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Articles 121 - 150 of 1524
Full-Text Articles in Physical Sciences and Mathematics
High Pressure Synchrotron X-Ray Diffraction Study Of The Mn0.94ti0.06coge Alloy, Precious Shamba, J C. Debnath, Jian Li Wang, Qinfen Gu
High Pressure Synchrotron X-Ray Diffraction Study Of The Mn0.94ti0.06coge Alloy, Precious Shamba, J C. Debnath, Jian Li Wang, Qinfen Gu
Australian Institute for Innovative Materials - Papers
High pressure x-ray diffraction studies up to 10.4 GPa were performed on the Mn0.94Ti0.06CoGe alloy using synchrotron radiation with a diamond anvil cell. No structural phase transitions occurred in the entire range of our measurements. Unit cell parameters were determined up to 10.4 GPa and the calculated unit cell volumes were found to be well represented by a third order Birch-Murnaghan equation of state. The bulk modulus determined from the pressure - volume data was found to be, B0 = 231.72 ± 7.79 GPa. This study, employing high resolution synchrotron x-rays has helped clarify the behaviour of the Mn0.94Ti0.06CoGe alloy …
Engineering Additional Edge Sites On Molybdenum Dichalcogenides Toward Accelerated Alkaline Hydrogen Evolution Kinetics, Qian Zhou, Guoqiang Zhao, Kun Rui, Yaping Chen, Xun Xu, Shi Xue Dou, Wenping Sun
Engineering Additional Edge Sites On Molybdenum Dichalcogenides Toward Accelerated Alkaline Hydrogen Evolution Kinetics, Qian Zhou, Guoqiang Zhao, Kun Rui, Yaping Chen, Xun Xu, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
The sluggish reaction kinetics of the hydrogen evolution reaction (HER) in alkaline media is a great obstacle to alkaline water electrolysis, and it remains a great challenge to develop precious metal-free efficient catalysts for the alkaline HER. Transition metal dichalcogenides (TMDs), in particular MoS2 and MoSe2, are promising catalysts for the HER in acidic media, but they exhibit much inferior catalytic activity for the alkaline HER owing to the slow water dissociation process. In this work, we, for the first time, demonstrate that TMD heterostructures with abundant edge sites deliver substantially accelerated alkaline HER kinetics, which is in great part …
Chemical Design Of Palladium-Based Nanoarchitectures For Catalytic Applications, Muhammad Iqbal, Yusuf Valentino Kaneti, Jeonghun Kim, Brian Yuliarto, Yong-Mook Kang, Yoshio Bando, Yoshiyuki Sugahara, Yusuke Yamauchi
Chemical Design Of Palladium-Based Nanoarchitectures For Catalytic Applications, Muhammad Iqbal, Yusuf Valentino Kaneti, Jeonghun Kim, Brian Yuliarto, Yong-Mook Kang, Yoshio Bando, Yoshiyuki Sugahara, Yusuke Yamauchi
Australian Institute for Innovative Materials - Papers
Palladium (Pd) plays an important role in numerous catalytic reactions, such as methanol and ethanol oxidation, oxygen reduction, hydrogenation, coupling reactions, and carbon monoxide oxidation. Creating Pd-based nanoarchitectures with increased active surface sites, higher density of low-coordinated atoms, and maximized surface coverage for the reactants is important. To address the limitations of pure Pd, various Pd-based nanoarchitectures, including alloys, intermetallics, and supported Pd nanomaterials, have been fabricated by combining Pd with other elements with similar or higher catalytic activity for many catalytic reactions. Herein, recent advances in the preparation of Pd-based nanoarchitectures through solution-phase chemical reduction and electrochemical deposition methods …
Long-Life Room-Temperature Sodium-Sulfur Batteries By Virtue Of Transition-Metal-Nanocluster-Sulfur Interactions, Binwei Zhang, Tian Sheng, Yunxiao Wang, Shulei Chou, Kenneth Davey, Shi Xue Dou, Shizhang Qiao
Long-Life Room-Temperature Sodium-Sulfur Batteries By Virtue Of Transition-Metal-Nanocluster-Sulfur Interactions, Binwei Zhang, Tian Sheng, Yunxiao Wang, Shulei Chou, Kenneth Davey, Shi Xue Dou, Shizhang Qiao
Australian Institute for Innovative Materials - Papers
Room‐temperature sodium–sulfur (RT‐Na/S) batteries hold significant promise for large‐scale application because of low cost of both sodium and sulfur. However, the dissolution of polysulfides into the electrolyte limits practical application. Now, the design and testing of a new class of sulfur hosts as transition‐metal (Fe, Cu, and Ni) nanoclusters (ca. 1.2 nm) wreathed on hollow carbon nanospheres (S@M‐HC) for RT‐Na/S batteries is reported. A chemical couple between the metal nanoclusters and sulfur is hypothesized to assist in immobilization of sulfur and to enhance conductivity and activity. S@Fe‐HC exhibited an unprecedented reversible capacity of 394 mAh g−1 despite 1000 cycles …
A Freestanding Cnts Film Fabricated By Pyrrole-Modified Cvd For Capacitive Deionization, Dan Song, Wenlei Guo, Tao Zhang, Pengyi Lu, Anran Guo, Feng Hou, Xiao Yan, Ji Liang
A Freestanding Cnts Film Fabricated By Pyrrole-Modified Cvd For Capacitive Deionization, Dan Song, Wenlei Guo, Tao Zhang, Pengyi Lu, Anran Guo, Feng Hou, Xiao Yan, Ji Liang
Australian Institute for Innovative Materials - Papers
Carbon nanotubes (CNTs) are an excellent electrode material for capacitive deionization (CDI), due to their excellent electronic conductivity and outstanding chemical/physical stability. Their powder form and easy aggregation, however, have greatly limited their practical CDI performance. Aiming to address this issue, the authors report a freestanding CNT film which was fabricated by floating-catalyst chemical vapor deposition, as a binder-free electrode for CDI. By simply adjusting the pyrrole content in the precursor, the morphology of the resulting CNT film can be tuned to meet the requirements of CDI. In the presence of 2 wt.% pyrrole, the CNT film with a mesoporous …
Electrochemical Impacts Of Sheet-Like Hafnium Phosphide And Hafnium Disulfide Catalysts Bonded With Reduced Graphene Oxide Sheets For Bifunctional Oxygen Reactions In Alkaline Electrolytes, Mayilvel Meganathan, Taizhong Huang, Hengyi Fang, Jianfeng Mao, Guoxin Sun
Electrochemical Impacts Of Sheet-Like Hafnium Phosphide And Hafnium Disulfide Catalysts Bonded With Reduced Graphene Oxide Sheets For Bifunctional Oxygen Reactions In Alkaline Electrolytes, Mayilvel Meganathan, Taizhong Huang, Hengyi Fang, Jianfeng Mao, Guoxin Sun
Australian Institute for Innovative Materials - Papers
Non-noble metal-based catalysts with efficient catalytic activities for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are critical for energy conversion devices, including fuel cells and metal–air batteries. In this work, novel hafnium phosphide-reduced graphene oxide nanosheets (HfP-rGO NS) and hafnium disulfide-reduced graphene oxide nanosheets (HfS2-rGO NS) were synthesized and investigated as bifunctional electrocatalysts for OER and ORR. The prepared HfP-rGO NS and HfS2-rGO NS catalysts showed nanosheet structures, where the HfP or HfS2 nanosheet was closely packed with rGO. A unique methodology was adopted to lodge the non-metal oxide catalytic sheets (i.e., HfP and HfS2) over the …
Effects Of Ipa Treatment On The Photovoltaic Performance Of Bulk Heterojunction Organic Solar Cells, Ali Aghassi, Cormac Fay
Effects Of Ipa Treatment On The Photovoltaic Performance Of Bulk Heterojunction Organic Solar Cells, Ali Aghassi, Cormac Fay
Australian Institute for Innovative Materials - Papers
The treatment of the bulk heterojunction (BHJ) active layer by polar solvents such as alcohols is regarded as a simple, yet effective technique to enhance the power conversion efficiency (PCE) of organic solar cells (OSCs). This study investigated the impact of isopropyl alcohol (IPA) on the photovoltaic performance of two BHJ solar cell devices composed of (a) Poly[N-9′-heptadecanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) and (b) 7,7′-[4,4-Bis(2-ethylhexyl)-4H-silolo[3,2-b:4,5-b′] dithiophene-2,6-diyl]bis [6-fluoro-4-(5′-hexyl-[2,2′-bithiophen]-5-yl)benzo[c][1,2,5]thiadiazole (p-DTS(FBTTh 2 ) 2 as donors and [6,6]-phenyl-C61-butyric acid methyl ester (PC 60 BM) as the acceptor in both instances. The physical characteristics of the active layers before and after the treatment were established by UV-Vis …
Ordered Platinum-Bismuth Intermetallic Clusters With Pt-Skin For A Highly Efficient Electrochemical Ethanol Oxidation Reaction, Binwei Zhang, Weihong Lai, Tian Sheng, Xi-Ming Qu, Yunxiao Wang, Long Ren, Lei Zhang, Yi Du, Yan-Xia Jiang, Shi-Gang Sun, Shi Xue Dou
Ordered Platinum-Bismuth Intermetallic Clusters With Pt-Skin For A Highly Efficient Electrochemical Ethanol Oxidation Reaction, Binwei Zhang, Weihong Lai, Tian Sheng, Xi-Ming Qu, Yunxiao Wang, Long Ren, Lei Zhang, Yi Du, Yan-Xia Jiang, Shi-Gang Sun, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
The ethanol oxidation reaction is extensively explored, but electrocatalysts that could achieve a complete oxidation pathway to CO 2 /CO 32- are much less reported. Here, we synthesize a monatomic Pt layer (Pt-skin) on ordered intermetallic PtBi clusters (PtBi@Pt) supported on graphene via a single atom self-assembling (SAS) method to form a superior catalyst. The PtBi@Pt with an ultrafine size (∼2 nm) delivers an extremely high mass activity of 9.01 mA μg Pt-1 , which is 8-fold more active than the commercial Pt/C; significantly, in situ Fourier transform infrared spectroscopy indicates that ethanol is completely oxidized to CO 32- on …
Sb2te3 Topological Insulator: Surface Plasmon Resonance And Application In Refractive Index Monitoring, Hua Lu, Siqing Dai, Zengji Yue, Yicun Fan, Huachao Cheng, Jianglei Di, Dong Mao, Enpu Li, Ting Mei, Jianlin Zhao
Sb2te3 Topological Insulator: Surface Plasmon Resonance And Application In Refractive Index Monitoring, Hua Lu, Siqing Dai, Zengji Yue, Yicun Fan, Huachao Cheng, Jianglei Di, Dong Mao, Enpu Li, Ting Mei, Jianlin Zhao
Australian Institute for Innovative Materials - Papers
Topological insulators as new emerging building blocks in electronics and photonics present promising prospects for exciting surface plasmons and enhancing light-matter interaction. Thus, exploring the visible-range plasmonic response of topological insulators is significant to reveal their optical characteristics and broaden their applications at high frequencies. Herein, we report the experimental demonstration of a visible-range surface plasmon resonance (SPR) effect on an antimony telluride (Sb 2 Te 3 ) topological insulator film. The results show that the SPR can be excited with a relatively small incident angle in the Kretschmann configuration based on the Sb 2 Te 3 film. Especially, we …
Platinum/Nickel Bicarbonate Heterostructures Towards Accelerated Hydrogen Evolution Under Alkaline Conditions, Mengmeng Lao, Kun Rui, Guoqiang Zhao, Peixin Cui, Xusheng Zheng, Shi Xue Dou, Wenping Sun
Platinum/Nickel Bicarbonate Heterostructures Towards Accelerated Hydrogen Evolution Under Alkaline Conditions, Mengmeng Lao, Kun Rui, Guoqiang Zhao, Peixin Cui, Xusheng Zheng, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
Heterostructured nanomaterials, generally have physicochemical properties that differ from those of the individual components, and thus have potential in a wide range of applications. New platinum (Pt)/nickel bicarbonate (Ni(HCO 3 ) 2 ) heterostructures are designed for an efficient alkaline hydrogen evolution reaction (HER). Notably, the specific and mass activity of Pt in Pt/Ni(HCO 3 ) 2 are substantially improved compared to the bare Pt nanoparticles (NPs). The Ni(HCO 3 ) 2 provides abundant water adsorption/dissociation sites and modulate the electronic structure of Pt, which determine the elementary reaction kinetics of alkaline HER. The Ni(HCO 3 ) 2 nanoplates offer …
Using Force-Displacement Relations To Obtain Actuation Parameters From Artificial Muscles, Geoffrey M. Spinks, Shannon Bakarich, Shazed Md Aziz, Bidita Binte Salahuddin, Hai Xin
Using Force-Displacement Relations To Obtain Actuation Parameters From Artificial Muscles, Geoffrey M. Spinks, Shannon Bakarich, Shazed Md Aziz, Bidita Binte Salahuddin, Hai Xin
Australian Institute for Innovative Materials - Papers
Many different test methods are currently used to characterise the output of artificial muscle materials but few studies report the full range of possible force and displacements that can be generated by a given material when activated with a given input stimulus but when operated against different external loads. The measurement of the loading and unloading force extension curves in tension in both the un-activated and activated states is investigated as a means for efficiently characterising the full range of outputs for three different types of artificial muscles: pneumatically operated braided muscle and thermally operated shape memory alloy spring and …
Nio-Nanofillers Embedded In Graphite/Pva-Polymer Matrix For Efficient Electromagnetic Radiation Shielding, Tariq Alzoubi, Borhan Albiss, M-Ali Al-Akhras, Hamzeh Qutaish, Enad Abed Mahmood Alabed, Sheik Md. Kazi Nazrul Islam
Nio-Nanofillers Embedded In Graphite/Pva-Polymer Matrix For Efficient Electromagnetic Radiation Shielding, Tariq Alzoubi, Borhan Albiss, M-Ali Al-Akhras, Hamzeh Qutaish, Enad Abed Mahmood Alabed, Sheik Md. Kazi Nazrul Islam
Australian Institute for Innovative Materials - Papers
In this study, we report on the preparation of NiO/graphite sheets nanofillers in PVA-polymer matrix using a simple cost-effective hydrothermal process for EM shielding effectiveness applications. The careful optimization of the growth conditions and NiO/G/PVA relative ratios have resulted in NiO nanoparticles formation with homogeneous density. In this nanocomposite, the NiO nanoparticles and graphite sheets were incorporated into a polymer to enhance the electromagnetic shielding effectiveness. The morphological, structural, and chemical analysis have been conducted by SEM, EDX and XRD techniques. EDX and XRD analysis confirmed the exact chemical composition with high purity. SEM images showed the best morphology with …
Rapid Fabrication Of Diffusion Barrier Between Metal Electrode And Thermoelectric Materials Using Current-Controlled Spark Plasma Sintering Technique, Xavier Reales Ferreres, Sima Aminorroaya-Yamini
Rapid Fabrication Of Diffusion Barrier Between Metal Electrode And Thermoelectric Materials Using Current-Controlled Spark Plasma Sintering Technique, Xavier Reales Ferreres, Sima Aminorroaya-Yamini
Australian Institute for Innovative Materials - Papers
A continuous, stable diffusion barrier between PbTe thermoelectric material and Ni conducting electrode was generated using the current-controlled spark plasma sintering technique. This new method creates a diffusion barrier layer by utilising the melt generated in the area of contact between components, also called the weld nugget in a resistance spot welding process. The current-controlled spark plasma sintering process bonds the solid workpieces in a fraction of the time required to fabricate interphase layers using powder components with the common temperature-controlled spark plasma sintering. The substantially reduced time of bonding compared to previous methods is beneficial to the thermoelectric properties …
Enhancing Oxygen Evolution Efficiency Of Multiferroic Oxides By Spintronic And Ferroelectric Polarization Regulation, Xiaoning Li, Huan Liu, Zezhi Chen, Qingmei Wu, Zheyin Yu, Mengmeng Yang, Xiaolin Wang, Zhenxiang Cheng, Zhengping Fu, Yalin Lu
Enhancing Oxygen Evolution Efficiency Of Multiferroic Oxides By Spintronic And Ferroelectric Polarization Regulation, Xiaoning Li, Huan Liu, Zezhi Chen, Qingmei Wu, Zheyin Yu, Mengmeng Yang, Xiaolin Wang, Zhenxiang Cheng, Zhengping Fu, Yalin Lu
Australian Institute for Innovative Materials - Papers
Regulating the electronic structure of catalysts is the most efficient strategy yet, despite its limitations, to improve their oxygen evolution efficiency. Instead of only adjusting the electronic structure, here we utilize ferroelectric polarization to accelerate the oxygen evolution reaction as well. This is demonstrated on a multiferroic layered perovskite Bi 5 CoTi 3 O 15 with in-situ grown BiCoO 3 . Thanks to the superimposed effects of electronic regulation and ferroelectric polarization, the as-prepared multiferroic electrocatalysts are more efficient than the benchmark IrO 2 (with a final 320 mV overpotential at the current density of 10 mA cm −2 and …
Electronic Structure Engineering Of Licoo2 Toward Enhanced Oxygen Electrocatalysis, Xiaobo Zheng, Yaping Chen, Xusheng Zheng, Guoqiang Zhao, Kun Rui, Peng Li, Xun Xu, Zhenxiang Cheng, Shi Xue Dou, Wenping Sun
Electronic Structure Engineering Of Licoo2 Toward Enhanced Oxygen Electrocatalysis, Xiaobo Zheng, Yaping Chen, Xusheng Zheng, Guoqiang Zhao, Kun Rui, Peng Li, Xun Xu, Zhenxiang Cheng, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
Developing low-cost and efficient electrocatalysts for the oxygen evolution reaction and oxygen reduction reaction is of critical significance to the practical application of some emerging energy storage and conversion devices (e.g., metal-air batteries, water electrolyzers, and fuel cells). Lithium cobalt oxide is a promising nonprecious metal-based electrocatalyst for oxygen electrocatalysis; its activity, however, is still far from the requirements of practical applications. Here, a new LiCoO 2 -based electrocatalyst with nanosheet morphology is developed by a combination of Mg doping and shear force-assisted exfoliation strategies toward enhanced oxygen reduction and evolution reaction kinetics. It is demonstrated that the coupling effect …
Magnetism-Mediated Thermoelectric Performance Of The Cr-Doped Bismuth Telluride Tetradymite, J Vaney, Sima Aminorroaya-Yamini, H Takaki, Kazuaki Kobayashi, N Kobayashi, Taizo Mori
Magnetism-Mediated Thermoelectric Performance Of The Cr-Doped Bismuth Telluride Tetradymite, J Vaney, Sima Aminorroaya-Yamini, H Takaki, Kazuaki Kobayashi, N Kobayashi, Taizo Mori
Australian Institute for Innovative Materials - Papers
Enhancing the efficiency of thermoelectric materials has been practiced extensively by either improving the power factor or reducing the lattice thermal conductivity. Magnetism, and the magnetic moment-charged carrier interactions, has been suggested to enhance the efficiency of some compounds. Nevertheless, decoupling of the magnetic and the carrier concentration-related effects has never been achieved to prove once and for all, the importance of magnetism in thermoelectricity. Herein, we report improved quality criterion of bismuth telluride upon chromium substitution. The magnetic interactions with the magnetic moment carried by Cr atoms have increased the electrons' effective mass, enhancing the thermopower. Combined with the …
Flexible Piezoelectric Energy Harvester/Sensor With High Voltage Output Over Wide Temperature Range, Yanhua Sun, Jianguo Chen, Xiaoning Li, Yun Lu, Shujun Zhang, Zhenxiang Cheng
Flexible Piezoelectric Energy Harvester/Sensor With High Voltage Output Over Wide Temperature Range, Yanhua Sun, Jianguo Chen, Xiaoning Li, Yun Lu, Shujun Zhang, Zhenxiang Cheng
Australian Institute for Innovative Materials - Papers
A flexible piezoelectric energy harvester based on polyimide (PI)/(Bi,La)FeO 3 -PbTiO 3 (BLF-PT) 0-3 composite was fabricated by a cost-effective two-step process. The energy harvesting outputs are sensitive to the BLF-PT weight fraction and testing frequency. The flexible BLF-PT/PI composite with 30 wt% BLF-PT exhibits an open circuit voltage of 110 V and a short circuit current of 310 nA under pressure of 0.18 MPa at frequency of 1 Hz. Of particular significance is that the flexible energy harvester exhibits high temperature stability up to 150 °C and a voltage output of 30 V at temperatures as high as 300 …
Plasma Functionalisation Of Few-Layer Graphenes And Carbon Nanotubes For Graphene Microsupercapacitors, Emily Smith, Yuqing Liu, Chris Stirling, David J. Watson, Robert C.T. Slade, Jun Chen, Carol Crean
Plasma Functionalisation Of Few-Layer Graphenes And Carbon Nanotubes For Graphene Microsupercapacitors, Emily Smith, Yuqing Liu, Chris Stirling, David J. Watson, Robert C.T. Slade, Jun Chen, Carol Crean
Australian Institute for Innovative Materials - Papers
Plasma processing, as a commercial and large-scale technology, was used to functionalize few-layer graphene (FLG) and multi-walled carbon nanotubes (MWCNT). The successful functionalities of FLG and MWCNT have been confirmed by elemental microanalysis, X-ray photoelectron spectroscopy, acid-base titration and zeta potential measurements. With the assistance of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT/PSS), a water-dispersible and conductive polymer, a composite of functionalized FLG and MWCNT was fabricated into large-size flexible films and also interdigitated microelectrodes for microsupercapacitor application via simple and scalable techniques (i.e. doctor blading and laser-etching). When normalised by volume and area, the devices made from FLG(NH3)-MWCNT(Acid) (19.9 F cm−3 at 5 mV …
New Insights Into The Relationship Between Draw Solution Chemistry And Trace Organic Rejection By Forward Osmosis, Lei Zheng, William E. Price, James A. Mcdonald, Stuart J. Khan, Takahiro Fujioka, Long D. Nghiem
New Insights Into The Relationship Between Draw Solution Chemistry And Trace Organic Rejection By Forward Osmosis, Lei Zheng, William E. Price, James A. Mcdonald, Stuart J. Khan, Takahiro Fujioka, Long D. Nghiem
Australian Institute for Innovative Materials - Papers
This study elucidates the impact of draw solution chemistry (in terms of pH and draw solute species) and membrane fouling on water flux and the rejection of trace organic contaminants by forward osmosis. The results show that draw solution chemistry could induce a notable impact on both water flux and TrOCs rejection. In addition, the impact was further influenced by membrane fouling. The reverse flux of proton (or hydroxyl) could alter the feed solution pH, which governed the separation of ionisable TrOCs. In addition, charged compounds generally exhibited higher rejections than neutral ones by the clean membrane. Electrostatic interaction, rather …
Flexible And Free-Standing Siox/Cnt Compositefilms For High Capacityand Durable Lithium Ion Batteries, Wenlei Guo, Xiao Yan, Feng Hou, Lei Wen, Yejing Dai, Deming Yang, Xiaotong Jiang, Jian Liu, Ji Liang, Shi Xue Dou
Flexible And Free-Standing Siox/Cnt Compositefilms For High Capacityand Durable Lithium Ion Batteries, Wenlei Guo, Xiao Yan, Feng Hou, Lei Wen, Yejing Dai, Deming Yang, Xiaotong Jiang, Jian Liu, Ji Liang, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Flexible and free-standing electrode materials are prerequisite and key components for next-generation flexible energy storage and conversion devices. However, it is still a chanllenge to fabricate these materials from a continuous, straightforward, and facile method. Herein, we report a flexible composite film with silicon oxides decorated on few-walled carbon nanotubes, which can be continuously fabricated and directly drawn from the hot zone of the reactor. The composite film can be readily used for electrochemical lithium ion storage with high and reversible specific capacity, good rate capability, and excellent cycling performance. These exceptional characteristics make it very promising for flexible energy …
Insights Into The Electron Transfer Kinetics, Capacitance And Resistance Effects Of Implantable Electrodes Using Fourier Transform Ac Voltammetry On Platinum, Alexander R. Harris, Carrie Newbold, Robert Cowan, Gordon G. Wallace
Insights Into The Electron Transfer Kinetics, Capacitance And Resistance Effects Of Implantable Electrodes Using Fourier Transform Ac Voltammetry On Platinum, Alexander R. Harris, Carrie Newbold, Robert Cowan, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
The charge transfer mechanism at the electrode-solution interface was assessed by Fourier transform AC voltammetry (FTACV). The faradaic reactions that occur within the safe potential window on platinum had slow electron transfer kinetics. The charge transfer mechanisms during short chronopotentiometric stimulation of cells, is most likely dominated by capacitance. Impedance was modelled with a single time constant. FTACV was fit with a 2-component equivalent circuit comprising a series capacitor and resistor. Capacitance and resistance varied with electrode potential, area, topography, surface functionality and solution composition. Capacitance correlated with charge storage capacity measured by voltammetry. Increased capacitance reduced the change in …
Chemical Properties, Structural Properties, And Energy Storage Applications Of Prussian Blue Analogues, Weijie Li, Chao Han, Gang Cheng, Shulei Chou, Hua-Kun Liu, Shi Xue Dou
Chemical Properties, Structural Properties, And Energy Storage Applications Of Prussian Blue Analogues, Weijie Li, Chao Han, Gang Cheng, Shulei Chou, Hua-Kun Liu, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Prussian blue analogues (PBAs, A 2 T[M(CN) 6 ], A = Li, K, Na; T = Fe, Co, Ni, Mn, Cu, etc.; M = Fe, Mn, Co, etc.) are a large family of materials with an open framework structure. In recent years, they have been intensively investigated as active materials in the field of energy conversion and storage, such as for alkaline-ion batteries (lithium-ion, LIBs; sodium-ion, NIB; and potassium-ion, KIBs), and as electrochemical catalysts. Nevertheless, few review papers have focused on the intrinsic chemical and structural properties of Prussian blue (PB) and its analogues. In this Review, a comprehensive insight …
Low-Coordinate Iridium Oxide Confined On Graphitic Carbon Nitride For Highly Efficient Oxygen Evolution, Jiayi Chen, Peixin Cui, Guoqiang Zhao, Kun Rui, Mengmeng Lao, Yaping Chen, Xusheng Zheng, Yinzhu Jiang, Hongge Pan, Shi Xue Dou, Wenping Sun
Low-Coordinate Iridium Oxide Confined On Graphitic Carbon Nitride For Highly Efficient Oxygen Evolution, Jiayi Chen, Peixin Cui, Guoqiang Zhao, Kun Rui, Mengmeng Lao, Yaping Chen, Xusheng Zheng, Yinzhu Jiang, Hongge Pan, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
Highly active and durable electrocatalysts for the oxygen evolution reaction (OER) is greatly desired. Iridium oxide/graphitic carbon nitride (IrO2/GCN) heterostructures are designed with low-coordinate IrO2 nanoparticles (NPs) confined on superhydrophilic highly stable GCN nanosheets for efficient acidic OER. The GCN nanosheets not only ensure the homogeneous distribution and confinement of IrO2 NPs but also endows the heterostructured catalyst system with a superhydrophilic surface, which can maximize the exposure of active sites and promotes mass diffusion. The coordination number of Ir atoms is decreased owing to the strong interaction between IrO2 and GCN, leading to lattice strain and increment of electron …
In Situ Fabrication Of Branched Tio2/C Nanofibers As Binder‐Free And Free‐Standing Anodes For High‐Performance Sodium‐Ion Batteries, Ling Wang, Guorui Yang, Jianan Wang, Silan Wang, Caiyun Wang, Shengjie Peng, Wei Yan, Seeram Ramakrishna
In Situ Fabrication Of Branched Tio2/C Nanofibers As Binder‐Free And Free‐Standing Anodes For High‐Performance Sodium‐Ion Batteries, Ling Wang, Guorui Yang, Jianan Wang, Silan Wang, Caiyun Wang, Shengjie Peng, Wei Yan, Seeram Ramakrishna
Australian Institute for Innovative Materials - Papers
Herein, 1D free-standing and binder-free hierarchically branched TiO2/C nanofibers (denoted as BT/C NFs) based on an in situ fabrication method as an anode for sodium-ion batteries are reported. The in situ fabrication endows this material with large surface area and strong structural stability, providing this material with abundant active sites and smooth channels for fast ion transportation. As a result, BT/C NFs with the character of free-standing membranes are directly used as binder-free anode for sodium-ion batteries, delivering a capacity of 284 mA h g−1 at a current density of 200 mA g−1 after 1000 cycles. Even at a high …
A 3d-Printed Electrochemical Water Splitting Cell, Chong Yong Lee, Adam Taylor, Stephen T. Beirne, Gordon G. Wallace
A 3d-Printed Electrochemical Water Splitting Cell, Chong Yong Lee, Adam Taylor, Stephen T. Beirne, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
3D printing offers an attractive approach in fabricating complex designs across a wide range of materials to meet the functional requirements of targeted applications. In this study, the surface-patterned metallic electrodes are printed and integrated with custom built reaction vessels produced via a polymer-based 3D printing approach to create a complete electrochemical cell. It is shown that metallic electrodes with conical surface structures can be printed from Ti and Ni. In addition to conventional flat electrodes, the design can be tailor-made to any desirable geometry such as a curved structure. The transformation of inactive Ti electrodes with the deposition of …
Oxygen Vacancies Promoting The Electrocatalytic Performance Of Ceo 2 Nanorods As Cathode Materials For Li-O 2 Batteries, Yue Hou, Jun Wang, Chuanxin Hou, Yuqi Fan, Yanjie Zhai, Hongyu Li, Feng Dang, Shulei Chou
Oxygen Vacancies Promoting The Electrocatalytic Performance Of Ceo 2 Nanorods As Cathode Materials For Li-O 2 Batteries, Yue Hou, Jun Wang, Chuanxin Hou, Yuqi Fan, Yanjie Zhai, Hongyu Li, Feng Dang, Shulei Chou
Australian Institute for Innovative Materials - Papers
Li-O 2 batteries have become very promising power sources for electronic vehicles as a result of their extraordinary energy density. Nevertheless, the unfavourable electrocatalytic activity of cathode materials in Li-O 2 batteries is still a limiting factor for the practical application of Li-O 2 batteries. This study proposes a surface engineering strategy which can enhance the electrocatalytic activity of CeO 2 nanorods by tuning the oxygen vacancies on their surface, and found that the highest concentration of oxygen vacancies induces the best electrochemical performance, including an extended electrochemical stability of 200 cycles, and reduces the overpotential of the ORR from …
Nanosheets-In-Nanotube Co3o4-Carbon Array Design Enables Stable Li-Ion Storage, Dayi Guo, Lu Pan, Jianmin Hao, Limin Han, Ding Yi, Yajing Wang, Yijun Yang, Yoshio Bando, Xi Wang
Nanosheets-In-Nanotube Co3o4-Carbon Array Design Enables Stable Li-Ion Storage, Dayi Guo, Lu Pan, Jianmin Hao, Limin Han, Ding Yi, Yajing Wang, Yijun Yang, Yoshio Bando, Xi Wang
Australian Institute for Innovative Materials - Papers
Carbon composite products with different structures have been developed and used as anode for lithium-ion batteries due to the superior elasticity of carbon, which can keep the morphology integrity of the electrode materials in the process of the multiple cycles. Herein, a novel structure of nanosheets-in-nanotube Co 3 O 4 /carbon arrays is fabricated by the method of modified chemical vapor deposition (CVD). The carbon nanotube (CNT) layer acting as an outside coater can efficiently prevent the electrode from fragmentation and consequently ensure its shape integrity. The specific structure shows the ultra-stable cycle life (850 mAh g −1 after 200 …
Structural Engineering Of Hierarchical Micro‐Nanostructured Ge-C Framework By Controlling The Nucleation For Ultralong Life Li Storage, Shilin Zhang, Yang Zheng, Xuejuan Huang, Jian Hong, Bin Cao, Junnan Hao, Qining Fan, Tengfei Zhou, Zaiping Guo
Structural Engineering Of Hierarchical Micro‐Nanostructured Ge-C Framework By Controlling The Nucleation For Ultralong Life Li Storage, Shilin Zhang, Yang Zheng, Xuejuan Huang, Jian Hong, Bin Cao, Junnan Hao, Qining Fan, Tengfei Zhou, Zaiping Guo
Australian Institute for Innovative Materials - Papers
The rational design of a proper electrode structure with high energy and power densities, long cycling lifespan, and low cost still remains a significant challenge for developing advanced energy storage systems. Germanium is a highly promising anode material for high-performance lithium ion batteries due to its large specific capacity and remarkable rate capability. Nevertheless, poor cycling stability and high price significantly limit its practical application. Herein, a facile and scalable structural engineering strategy is proposed by controlling the nucleation to fabricate a unique hierarchical micro-nanostructured Ge-C framework, featuring high tap density, reduced Ge content, superb structural stability, and a 3D …
Quantum Oscillations Of Robust Topological Surface States Up To 50 K In Thick Bulk-Insulating Topological Insulator, Weiyao Zhao, Lei Chen, Zengji Yue, Zhi Li, David L. Cortie, Michael S. Fuhrer, Xiaolin Wang
Quantum Oscillations Of Robust Topological Surface States Up To 50 K In Thick Bulk-Insulating Topological Insulator, Weiyao Zhao, Lei Chen, Zengji Yue, Zhi Li, David L. Cortie, Michael S. Fuhrer, Xiaolin Wang
Australian Institute for Innovative Materials - Papers
As personal electronic devices increasingly rely on cloud computing for energy-intensive calculations, the power consumption associated with the information revolution is rapidly becoming an important environmental issue. Several approaches have been proposed to construct electronic devices with low-energy consumption. Among these, the low-dissipation surface states of topological insulators (TIs) are widely employed. To develop TI-based devices, a key factor is the maximum temperature at which the Dirac surface states dominate the transport behavior. Here, we employ Shubnikov-de Haas oscillations (SdH) as a means to study the surface state survival temperature in a high-quality vanadium doped Bi1.08Sn0.02Sb0.9Te2S single crystal system. The …
Li2s-Based Li-Ion Sulfur Batteries: Progress And Prospects, Jicheng Jiang, Qining Fan, Shulei Chou, Zaiping Guo, Konstantin K. Konstantinov, Hua-Kun Liu, Jiazhao Wang
Li2s-Based Li-Ion Sulfur Batteries: Progress And Prospects, Jicheng Jiang, Qining Fan, Shulei Chou, Zaiping Guo, Konstantin K. Konstantinov, Hua-Kun Liu, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
The great demand for high-energy-density batteries has driven intensive research on the Li–S battery due to its high theoretical energy density. Consequently, considerable progress in Li–S batteries is achieved, although the lithium anode material is still challenging in terms of lithium dendrites and its unstable interface with electrolyte, impeding the practical application of the Li–S battery. Li2S-based Li-ion sulfur batteries (LISBs), which employ lithium-metal-free anodes, are a convenient and effective way to avoid the use of lithium metal for the realization of practical Li–S batteries. Over the past decade, studies on LISBs are carried out to optimize their performance. Herein, …