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Articles 31 - 60 of 644
Full-Text Articles in Engineering
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 …
Effect Of Monophasic Pulsed Stimulation On Live Single Cell De-Adhesion On Conducting Polymers With Adsorbed Fibronectin As Revealed By Single Cell Force Spectroscopy, Hongrui Zhang, Gordon G. Wallace, Michael J. Higgins
Effect Of Monophasic Pulsed Stimulation On Live Single Cell De-Adhesion On Conducting Polymers With Adsorbed Fibronectin As Revealed By Single Cell Force Spectroscopy, Hongrui Zhang, Gordon G. Wallace, Michael J. Higgins
Australian Institute for Innovative Materials - Papers
The force required to detach a single fibroblast cell in contact with the conducting polymer, polypyrrole doped with dodecylbenzene, was quantified using the Atomic Force Microscope-based technique, Single Cell Force Spectroscopy. The de-adhesion force for a single cell was 0.64 ± 0.03 nN and predominately due to unbinding of α5β1 integrin complexes with surface adsorbed fibronectin, as confirmed by blocking experiments using antibodies. Monophasic pulsed stimulation (50 μs pulse duration) superimposed on either an applied oxidation (+500) or reduction (−500 mV) constant voltage caused a significant decrease in the de-adhesion force by 30%-45% to values ranging from 0.34 to 0.43 …
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 …
Morphology Tuning Of Inorganic Nanomaterials Grown By Precipitation Through Control Of Electrolytic Dissociation And Supersaturation, Weihong Lai, Yunxiao Wang, Yong Wang, Minghong Wu, Jiazhao Wang, Hua-Kun Liu, Shulei Chou, Jun Chen, Shi Xue Dou
Morphology Tuning Of Inorganic Nanomaterials Grown By Precipitation Through Control Of Electrolytic Dissociation And Supersaturation, Weihong Lai, Yunxiao Wang, Yong Wang, Minghong Wu, Jiazhao Wang, Hua-Kun Liu, Shulei Chou, Jun Chen, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
The precise control of the morphology of inorganic materials during their synthesis is important yet challenging. Here we report that the morphology of a wide range of inorganic materials, grown by rapid precipitation from a metal cation solution, can be tuned during their crystallization from one- to three-dimensional (1D to 3D) structures without the need for capping agents or templates. This control is achieved by adjusting the balance between the electrolytic dissociation (α) of the reactants and the supersaturation (S) of the solutions. Low-α, weak electrolytes promoted the growth of anisotropic (1D and 2D) samples, with 1D materials favoured 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 …
Hydraulic Flushing In Soft Coal Sublayer: Gas Extraction Enhancement Mechanism And Field Application, Hao Zhang, Yuanping Cheng, Liang Yuan, Liang Wang, Zhejun Pan
Hydraulic Flushing In Soft Coal Sublayer: Gas Extraction Enhancement Mechanism And Field Application, Hao Zhang, Yuanping Cheng, Liang Yuan, Liang Wang, Zhejun Pan
Faculty of Engineering and Information Sciences - Papers: Part B
In China, one or several ultrathin soft coal sublayers are widely developed in the coal seam. Therefore, a method of using hydraulic flushing in soft sublayer to enhance the gas extraction in these particular coal seams is developed in this work. We first established a new fully coupled gas extraction model by combing gas diffusion, gas flow, and a permeability model that considers the effect of stress change and plastic failure. By adopting this model, the gas extraction enhancement mechanism and its main influence factors were studied using the numerical simulation method based on the engineering and geological background in …
Factors Affecting Energy Efficiency Investments - A Case Study Of Bhutan, Roshan Chhetri, Young-Ho Lee, Duane A. Robinson, Sumitra Pokhrel
Factors Affecting Energy Efficiency Investments - A Case Study Of Bhutan, Roshan Chhetri, Young-Ho Lee, Duane A. Robinson, Sumitra Pokhrel
Faculty of Engineering and Information Sciences - Papers: Part B
Energy efficiency is providing the same services consuming less energy. Less energy means less energy bill and less greenhouse emissions. Bhutan presents a unique scenario in promoting the use of energy efficiency equipment and investments. Bhutan enjoys availability of adequate low cost hydropower energy resource that is green and clean and enjoys cheap electrical energy. To aggravate the situation, the domestic tariffs are subsidized and even free up to 100 units in rural parts of the country. Export tariffs are determined independently according to entirely different principles. However for cooking, Bhutan imports LPG (Liquefied Petroleum Gas) from India. With increasing …
Two-Dimensional Solid-State Array Detectors: A Technique For In Vivo Dose Verification In A Variable Effective Area, Kananan Utitsarn, Giordano Biasi, Nauljun Stansook, Z A. Alrowaili, Marco Petasecca, Martin G. Carolan, Vladimir Perevertaylo, Wolfgang Tome, Tomas Kron, Michael L. F Lerch, Anatoly B. Rosenfeld
Two-Dimensional Solid-State Array Detectors: A Technique For In Vivo Dose Verification In A Variable Effective Area, Kananan Utitsarn, Giordano Biasi, Nauljun Stansook, Z A. Alrowaili, Marco Petasecca, Martin G. Carolan, Vladimir Perevertaylo, Wolfgang Tome, Tomas Kron, Michael L. F Lerch, Anatoly B. Rosenfeld
Faculty of Engineering and Information Sciences - Papers: Part B
Purpose:We introduce a technique that employs a 2D detector in transmission mode (TM) to verify dose maps at a depth of dmaxin Solid Water. TM measurements, when taken at a different surface‐to‐detector distance (SDD), allow for the area at dmax(in which the dose map is calculated) to be adjusted.Methods:We considered the detector prototype"MP512"(an array of 512 diode‐sensitive volumes, 2 mm spatial resolution). Measurements in transmission mode were taken at SDDs in the range from 0.3 to 24 cm. Dose mode (DM) measurements were made at dmaxin Solid Water. We considered radiation fields in the range from 2x2cm2to 10x10 cm2, produced …
3-E Analysis And Optimization Of An Organic Rankine Flash Cycle Integrated With A Pem Fuel Cell And Geothermal Energy, Zhixiong Li, Shoaib Khanmohammadi, Saber Khanmohammadi, Abdullah Al-Rashed, Pouria Ahmadi, Masoud Afrand
3-E Analysis And Optimization Of An Organic Rankine Flash Cycle Integrated With A Pem Fuel Cell And Geothermal Energy, Zhixiong Li, Shoaib Khanmohammadi, Saber Khanmohammadi, Abdullah Al-Rashed, Pouria Ahmadi, Masoud Afrand
Faculty of Engineering and Information Sciences - Papers: Part B
2019 Hydrogen Energy Publications LLC The current research deals with thermodynamic and economic analyses and optimization of a geothermal system integrated with organic Rankine flash cycle (ORFC) and a polymer electrolyte membrane fuel cell (PEM-FC). A thermodynamic model for ORFC and PEM-FC is developed to investigate employing the PEM-FC in a combined geothermal ORFC. A comparative study is carried out to determine the effect of applying PEM-FC in a geothermal based ORFC. The validation of PEM-FC simulation with experimental data from the literature shows a good agreement. The results of numerical modeling indicate that using the rejected heat in the …
Enhancing Goldreich, Goldwasser And Halevi's Scheme With Intersecting Lattices, Arnaud Sipasseuth, Thomas Plantard, Willy Susilo
Enhancing Goldreich, Goldwasser And Halevi's Scheme With Intersecting Lattices, Arnaud Sipasseuth, Thomas Plantard, Willy Susilo
Faculty of Engineering and Information Sciences - Papers: Part B
We present a technique to enhance the security of the Goldreich, Goldwasser and Halevi (GGH) scheme. The security of GGH has practically been broken by lattice reduction techniques. Those attacks are successful due to the structure of the basis used in the secret key. In this work, we aim to present a new technique to alleviate this problem by modifying the public key which hides the structure of the corresponding private key. We intersect the initial lattice with a random one while keeping the initial lattice as our secret key and use the corresponding result of the intersection as the …
Experimental Testing And Modelling Of A Rotary Variable Stiffness And Damping Shock Absorber Using Magnetorheological Technology, Lei Deng, Shuaishuai Sun, Matthew Christie, Jian Yang, Donghong Ning, Xiaojing Zhu, Haiping Du, Shiwu Zhang, Weihua Li
Experimental Testing And Modelling Of A Rotary Variable Stiffness And Damping Shock Absorber Using Magnetorheological Technology, Lei Deng, Shuaishuai Sun, Matthew Christie, Jian Yang, Donghong Ning, Xiaojing Zhu, Haiping Du, Shiwu Zhang, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part B
This article presents a novel rotary shock absorber which combines the abilities of variable stiffness and variable damping by assembling a set of two magnetorheological damping units, one of which being placed in series with a rubber spring. This allows the damping and stiffness to be controlled independently by the internal damping and the external damping units, respectively. A test bench was established to verify the variable stiffness and damping functionality. The experimental results for variable damping test, variable stiffness test and co-working test are presented. At the amplitude of 10° and the frequency 0.5 Hz, increases of 141.6% and …
The Vulnerability Of Multiplicative Noise Protection To Correlation-Attacks On Continuous Microdata, Yue Ma, Yan-Xia Lin, Rathin Sarathy
The Vulnerability Of Multiplicative Noise Protection To Correlation-Attacks On Continuous Microdata, Yue Ma, Yan-Xia Lin, Rathin Sarathy
Faculty of Engineering and Information Sciences - Papers: Part B
When multiplicative noises are used to protect values of a sensitive attribute in a microdata, it is frequently assumed that data intruders use the noise-multiplied value to estimate the corresponding unobservable original value of a target record. In this paper, we show that, data intruders could easily construct another estimate instead of using the noise-multiplied value to attack an original value. The new estimate, namely "correlation-attack" estimate, is obtained by exploiting the potentially high correlation between the noise-multiplied data and the original data. We provide a detailed comparison between the two estimates (noise-multiplied value and the correlation-attack estimate) by comparing …
A Case Study On Pricing Foreign Exchange Options Using The Modified Craig-Sneyd Adi Scheme, Chittaranjan Mishra, Xiaoping Lu
A Case Study On Pricing Foreign Exchange Options Using The Modified Craig-Sneyd Adi Scheme, Chittaranjan Mishra, Xiaoping Lu
Faculty of Engineering and Information Sciences - Papers: Part B
One of the prominent alternating direction implicit (ADI) schemes for numerically pricing financial options, the modified Craig-Sneyd scheme, is put to test for its reliability and efficiency for solving non-trivial problems with empirical market data. The Heston equation for pricing foreign exchange options of European style, a two-dimensional convection-diffusion-reaction equation with a mixed derivative term, is numerically solved for various parameter values observed in the market by employing the said scheme. Numerical stability and convergence issues of this scheme is compared with another popular Hundsdorfer-Verwer ADI scheme. From among a total of 56 options on 8 currency pairs, it is …