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Articles 331 - 360 of 4868

Full-Text Articles in Physical Sciences and Mathematics

Metal-Organic Framework-Derived One-Dimensional Porous Or Hollow Carbon-Based Nanofibers For Energy Storage And Conversion, Chaohai Wang, Yusuf Valentino Kaneti, Yoshio Bando, Jianjian Lin, Chao Liu, Jiansheng Li, Yusuke Yamauchi Jan 2018

Metal-Organic Framework-Derived One-Dimensional Porous Or Hollow Carbon-Based Nanofibers For Energy Storage And Conversion, Chaohai Wang, Yusuf Valentino Kaneti, Yoshio Bando, Jianjian Lin, Chao Liu, Jiansheng Li, Yusuke Yamauchi

Australian Institute for Innovative Materials - Papers

Metal organic framework (MOF)-derived nanoporous carbons (NPCs) have been proposed as promising electrode materials for energy storage and conversion devices. However, MOF-derived NPCs typically suffer from poor electrical conductivity due to the lack of connectivity between these particles and a micropore-dominated storage mechanism, which hinder mass and electron transfer, thereby leading to poor electrochemical performance. In recent years, one-dimensional (1D) MOF-derived carbon nanostructures obtained using an electrospinning method have emerged as promising materials for both electrochemical energy storage (EES) and energy conversion applications. In this mini review, the recent progress in the development of MOF-derived 1D porous or hollow carbon …

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Formation Of Hollow Mos2/Carbon Microspheres For High Capacity And High Rate Reversible Alkali-Ion Storage, Tianyu Yang, Ji Liang, Irin Sultana, Md. Mokhlesur Rahman, Michael J. Monteiro, Ying I. Chen, Zongping Shao, S Ravi. P Silva, Jian Liu Jan 2018

Formation Of Hollow Mos2/Carbon Microspheres For High Capacity And High Rate Reversible Alkali-Ion Storage, Tianyu Yang, Ji Liang, Irin Sultana, Md. Mokhlesur Rahman, Michael J. Monteiro, Ying I. Chen, Zongping Shao, S Ravi. P Silva, Jian Liu

Australian Institute for Innovative Materials - Papers

Nanocomposites of carbon and molybdenum disulfide have attracted much attention due to their significant potential in energy conversion and storage applications. However, the preparation of these 0-D MoS 2 /carbon composites with controllable structures and desirable properties remains a major manufacturing challenge, particularly at low cost suitable for scaling-up. Here, we report a facile solution-based method to prepare porous hierarchical 0-D MoS 2 /carbon nanocomposites with vertical MoS 2 growth on a hollow carbon support, suitable for the electrochemical storage of lithium and sodium ions. The vertically aligned MoS 2 /hollow carbon material shows excellent performance in the storage of …

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Towards Thermally Stable High Performance Lithium-Ion Batteries: The Combination Of A Phosphonium Cation Ionic Liquid And A 3d Porous Molybdenum Disulfide/Graphene Electrode, Yu Ge, Cristina Pozo-Gonzalo, Yong Zhao, Xiaoteng Jia, Robert L. Kerr, Caiyun Wang, Patrick Howlett, Gordon G. Wallace Jan 2018

Towards Thermally Stable High Performance Lithium-Ion Batteries: The Combination Of A Phosphonium Cation Ionic Liquid And A 3d Porous Molybdenum Disulfide/Graphene Electrode, Yu Ge, Cristina Pozo-Gonzalo, Yong Zhao, Xiaoteng Jia, Robert L. Kerr, Caiyun Wang, Patrick Howlett, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

We report a thermally stable high-performance lithium battery using an electrochemically synthesized three-dimensional porous molybdenum disulfide/graphene composite electrode and a phosphonium-based ionic liquid (IL) electrolyte. Benefiting from the structural merits of the chosen electrode and the thermal stability of the electrolyte, the cell coupled with a Li foil exhibits excellent rate performance and cycling capability at room temperature; and that is retained with an even better rate capability at an elevated temperature of 50 8C. This work may provide a new avenue for the development of safe and high performance lithium-ion batteries at high temperature.

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Solution-Grown Dendritic Pt-Based Ternary Nanostructures For Enhanced Oxygen Reduction Reaction Functionality, Gerard Leteba, David R. G Mitchell, Pieter Levecque, Candace Lang Jan 2018

Solution-Grown Dendritic Pt-Based Ternary Nanostructures For Enhanced Oxygen Reduction Reaction Functionality, Gerard Leteba, David R. G Mitchell, Pieter Levecque, Candace Lang

Australian Institute for Innovative Materials - Papers

Nanoalloys with anisotropic morphologies of branched and porous internal structures show great promise in many applications as high performance materials. Reported synthetic approaches for branched alloy nanostructures are, however, limited by the synthesis using a seed-growth process. Here, we demonstrate a conveniently fast and one-pot solution-phase thermal reduction strategy yielding nanoalloys of Pt with various solute feed ratios, exhibiting hyperbranched morphologies and good dispersity. When Pt was alloyed with transition metals (Ni, Co, Fe), we observed well-defined dendritic nanostructures in PtNi, PtCo and Pt(NiCo), but not in PtFe, Pt(FeNi) or Pt(FeCo) due to the steric hindrance of the trivalent Fe(acac)3precursor …

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Facile Synthesis Of Palladium-Nanoparticle-Embedded N-Doped Carbon Fibers For Electrochemical Sensing, Kyubin Shim, Zhongli Wang, Tasnima Haque Mou, Yoshio Bando, Abdulmohsen Alshehri, Jeonghun Kim, Md. Shahriar Al Hossain, Yusuke Yamauchi, Jung Ho Kim Jan 2018

Facile Synthesis Of Palladium-Nanoparticle-Embedded N-Doped Carbon Fibers For Electrochemical Sensing, Kyubin Shim, Zhongli Wang, Tasnima Haque Mou, Yoshio Bando, Abdulmohsen Alshehri, Jeonghun Kim, Md. Shahriar Al Hossain, Yusuke Yamauchi, Jung Ho Kim

Australian Institute for Innovative Materials - Papers

2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. In recent years, there have been many studies on metal/carbon hybrid materials for electrochemical applications. However, reducing the metal content in catalysts is still a challenge. Here, a facile synthesis of palladium (Pd) nanoparticle-embedded N-doped carbon fibers (Pd/N-C) through electropolymerization and reduction methods is demonstrated. The as-prepared Pd/N-C contains only 1.5wt% Pd. Under optimal conditions, bisphenolA is detected by using amperometry in two dynamic ranges from 0.1 to 10μm and from 10 to 200μm, and the obtained correlation coefficients are close to 0.9836 and 0.9987, respectively. The detection limit (DL) for bisphenolA …

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Efficient Photocatalytic Degradation Of Malachite Green In Seawater By The Hybrid Of Zinc-Oxide Nanorods Grown On Three-Dimensional (3d) Reduced Graphene Oxide(Rgo)/Ni Foam, Qing Wang, Chaoyue Cai, Mingyan Wang, Qian Guo, Biao Wang, Weina Luo, Yujuan Wang, Chenyan Zhang, Lihua Zhou, Dongen Zhang, Zhi Wei Tong, Yuqing Liu, Jun Chen Jan 2018

Efficient Photocatalytic Degradation Of Malachite Green In Seawater By The Hybrid Of Zinc-Oxide Nanorods Grown On Three-Dimensional (3d) Reduced Graphene Oxide(Rgo)/Ni Foam, Qing Wang, Chaoyue Cai, Mingyan Wang, Qian Guo, Biao Wang, Weina Luo, Yujuan Wang, Chenyan Zhang, Lihua Zhou, Dongen Zhang, Zhi Wei Tong, Yuqing Liu, Jun Chen

Australian Institute for Innovative Materials - Papers

A hybrid of ZnO nanorods grown onto three-dimensional (3D) reduced graphene oxide (RGO)@Ni foam (ZnO/RGO@NF) is synthesized by a facile hydrothermal method. The as-prepared hybrid material is physically characterized by SEM, XRD, Raman, and X-ray photoelectron spectroscopy (XPS).When the as-prepared 3D hybrid is investigated as a photocatalyst, it demonstrates significant high photocatalytic activity for the degradation of methylene blue (MB), rhodamine (RhB), and mixed MB/RhB as organic dye pollutants. In addition, the practical application and the durability of the as-prepared catalyst to degradation of malachite green (MG) in seawater are firstly assessed in a continuous flow system. The catalyst shows …

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Progress And Future Prospects Of High-Voltage And High-Safety Electrolytes In Advanced Lithium Batteries: From Liquid To Solid Electrolytes, Shimou Chen, Kaihua Wen, Juntian Fan, Yoshio Bando, Dmitri Golberg Jan 2018

Progress And Future Prospects Of High-Voltage And High-Safety Electrolytes In Advanced Lithium Batteries: From Liquid To Solid Electrolytes, Shimou Chen, Kaihua Wen, Juntian Fan, Yoshio Bando, Dmitri Golberg

Australian Institute for Innovative Materials - Papers

Developing the next-generation high-energy density and safe batteries is of prime importance to meet the emerging demands in electronics, automobile industries and various energy storage systems. High-voltage lithium-ion batteries (LIBs) and solid-state batteries (SSBs) are two main directions attracting increasing interest in recent years, due to their potential applications in the near future. In both kinds of batteries, the electrolytes play a pivotal role but also create several bottleneck problems. In this review, recent progress in designing electrolytes for high-voltage LIBs and SSBs is summarized. First, the solvents, additives, ionic liquids and superconcentrated salts strategies for constructing high-voltage liquid electrolytes …

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Thickness-Dependent Electronic Structure In Wte2 Thin Films, Feixiang Xiang, Ashwin Srinivasan, Z Du, Oleh Klochan, Shi Xue Dou, Alexander Hamilton, Xiaolin Wang Jan 2018

Thickness-Dependent Electronic Structure In Wte2 Thin Films, Feixiang Xiang, Ashwin Srinivasan, Z Du, Oleh Klochan, Shi Xue Dou, Alexander Hamilton, Xiaolin Wang

Australian Institute for Innovative Materials - Papers

We study the electronic structure of WTe2 thin films with different thicknesses. High-quality thin-film samples are obtained with carrier mobility up to 5000 cm2 V−1 s−1, which enables us to resolve the four main Fermi pockets from Shubnikov-de Haas (SdH) oscillations. Angle-resolved SdH oscillations show that the WTe2 thin films cross from three-dimensional to two-dimensional electronic systems at a thickness of ∼ 20 nm. Using the field effect, the nature of the Fermi pockets in thin-film WTe2 is identified, and the evolution of SdH oscillation frequencies is traced over different sample thicknesses. It is found that the frequencies dramatically decrease …

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Synergistic Amplification Of Catalytic Hydrogen Generation By A Thin-Film Conducting Polymer Composite, Mohammed Alsultan, Jaecheol Choi, Rouhollah Jalili, Pawel W. Wagner, Gerhard F. Swiegers Jan 2018

Synergistic Amplification Of Catalytic Hydrogen Generation By A Thin-Film Conducting Polymer Composite, Mohammed Alsultan, Jaecheol Choi, Rouhollah Jalili, Pawel W. Wagner, Gerhard F. Swiegers

Australian Institute for Innovative Materials - Papers

This work reports a composite of polyIJ3,4-ethylenedioxythiophene) (PEDOT) that is notably more catalytically active for hydrogen generation than the industry-standard benchmark catalyst, Pt, under the same conditions. A PEDOT thin-film containing nanoparticulate Ni (nano-Ni) and reduced graphene oxide (rGO) in the specific molar ratio of 5.6 (C; PEDOT) : 1 (Ni) : 5.2 (C; other), (photo)catalytically generated H2 at 3.6 mA cm−2 (including ca. 0.2 mA cm−2 due to the light illumination) after 3 h at −0.75 V (vs. Ag/AgCl) in 0.05 M H2SO4/0.2 M Na2SO4 under 0.25 sun. A control nano-Ni/rGO film containing the same quantities of nano-Ni and …

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Progress And Future Perspectives On Li(Na)-Co2 Batteries, Fengshi Cai, Zhe Hu, Shulei Chou Jan 2018

Progress And Future Perspectives On Li(Na)-Co2 Batteries, Fengshi Cai, Zhe Hu, Shulei Chou

Australian Institute for Innovative Materials - Papers

Li(Na)-CO2 batteries are attracting significant research attention due to contemporary energy and environmental issues. Li(Na)-CO2 batteries make possible the utilization of CO2 and open up a new avenue for energy conver-sion and storage. Research on this system is currently in its infancy, and its development is still faced with many challenges in terms of high charge potential, weak rate capability, and poor cyclability. Moreover, the reaction mechanism in the battery is still unclear and hard to determine, due to the generation of carbon along with metal carbonates on the cathode. In this review, the authors present the fundamentals and the …

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Porous Nanozymes: The Peroxidase-Mimetic Activity Of Mesoporous Iron Oxide For The Colorimetric And Electrochemical Detection Of Global Dna Methylation, Ripon Bhattacharjee, Shunsuke Tanaka, Sofia Moriam, Mostafa Kamal Masud, Jianjian Lin, Saad M. Alshehri, Tansir Ahamad, Rahul R. Salunkhe, Nam-Trung Nguyen, Yusuke Yamauchi, Md. Shahriar Al Hossain, Muhammad J. A Shiddiky Jan 2018

Porous Nanozymes: The Peroxidase-Mimetic Activity Of Mesoporous Iron Oxide For The Colorimetric And Electrochemical Detection Of Global Dna Methylation, Ripon Bhattacharjee, Shunsuke Tanaka, Sofia Moriam, Mostafa Kamal Masud, Jianjian Lin, Saad M. Alshehri, Tansir Ahamad, Rahul R. Salunkhe, Nam-Trung Nguyen, Yusuke Yamauchi, Md. Shahriar Al Hossain, Muhammad J. A Shiddiky

Australian Institute for Innovative Materials - Papers

No abstract provided.

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A Porphyrin/Graphene Framework: A Highly Efficient And Robust Electrocatalyst For Carbon Dioxide Reduction, Jaecheol Choi, Pawel W. Wagner, Rouhollah Jalili, Jeonghun Kim, Douglas R. Macfarlane, Gordon G. Wallace, David L. Officer Jan 2018

A Porphyrin/Graphene Framework: A Highly Efficient And Robust Electrocatalyst For Carbon Dioxide Reduction, Jaecheol Choi, Pawel W. Wagner, Rouhollah Jalili, Jeonghun Kim, Douglas R. Macfarlane, Gordon G. Wallace, David L. Officer

Australian Institute for Innovative Materials - Papers

Developing immobilized molecular complexes, which demonstrate high product efficiencies at low overpotential in the electrochemical reduction of CO2in aqueous media, is essential for the practical production of reduction products. In this work, a simple and facile self-assembly method is demonstrated by electrostatic interaction and π-π stacking for the fabrication of a porphyrin/graphene framework (FePGF) composed of Fe(III) tetraphenyltrimethylammonium porphyrin and reduced liquid crystalline graphene oxide that can be utilized for the electrocatalytic reduction of CO2to CO on a glassy carbon electrode in aqueous electrolyte. The FePGF results in an outstanding robust catalytic performance for the production of CO with 97.0% …

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A Smart Cyto-Compatible Asymmetric Polypyrrole Membrane For Salinity Power Generation, Changchun Yu, Xuanbo Zhu, Caiyun Wang, Yahong Zhou, Xiaoteng Jia, Lei Jiang, Xiao Liu, Gordon G. Wallace Jan 2018

A Smart Cyto-Compatible Asymmetric Polypyrrole Membrane For Salinity Power Generation, Changchun Yu, Xuanbo Zhu, Caiyun Wang, Yahong Zhou, Xiaoteng Jia, Lei Jiang, Xiao Liu, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

Inspired by biological channels that occur in nature, smart biomimetic nanofluidic systems have been built to enable salinity power harvesting. However, most of these smart membranes are composites containing two incompatible components that require sophisticated fabrication techniques, thus limiting practical applications. Here, a single component polypyrrole membrane has been developed via a simple self-assembly process. The membrane provides asymmetric wettability on either side, cytocompatibility and an electrochemically tuneable ionic conductance. The ability of this membrane to capture energy arising from a salinity gradient has been demonstrated. The system can provide a stable current density over 16 h using artificial seawater …

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Advanced Fabrication Approaches To Controlled Delivery Systems For Epilepsy Treatment, Gilles Van Tienderen, Marius Berthel, Zhilian Yue, Mark J. Cook, Xiao Liu, Stephen T. Beirne, Gordon G. Wallace Jan 2018

Advanced Fabrication Approaches To Controlled Delivery Systems For Epilepsy Treatment, Gilles Van Tienderen, Marius Berthel, Zhilian Yue, Mark J. Cook, Xiao Liu, Stephen T. Beirne, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

Epilepsy is a chronic brain disease characterized by unprovoked seizures, which can have severe consequences including loss of awareness and death. Currently, 30% of epileptic patients do not receive adequate seizure alleviation from oral routes of medication. Over the last decade, local drug delivery to the focal area of the brain where the seizure originates has emerged as a potential alternative and may be achieved through the fabrication of drug-loaded polymeric implants for controlled on-site delivery. Areas covered: This review presents an overview of the latest advanced fabrication techniques for controlled drug delivery systems for refractory epilepsy treatment. Recent advances …

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Effect Of Alf3-Coated Li4ti5o12 On The Performance And Function Of The Lini0.5mn1.5o4||Li4ti5o12 Full Battery-An In-Operando Neutron Powder Diffraction Study, Gemeng Liang, Anoop Somanathan Pillai Sushamakumari Amma, Vanessa K. Peterson, Kuan-Yu Ko, Chia-Ming Chang, Cheng-Zhang Lu, Chia-Erh Liu, Shih-Chieh Liao, Jin-Ming Chen, Zaiping Guo, Wei Kong Pang Jan 2018

Effect Of Alf3-Coated Li4ti5o12 On The Performance And Function Of The Lini0.5mn1.5o4||Li4ti5o12 Full Battery-An In-Operando Neutron Powder Diffraction Study, Gemeng Liang, Anoop Somanathan Pillai Sushamakumari Amma, Vanessa K. Peterson, Kuan-Yu Ko, Chia-Ming Chang, Cheng-Zhang Lu, Chia-Erh Liu, Shih-Chieh Liao, Jin-Ming Chen, Zaiping Guo, Wei Kong Pang

Australian Institute for Innovative Materials - Papers

The LiNi0.5Mn1.5O4||Li4Ti5O12(LMNO||LTO) battery possesses a relatively-high energy density and cycle performance, with further enhancement possible by application of an AlF3coating on the LTO electrode particles. We measure the performance enhancement to the LMNO||LTO battery achieved by a AlF3coating on the LTO particles through electrochemical testing and use in-operando neutron powder diffraction to study the changes to the evolution of the bulk crystal structure during battery cycling. We find that the AlF3coating along with parasitic Al doping slightly increases capacity and greatly increases rate capability of the LTO electrode, as well as significantly reducing capacity loss on cycling, facilitating a gradual …

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Giant Enhancement Of The Figure-Of-Merit Over A Broad Temperature Range In Nano-Boron Incorporated Cu2se, Sheik Md. Kazi Nazrul Islam, Meng Li, Umut Aydemir, Xun Shi, Lidong Chen, G Jeffrey Snyder, Xiaolin Wang Jan 2018

Giant Enhancement Of The Figure-Of-Merit Over A Broad Temperature Range In Nano-Boron Incorporated Cu2se, Sheik Md. Kazi Nazrul Islam, Meng Li, Umut Aydemir, Xun Shi, Lidong Chen, G Jeffrey Snyder, Xiaolin Wang

Australian Institute for Innovative Materials - Papers

Superionic conductors in the chalcogenide-based copper selenide family have been considered as a promising class of thermoelectric materials, which offer great prospects for converting ubiquitous waste heat into highly demanded electrical energy. Further improvement of the thermoelectric figure-of-merit, zT, for Cu2Se is very desirable for its practical applications. Since any enhancement in electrical conductivity is often accompanied by a reduction in the Seebeck coefficient or thermal power or vice versa, a significant reduction of thermal conductivity becomes an important strategy for improvement of zT. In this work, we demonstrate that insulating-boron nano-particle inclusion in Cu2Se has little effect on the …

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A Sequential Debonding Fracture Model For Hydrogen-Bonded Hydrogels, Hai Xin, Farshad Oveissi, Sina Naficy, Geoffrey M. Spinks Jan 2018

A Sequential Debonding Fracture Model For Hydrogen-Bonded Hydrogels, Hai Xin, Farshad Oveissi, Sina Naficy, Geoffrey M. Spinks

Australian Institute for Innovative Materials - Papers

Hydrogen bonds are known to play an important role in prescribing the mechanical performance of certain hydrogels such as polyether-based polyurethanes. The quantitative contribution of hydrogen bonds to the toughness of polymer networks, however, has not been elucidated to date. Here, a new physical model is developed to predict the threshold fracture energies of hydrogels physically crosslinked via hydrogen bonds. The model is based on consecutive and sequential dissociation of hydrogen-bonded crosslinks during crack propagation. It is proposed that the scission of hydrogen bonds during crack propagation allows polymer strands in the deformation zone to partially relax and release stored …

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Atomic Cobalt As An Efficient Electrocatalyst In Sulfur Cathodes For Superior Room-Temperature Sodium-Sulfur Batteries, Binwei Zhang, Tian Sheng, Yundan Liu, Yunxiao Wang, Lei Zhang, Weihong Lai, Li Wang, Jianping Yang, Qinfen Gu, Shulei Chou, Hua-Kun Liu, Shi Xue Dou Jan 2018

Atomic Cobalt As An Efficient Electrocatalyst In Sulfur Cathodes For Superior Room-Temperature Sodium-Sulfur Batteries, Binwei Zhang, Tian Sheng, Yundan Liu, Yunxiao Wang, Lei Zhang, Weihong Lai, Li Wang, Jianping Yang, Qinfen Gu, Shulei Chou, Hua-Kun Liu, Shi Xue Dou

Australian Institute for Innovative Materials - Papers

The low-cost room-temperature sodium-sulfur battery system is arousing extensive interest owing to its promise for large-scale applications. Although significant efforts have been made, resolving low sulfur reaction activity and severe polysulfide dissolution remains challenging. Here, a sulfur host comprised of atomic cobalt-decorated hollow carbon nanospheres is synthesized to enhance sulfur reactivity and to electrocatalytically reduce polysulfide into the final product, sodium sulfide. The constructed sulfur cathode delivers an initial reversible capacity of 1081 mA h g−1 with 64.7% sulfur utilization rate; significantly, the cell retained a high reversible capacity of 508 mA h g−1 at 100 mA g−1 after 600 …

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Silicon As A Ubiquitous Contaminant In Graphene Derivatives With Significant Impact On Device Performance, Rouhollah Jalili, Dorna Esrafilzadeh, Seyed Hamed Aboutalebi, Ylias M. Sabri, Ahmad E. Kandjani, Suresh K. Bhargava, Enrico Della Gaspera, Thomas R. Gengenbach, Ashley Walker, Yunfeng Chao, Caiyun Wang, Hossein Alimadadi, David R. G Mitchell, David L. Officer, Douglas R. Macfarlane, Gordon G. Wallace Jan 2018

Silicon As A Ubiquitous Contaminant In Graphene Derivatives With Significant Impact On Device Performance, Rouhollah Jalili, Dorna Esrafilzadeh, Seyed Hamed Aboutalebi, Ylias M. Sabri, Ahmad E. Kandjani, Suresh K. Bhargava, Enrico Della Gaspera, Thomas R. Gengenbach, Ashley Walker, Yunfeng Chao, Caiyun Wang, Hossein Alimadadi, David R. G Mitchell, David L. Officer, Douglas R. Macfarlane, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

Silicon-based impurities are ubiquitous in natural graphite. However, their role as a contaminant in exfoliated graphene and their influence on devices have been overlooked. Herein atomic resolution microscopy is used to highlight the existence of silicon-based contamination on various solution-processed graphene. We found these impurities are extremely persistent and thus utilising high purity graphite as a precursor is the only route to produce silicon-free graphene. These impurities are found to hamper the effective utilisation of graphene in whereby surface area is of paramount importance. When non-contaminated graphene is used to fabricate supercapacitor microelectrodes, a capacitance value closest to the predicted …

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Barium- And Strontium-Containing Anode Materials Toward Ceria-Based Solid Oxide Fuel Cells With High Open Circuit Voltages, Zheng Gong, Wenping Sun, Zongzi Jin, Lina Miao, Wei Liu Jan 2018

Barium- And Strontium-Containing Anode Materials Toward Ceria-Based Solid Oxide Fuel Cells With High Open Circuit Voltages, Zheng Gong, Wenping Sun, Zongzi Jin, Lina Miao, Wei Liu

Australian Institute for Innovative Materials - Papers

Developing ceria-based solid oxide fuel cells (SOFCs) with low cost, high power density, and, in particular, high working efficiency is of great significance to practical applications. In this work, Ba- and Sr-containing composites (Ni-Ba1-xSrxCe0.7Zr0.1Y0.2O3−δ) were for the first time proposed and evaluated as anodes for Ce0.8Sm0.2O1.9 (SDC)-based SOFCs. Both Ba and Sr diffusion occurs at elevated temperatures during fabricating anode-supported half-cells; correspondingly, a thin electron-blocking interlayer is formed in situ at the anode/electrolyte interface. The presence of Ba ensures the formation of a …

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Molecular-Scale Functionality On Graphene To Unlock The Energy Capabilities Of Metal Hydrides For High-Capacity Lithium-Ion Batteries, Guanglin Xia, Baoping Zhang, Xiaowei Chen, Dalin Sun, Zaiping Guo, Fuxin Liang, Weidong Zou, Zhenzhong Yang, Xuebin Yu Jan 2018

Molecular-Scale Functionality On Graphene To Unlock The Energy Capabilities Of Metal Hydrides For High-Capacity Lithium-Ion Batteries, Guanglin Xia, Baoping Zhang, Xiaowei Chen, Dalin Sun, Zaiping Guo, Fuxin Liang, Weidong Zou, Zhenzhong Yang, Xuebin Yu

Australian Institute for Innovative Materials - Papers

Metal hydrides have attracted great intentions as anodes for lithium-ion batteries (LIBs) due to their extraordinary theoretical capacity. It is an unsolved challenge, however, to achieve high capacity with stable cyclability, owing to their insulating property and large volume expansion upon lithium storage. Here, we introduce self-initiated polymerization to realize molecular-scale functionality of metal hydrides with conductive polymer, that is, polythiophene (PTh), on graphene, leading to the formation of MgH2@PTh core−shell nanoparticles on graphene. The nanoscale characteristics of MgH2 not only relieve the induced stress upon volume changes but also allow fast diffusivity and high reactivity for Li-ion transport. More …

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Construction Of Hierarchical Mose2 Hollow Structures And Its Effecton Electrochemical Energy Storage And Conversion, Sha Hu, Qingqing Jiang, Shuoping Ding, Ye Liu, Zuozuo Wu, Zhengxi Huang, Tengfei Zhou, Zaiping Guo, Juncheng Hu Jan 2018

Construction Of Hierarchical Mose2 Hollow Structures And Its Effecton Electrochemical Energy Storage And Conversion, Sha Hu, Qingqing Jiang, Shuoping Ding, Ye Liu, Zuozuo Wu, Zhengxi Huang, Tengfei Zhou, Zaiping Guo, Juncheng Hu

Australian Institute for Innovative Materials - Papers

Metal selenides have attracted increased attentionas promising electrode materials for electrochemical energy storageand conversion systems including metal-ion batteries and watersplitting. However, their practical application is greatly hindered bycollapse of the microstructure, thus leading to performance fading.Tuning the structure at nanoscale of these materials is an effectivestrategy to address the issue. Herein, we craft MoSe2withhierarchical hollow structures via a facile bubble-assistedsolvothermal method. The temperature-related variations of thehollow interiors are studied, which can be presented as solid, yolk−shell, and hollow spheres, respectively. Under the simultaneousaction of the distinctive hollow structures and interconnectionsamong the nanosheets, more intimate contacts between MoSe2and electrolyte can be …

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Solid-State Bonding Of Bulk Pbte To Nickel Electrode For Thermoelectric Modules, Xavier Reales Ferreres, Azdiar Adil Gazder, Andrew Manettas, Sima Aminorroaya-Yamini Jan 2018

Solid-State Bonding Of Bulk Pbte To Nickel Electrode For Thermoelectric Modules, Xavier Reales Ferreres, Azdiar Adil Gazder, Andrew Manettas, Sima Aminorroaya-Yamini

Australian Institute for Innovative Materials - Papers

The efficiency of thermoelectric generators is defined by the thermoelectric performance of materials, as expressed by the thermoelectric figure-of-merit, and their contacts with electrodes. Lead chalcogenide thermoelectric materials and, in particular, PbTe perform well in the 500−900 K temperature range. Here, we have successfully bonded bulk PbTe to Ni electrode to generate a diffusion barrier, avoiding continuous reaction of the thermoelectric legs and conducting electrodes at the operating temperature. We have modified the commonly used spark plasma sintering assembly method to join the Ni electrode to bulk PbTe by driving the total supplied electrical current through the Ni and PbTe …

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A Self-Organized Learning Model For Anomalies Detection: Application To Elderly People, Nicolas R. Verstaevel, Jean-Pierre George, Carole Bernon, Marie-Pierre Gleizes Jan 2018

A Self-Organized Learning Model For Anomalies Detection: Application To Elderly People, Nicolas R. Verstaevel, Jean-Pierre George, Carole Bernon, Marie-Pierre Gleizes

SMART Infrastructure Facility - Papers

In a context of a rapidly growing population of elderly people, this paper introduces a novel method for behavioural anomaly detection relying on a self-organized learning process. This method first models the Circadian Activity Rhythm of a set of sensors and compares it to a nominal profile to determine variations in patients' activities. The anomalies are detected by a multi-agent system as a linear relation of those variations, weighted by influence parameters. The problem of adaptation to a particular patient then becomes the problem of learning the adequate influence parameters. Those influence parameters are self-adjusted, using feedback provided at any …

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Surface Modification Of Polyaniline Nanorods With Thiol-Terminated Poly(Ethylene Oxide), Brandon Ditullio, Cassandra J. Wright, Patricia Y. Hayes, Paul J. Molino, Timothy W. Hanks Jan 2018

Surface Modification Of Polyaniline Nanorods With Thiol-Terminated Poly(Ethylene Oxide), Brandon Ditullio, Cassandra J. Wright, Patricia Y. Hayes, Paul J. Molino, Timothy W. Hanks

Australian Institute for Innovative Materials - Papers

Electrochemically grown polyaniline (PAni) thin films have been shown to react efficiently with thiols, which can dramatically change the surface properties of the material without significantly impacting bulk conductivity. Such films, however, are difficult to process and are unsuitable for many applications. Here, we demonstrate the grafting of thiol-terminated poly(ethylene oxide) (PEG-SH) of various molecular weights onto PAni nanorods. The resulting materials are characterized by spectroscopic, microscopic, and thermal analytical methods to demonstrate the covalent attachment of the PEG polymers to the nanorods. The derivatized nanorods are water dispersible and maintain their original morphology and electroactivity. The number of thiols …

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Heat Transfer From Nanoparticles For Targeted Destruction Of Infectious Organisms, Michael Cortie, David L. Cortie, Victoria Timchenko Jan 2018

Heat Transfer From Nanoparticles For Targeted Destruction Of Infectious Organisms, Michael Cortie, David L. Cortie, Victoria Timchenko

Australian Institute for Innovative Materials - Papers

Whereas the application of optically or magnetically heated nanoparticles to destroy tumours is now well established, the extension of this concept to target pathogens has barely begun. Here we examine the challenge of targeting pathogens by this means and, in particular, explore the issues of power density and heat transfer. Depending on the rate of heating, either hyperthermia or thermoablation may occur. This division of the field is fundamental and implies very different sources of excitation and heat transfer for the two modes, and different strategies for their clinical application. Heating by isolated nanoparticles and by agglomerates of nanoparticles is …

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Tunable And Efficient Tin Modified Nitrogen-Doped Carbon Nanofibers For Electrochemical Reduction Of Aqueous Carbon Dioxide, Yong Zhao, Jiaojiao Liang, Caiyun Wang, Jianmin Ma, Gordon G. Wallace Jan 2018

Tunable And Efficient Tin Modified Nitrogen-Doped Carbon Nanofibers For Electrochemical Reduction Of Aqueous Carbon Dioxide, Yong Zhao, Jiaojiao Liang, Caiyun Wang, Jianmin Ma, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

Efficient and selective earth-abundant catalysts are highly desirable to drive the electrochemical conversion of CO2 into value-added chemicals. In this work, a low-cost Sn modified N-doped carbon nanofiber hybrid catalyst is developed for switchable CO2 electroreduction in aqueous medium via a straightforward electrospinning technique coupled with a pyrolysis process. The electrocatalytic performance can be tuned by the structure of Sn species on the N-doped carbon nanofibers. Sn nanoparticles drive efficient formate formation with a high current density of 11 mA cm−2 and a faradaic efficiency of 62% at a moderate overpotential of 690 mV. Atomically dispersed Sn spe-cies promote conversion …

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Broadband Photocarrier Dynamics And Nonlinear Absorption Of Pld-Grown Wte2semimetal Films, Wenbin Gao, Lei Huang, Jinlong Xu, Yequan Chen, Chunhui Zhu, Zhonghui Nie, Yao Li, Xuefeng Wang, Zhenda Xie, Shining Zhu, Jun Xu, Xiangang Wan, C Zhang, Yongbing Xu, Yi Shi, Fengqiu Wang Jan 2018

Broadband Photocarrier Dynamics And Nonlinear Absorption Of Pld-Grown Wte2semimetal Films, Wenbin Gao, Lei Huang, Jinlong Xu, Yequan Chen, Chunhui Zhu, Zhonghui Nie, Yao Li, Xuefeng Wang, Zhenda Xie, Shining Zhu, Jun Xu, Xiangang Wan, C Zhang, Yongbing Xu, Yi Shi, Fengqiu Wang

Australian Institute for Innovative Materials - Papers

WTe 2 is a unique material in the family of transition metal dichalcogenides and it has been proposed as a candidate for type-II Weyl semimetals. However, thus far, studies on the optical properties of this emerging material have been significantly hindered by the lack of large-area, high-quality WTe 2 materials. Here, we grow a centimeter-scale, highly crystalline WTe 2 ultrathin film (∼35 nm) by a pulsed laser deposition technique. Broadband pump-probe spectroscopy (1.2-2.5 μm) reveals a peculiar ultrafast optical response where an initial photo-bleaching signal (lasting ∼3 ps) is followed by a long-lived photoinduced absorption signature. Nonlinear absorption characterization using …

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Sub-50 Nm Iron-Nitrogen-Doped Hollow Carbon Sphere-Encapsulated Iron Carbide Nanoparticles As Efficient Oxygen Reduction Catalysts, Haibo Tan, Yunqi Li, Jeonghun Kim, Toshiaki Takei, Zhongli Wang, Xingtao Xu, Jie Wang, Yoshio Bando, Yong-Mook Kang, Jing Tang, Yusuke Yamauchi Jan 2018

Sub-50 Nm Iron-Nitrogen-Doped Hollow Carbon Sphere-Encapsulated Iron Carbide Nanoparticles As Efficient Oxygen Reduction Catalysts, Haibo Tan, Yunqi Li, Jeonghun Kim, Toshiaki Takei, Zhongli Wang, Xingtao Xu, Jie Wang, Yoshio Bando, Yong-Mook Kang, Jing Tang, Yusuke Yamauchi

Australian Institute for Innovative Materials - Papers

Sub-50 nm iron-nitrogen-doped hollow carbon sphere-encapsulated iron carbide nanoparticles (Fe 3 C-Fe,N/C) are synthesized by using a triblock copolymer of poly(styrene-b-2-vinylpyridine-b-ethylene oxide) as a soft template. Their typical features, including a large surface area (879.5 m 2 g -1 ), small hollow size (≈16 nm), and nitrogen-doped mesoporous carbon shell, and encapsulated Fe 3 C nanoparticles generate a highly active oxygen reduction reaction (ORR) performance. Fe 3 C-Fe,N/C hollow spheres exhibit an ORR performance comparable to that of commercially available 20 wt% Pt/C in alkaline electrolyte, with a similar half-wave potential, an electron transfer number close to 4, and lower …

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New Insights Into The Electrochemistry Of Magnesium Molybdate Hierarchical Architectures For High Performance Sodium Devices, Manickam Minakshi, David R. G Mitchell, Anji Munnangi, Anders Barlow, Maximilian Fichtner Jan 2018

New Insights Into The Electrochemistry Of Magnesium Molybdate Hierarchical Architectures For High Performance Sodium Devices, Manickam Minakshi, David R. G Mitchell, Anji Munnangi, Anders Barlow, Maximilian Fichtner

Australian Institute for Innovative Materials - Papers

Magnesium molybdate (MgMoO4), which possesses synergistic features combining both hierarchical plate-like nanomaterials and porous architectures, has been successfully synthesized through a facile combustion synthesis at a low temperature. The hierarchical architecture is characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), scanning transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) analyses. The as-obtained MgMoO4nanoplates showed a porous structure with a pore-size distribution ranging from 50 to 70 nm. This porosity provides an electron transport pathway and enhanced surface reaction kinetics. The binding energies measured for Mg 2p, Mo 3d, 3p and O 1s are consistent with the …

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