through the thickness direction.
Publisher: Elsevier BV
Date: 06-2013
Publisher: Elsevier BV
Date: 08-1990
Publisher: Elsevier BV
Date: 06-2023
Publisher: Wiley
Date: 12-03-2020
Publisher: Elsevier BV
Date: 07-2010
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM34870E
Publisher: Wiley
Date: 05-02-2022
Abstract: Solar‐powered water evaporation is a straightforward, practical approach to use solar energy for water desalination. Solar absorbers made from photothermal materials capable of effectively confining heat and pumping water to the evaporation surface are essential for a high energy efficiency. However, separate designs of water transport routes and thermal insulating layers are required to simultaneously achieve desired water and thermal managements. This work reports an integrated design for efficient multifunctional capabilities through rational assembly of spectrally modified Ti 3 C 2 T x (SM‐Ti 3 C 2 T x ) nanosheets and polyvinyl alcohol (PVA) into a multiscale 3D aerogel with a feather‐like microstructure. The aerogel contains longitudinal struts with transversely parallel ligaments developed at an angle of ≈ 60 ° from the struts, resembling the microstructure of down feathers in penguins and thus leading to excellent thermal insulation. The hydrophilic porous ligaments serve as upward water transport channels, pumping the water to the evaporation surface while confining it within the ligaments to avoid oversaturation. These functional features endow the composite aerogel with a high energy efficiency of 88.52% and an evaporation rate of 0.92 kg m −2 h −1 at a weak solar irradiance of 0.5‐sun, indicating its great potential for practical solar‐powered water desalination under natural sunlight.
Publisher: Elsevier BV
Date: 08-2012
Publisher: Elsevier BV
Date: 11-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1NR08376G
Abstract: Preparation of porous carbon nanofiber electrodes using electrospinning technology.
Publisher: Springer Science and Business Media LLC
Date: 02-2004
Publisher: Wiley
Date: 03-06-2011
Publisher: Informa UK Limited
Date: 2001
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA00359J
Abstract: Etch-free MOF-induced broad-range mesoporous CNFs are prepared by electrospinning, enabling a highly stable Na metal anode.
Publisher: Springer Science and Business Media LLC
Date: 11-05-2020
Publisher: Elsevier BV
Date: 06-2001
Publisher: Elsevier BV
Date: 1997
Publisher: Elsevier BV
Date: 1998
Publisher: Elsevier BV
Date: 04-2006
Publisher: Springer Science and Business Media LLC
Date: 2001
Publisher: Elsevier BV
Date: 12-2008
Publisher: Springer Science and Business Media LLC
Date: 06-1995
DOI: 10.1007/BF01209212
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9RA07465A
Abstract: 2D Cr 2 O 3 nanosheets are grown on CC with strong interaction and fast charge transfer, and exhibit excellent cyclic performance for LIBs.
Publisher: American Chemical Society (ACS)
Date: 19-11-2021
Abstract: Mechanochromic smart membranes capable of optical modulation have great potential in smart windows, artificial skins, and camouflage. However, the realization of high-contrast optical modulation based on light scattering activated at a low strain remains challenging. Here, we present a strategy for designing mechanochromic scattering membranes by introducing a Young's modulus mismatch between the two interdigitated polydimethylsiloxane phases with weak interfaces in a periodic three-dimensional (3D) structure. The refractive index-matched interfaces of the nanocomposite provide a high optical transparency of 93%. Experimental and computational studies reveal that the 3D heterogeneity facilitates the generation of numerous nanoscale debonds or "nanogaps" at the modulus-mismatching interfaces, enabling incident light scattering under tension. The heterogeneous scatterer delivers both a high transmittance contrast of >50% achieved at 15% strain and a maximum contrast of 82%. When used as a smart window, the membrane demonstrates effective diffusion of transmitting sunlight, leading to moderate indoor illumination by eliminating extremely bright or dark spots. At the other extreme, such a 3D heterogeneous design with strongly bonded interfaces can enhance the coloration sensitivity of mechanophore-dyed nanocomposites. This work presents insights into the design principles of advanced mechanochromic smart membranes.
Publisher: Elsevier BV
Date: 07-2019
Publisher: Elsevier BV
Date: 06-1990
Publisher: Elsevier BV
Date: 07-2000
Publisher: Wiley
Date: 08-04-2014
Abstract: Nanocomposites that contain reinforcements with preferred orientation have attracted significant attention because of their promising applications in a wide range of multifunctional fields. Many efforts have recently been focused on developing facile methods for preparing aligned graphene sheets in solvents and polymers because of their fascinating properties including liquid crystallinity and highly anisotropic characteristics. Self-aligned in situ reduced graphene oxide (rGO) olymer nanocomposites are prepared using an all aqueous casting method. A remarkably low percolation threshold of 0.12 vol% is achieved in the rGO/epoxy system owing to the uniformly dispersed, monolayer graphene sheets with extremely high aspect ratios (>30000). The self-alignment into a layered structure at above a critical filler content induces a unique anisotropy in electrical and mechanical properties due to the preferential formation of conductive and reinforcing networks along the alignment direction. Accompanied by the anisotropic electrical conductivities are exceptionally high dielectric constants of over 14000 with 3 wt% of rGO at 1 kHz due to the charge accumulation at the highly-aligned conductive filler/insulating polymer interface according to the Maxwell-Wagner-Sillars polarization principle. The highly dielectric rGO/epoxy nanocomposites with the engineered structure and properties present high performance electromagnetic interference shielding with a remarkable shilding efficiency of 38 dB.
Publisher: Elsevier BV
Date: 04-2018
Publisher: American Chemical Society (ACS)
Date: 20-07-2021
Publisher: Elsevier BV
Date: 2000
Publisher: Wiley
Date: 10-02-2022
Abstract: Three‐dimensional host structures with superior sodiophilicity and low nucleation barriers can help combat the complex failure modes of Na metal anodes originating from accelerated dendrite formation, anodic corrosion, and electrolyte depletion. This work reports the fabrication of a unique super‐sodiophilic, defect‐rich and hierarchically porous skeletal carbon nanofiber (SCNF) host for SCNF@Na anodes using electrospinning of the low‐cost, renewable lignin biopolymer. The uniform nucleation and plating of Na effectuated by the hierarchically porous structure coupled with the defect‐induced formation of a resilient, F‐rich solid electrolyte interface (SEI) layer offers excellent protection to the metallic anode. The defect‐rich porous structure plays an important role in mediating dense Na nucleation, planar growth, and electrochemical stability according to the depth profiling experiments and density functional theory calculations. The SCNF@Na composite anode maintains high Coulombic efficiencies (CEs) and electrochemical reversibility in asymmetric and symmetric cells. The full cells prepared by interfacing the SCNF@Na anode with a Na 3 V 2 (PO 4 ) 2 F 3 cathode delivers exceptional capacity retention of 106 mAh g –1 for 350 cycles with an average CE of 99.2% at 1C, and 103 mAh g –1 after 200 cycles at 4C. Such rationally designed carbon hosts derived from biopolymers open a new avenue for safe and low‐cost metal batteries.
Publisher: Elsevier BV
Date: 06-2001
Publisher: Informa UK Limited
Date: 2003
Publisher: American Chemical Society (ACS)
Date: 09-06-2015
Abstract: A facile electrospinning method with subsequent heat treatments is employed to prepare carbon nanofibers (CNFs) containing uniformly dispersed Co3O4 nanoparticles as electrodes for supercapacitors. The Co3O4/CNF electrodes with ∼68 wt % active particles deliver a remarkable capacitance of 586 F g(-1) at a current density of 1 A g(-1). When the current density is increased to 50 A g(-1), ∼66% of the original capacitance is retained. The electrodes also present excellent cyclic stability of 74% capacity retention after 2000 cycles at 2 A g(-1). These superior electrochemical properties are attributed to the uniform dispersion of active particles in the CNF matrix, which functions as a conductive support. The onionlike graphitic layers formed around the Co3O4 nanoparticles not only improve the electrical conductivity of the electrode but also prevent the separation of the nanoparticles from the carbon matrix.
Publisher: Springer Science and Business Media LLC
Date: 02-02-2022
DOI: 10.1007/S40820-022-00797-6
Abstract: With the mandate of worldwide carbon neutralization, pursuing comfortable living environment while consuming less energy is an enticing and unavoidable choice. Novel composite aerogels with super thermal insulation and high sunlight reflection are developed for energy-efficient buildings. A solvent-assisted freeze-casting strategy is used to produce boron nitride nanosheet olyvinyl alcohol (BNNS/PVA) composite aerogels with a tailored alignment channel structure. The effects of acetone and BNNS fillers on microstructures and multifunctional properties of aerogels are investigated. The acetone in the PVA suspension enlarges the cell walls to suppress the shrinkage, giving rise to a lower density and a higher porosity, accompanied with much diminished heat conduction throughout the whole product. The addition of BNNS fillers creates whiskers in place of disconnected transverse ligaments between adjacent cell walls, further ameliorating the thermal insulation transverse to the cell wall direction. The resultant BNNS/PVA aerogel delivers an ultralow thermal conductivity of 23.5 mW m −1 K −1 in the transverse direction. The superinsulating aerogel presents both an infrared stealthy capability and a high solar reflectance of 93.8% over the whole sunlight wavelength, far outperforming commercial expanded polystyrene foams with reflective coatings. The anisotropic BNNS/PVA composite aerogel presents great potential for application in energy-saving buildings.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6TA08929A
Abstract: A freestanding electrode consisting of heterogeneous arrays of NiCo 2 O 4 –MnO 2 on a 3D conductive network of graphene foam shows exceptional supercapacitive performance.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0NR00460J
Abstract: 3DHP-VPO 4 @C was synthesized by a novel and facile strategy in which VPO 4 chemically interacted with the carbon framework via a P–C bond.
Publisher: Elsevier BV
Date: 04-2007
Publisher: American Chemical Society (ACS)
Date: 05-2015
Abstract: Novel graphene-like CuO nanofilms are grown on a copper foam substrate by in situ anodization for multifunctional applications as supercapacitor electrodes and photocatalysts for the degradation of dye pollutants. The as-prepared CuO consists of interconnected, highly crystalline, conductive CuO nanosheets with hierarchical open mesopores and a large surface area. The CuO nanofilms supported on a copper foam are employed as freestanding, binder-free electrodes for supercapacitors, which exhibit wonderful electrochemical performance with a large specific capacitance (919 F g(-1) at 1 A g(-1)), an excellent cycling stability (7% capacitance loss after 5000 cycles), and a good rate capability (748 F g(-1) at 30 A g(-1)). The porous CuO nanofilms also demonstrate excellent photocatalytic activities for degradation of methylene blue, with a degradation rate 99% much higher than 54% of the commercial CuO powders after 60 min. This excellent energy storage and photocatalytic performance of the graphene-like CuO nanofilms can open a new avenue for large-scale applications in energy and environmental fields.
Publisher: Elsevier BV
Date: 2008
Publisher: Elsevier BV
Date: 10-2011
Publisher: Wiley
Date: 28-07-2023
Abstract: Hydrogel electrolytes are widely explored in Zn metal batteries for application in wearable electronics. While extensive studies have been conducted on optimizing the chemical structure and boosting the tensile elasticity, the mechanical stability of the hydrogel under repeated deformation is largely overlooked, leading to unsatisfactory performance at large cycling capacity. This work systematically analyzes the compressive fatigue‐resistance properties of the hydrogel electrolyte, revealing the critical roles of the salt and copolymer matrix on crack initiation and propagation. It shows that, on the premise of homogeneous Zn deposition, an improved anti‐fatigue property is essential to achieve high‐capacity Zn metal anodes. The optimal Zn(ClO 4 ) 2 ‐polyacrylamide/chitosan hydrogel electrolyte (C‐PAMCS) exhibits an unprecedented lifespan of 1500 h for Zn//Zn cells at a current density of 10 mA cm −2 and a high areal capacity of 10 mAh cm −2 . The potential application of C‐PAMCS is exemplified in all‐flexible Zn‐ion batteries enabled by a flexible current collector consisting of a Ag nanowires embedded elastomer. This study provides the rationale under hydrogel electrolyte engineering toward advanced Zn‐ion battereis and the application in flexible devices.
Publisher: Elsevier BV
Date: 04-2005
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NR03942A
Abstract: Ternary metal sulfides and ternary metal oxides have received much attention as potential electrodes for high performance rechargeable batteries.
Publisher: Elsevier BV
Date: 10-2019
Publisher: American Chemical Society (ACS)
Date: 29-08-2016
Abstract: Although lithium-sulfur (Li-S) batteries deliver high specific energy densities, lots of intrinsic and fatal obstacles still restrict their practical application. Electrospun carbon nanofibers (CNFs) decorated with ultrafine TiO2 nanoparticles (CNF-T) were prepared and used as a multifunctional interlayer to suppress the volume expansion and shuttle effect of Li-S battery. With this strategy, the CNF network with abundant space and superior conductivity can accommodate and recycle the dissolved polysulfides for the bare sulfur cathode. Meanwhile, the ultrafine TiO2 nanoparticles on CNFs work as anchoring points to capture the polysulfides with the strong interaction, making the battery perform with remarkable and stable electrochemical properties. As a result, the Li-S battery with the CNF-T interlayer delivers an initial reversible capacity of 935 mA h g(-1) at 1 C with a capacity retention of 74.2% after 500 cycles. It is believed that this simple, low-cost and scalable method will definitely bring a novel perspective on the practical utilization of Li-S batteries.
Publisher: Wiley
Date: 06-01-2017
Publisher: Elsevier BV
Date: 09-2017
Publisher: Elsevier BV
Date: 06-2008
Publisher: Elsevier BV
Date: 10-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2TA09983G
Abstract: A highly anisotropic boron nitride composite aerogel is obtained at a low freezing temperature, exhibiting excellent thermal insulation and solar reflectance for energy efficient cooling.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA04257C
Abstract: Multi-functionalized carbon nanofibers containing nanocavity-engineered Si particles as durable high-rate Li-ion anodes were fabricated via a facile electrospinning method.
Publisher: American Chemical Society (ACS)
Date: 14-10-2016
Abstract: Three-dimensional graphene aerogel/TiO
Publisher: Elsevier
Date: 1998
Publisher: Elsevier BV
Date: 1993
Publisher: Springer Science and Business Media LLC
Date: 08-2006
Publisher: Elsevier BV
Date: 08-2019
Publisher: Elsevier BV
Date: 2005
Publisher: American Chemical Society (ACS)
Date: 28-10-2014
DOI: 10.1021/AM504851S
Abstract: Nanocomposites consisting of ultrafine, cobalt carbonate nanoneedles and 3D porous graphene aerogel (CoCO3/GA) are in situ synthesized based on a one-step hydrothermal route followed by freeze-drying. A further heat treatment produces cobalt oxide nanoparticles embedded in the conductive GA matrix (Co(3)O(4)/GA). Both the composite anodes deliver excellent specific capacities depending on current density employed: the CoCO(3)/GA anode outperforms the Co(3)O(4)/GA anode at low current densities, and vice versa at current densities higher than 500 mA g(-1). Their electrochemical performances are considered among the best of similar composite anodes consisting of CoCO(3) or Co(3)O(4) active particles embedded in a graphene substrate. The stable multistep electrochemical reactions of the carbonate compound with a unique nanoneedle structure contribute to the excellent cyclic stability of the CoCO(3)/GA electrode, whereas the highly conductive networks along with low charge transfer resistance are responsible for the high rate performance of the Co(3)O(4)/GA electrode.
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 11-2008
Publisher: Wiley
Date: 20-02-2002
DOI: 10.1002/APP.10406
Publisher: Elsevier BV
Date: 06-2001
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7NH00147A
Abstract: We report dual-functional wearable strain sensors and switches with tunable sensitivities and switching capabilities for wearable wireless health monitoring.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9NH00402E
Abstract: An ‘ion reservoir’, from an internal electric field and lower Li + /Na + adsorption energies at an anatase/TiO 2 (B) interface, ameliorated Li + /Na + storage.
Publisher: Elsevier BV
Date: 10-2014
Publisher: Elsevier BV
Date: 06-2005
Publisher: Elsevier BV
Date: 1993
Publisher: Informa UK Limited
Date: 24-02-2020
Publisher: Elsevier BV
Date: 02-2021
Publisher: Elsevier BV
Date: 2021
Publisher: Elsevier BV
Date: 10-2000
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7TA11119C
Abstract: Hierarchical MoS 2 /C microspheres are synthesized via a facile hydrothermal method, which enable reversible and fast Na storage.
Publisher: Springer Science and Business Media LLC
Date: 1992
DOI: 10.1007/BF01165973
Publisher: Trans Tech Publications Ltd.
Date: 15-06-2006
Publisher: Elsevier BV
Date: 08-2000
Publisher: Elsevier BV
Date: 09-2012
Publisher: Elsevier BV
Date: 07-2006
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA00507D
Publisher: Wiley
Date: 06-08-2018
Publisher: Elsevier BV
Date: 11-2010
Publisher: Elsevier BV
Date: 02-1999
Publisher: American Chemical Society (ACS)
Date: 10-2018
Abstract: Graphene aerogel (GA) has shown great promise as reinforcement of polymeric composites with exceptional electrical and mechanical characteristics. Although there has been significant progress in controlling the structure of GAs, no studies have appeared on the enhanced properties of GAs by employing high-quality precursor graphene flakes (GFs). However, the assembly of high-quality GFs is particularly challenging due to their highly hydrophobic and agglomerative nature in aqueous media, and of the few methods available to synthesize high-quality GFs, most produce flakes with very small lateral sizes. Herein, we report the fabrication of highly crystalline GAs using large nonoxidized graphene flakes (NOGFs) prepared by a novel graphite intercalation compound-based method. Bidirectional freeze casting is utilized for aligning NOGFs in two orthogonal directions, vertically and laterally, where the NOGF walls in idually function as effective conductive pathways. The as-prepared nonoxidized graphene aerogel (NOGA) exhibits a defect concentration as low as 1.4% of impurity oxygen with an excellent electrical conductivity of 202.9 S/m at a low density of 5.7 mg/cm
Publisher: Elsevier BV
Date: 08-2013
Publisher: American Chemical Society (ACS)
Date: 05-2019
Publisher: Informa UK Limited
Date: 2003
Publisher: Wiley
Date: 24-03-2018
Publisher: Elsevier BV
Date: 10-2009
Publisher: Elsevier BV
Date: 1990
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CC03545H
Abstract: A dendrite-free CM@NaK electrode was fabricated via room-temperature adsorption of liquid Na–K onto a super-aligned CNT membrane driven by capillary force.
Publisher: American Chemical Society (ACS)
Date: 15-05-2009
DOI: 10.1021/MA900076Z
Publisher: Elsevier BV
Date: 09-1993
Publisher: Elsevier BV
Date: 2014
Publisher: Elsevier BV
Date: 08-2022
Publisher: American Chemical Society (ACS)
Date: 24-12-2018
Abstract: Advanced wearable strain sensors with high sensitivity and stretchability are an essential component of flexible and soft electronic devices. Conventional metal- and semiconductor-based strain sensors are rigid, fragile, and opaque, restricting their applications in wearable electronics. Graphene-based percolative structures possess high flexibility and transparency but lack high sensitivity and stretchability. Inspired by the highly flexible spider web architecture, we propose semitransparent, ultrasensitive, and wearable strain sensors made from an elastomer-filled graphene woven fabric (E-GWF) for monitoring human physiological signals. The highly flexible elastomer microskeleton and the hierarchical structure of a graphene tube offer the strain sensor with both excellent sensing and switching capabilities. Two different types of E-GWF sensors, including freestanding E-GWF and E-GWF olydimethylsiloxane (PDMS) composites, are developed. When their structure is controlled and optimized, the E-GWF strain sensors simultaneously exhibit extraordinary characteristics, such as a high gauge factor (70 at 10% strain, which ascends to 282 at 20%) in respect to other semitransparent or transparent strain sensors, a broad sensing range up to 30%, and excellent linearity. The E-GWF/PDMS composite sensor shows a unique reversible switching behavior at a high strain level of 30-50%, making it a suitable material for fast and reversible strain switching required in many early warning systems. With a view to real-world applications of these sensors and switches, we demonstrate human motion detection and switch controls of light-emitting-diode l s and liquid-crystal-display circuits. Their unique structure and capabilities can find a wide range of practical applications, such as health monitoring, medical diagnosis, early warning systems for structural failure, and wearable displays.
Publisher: American Scientific Publishers
Date: 03-2008
DOI: 10.1166/JNN.2008.342
Publisher: Wiley
Date: 16-05-2000
DOI: 10.1002/(SICI)1097-4628(20000516)76:7<1000::AID-APP3>3.0.CO;2-X
Publisher: Elsevier BV
Date: 04-2000
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2004
Publisher: Springer Science and Business Media LLC
Date: 1992
DOI: 10.1007/BF01116004
Publisher: IEEE
Date: 2005
Publisher: Informa UK Limited
Date: 2005
Publisher: Springer Science and Business Media LLC
Date: 1992
DOI: 10.1007/BF01116005
Location: No location found
Location: United Arab Emirates
Start Date: 06-2013
End Date: 06-2018
Amount: $460,000.00
Funder: Australian Research Council
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