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Articles 1 - 30 of 197
Full-Text Articles in Physical Sciences and Mathematics
A Comprehensive Review On Controlling Surface Composition Of Pt-Based Bimetallic Electrocatalysts, Binwei Zhang, Huiling Yang, Yunxiao Wang, Shi Xue Dou, Hua-Kun Liu
A Comprehensive Review On Controlling Surface Composition Of Pt-Based Bimetallic Electrocatalysts, Binwei Zhang, Huiling Yang, Yunxiao Wang, Shi Xue Dou, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
With increasing energy demands worldwide, significant efforts have been made to develop superior electrocatalysts for efficient energy conversion systems. Among all the electrocatalysts exploited, Pt-based bimetallic nanomaterials stand out by virtue of their high catalytic activity and relatively low cost due to the introduction of a nonprecious metal component. It should be noted that electrocatalytic reactions only take place on the surface of catalysts, so investigations of the surface composition of Pt-based bimetallic nanomaterials are necessary for practical electrocatalysts. In this review, recent studies on controlling the surface composition of Pt-based bimetallic catalysts for the oxygen reduction reaction, formic acid …
In Operando Mechanism Analysis On Nanocrystalline Silicon Anode Material For Reversible And Ultrafast Sodium Storage, Lei Zhang, Xianluo Hu, Chaoji Chen, Haipeng Guo, Xiaoxiao Liu, Gengzhao Xu, Haijian Zhong, Shuang Cheng, Peng Wu, Jiashen Meng, Yunhui Huang, Shi Xue Dou, Hua-Kun Liu
In Operando Mechanism Analysis On Nanocrystalline Silicon Anode Material For Reversible And Ultrafast Sodium Storage, Lei Zhang, Xianluo Hu, Chaoji Chen, Haipeng Guo, Xiaoxiao Liu, Gengzhao Xu, Haijian Zhong, Shuang Cheng, Peng Wu, Jiashen Meng, Yunhui Huang, Shi Xue Dou, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
Presently, lithium-ion batteries (LIBs) are the most promising commercialized electrochemical energy storage systems. Unfortunately, the limited resource of Li results in increasing cost for its scalable application and a general consciousness of the need to find new type of energy storage technologies. Very recently, substantial effort has been invested to sodium-ion batteries (SIBs) due to their effectively unlimited nature of sodium resources. Furthermore, the potential of Li/Li+ is 0.3 V lower than that of Na/Na+, which makes it more effective to limit the electrolyte degradation on the outer surface of the electrode.[1] Nevertheless, one major obstacle for the commercial application …
Metal-Oxygen Bonds: Stabilizing The Intermediate Species Towards Practical Li-Air Batteries, Yuyang Hou, Yuqing Liu, Zhen Zhou, Lili Liu, Haipeng Guo, Hua-Kun Liu, Jiazhao Wang, Jun Chen
Metal-Oxygen Bonds: Stabilizing The Intermediate Species Towards Practical Li-Air Batteries, Yuyang Hou, Yuqing Liu, Zhen Zhou, Lili Liu, Haipeng Guo, Hua-Kun Liu, Jiazhao Wang, Jun Chen
Australian Institute for Innovative Materials - Papers
Rechargeable nonaqueous Li-air batteries are attracting much attention due to their far higher theoretical energy density than lithium-ion batteries. However, Li-air batteries suffers from poor round-trip efficiency, low rate capability and poor cycle life. To reduce charge overpotentials by understanding reaction mechanism and to operate in ambient air instead of pure oxygen are prerequisites to realization of practical Li-air batteries. Here, we demonstrate a practical Li-air battery using Mo 2 C/CNT as a potential promoter with high round-trip efficiency (∼80%) and improved cycling performance (40 cycles) because Mo 2 C stabilizes the intermediate species from reduction of both O 2 …
The Effect Of Amorphous Tio2 In P25 On Dye-Sensitized Solar Cell Performance, Kadhim Al-Attafi, Andrew Nattestad, Qijie Wu, Yusuke Ide, Yusuke Yamauchi, Shi Xue Dou, Jung Ho Kim
The Effect Of Amorphous Tio2 In P25 On Dye-Sensitized Solar Cell Performance, Kadhim Al-Attafi, Andrew Nattestad, Qijie Wu, Yusuke Ide, Yusuke Yamauchi, Shi Xue Dou, Jung Ho Kim
Australian Institute for Innovative Materials - Papers
P25 is one of the most widely used forms of titanium(IV) oxide (TiO2), routinely utilised in dye-sensitised solar cells (DSCs), where it is often employed as a control, in spite of its poorly defined nature and the typically low device efficiency (or possibly because of this). Work by Park in 2000 and later by Lin et al. suggests that the rutile component might not be to blame for this, as has often been claimed. Recently it has been observed that P25 has quite a sizable amorphous content. A method to selectively remove this non-crystalline material has been developed, allowing for …
Recent Progress In 2d Materials For Flexible Supercapacitors, Yan Han, Yu Ge, Yunfeng Chao, Caiyun Wang, Gordon G. Wallace
Recent Progress In 2d Materials For Flexible Supercapacitors, Yan Han, Yu Ge, Yunfeng Chao, Caiyun Wang, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
High performance supercapacitors coupled with mechanical flexibility are needed to drive flexible and wearable electronics that have anesthetic appeal and multi-functionality. Two dimensional (2D) materials have attracted attention owing to their unique physicochemical and electrochemical properties, in addition to their ability to form hetero-structures with other nanomaterials further improving mechanical and electrochemical properties. After a brief introduction of supercapacitors and 2D materials, recent progress on flexible supercapacitors using 2D materials is reviewed. Here we provide insights into the structure-property relationships of flexible electrodes, in particular free-standing films. We also present our perspectives on the development of flexible supercapacitors.
Raman Studies On Silicene And Germanene, Yani Liu, Jincheng Zhuang, Weichang Hao, Yi Du
Raman Studies On Silicene And Germanene, Yani Liu, Jincheng Zhuang, Weichang Hao, Yi Du
Australian Institute for Innovative Materials - Papers
Two-dimensional (2D) group IV elemental materials are expected to have similar electronic features to their lightest analogue, graphene. The favorable hybridization state of heavier group IV elements is the sp 3 state, leading to buckled structures instead of a planar one. These buckled structures could modulate the vibrational properties of these 2D materials by introducing a strain effect. In this review, the authors focus on the recent research on the Raman spectra of silicene and Germanene from both the theoretical and experimental sides. The abundant superstructures of silicene and Germanene are formed due to the different interaction strengths between silicene/germanene …
Control Of Superconductivity By Means Of Electric-Field-Induced Strain In Superconductor/Piezoelectric Hybrids, D Stamopoulos, M Zeibekis, Shujun Zhang
Control Of Superconductivity By Means Of Electric-Field-Induced Strain In Superconductor/Piezoelectric Hybrids, D Stamopoulos, M Zeibekis, Shujun Zhang
Australian Institute for Innovative Materials - Papers
The controlled modification of superconductivity by any means, specifically in hybrid systems, has attracted much interest in the recent decades. Here, we present experimental data and phenomenological modeling on the control of T C of superconducting (SC) Nb thin films, with thickness 3 nm ≤ dNb≤50 nm, under the application of in-plane strain, S(E ex ) induced by an external out-of-plane electric field, E ex to piezoelectric (PE) single crystals, namely, (1-x)Pb(Mg 1/3 Nb 2/3 )O 3 -xPbTiO 3 (PMN-xPT), with x = 0.27 and 0.31. We report experimental modification of T C of Nb by E ex , accurately …
Electrochemical And Electrostatic Cleavage Of Alkoxyamines, Long Zhang, Eduardo Laborda, Nadim A. Darwish, Benjamin B. Noble, Jason Tyrell, Sandra Pluczyk, Anton P. Le Brun, Gordon G. Wallace, Joaquin Gonzalez, M Coote, Simone Ciampi
Electrochemical And Electrostatic Cleavage Of Alkoxyamines, Long Zhang, Eduardo Laborda, Nadim A. Darwish, Benjamin B. Noble, Jason Tyrell, Sandra Pluczyk, Anton P. Le Brun, Gordon G. Wallace, Joaquin Gonzalez, M Coote, Simone Ciampi
Australian Institute for Innovative Materials - Papers
Alkoxyamines are heat-labile molecules, widely used as an in situ source of nitroxides in polymer and materials sciences. Here we show that the one-electron oxidation of an alkoxyamine leads to a cation radical intermediate that even at room temperature rapidly fragments, releasing a nitroxide and carbocation. Digital simulations of experimental voltammetry and current-time transients suggest that the unimolecular decomposition which yields the "unmasked" nitroxide (TEMPO) is exceedingly rapid and irreversible. High-level quantum computations indicate that the collapse of the alkoxyamine cation radical is likely to yield a neutral nitroxide radical and a secondary phenylethyl cation. However, this fragmentation is predicted …
Superhydrophobic Shape Memory Polymer Arrays With Switchable Isotropic/Anisotropic Wetting, Zhongjun Cheng, Dongjie Zhang, Tong Lv, Hua Lai, Enshuang Zhang, Hongjun Kang, Yongzhen Wang, Pengchang Liu, Yuyan Liu, Yi Du, Shi Xue Dou, Lei Jiang
Superhydrophobic Shape Memory Polymer Arrays With Switchable Isotropic/Anisotropic Wetting, Zhongjun Cheng, Dongjie Zhang, Tong Lv, Hua Lai, Enshuang Zhang, Hongjun Kang, Yongzhen Wang, Pengchang Liu, Yuyan Liu, Yi Du, Shi Xue Dou, Lei Jiang
Australian Institute for Innovative Materials - Papers
Smart surfaces with tunable wettability have aroused much attention in the past few years. However, to obtain a surface that can reversibly transit between the lotus-leaf-like superhydrophobic isotropic and rice-leaf-like superhydrophobic anisotropic wettings is still a challenge. This paper, by mimicking microstructures on both lotus and rice leaves, reports such a surface that is prepared by creating micro/nanostructured arrays on the shape memory polymer. On the surface, the microstructure shapes can be reversibly changed between the lotus-leaf-like random state and the rice-leaf-like 1D ordered state. Accordingly, repeated switch between the superhydrophobic isotropic and anisotropic wettings can be displayed. Research results …
Super-Compatible Functional Boron Nitride Nanosheets/Polymer Films With Excellent Mechanical Properties And Ultra-High Thermal Conductivity For Thermal Management, Jiemin Wang, Yuanpeng Wu, Ye Xue, Dan Liu, Xuebin Wang, Xiao Hu, Yoshio Bando, Weiwei Lei
Super-Compatible Functional Boron Nitride Nanosheets/Polymer Films With Excellent Mechanical Properties And Ultra-High Thermal Conductivity For Thermal Management, Jiemin Wang, Yuanpeng Wu, Ye Xue, Dan Liu, Xuebin Wang, Xiao Hu, Yoshio Bando, Weiwei Lei
Australian Institute for Innovative Materials - Papers
High heat-dissipation polymers are currently in great demand especially with the rapid development of electronic devices. However, traditional polymer composites usually suffer from both low thermal conductivity due to poor dispersibility and low concentration of fillers in the polymer matrix. To address this issue, it is necessary to improve the compatibility between the thermal conductive fillers and polymer matrix. Here, we designed a highly water-soluble functionalized boron nitride (FBN) nanosheet. Unlike most functional BN nanosheets that are only dispersible in water with polymer matrix at low concentrations, our FBN nanosheets can be mutually dispersed with aqueous polymers such as polyvinyl …
Enhanced Thermoelectric Performance Through Synergy Of Resonance Levels And Valence Band Convergence Via Q/In (Q = Mg, Ag, Bi) Co-Doping, Lijuan Zhang, Peng Qin, Chao Han, Jian Li Wang, Zhenhua Ge, Qiao Sun, Zhenxiang Cheng, Zhen Li, Shi Xue Dou
Enhanced Thermoelectric Performance Through Synergy Of Resonance Levels And Valence Band Convergence Via Q/In (Q = Mg, Ag, Bi) Co-Doping, Lijuan Zhang, Peng Qin, Chao Han, Jian Li Wang, Zhenhua Ge, Qiao Sun, Zhenxiang Cheng, Zhen Li, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
The temperature-dependent evolution of heavy-hole valence band contribution to the Seebeck coefficients of SnTe-based thermoelectric materials is revealed in situ by neutron and synchrotron powder diffraction. The additional carriers with high effective mass are created in a heavy-hole valence band above 493 K, which contribute to the electrical transport, and lead to a significant enhancement of the Seebeck coefficient at high temperature. In addition, remarkably improved electrical transport properties are achieved through the synergetic effects of the resonance levels, the valence band convergence, and the carrier concentration optimization by co-doping with Mg & In, Ag & In and Bi & …
Charging Ahead: How Australia Is Innovating In Battery Technology, Jonathan Knott
Charging Ahead: How Australia Is Innovating In Battery Technology, Jonathan Knott
Australian Institute for Innovative Materials - Papers
Lithium-ion remains the most widespread battery technology in use today, thanks to the fact that products that use it are both portable and rechargeable. It powers everything from your smartphone to the "world's biggest battery" in South Australia. Demand for batteries is expected to accelerate in coming decades with the increase in deployment of electric vehicles and the need to store energy generated from renewable sources, such as solar photovoltaic panels. But rising concerns about mining practices and shortages in raw materials for lithium-ion batteries - as well as safety issues - have led to a search for alternative technologies.
Porous Zr2sc-Carbon Composite Microspheres: Possible Radiation Tolerant Sorbents And Transmutation Hosts For Technetium-99, Nicholas Scales, Jun Chen, Robert Aughterson, Inna Karatchevtseva, Attila Stopic, Gregory R. Lumpkin, Vittorio Luca
Porous Zr2sc-Carbon Composite Microspheres: Possible Radiation Tolerant Sorbents And Transmutation Hosts For Technetium-99, Nicholas Scales, Jun Chen, Robert Aughterson, Inna Karatchevtseva, Attila Stopic, Gregory R. Lumpkin, Vittorio Luca
Australian Institute for Innovative Materials - Papers
The preparation, characteristics and adsorption properties of novel porous carbon-ceramic composite microspheres are presented. The composites were synthesised by a simple ion exchange process involving the cationic Zr tetramer and commonly-available macroporous sulphonated polystyrene-divinylbenzene cation exchange resins, with subsequent carbothermal reduction at 1350 °C. The materials were extensively characterised with respect to composition, chemical structure and porosity. Carbothermal reduction of the Zr-loaded templates resulted in formation of crystallites of the MAX phase zirconium sulphide carbide (Zr 2 SC) embedded within a highly microporous carbon framework with a macroporous secondary structure inherited from the resin template. Despite the high BET surface …
Alkaline Fuel Cells With Novel Gortex-Based Electrodes Are Powered Remarkably Efficiently By Methane Containing 5% Hydrogen, Klaudia K. Wagner, Prerna Tiwari, Gerhard F. Swiegers, Gordon G. Wallace
Alkaline Fuel Cells With Novel Gortex-Based Electrodes Are Powered Remarkably Efficiently By Methane Containing 5% Hydrogen, Klaudia K. Wagner, Prerna Tiwari, Gerhard F. Swiegers, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Numerous electric and gas utilities are actively pursuing "power-to-gas" technology, which involves using unwanted, excess renewable energy to manufacture hydrogen gas (H 2 ) that is then injected into the existing natural gas pipeline network in 5-10% by volume. This work reports an alkaline fuel cell that has the potential to harness such gas mixtures for downstream generation of electric power. The fuel cell, which employs novel Gortex-based electrodes layered with Pd/Pt catalysts, generates electricity remarkably efficiently when fuelled with methane (CH 4 ) containing 5% hydrogen. Methane constitutes the major component of natural gas. The fuel cell has been …
Readily Exfoliated Tise2 Nanosheets For High-Performance Sodium Storage, Dan Zhang, Guoqiang Zhao, Peng Li, Yu Zhang, Wenbin Qiu, Jie Shu, Yinzhu Jiang, Shi Xue Dou, Wenping Sun
Readily Exfoliated Tise2 Nanosheets For High-Performance Sodium Storage, Dan Zhang, Guoqiang Zhao, Peng Li, Yu Zhang, Wenbin Qiu, Jie Shu, Yinzhu Jiang, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
Materials with sheet-like morphologies are highly desirable candidates for energy storage and conversion applications, due to the confined atomic thickness and high surface area, which would largely improve the electrochemical reaction kinetics. In this work, the sodium storage performance of TiSe 2 nanosheets and corresponding sodiation/desodiation reaction mechanism are studied for the first time. TiSe 2 nanosheets are readily exfoliated from bulk TiSe 2 after quick ultrasonication or grinding. The TiSe 2 nanosheets exhibit a reversible capacity of 147mAhg -1 at 0.1Ag -1 , and show excellent rate capability with a capacity of 103mAhg -1 at an ultra-high current density …
Origin Of Magnetic Flux-Jumps In Nb Films Subject To Mechanical Vibrations And Corresponding Magnetic Perturbations, Igor A. Golovchanskiy, Alexey V. Pan, Tom H. Johansen, Jonathan George, Igor Rudnev, Anatoly B. Rosenfeld, Sergey Fedoseev
Origin Of Magnetic Flux-Jumps In Nb Films Subject To Mechanical Vibrations And Corresponding Magnetic Perturbations, Igor A. Golovchanskiy, Alexey V. Pan, Tom H. Johansen, Jonathan George, Igor Rudnev, Anatoly B. Rosenfeld, Sergey Fedoseev
Australian Institute for Innovative Materials - Papers
In this paper the origin of flux-jumps in Nb thin films is established during magnetization measurements using a vibrating sample magnetometer (VSM). Magnetization measurements of the flux avalanche activity show its strong dependence on frequency and amplitude of VSM vibration. In particular, under certain conditions the vibrations induce a transition from a stable superconducting critical state to an undercritical state, accompanied by the 20-fold drop in the magnetic moment. These features allow the elucidation of the origin of the flux-jumps. In contrast to the commonly assumed thermomagnetic instabilities to be responsible for the flux-jumps in Nb films, our results provide …
Suppression Of The Photocatalytic Activity Of Tio2 Nanoparticles Encapsulated By Chitosan Through A Spray-Drying Method With Potential For Use In Sunblocking Applications, Alexander Morlando, Vitor Sencadas, Dean Cardillo, Konstantin K. Konstantinov
Suppression Of The Photocatalytic Activity Of Tio2 Nanoparticles Encapsulated By Chitosan Through A Spray-Drying Method With Potential For Use In Sunblocking Applications, Alexander Morlando, Vitor Sencadas, Dean Cardillo, Konstantin K. Konstantinov
Australian Institute for Innovative Materials - Papers
Solar exposure, in particular to UVA and UVB radiation, is a major carcinogen through direct DNA damage and the production of reactive oxygen species (ROS). Inorganic UV filters present in sunscreening agents, such as titanium dioxide (TiO 2 ), are commonly employed for protection however, due to their photocatalytic nature, they have been shown to instigate the production of ROS when irradiated with UV radiation, which in turn can lead to the degradation of the sunscreening formulation and subsequent damage to the skin. In this work, chitosan/TiO 2 nanocomposite particles were produced via a spray-drying method, in a single step, …
Enhanced Uv-Light Detection Based On Zno Nanowires/Graphene Oxide Hybrid Using Cost-Effective Low Temperature Hydrothermal Process, Tariq Alzoubi, Hamzeh Qutaish, Esraa Al-Shawwa, Sameh Hamzawy
Enhanced Uv-Light Detection Based On Zno Nanowires/Graphene Oxide Hybrid Using Cost-Effective Low Temperature Hydrothermal Process, Tariq Alzoubi, Hamzeh Qutaish, Esraa Al-Shawwa, Sameh Hamzawy
Australian Institute for Innovative Materials - Papers
A new low-cost optimized hydrothermal process of direct synthesis of ZnO nanowires (NWs)/graphene oxide (GO) hybrid on silicon substrates at a low growth temperature (∼60°C) is reported. The careful optimization of the growth conditions and ZnO/GO relative ratios have resulted in high-density ZnO NWs formation with homogenous density and size distributions directly on GO sheets. The fabricated nanocomposites were intensively investigated by employing different structural, optical and electrical characterization techniques such as SEM, EDX, XRD, FTIR, UV-VIS and I-V. SEM analysis showed a formation of highly dense ZnO NWs on GO sheets with homogenous size di stributions with average approximate …
Nature Of Magnetism In Thiol-Capped Gold Nanoparticles Investigated With Muon Spin Rotation, M H. Dehn, D J. Arseneau, T Buck, David L. Cortie, D G. Fleming, Shirin King, W A. Macfarlane, Andrew M. Mcdonagh, R M. L Mcfadden, David R. G Mitchell, R F. Kiefl
Nature Of Magnetism In Thiol-Capped Gold Nanoparticles Investigated With Muon Spin Rotation, M H. Dehn, D J. Arseneau, T Buck, David L. Cortie, D G. Fleming, Shirin King, W A. Macfarlane, Andrew M. Mcdonagh, R M. L Mcfadden, David R. G Mitchell, R F. Kiefl
Australian Institute for Innovative Materials - Papers
Muon spin rotation/relaxation measurements show clear evidence for magnetism in 2.2 nm gold nanoparticles capped with butanethiol. At low temperatures (1.8 K), there is significant spin relaxation which decreases as a function of both the applied longitudinal magnetic field and increasing temperature. The results indicate that there are spatially inhomogeneous electronic moments that fluctuate with a wide distribution of correlation times. Possible explanations are discussed.
Hybrid Nanoarchitecturing Of Hierarchical Zinc Oxide Wool-Ball-Like Nanostructures With Multi-Walled Carbon Nanotubes For Achieving Sensitive And Selective Detection Of Sulfur Dioxide, Ni Luh Wulan Septiani, Yusuf Valentino Kaneti, Brian Yuliarto, Nugraha Nugraha, Hermawan Dipojono, Toshiaki Takei, Jungmok You, Yusuke Yamauchi
Hybrid Nanoarchitecturing Of Hierarchical Zinc Oxide Wool-Ball-Like Nanostructures With Multi-Walled Carbon Nanotubes For Achieving Sensitive And Selective Detection Of Sulfur Dioxide, Ni Luh Wulan Septiani, Yusuf Valentino Kaneti, Brian Yuliarto, Nugraha Nugraha, Hermawan Dipojono, Toshiaki Takei, Jungmok You, Yusuke Yamauchi
Australian Institute for Innovative Materials - Papers
This work reports a facile glycerol-assisted solvothermal method for synthesizing hierarchical three-dimensional (3D) wool-ball-like zinc oxide (ZnO) nanostructures and their subsequent modifications with multi-walled carbon nanotubes (MWCNTs) as modifiers for achieving sensitive and selective detection of toxic sulfur dioxide (SO2) gas. Structurally, the as-synthesized 3D wool-ball-like ZnO is assembled of two-dimensional (2D) plate-like structures, which themselves are arranged by numerous small nanoparticles. Furthermore, in this work we observed an interesting new phenomenon in which when a high concentration of MWCNTs is introduced, many small nanorods grew on the surface of the plate-like structures which assemble the 3D wool-ball-like ZnO nanostructures. …
An Electrosynthesized 3d Porous Molybdenum Sulfide/Graphene Film With Enhanced Electrochemical Performance For Lithium Storage, Yu Ge, Caiyun Wang, Yong Zhao, Yong Liu, Yunfeng Chao, Tian Zheng, Gordon G. Wallace
An Electrosynthesized 3d Porous Molybdenum Sulfide/Graphene Film With Enhanced Electrochemical Performance For Lithium Storage, Yu Ge, Caiyun Wang, Yong Zhao, Yong Liu, Yunfeng Chao, Tian Zheng, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Molybdenum sulfide/graphene composites are promising anode materials for lithium-ion batteries (LIBs). In this work, MoS x /graphene composite film with an ideal 3D porous structure is developed via a facile and straightforward electrochemical route. The MoS x nanoparticles are uniformly anchored on the graphene nanosheets that are randomly arranged, resulting in MoS x /graphene composites with well-developed porous structure. Benefiting from such structure and the synergistic effect from two components, this material shows a high specific capacity over 1200 mA h g −1 , an excellent rate performance, and superior cycling stability. The dominating pseudocapacitive behavior in Li storage contributes …
Two-Dimensional Nanostructures For Sodium-Ion Battery Anodes, Jianfeng Mao, Tengfei Zhou, Yang Zheng, Hong Gao, Hua-Kun Liu, Zaiping Guo
Two-Dimensional Nanostructures For Sodium-Ion Battery Anodes, Jianfeng Mao, Tengfei Zhou, Yang Zheng, Hong Gao, Hua-Kun Liu, Zaiping Guo
Australian Institute for Innovative Materials - Papers
Sodium-ion batteries (SIBs) have attracted great attention recently due to the abundance of sodium resources, particularly for large-scale electric energy storage applications for renewable energy and smart grids. More and more nanostructured anode materials have been developed with the aims of high energy density, high cycling stability, and excellent rate capability, in which two-dimensional (2D) nanostructures are showing promise due to their shortened paths for sodium ion transportation and larger surface areas for sodium ion absorption. Moreover, 2D materials (e.g. graphene) have been proved to be excellent supporting and conducting agents in SIB anodes due to their high electrical conductivity …
Engineering Of Lithium-Metal Anodes Towards A Safe And Stable Battery, Lei Wang, Ziyue Zhou, Xiao Yan, Feng Hou, Lei Wen, Wenbin Luo, Ji Liang, Shi Xue Dou
Engineering Of Lithium-Metal Anodes Towards A Safe And Stable Battery, Lei Wang, Ziyue Zhou, Xiao Yan, Feng Hou, Lei Wen, Wenbin Luo, Ji Liang, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Currently, the state-of-the-art lithium-ion batteries (LIBs) are the most widely used energy storage devices and have brought a great impact on our daily life. However, even many strategies have been reported to improve the energy density, these LIBs still can not meet the rapidly growing demand from the many lately emerged devices. During the pursue of higher energy densities, lithium-metal batteries (LMBs) have been the most promising candidates of the next-generation energy storage devices. Unfortunately, the Li-metal anode usually induces severe safety concerns and inferior cycle performance, because of the dendrite growth, high reactivity, and infinite volume changes of Li …
Magnetic And Structural Transitions Tuned Through Valence Electron Concentration In Magnetocaloric Mn(Co1-Xnix)Ge, Qing Yon Ren, Wayne D. Hutchison, Jian Li Wang, Andrew J. Studer, Stewart J. Campbell
Magnetic And Structural Transitions Tuned Through Valence Electron Concentration In Magnetocaloric Mn(Co1-Xnix)Ge, Qing Yon Ren, Wayne D. Hutchison, Jian Li Wang, Andrew J. Studer, Stewart J. Campbell
Australian Institute for Innovative Materials - Papers
The structural and magnetic properties of magnetocaloric Mn(Co 1-x Ni x )Ge compounds have been studied. Two responses to the increase of valence electron concentration on substitution of Ni (3d 8 4s 2 ) for Co (3d 7 4s 2 ) in the orthorhombic phase (Pnma) are proposed: expansion of unit-cell volume and redistribution of valence electrons. We present experimental evidence for electronic redistribution associated with the competition between magnetism and bonding. This competition in turn leads to complex dependences of the reverse martensitic transformation temperature T M (orthorhombic to hexagonal (P6 3 /mmc)) and the magnetic structures on the …
Modulation Of Donor-Acceptor Distance In A Series Of Carbazole Push-Pull Dyes; A Spectroscopic And Computational Study, Joshua Sutton, Jonathan E. Barnsley, Joseph Mapley, Pawel W. Wagner, David L. Officer, Keith C. Gordon
Modulation Of Donor-Acceptor Distance In A Series Of Carbazole Push-Pull Dyes; A Spectroscopic And Computational Study, Joshua Sutton, Jonathan E. Barnsley, Joseph Mapley, Pawel W. Wagner, David L. Officer, Keith C. Gordon
Australian Institute for Innovative Materials - Papers
A series of eight carbazole-cyanoacrylate based donor-acceptor dyes were studied. Within the series the influence of modifying the thiophene bridge, linking donor and acceptor and a change in the nature of the acceptor, from acid to ester, was explored. In this joint experimental and computational study we have used electronic absorbance and emission spectroscopies, Raman spectroscopy and computational modeling (density functional theory). From these studies it was found that extending the bridge length allowed the lowest energy transition to be systematically red shifted by 0.12 eV, allowing for limited tuning of the absorption of dyes using this structural motif. Using …
Gradient Chemical Order In The Relaxor Pb(Mg1/3nb2/3)O3, Matthew Cabral, Shujun Zhang, Elizabeth Dickey, James Lebeau
Gradient Chemical Order In The Relaxor Pb(Mg1/3nb2/3)O3, Matthew Cabral, Shujun Zhang, Elizabeth Dickey, James Lebeau
Australian Institute for Innovative Materials - Papers
Here, we apply aberration-corrected scanning transmission electron microscopy to quantify chemical ordering in the relaxor Pb(Mg 1/3 Nb 2/3 )O 3 (PMN). We find that contrary to the prevailing model of a binary distribution of chemically ordered regions within a disordered matrix, the degree of ordering smoothly varies within an ordered domain and approaches a minimum at anti-phase boundaries. These results provide direct insight into the nature of cation ordering in this important prototypical relaxor material.
Decomposition Mechanism Of Zinc Ammine Borohydride: A First-Principles Calculation, Xiaowei Chen, Weidong Zou, Renquan Li, Guanglin Xia, Xuebin Yu
Decomposition Mechanism Of Zinc Ammine Borohydride: A First-Principles Calculation, Xiaowei Chen, Weidong Zou, Renquan Li, Guanglin Xia, Xuebin Yu
Australian Institute for Innovative Materials - Papers
The decomposition mechanism of zinc ammine borohydride ([Zn(NH 3 ) 2 ][BH 4 ] 2 ) has been studied by density functional theory calculation. The release of B 2 H 6 and BH 3 is predicted to be kinetically and/or thermodynamically unfavorable for [Zn(NH 3 ) 2 ][BH 4 ] 2 , in agreement with experimental results that no boranes were detected during decomposition. The climbing image nudged elastic band calculation and ab initio molecular dynamics simulations indicate the formation of NH 3 BH 3 and B 2 H 7 - intermediates during decomposition of [Zn(NH 3 ) 2 ][BH …
Fluorinated Phosphazene Derivative - A Promising Electrolyte Additive For High Voltage Lithium Ion Batteries: From Electrochemical Performance To Corrosion Mechanism, Jianwen Liu, X Song, Lai Zhou, Shiquan Wang, Wei Song, Wei Liu, H L. Long, Lixin Zhou, Huimin Wu, Chuanqi Feng, Zaiping Guo
Fluorinated Phosphazene Derivative - A Promising Electrolyte Additive For High Voltage Lithium Ion Batteries: From Electrochemical Performance To Corrosion Mechanism, Jianwen Liu, X Song, Lai Zhou, Shiquan Wang, Wei Song, Wei Liu, H L. Long, Lixin Zhou, Huimin Wu, Chuanqi Feng, Zaiping Guo
Australian Institute for Innovative Materials - Papers
The development of novel electrolytes for next-generation high voltage lithium ion battery is of primary importance. In this work, a fluorinated phosphazene derivative, ethoxy-(pentafluoro)-cyclotriphosphazene (PFN), is proposed as a novel electrolyte additive for improving the electrochemical performance and safety of lithium nickel manganese oxide (LiNi 0.5 Mn 1.5 O 4 ) cathode. With the addition of PFN, the electrolyte can be preferentially oxidized and decomposed, thus producing some linear polymers, multi-ring polymers, LiNO 3 , RONO 2 Li (RONO 2 : nitrate ester functional group, with R standing for any organic residue), Li 3 PO 4 , and ROPO 3 …
The Serine Protease Htra1 Contributes To The Formation Of An Extracellular 25-Kda Apolipoprotein E Fragment That Stimulates Neuritogenesis, Sonia Sanz Munoz, Hongyun Li, Kalani R. Ruberu, Qian Chu, Alan Saghatelian, Lezanne Ooi, Brett Garner
The Serine Protease Htra1 Contributes To The Formation Of An Extracellular 25-Kda Apolipoprotein E Fragment That Stimulates Neuritogenesis, Sonia Sanz Munoz, Hongyun Li, Kalani R. Ruberu, Qian Chu, Alan Saghatelian, Lezanne Ooi, Brett Garner
Australian Institute for Innovative Materials - Papers
Apolipoprotein-E (apoE) is a glycoprotein highly expressed in the brain, where it appears to play a role in lipid transport, β-amyloid clearance, and neuronal signaling. ApoE proteolytic fragments are also present in the brain, but the enzymes responsible for apoE fragmentation are unknown, and the biological activity of specific apoE fragments remains to be determined. Here we utilized SK-N-SH neuroblastoma cells differentiated into neurons with all-trans-retinoic acid (ATRA) to study extracellular apoE proteolysis. ApoE fragments were detectable in culture supernatants after 3 days, and their levels were increased for up to 9 days in the presence of ATRA. The concentration …
A New Approach To The Inverse Problem For Current Mapping In Thin-Film Superconductors, Jack Zuber, Frederick Wells, Sergey Fedoseev, Tom H. Johansen, Anatoly B. Rosenfeld, Alexey V. Pan
A New Approach To The Inverse Problem For Current Mapping In Thin-Film Superconductors, Jack Zuber, Frederick Wells, Sergey Fedoseev, Tom H. Johansen, Anatoly B. Rosenfeld, Alexey V. Pan
Australian Institute for Innovative Materials - Papers
A novel mathematical approach has been developed to complete the inversion of the Biot-Savart law in one- and two-dimensional cases from measurements of the perpendicular component of the magnetic field using the well-developed Magneto-Optical Imaging technique. Our approach, especially in the 2D case, is provided in great detail to allow a straightforward implementation as opposed to those found in the literature. Our new approach also refines our previous results for the 1D case [Johansen et al., Phys. Rev. B 54, 16264 (1996)], and streamlines the method developed by Jooss et al. [Physica C 299, 215 (1998)] deemed as the most …