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Articles 61 - 90 of 197
Full-Text Articles in Physical Sciences and Mathematics
Controlled Synthesis Of Mesoporous Nitrogen-Doped Carbons With Highly Ordered Two-Dimensional Hexagonal Mesostructures And Their Chemical Activation, Abeer Enaiet Allah, Haibo Tan, Xingtao Xu, Ahmed Farghali, Mohamed Khedr, Abdulmohsen Alshehri, Yoshio Bando, Nanjundan Kumar, Yusuke Yamauchi
Controlled Synthesis Of Mesoporous Nitrogen-Doped Carbons With Highly Ordered Two-Dimensional Hexagonal Mesostructures And Their Chemical Activation, Abeer Enaiet Allah, Haibo Tan, Xingtao Xu, Ahmed Farghali, Mohamed Khedr, Abdulmohsen Alshehri, Yoshio Bando, Nanjundan Kumar, Yusuke Yamauchi
Australian Institute for Innovative Materials - Papers
Ordered mesoporous nitrogen-doped carbon (OMNC) materials are considered as the most promising material for supercapacitors. In this study, a highly ordered two-dimensional (2D) hexagonal mesostructured polymer was synthesized through a facile assembly of triblock polymer micelles and phenol-melamine/formaldehyde resin via an organic-organic assembly process in aqueous solution. After calcination, the novel OMNC materials with 2D hexagonal mesostructures were obtained. By further KOH activation, the surface area and the porosity of the OMNC significantly improved, and the internal mesoporous structures were maintained. The activated OMNC-800A displayed a specific capacitance as high as 475.75 F g-1at 0.5 A g-1with an outstanding cycling …
Defect Electrocatalytic Mechanism: Concept, Topological Structure And Perspective, Yi Jia, Jun Chen, Xiangdong Yao
Defect Electrocatalytic Mechanism: Concept, Topological Structure And Perspective, Yi Jia, Jun Chen, Xiangdong Yao
Australian Institute for Innovative Materials - Papers
Carbon-based materials have been attracting intense interest for electrocatalysis due to their various merits, such as abundance, low cost, high conductivity and tunable molecular structures. However, to date, the electrochemical activities of these electrocatalysts are mainly attributed to different active dopants (e.g. N, B, P or S), leading to a common concept that heteroatom doping is essential for carbon-based electrocatalysts. Recently, we presented a new concept where the specific topological defects could activate the oxygen reduction reaction (ORR) and developed a facile method to create such unique defects. Subsequent research has extended this new mechanism to other reactions, such as …
Thickness-Dependent Electronic Structure In Wte2 Thin Films, Feixiang Xiang, Ashwin Srinivasan, Z Du, Oleh Klochan, Shi Xue Dou, Alexander Hamilton, Xiaolin Wang
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 …
Cose2/Mose2heterostructures With Enriched Water Adsorption/Dissociation Sites Towards Enhanced Alkaline Hydrogen Evolution Reaction, Guoqiang Zhao, Peng Li, Kun Rui, Yaping Chen, Shi Xue Dou, Wenping Sun
Cose2/Mose2heterostructures With Enriched Water Adsorption/Dissociation Sites Towards Enhanced Alkaline Hydrogen Evolution Reaction, Guoqiang Zhao, Peng Li, Kun Rui, Yaping Chen, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
Transition-metal dichalcogenides (TMDs) are promising electrocatalysts toward the hydrogen evolution reaction (HER) in acid media, but they show significantly inferior activity in alkaline media due to the extremely sluggish water dissociation kinetics. Herein, CoSe2/MoSe2heterostructures with CoSe2quantum dots anchored on MoSe2nanosheets are synthesized towards enhanced alkaline HER catalytic activity. The incorporation of CoSe2is intended to construct additional water adsorption sites on the basal planes of MoSe2to promote water dissociation. The CoSe2/MoSe2heterostructures show substantially enhanced activity over MoSe2and CoSe2in 1 m KOH. The optimal overpotential required to reach a current density of 10 mA cm−2is merely 218 mV, which is more than …
Ion Selective Separators Based On Graphene Oxide For Stabilizing Lithium Organic Batteries, Yuede Pan, Junran Hao, Xuanbo Zhu, Yahong Zhou, Shulei Chou
Ion Selective Separators Based On Graphene Oxide For Stabilizing Lithium Organic Batteries, Yuede Pan, Junran Hao, Xuanbo Zhu, Yahong Zhou, Shulei Chou
Australian Institute for Innovative Materials - Papers
Ion selective membranes exist widely in the biological world and have been mimicked by scientists and engineers for the purpose of manipulating ion flow. For instance, polymers with sulfonate groups like Nafion are applied in proton exchange membrane fuel cells for facilitating proton transport whilst blocking other species. Herein, ion selective separators composed of graphene oxide (GO) and Super P (or graphene) are applied for stabilizing lithium organic batteries. The reconstructed GO sheets form numerous negatively charged nanochannels, which selectively allow the transport of lithium ions and reject the electroactive organic anions. Meanwhile, Super P (or graphene) on top of …
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
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 …
The Charge Transport Mechanisms In Conducting Polymer Polypyrrole Films And Fibers, Reza Ghanbari, Shaban Reza Ghorbani, Hadi Arabi, Javad Foroughi
The Charge Transport Mechanisms In Conducting Polymer Polypyrrole Films And Fibers, Reza Ghanbari, Shaban Reza Ghorbani, Hadi Arabi, Javad Foroughi
Australian Institute for Innovative Materials - Papers
Smart materials based on inherently conducting polymers are of practical interest and extend the advantages of electromaterials from the nanoscale to macroscale applications. However understanding mechanisms of the their electrical properties are still remained challanging. Herein, we report the transport properties of chemically and electrochemically preapred conducting polymer polypyrrole films and fibers. Conduction mechanisms of the as-prepared polypyrrole (PPy) were investigated using their electrical properties as a function of temperature (7-300 K). The results of the PPy resistivity were evaluated using a linear combination of Mott's and Efros-Shklovskii's Variable- Range Hopping (Mott-VRH and ES-VRH) models. It was found that the …
Enhancement Of Thermoelectric Figure Of Merit By The Insertion Of Multi-Walled Carbon Nanotubes In Α-Mgagsb, Jingdan Lei, De Zhang, Weibao Guan, Zheng Ma, Zhenxiang Cheng, Chao Wang, Yuanxu Wang
Enhancement Of Thermoelectric Figure Of Merit By The Insertion Of Multi-Walled Carbon Nanotubes In Α-Mgagsb, Jingdan Lei, De Zhang, Weibao Guan, Zheng Ma, Zhenxiang Cheng, Chao Wang, Yuanxu Wang
Australian Institute for Innovative Materials - Papers
Hybrid materials provide an efficient alternative route on improving the thermoelectric performance compared with doping elements. Especially, the insertion of carbon nanotubes plays an effective role in modulating the electrical transport properties and phonon scattering simultaneously. We fabricated a multi-walled carbon nanotube (MWCNTs) doped α-MgAgSb-based hybrid material and researched its thermoelectric properties in detail. The introduced MWCNTs enhanced carrier transport due to the metallic character of MWCNTs and phonon dispersion by the additional interfaces of insertions. The results showed that the electrical conductivity in α-MgAgSb/CNTs was remarkably enhanced especially at MgAg0.97Sb0.99/0.15 wt. % CNTs boosting to 1.6 times than that …
Progress And Future Perspectives On Li(Na)-Co2 Batteries, Fengshi Cai, Zhe Hu, Shulei Chou
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 …
Coordination Of Atomic Co-Pt Coupling Species At Carbon Defects As Active Sites For Oxygen Reduction Reaction, Longzhou Zhang, Julia Fischer, Yi Jia, Xuecheng Yan, Wei Xu, Xiyang Wang, Jun Chen, Dongjiang Yang, Hongwei Liu, Linzhou Zhuang, Marlies Hankel, Debra J. Searles, Keke Huang, Shouhua Feng, Christopher L. Brown, Xiangdong Yao
Coordination Of Atomic Co-Pt Coupling Species At Carbon Defects As Active Sites For Oxygen Reduction Reaction, Longzhou Zhang, Julia Fischer, Yi Jia, Xuecheng Yan, Wei Xu, Xiyang Wang, Jun Chen, Dongjiang Yang, Hongwei Liu, Linzhou Zhuang, Marlies Hankel, Debra J. Searles, Keke Huang, Shouhua Feng, Christopher L. Brown, Xiangdong Yao
Australian Institute for Innovative Materials - Papers
Platinum (Pt) is the state-of-the-art catalyst for oxygen reduction reaction (ORR), but its high cost and scarcity limit its large-scale use. However, if the usage of Pt reduces to a sufficiently low level, this critical barrier may be overcome. Atomically dispersed metal catalysts with high activity and high atom efficiency have the possibility to achieve this goal. Herein, we report a locally distributed atomic Pt-Co nitrogen-carbon-based catalyst (denoted as A-CoPt-NC) with high activity and robust durability for ORR (267 times higher than commercial Pt/C in mass activity). The A-CoPt-NC shows a high selectivity for the 4e-pathway in ORR, differing from …
Review Of Electrolytes In Nonaqueous Lithium-Oxygen Batteries, Haipeng Guo, Wenbin Luo, Jun Chen, Shulei Chou, Hua-Kun Liu, Jiazhao Wang
Review Of Electrolytes In Nonaqueous Lithium-Oxygen Batteries, Haipeng Guo, Wenbin Luo, Jun Chen, Shulei Chou, Hua-Kun Liu, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
Based on an inexhaustible and ubiquitous source of oxygen, the lithium-oxygen batteries are currently the subject of much scientific investigation because of their potential for extremely high energy density. The electrocatalytic materials for them have been extensively researched during the past decade. Even though they are a key component in the lithium-oxygen batteries, however, the study of electrolytes is still in its primary stage. Electrolytes have an important influence on the electrochemical performance of lithium-oxygen batteries, especially on their cycling stability and rate capacity. Therefore, it is important to select an ideal electrolyte with excellent stability against attack by reaction …
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
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.
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
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% …
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
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 …
Synthesis And Characterization Of Dendritic Pt Nanoparticles By Using Cationic Surfactant, Kenya Kani, Mohamed B. Zakaria, Jianjian Lin, Abdulmohsen Alshehri, Jeonghun Kim, Yoshio Bando, Jungmok You, Md. Shahriar Al Hossain, Jiang Bo, Yusuke Yamauchi
Synthesis And Characterization Of Dendritic Pt Nanoparticles By Using Cationic Surfactant, Kenya Kani, Mohamed B. Zakaria, Jianjian Lin, Abdulmohsen Alshehri, Jeonghun Kim, Yoshio Bando, Jungmok You, Md. Shahriar Al Hossain, Jiang Bo, Yusuke Yamauchi
Australian Institute for Innovative Materials - Papers
Platinum (Pt) is known as one of the most promising electrocatalysts, and nanostructured Pt materials have enhanced its activity due to their abundant catalytically active sites derived from their high surface area. Herein, we synthesize fascinating dendritic Pt nanoparticles (DPNs) by a softtemplating method using hexadecyltrimethylammonium chloride (CTAC) as a pore-forming agent. The dissolved negatively charged Pt precursor (PtCl4 2¹) effectively interact with the surfactant. The particle size of the obtained DPNs is around 20 nm, and the pore walls are composed of Pt nanocrystals. The obtained DPNs show good electrocatalytic activity towards methanol oxidation reaction (MOR) compared to commercial …
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
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 …
Biocompatible Bi(Oh)3nanoparticles With Reduced Photocatalytic Activityas Possible Ultraviolet Filter In Sunscreens, Kathrin Bogusz, Dean Cardillo, Moeava Tehei, Tifenn Boutard, Philip J. Barker, Thierry Devers, Anatoly B. Rosenfeld, Shi Xue Dou, Hua-Kun Liu, Konstantin K. Konstantinov
Biocompatible Bi(Oh)3nanoparticles With Reduced Photocatalytic Activityas Possible Ultraviolet Filter In Sunscreens, Kathrin Bogusz, Dean Cardillo, Moeava Tehei, Tifenn Boutard, Philip J. Barker, Thierry Devers, Anatoly B. Rosenfeld, Shi Xue Dou, Hua-Kun Liu, Konstantin K. Konstantinov
Australian Institute for Innovative Materials - Papers
In this study we investigate readily synthesised Bi(OH)3nanoparticles as a novel, multifunctional ultraviolet filter for sunscreen. The absorbance of Bi(OH)3NPs in the ultraviolet region is comparable to that of both ZnO and TiO2NPs used in commercial sunscreens. In vitro photoprotection results show that the combination of TiO2/Bi(OH)3is more efficient than TiO2/ZnO over the whole UV range, with an increase in sun protection factor of 28%. The emulsions show rheological properties comparable to those of commercial sunscreens. The combination of TiO2/Bi(OH)3led to insignificant damage on pre-painted steel panels after exterior exposure for twelve weeks. We also demonstrate that the addition of …
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
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 …
Unraveling The Effect Of Salt Chemistry On Long-Durability High-Phosphorus-Concentration Anode For Potassium Ion Batteries, Wenchao Zhang, Zhibin Wu, Jian Zhang, Guoping Liu, Nai-Hsuan Yang, Ru-Shi Liu, Wei Kong Pang, Wenwu Li, Zaiping Guo
Unraveling The Effect Of Salt Chemistry On Long-Durability High-Phosphorus-Concentration Anode For Potassium Ion Batteries, Wenchao Zhang, Zhibin Wu, Jian Zhang, Guoping Liu, Nai-Hsuan Yang, Ru-Shi Liu, Wei Kong Pang, Wenwu Li, Zaiping Guo
Australian Institute for Innovative Materials - Papers
Phosphorus-based anode materials are of considerable interest for grid-scale energy storage systems due to their high theoretical capacity. Nevertheless, the low electrical conductivity of P, large volume changes during cycling, and highly-reactive phosphide surface are hindering their potential applications. Herein, outstanding long-term cycling stability with high retained potassium storage capacity (213.7 mA h g−1over 2000 cycles) was achieved via the introduction of an alternative potassium bis(fluorosulfonyl)imide (KFSI) salt and by using a layered compound (GeP5) with a high phosphorus concentration as anode material. Fourier transform infrared spectroscopic mapping results suggest that KFSI salt helps to form an uniform solid electrolyte …
Graphitic Carbon Nanocage As A Stable And High Power Anode For Potassium-Ion Batteries, Bin Cao, Qing Zhang, Huan Liu, Bin Xu, Shilin Zhang, Tengfei Zhou, Jianfeng Mao, Wei Kong Pang, Zaiping Guo, Ang Li, Jisheng Zhou, Xiaohong Chen, Huaihe Song
Graphitic Carbon Nanocage As A Stable And High Power Anode For Potassium-Ion Batteries, Bin Cao, Qing Zhang, Huan Liu, Bin Xu, Shilin Zhang, Tengfei Zhou, Jianfeng Mao, Wei Kong Pang, Zaiping Guo, Ang Li, Jisheng Zhou, Xiaohong Chen, Huaihe Song
Australian Institute for Innovative Materials - Papers
As an emerging electrochemical energy storage device, potassium-ion batteries (PIBs) have drawn growing interest due to the resource-abundance and low cost of potassium. Graphite-based materials, as the most common anodes for commercial Li-ion batteries, have a very low capacity when used an anode for Na-ion batteries, but they show reasonable capacities as anodes for PIBs. The practical application of graphitic materials in PIBs suffers from poor cyclability, however, due to the large interlayer expansion/shrinkage caused by the intercalation/deintercalation of potassium ions. Here, a highly graphitic carbon nanocage (CNC) is reported as a PIBs anode, which exhibits excellent cyclability and superior …
Recent Progress On Sodium Ion Batteries: Potential High-Performance Anodes, Li Li, Yang Zheng, Shilin Zhang, Jianping Yang, Zongping Shao, Zaiping Guo
Recent Progress On Sodium Ion Batteries: Potential High-Performance Anodes, Li Li, Yang Zheng, Shilin Zhang, Jianping Yang, Zongping Shao, Zaiping Guo
Australian Institute for Innovative Materials - Papers
Due to massively growing demand arising from energy storage systems, sodium ion batteries (SIBs) have been recognized as the most attractive alternative to the current commercialized lithium ion batteries (LIBs) owing to the wide availability and accessibility of sodium. Unfortunately, the low energy density, inferior power density and poor cycle life are still the main issues for SIBs in the current drive to push the entire technology forward to meet the benchmark requirements for commercialization. Over the past few years, tremendous efforts have been devoted to improving the performance of SIBs, in terms of higher energy density and longer cycling …
Graphene-Oxide-Loaded Superparamagnetic Iron Oxide Nanoparticles For Ultrasensitive Electrocatalytic Detection Of Microrna, Md Nazmul Islam, Lena Gorgannezhad, Mostafa Kamal Masud, Shunsuke Tanaka, Md. Shahriar Al Hossain, Yusuke Yamauchi, Nam-Trung Nguyen, Muhammad J. A Shiddiky
Graphene-Oxide-Loaded Superparamagnetic Iron Oxide Nanoparticles For Ultrasensitive Electrocatalytic Detection Of Microrna, Md Nazmul Islam, Lena Gorgannezhad, Mostafa Kamal Masud, Shunsuke Tanaka, Md. Shahriar Al Hossain, Yusuke Yamauchi, Nam-Trung Nguyen, Muhammad J. A Shiddiky
Australian Institute for Innovative Materials - Papers
We report the electrocatalytic activity of a new class of superparamagnetic nanoparticles, graphene-oxide-loaded iron oxide (GO/IO hybrid material), towards the reduction of ruthenium hexaammine(III) chloride (Ru(NH3)6]3+, RuHex). Leveraging the electrocatalytic activity of the GO/IO hybrid material and the signal enhancement capacity of [Ru(NH3)6]3+/[Fe(CN)6]3 in an electrocatalytic cycle, an ultrasensitive and specific electrochemical sensor was developed for the detection of cancerrelated microRNA (miRNA). Using the direct affinity interaction between RNA and graphene oxide, magnetically isolated and purified target miRNA were directly adsorbed onto a screenprinted electrode modified with the GO/IO hybrid material. The detection was enabled by chronocoulometric (CC) readout of …
Thermally Responsive Torsional And Tensile Fiber Actuator Based On Graphene Oxide, Hyunsoo Kim, Ji Hwan Moon, Tae Jin Mun, Tae Gyu Park, Geoffrey M. Spinks, Gordon G. Wallace, Seon Jeong Kim
Thermally Responsive Torsional And Tensile Fiber Actuator Based On Graphene Oxide, Hyunsoo Kim, Ji Hwan Moon, Tae Jin Mun, Tae Gyu Park, Geoffrey M. Spinks, Gordon G. Wallace, Seon Jeong Kim
Australian Institute for Innovative Materials - Papers
Graphene-based actuators are of practical interest because of their relatively low cost compared with other nanocarbon materials, such as carbon nanotubes. We demonstrate the simple fabrication of graphene oxide (GO)-based fibers with an infiltrated nylon-6,6 polymer by wet spinning. These fibers could be twisted to form torsional actuators and further coiled to form tensile actuators. By controlling the relative twisting and coiling direction of the GO/nylon fiber, we were able to realize reversible contraction or elongation actuation with strokes as high as -80 and 75%, respectively, when the samples were heated to 200 °C. The tensile actuation showed a remarkably …
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
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 …
A 3d Conductive Scaffold With Lithiophilic Modification For Stable Lithium Metal Batteries, Rensheng Song, Bo Wang, Ying Xie, Tingting Ruan, Fei Wang, Ye Yuan, Dianlong Wang, Shi Xue Dou
A 3d Conductive Scaffold With Lithiophilic Modification For Stable Lithium Metal Batteries, Rensheng Song, Bo Wang, Ying Xie, Tingting Ruan, Fei Wang, Ye Yuan, Dianlong Wang, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
In this study, a non-lithiophilic nickel foam (NF) was transformed into a 3D lithiophilic N-doped graphene/nickel foam (NGNF) scaffold by a simple hydrothermal method. This scaffold can increase the area for Li deposition, improve the poor lithiophilicity of NF, and decrease the overpotential for Li deposition, leading to uniform Li plating/stripping. Thus, the average coulombic efficiency for Li deposition on the NGNF electrode can remain as high as 98.3% over 200 cycles and 98.0% over 100 cycles at current densities of 2 mA cm-2and 4 mA cm-2, respectively. Even when the Li deposition capacity is increased to as high as …
A Sequential Debonding Fracture Model For Hydrogen-Bonded Hydrogels, Hai Xin, Farshad Oveissi, Sina Naficy, Geoffrey M. Spinks
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 …
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
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 …
3d Printed Electrodes For Improved Gas Reactant Transport For Electrochemical Reactions, Tania Benedetti Goncales, Andrew Nattestad, Adam Taylor, Stephen T. Beirne, Gordon G. Wallace
3d Printed Electrodes For Improved Gas Reactant Transport For Electrochemical Reactions, Tania Benedetti Goncales, Andrew Nattestad, Adam Taylor, Stephen T. Beirne, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Additive manufacturing (AM) techniques open up a range of new possibilities for the design of electrochemical systems, affording us the ability to overcome limitations and difficulties that traditional production processes face. Here we present a novel electrode design, realized through selective laser melting of metal powders, with an integrated gas (reactant) delivery system. This architecture results in significantly (∼40%) enhanced hydrogen oxidation performance as compared with a control system. As such, this work serves as a proof-of-concept to highlight the wide array of designs that can be readily achieved due to recent developments in AM technologies.
Porous Zrc-Carbon Microspheres As Potential Insoluble Target Matrices For Production Of188W/188Re, Nicholas Scales, Jun Chen, Robert Aughterson, Inna Karatchevtseva, Attila Stopic, Gregory R. Lumpkin, Vittorio Luca
Porous Zrc-Carbon Microspheres As Potential Insoluble Target Matrices For Production Of188W/188Re, Nicholas Scales, Jun Chen, Robert Aughterson, Inna Karatchevtseva, Attila Stopic, Gregory R. Lumpkin, Vittorio Luca
Australian Institute for Innovative Materials - Papers
New microsphere sorbents are reported, which could find application in demanding radiation environments and especially as targets for the production of nuclear medicines by neutron irradiation. An easily-synthesized Zr anionic complex was introduced into quaternary amine-functionalised polystyrene-divinylbenzene-based anion-exchange resins by batch adsorption. Upon carbothermal reduction, the precursors were converted to porous carbon matrices containing particles of ZrC and ZrO2polymorphs. The most phase-pure material, ZrAX-1, possessed high surface area, multi-scale porosity and high mechanical strength. Adsorption of Re and W was investigated and its possible deployment as a reusable host for the production of188W/188Re is discussed.
Epitaxial Growth Of Ni(Oh)2 Nanoclusters On Mos2 Nanosheets For Enhanced Alkaline Hydrogen Evolution Reaction, Guoqiang Zhao, Yue Lin, Kun Rui, Qian Zhou, Yaping Chen, Shi Xue Dou, Wenping Sun
Epitaxial Growth Of Ni(Oh)2 Nanoclusters On Mos2 Nanosheets For Enhanced Alkaline Hydrogen Evolution Reaction, Guoqiang Zhao, Yue Lin, Kun Rui, Qian Zhou, Yaping Chen, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
Constructing heterostructures is an effective strategy for designing efficient electrocatalysts. MoS2 is a star catalyst for hydrogen evolution reaction (HER) in acidic media; however, the alkaline HER activity is deficient due to the sluggish water dissociation process. Herein, Ni(OH)2/MoS2 heterostructures with Ni(OH)2 nanoclusters epitaxially decorated on the surface of MoS2 are synthesized towards the alkaline HER. As compared with MoS2, the epitaxial Ni(OH)2/MoS2 heterostructures show significantly enhanced HER activity in 1 M KOH, and the overpotential is decreased by nearly 150 mV to reach a current density of 10 mA cm-2. The substantial increase in turnover frequency (TOF) demonstrates that …