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Articles 181 - 210 of 1690
Full-Text Articles in Engineering
Quantum Oscillations Of Robust Topological Surface States Up To 50 K In Thick Bulk-Insulating Topological Insulator, Weiyao Zhao, Lei Chen, Zengji Yue, Zhi Li, David L. Cortie, Michael S. Fuhrer, Xiaolin Wang
Quantum Oscillations Of Robust Topological Surface States Up To 50 K In Thick Bulk-Insulating Topological Insulator, Weiyao Zhao, Lei Chen, Zengji Yue, Zhi Li, David L. Cortie, Michael S. Fuhrer, Xiaolin Wang
Australian Institute for Innovative Materials - Papers
As personal electronic devices increasingly rely on cloud computing for energy-intensive calculations, the power consumption associated with the information revolution is rapidly becoming an important environmental issue. Several approaches have been proposed to construct electronic devices with low-energy consumption. Among these, the low-dissipation surface states of topological insulators (TIs) are widely employed. To develop TI-based devices, a key factor is the maximum temperature at which the Dirac surface states dominate the transport behavior. Here, we employ Shubnikov-de Haas oscillations (SdH) as a means to study the surface state survival temperature in a high-quality vanadium doped Bi1.08Sn0.02Sb0.9Te2S single crystal system. The …
Fabrication Of Hierarchically One-Dimensional Znxcd1-Xs/Nitio3 Nanostructures And Their Enhanced Photocatalytic Water Splitting Activity, Ling Wang, Guorui Yang, Silan Wang, Jianan Wang, Muhammad Salman Nasir, Caiyun Wang, Shengjie Peng, Wei Yan, Seeram Ramakrishna
Fabrication Of Hierarchically One-Dimensional Znxcd1-Xs/Nitio3 Nanostructures And Their Enhanced Photocatalytic Water Splitting Activity, Ling Wang, Guorui Yang, Silan Wang, Jianan Wang, Muhammad Salman Nasir, Caiyun Wang, Shengjie Peng, Wei Yan, Seeram Ramakrishna
Australian Institute for Innovative Materials - Papers
Hierarchically one-dimensional nanomaterials represent a kind of promising catalyst for photocatalytic of hydrogen generation, where the photoinduced charge carriers can effectively separate and be engaged in the target reaction. Herein, we report the synthesis of hierarchically one-dimensional ZnxCd1-xS/NiTiO3 nanofibers and the investigations of their photocatalytic performance. These well-designed nanofibers demonstrate a typically one-dimensional heterostructure with an excellent continuity, and the element mapping, X-ray diffraction, and X-ray photoelectron spectroscopy collectively confirm the ZnxCd1-xS nanoparticles being decorated on the surface of NiTiO3 nanofibers successfully. The ZnxCd1-xS/NiTiO3 nanofibers exhibit enhanced efficiency in photocatalytic hydrogen production under visible light, compared with the ZnxCd1-xS/TiO2 nanofibers. …
Heterostructure Engineering Of A Reverse Water Gas Shift Photocatalyst, Hong Wang, Jia Jia, Lu Wang, Keith Butler, Rui Song, Gilberto Casillas, Le He, Nazir Kherani, Doug Perovic, Liqiang Jing, Aron Walsh, Roland Dittmeyer, Geoffrey A. Ozin
Heterostructure Engineering Of A Reverse Water Gas Shift Photocatalyst, Hong Wang, Jia Jia, Lu Wang, Keith Butler, Rui Song, Gilberto Casillas, Le He, Nazir Kherani, Doug Perovic, Liqiang Jing, Aron Walsh, Roland Dittmeyer, Geoffrey A. Ozin
Australian Institute for Innovative Materials - Papers
To achieve substantial reductions in CO2 emissions, catalysts for the photoreduction of CO2 into value-added chemicals and fuels will most likely be at the heart of key renewable-energy technologies. Despite tremendous efforts, developing highly active and selective CO2 reduction photocatalysts remains a great challenge. Herein, a metal oxide heterostructure engineering strategy that enables the gas-phase, photocatalytic, heterogeneous hydrogenation of CO2 to CO with high performance metrics (i.e., the conversion rate of CO2 to CO reached as high as 1400 µmol g cat−1 h−1) is reported. The catalyst is comprised of indium oxide nanocrystals, In2O3−x(OH)y, nucleated and grown on the surface …
Atomic-Local Environments Of Single-Atom Catalysts: Synthesis, Electronic Structure, And Activity, Weihong Lai, Zongcheng Miao, Yunxiao Wang, Jiazhao Wang, Shulei Chou
Atomic-Local Environments Of Single-Atom Catalysts: Synthesis, Electronic Structure, And Activity, Weihong Lai, Zongcheng Miao, Yunxiao Wang, Jiazhao Wang, Shulei Chou
Australian Institute for Innovative Materials - Papers
Single-atom catalysts (SACs) hold great promise for maximizing atomic efficiency of supported metals via the ultimate utilization of every single atom. The foreign isolated substitutions anchored on different supports build varieties of local structural centers, changing the physical and chemical properties. Thus, distinct atomic local environments for single-atom catalysts are essential for determining superior catalytic performance for a wide variety of chemical reactions. The examples of synthesizing single atoms on various supports presented here deepen the understanding of the different structural and electronic properties of SACs, in which the metal single atom does not bind with any other atoms of …
Effects Of Ca Substitution On Quasiacoustic Sliding Modes In Sr14-X Cax Cu24 O41, E Constable, Andrew Squires, Josip Horvat, R A. Lewis, Dominique Rt Appadoo, R Plathe, Partha Sarathi Roy, J Brubach, S Debrion, A Pimenov, Guanyu Deng
Effects Of Ca Substitution On Quasiacoustic Sliding Modes In Sr14-X Cax Cu24 O41, E Constable, Andrew Squires, Josip Horvat, R A. Lewis, Dominique Rt Appadoo, R Plathe, Partha Sarathi Roy, J Brubach, S Debrion, A Pimenov, Guanyu Deng
Australian Institute for Innovative Materials - Papers
The low-energy lattice dynamics of the quasiperiodic spin-ladder cuprate Sr14-xCaxCu24O41 are investigated using terahertz frequency synchrotron radiation. A high density of low-lying optical excitations is present in the 1-3 THz energy range, while at least two highly absorbing excitations stemming from long-wavelength acoustic oscillations of the incommensurate chain and ladder sublattices, are observed at subterahertz frequencies. The effects of Ca substitution on the subterahertz quasiacoustic sliding mode gaps is investigated using coherent synchrotron radiation. Analysis of the results suggest increasing substitution of Sr for Ca is accompanied by a transfer of spectral weight between sliding modes associated with different chain-ladder …
Structure And Electrochemical Performance Modulation Of A Lini0.8co0.1mn0.1o2 Cathode Material By Anion And Cation Co-Doping For Lithium Ion Batteries, Rong Li, Yong Ming, Wei Xiang, Chunliu Xu, Guilin Feng, Yongchun Li, Yanxiao Chen, Zhenguo Wu, Ben-He Zhong, Xiaodong Guo
Structure And Electrochemical Performance Modulation Of A Lini0.8co0.1mn0.1o2 Cathode Material By Anion And Cation Co-Doping For Lithium Ion Batteries, Rong Li, Yong Ming, Wei Xiang, Chunliu Xu, Guilin Feng, Yongchun Li, Yanxiao Chen, Zhenguo Wu, Ben-He Zhong, Xiaodong Guo
Australian Institute for Innovative Materials - Papers
Ni-rich layered transition metal oxides show great energy density but suffer poor thermal stability and inferior cycling performance, which limit their practical application. In this work, a minor content of Co and B were co-doped into the crystal of a Ni-rich cathode (LiNi0.8Co0.1Mn0.1O2) using cobalt acetate and boric acid as dopants. The results analyzed by XRD, TEM, XPS and SEM reveal that the modified sample shows a reduced energy barrier for Li+ insertion/extraction and alleviated Li+/Ni2+ cation mixing. With the doping of B and Co, corresponding enhanced cycle stability was achieved with a high capacity retention of 86.1% at 1.0C …
Self-Healing Electrode With High Electrical Conductivity And Mechanical Strength For Artificial Electronic Skin, Hyeon Jun Sim, Hyunsoo Kim, Yongwoo Jang, Geoffrey M. Spinks, Sanjeev Gambhir, David L. Officer, Gordon G. Wallace, Seon Jeong Kim
Self-Healing Electrode With High Electrical Conductivity And Mechanical Strength For Artificial Electronic Skin, Hyeon Jun Sim, Hyunsoo Kim, Yongwoo Jang, Geoffrey M. Spinks, Sanjeev Gambhir, David L. Officer, Gordon G. Wallace, Seon Jeong Kim
Australian Institute for Innovative Materials - Papers
A self-healing electrode is an electrical conductor that can repair internal damage by itself, similar to human skin. Since self-healing electrodes are based on polymers and hydrogels, these components are still limited by low electrical conductivity and mechanical strength. In this study, we designed an electrically conductive, mechanically strong, and printable self-healing electrode using liquid crystal graphene oxide (LCGO) and silver nanowires (AgNWs). The conductive ink was easily prepared by simply mixing LCGO and AgNWs solutions. The ultrathin (3 μm thick) electrode can be printed in various shapes, such as a butterfly, in a freestanding state. The maximum conductivity and …
Li2s-Based Li-Ion Sulfur Batteries: Progress And Prospects, Jicheng Jiang, Qining Fan, Shulei Chou, Zaiping Guo, Konstantin K. Konstantinov, Hua-Kun Liu, Jiazhao Wang
Li2s-Based Li-Ion Sulfur Batteries: Progress And Prospects, Jicheng Jiang, Qining Fan, Shulei Chou, Zaiping Guo, Konstantin K. Konstantinov, Hua-Kun Liu, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
The great demand for high-energy-density batteries has driven intensive research on the Li–S battery due to its high theoretical energy density. Consequently, considerable progress in Li–S batteries is achieved, although the lithium anode material is still challenging in terms of lithium dendrites and its unstable interface with electrolyte, impeding the practical application of the Li–S battery. Li2S-based Li-ion sulfur batteries (LISBs), which employ lithium-metal-free anodes, are a convenient and effective way to avoid the use of lithium metal for the realization of practical Li–S batteries. Over the past decade, studies on LISBs are carried out to optimize their performance. Herein, …
Carbon Nanotube Yarn For Fiber-Shaped Electrical Sensors, Actuators, And Energy Storage For Smart Systems, Yongwoo Jang, Sung Min Kim, Geoffrey M. Spinks, Seon Jeong Kim
Carbon Nanotube Yarn For Fiber-Shaped Electrical Sensors, Actuators, And Energy Storage For Smart Systems, Yongwoo Jang, Sung Min Kim, Geoffrey M. Spinks, Seon Jeong Kim
Australian Institute for Innovative Materials - Papers
Smart systems are those that display autonomous or collaborative functionalities, and include the ability to sense multiple inputs, to respond with appropriate operations, and to control a given situation. In certain circumstances, it is also of great interest to retain flexible, stretchable, portable, wearable, and/or implantable attributes in smart electronic systems. Among the promising candidate smart materials, carbon nanotubes (CNTs) exhibit excellent electrical and mechanical properties, and structurally fabricated CNT-based fibers and yarns with coil and twist further introduce flexible and stretchable properties. A number of notable studies have demonstrated various functions of CNT yarns, including sensors, actuators, and energy …
Critical Advances In Ambient Air Operation Of Nonaqueous Rechargeable Li-Air Batteries, Lili Liu, Haipeng Guo, Lijun Fu, Shulei Chou, Simon Thiele, Yu-Ping Wu, Jiazhao Wang
Critical Advances In Ambient Air Operation Of Nonaqueous Rechargeable Li-Air Batteries, Lili Liu, Haipeng Guo, Lijun Fu, Shulei Chou, Simon Thiele, Yu-Ping Wu, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
Over the past few years, great attention has been given to nonaqueous lithium–air batteries owing to their ultrahigh theoretical energy density when compared with other energy storage systems. Most of the research interest, however, is dedicated to batteries operating in pure or dry oxygen atmospheres, while Li–air batteries that operate in ambient air still face big challenges. The biggest challenges are H2O and CO2 that exist in ambient air, which can not only form byproducts with discharge products (Li2O2), but also react with the electrolyte and the Li anode. To this end, recent progress in understanding the chemical and electrochemical …
Metallic State Two-Dimensional Holey-Structured Co3fen Nanosheets As Stable And Bifunctional Electrocatalysts For Zinc–Air Batteries, Haipeng Guo, Xuanwen Gao, Nengfei Yu, Zhi Zheng, Wenbin Luo, Chang Wu, Hua-Kun Liu, Jiazhao Wang
Metallic State Two-Dimensional Holey-Structured Co3fen Nanosheets As Stable And Bifunctional Electrocatalysts For Zinc–Air Batteries, Haipeng Guo, Xuanwen Gao, Nengfei Yu, Zhi Zheng, Wenbin Luo, Chang Wu, Hua-Kun Liu, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
Exploring economically efficient electrocatalysts with robust bifunctional oxygen conversion catalytic activity and designing appropriate structures are essential to realize ideal zinc-Air batteries with high energy density and long lifespan. Two-dimensional metallic state Co3FeN nanosheets with a holey-structured architecture are designed and shown to exhibit enhanced catalytic properties owing to the complete exposure of the atoms in the large lateral surfaces and in the edges of pore areas, together with the lowest OH∗ adsorption energy on exposed surfaces due to bimetallic synergistic effects. Meanwhile, this porous architecture can not only accelerate electron transportation by its metallic state highly oriented crystallized structure, …
Stress Distortion Restraint To Boost The Sodium Ion Storage Performance Of A Novel Binary Hexacyanoferrate, Weijie Li, Chao Han, Wanlin Wang, Qingbing Xia, Shulei Chou, Qinfen Gu, Bernt Johannessen, Hua-Kun Liu, Shi Xue Dou
Stress Distortion Restraint To Boost The Sodium Ion Storage Performance Of A Novel Binary Hexacyanoferrate, Weijie Li, Chao Han, Wanlin Wang, Qingbing Xia, Shulei Chou, Qinfen Gu, Bernt Johannessen, Hua-Kun Liu, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Mn-based hexacyanoferrate NaxMnFe(CN)6 (NMHFC) has been attracting more attention as a promising cathode material for sodium ion storage owing to its low cost, environmental friendliness, and its high voltage plateau of 3.6 V, which comes from the Mn2+/Mn3+ redox couple. In particular, the Na-rich NMHFC (x > 1.40) with trigonal phase is considered an attractive candidate due to its large capacity of ≈130 mAh g−1, delivering high energy density. Its unstable cycle life, however, is holding back its practical application due to the dissolution of Mn2+ and the trigonal-cubic phase transition during …
Superparamagnetic Nanoarchitectures For Disease-Specific Biomarker Detection, Mostafa Masud, Jongbeom Na, Muhammad Younus, Md Hossain, Yoshio Bando, Muhammad Shiddiky, Yusuke Yamauchi
Superparamagnetic Nanoarchitectures For Disease-Specific Biomarker Detection, Mostafa Masud, Jongbeom Na, Muhammad Younus, Md Hossain, Yoshio Bando, Muhammad Shiddiky, Yusuke Yamauchi
Australian Institute for Innovative Materials - Papers
© 2019 The Royal Society of Chemistry. The detection of clinically relevant disease-specific biomolecules, including nucleic acids, circulating tumor cells, proteins, antibodies, and extracellular vesicles, has been indispensable to understand their functions in disease diagnosis and prognosis. Therefore, a biosensor for the robust, ultrasensitive, and selective detection of these low-Abundant biomolecules in body fluids (blood, urine, and saliva) is emerging in current clinical research. In recent years, nanomaterials, especially superparamagnetic nanomaterials, have played essential roles in biosensing due to their intrinsic magnetic, electrochemical, and optical properties. However, engineered multicomponent magnetic nanoparticle-based current biosensors that offer the advantages of excellent stability …
Selenium@Hollow Mesoporous Carbon Composites For High-Rate And Long-Cycling Lithium/Sodium-Ion Batteries, Pan Xue, Yanjun Zhai, Nana Wang, Yaohui Zhang, Zhenxiao Lu, Yuanlin Liu, Zhongchao Bai, Baokun Han, Guifu Zou, Shi Xue Dou
Selenium@Hollow Mesoporous Carbon Composites For High-Rate And Long-Cycling Lithium/Sodium-Ion Batteries, Pan Xue, Yanjun Zhai, Nana Wang, Yaohui Zhang, Zhenxiao Lu, Yuanlin Liu, Zhongchao Bai, Baokun Han, Guifu Zou, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
© 2019 Elsevier B.V. Selenium (Se) is a prospective candidate of electrode material for high-energy batteries. However, the low Se loading, volumetric expansion and polyselenide shuttling between cathode and anode are major factors to limit further development. To overcome above issues, the hollow carbon structure with interconnected mesopores is used to confine Se composite via a facile annealing treatment route. The Se/HMCS electrode exhibits excellent performance, including a long cycle life (710 mA h g−1 at the 800th cycle at 0.5 A g−1 for LIBs and 291 mA h g−1 at the 1500th cycle at 0.5 A g−1 for SIBs). …
Large-Scale Synthesis Of Mof-Derived Superporous Carbon Aerogels With Extraordinary Adsorption Capacity For Organic Solvents, Chaohai Wang, Jeonghun Kim, Jing Tang, Jongbeom Na, Yong Kang, Minjun Kim, Hyunsoo Lim, Yoshio Bando, Jiansheng Li, Yusuke Yamauchi
Large-Scale Synthesis Of Mof-Derived Superporous Carbon Aerogels With Extraordinary Adsorption Capacity For Organic Solvents, Chaohai Wang, Jeonghun Kim, Jing Tang, Jongbeom Na, Yong Kang, Minjun Kim, Hyunsoo Lim, Yoshio Bando, Jiansheng Li, Yusuke Yamauchi
Australian Institute for Innovative Materials - Papers
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Carbon aerogels (CAs) with 3D interconnected networks hold promise for application in areas such as pollutant treatment, energy storage, and electrocatalysis. In spite of this, it remains challenging to synthesize high-performance CAs on a large scale in a simple and sustainable manner. We report an eco-friendly method for the scalable synthesis of ultralight and superporous CAs by using cheap and widely available agarose (AG) biomass as the carbon precursor. Zeolitic imidazolate framework-8 (ZIF-8) with high porosity is introduced into the AG aerogels to increase the specific surface area and enable heteroatom …
Designed Conducting Polymer Composites That Facilitate Long-Lived, Light-Driven Oxygen And Hydrogen Evolution From Water In A Photoelectrochemical Concentration Cell (Pecc), Mohammed Alsultan, Khalid Zainulabdeen, Pawel W. Wagner, Gerhard F. Swiegers, Holly Warren
Designed Conducting Polymer Composites That Facilitate Long-Lived, Light-Driven Oxygen And Hydrogen Evolution From Water In A Photoelectrochemical Concentration Cell (Pecc), Mohammed Alsultan, Khalid Zainulabdeen, Pawel W. Wagner, Gerhard F. Swiegers, Holly Warren
Australian Institute for Innovative Materials - Papers
Light-driven water-splitting to generate hydrogen and oxygen from water is typically carried out in an electrochemical cell with an external voltage greater than 1.23 V applied between the electrodes. In this work, we examined the use of a concentration/chemical bias as a means of facilitating water-splitting under light illumination without the need for such an externally applied voltage. Such a concentration bias was created by employing a pH differential in the liquid electrolytes within the O2-generating anode half-cell and the H2-generating cathode half-cell. A novel, stretchable, highly ion-conductive polyacrylamide CsCl hydrogel was developed to connect the two half-cells. The key …
3d Graphene-Containing Structures For Tissue Engineering, Jianfeng Li, Xiao Liu, Jeremy Micah Crook, Gordon G. Wallace
3d Graphene-Containing Structures For Tissue Engineering, Jianfeng Li, Xiao Liu, Jeremy Micah Crook, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
© 2019 Elsevier Ltd Graphene and its derivatives have been extensively explored in various fields and have shown great promise toward energy harvesting, environmental protection, and health care. 3D graphene-containing structures (3DGCSs) are especially endowed with useable features relating to physicochemical properties within the hierarchical architectures. Thus, 3DGCSs are increasingly being applied for tissue engineering because of their supportability of human cells and functionalization potential. This review focuses on recent progress in tissue engineering utilizing 3DGCSs, providing insights into fabrication, application, and constraints in bionic research.
Exfoliation Of Amorphous Phthalocyanine Conjugated Polymers Into Ultrathin Nanosheets For Highly Efficient Oxygen Reduction, Wenping Liu, Chiming Wang, Lijie Zhang, Houhe Pan, Wenbo Liu, Jun Chen, Dongjiang Yang, Yanjuan Xiang, Kang Wang, Jianzhuang Jiang, Xiangdong Yao
Exfoliation Of Amorphous Phthalocyanine Conjugated Polymers Into Ultrathin Nanosheets For Highly Efficient Oxygen Reduction, Wenping Liu, Chiming Wang, Lijie Zhang, Houhe Pan, Wenbo Liu, Jun Chen, Dongjiang Yang, Yanjuan Xiang, Kang Wang, Jianzhuang Jiang, Xiangdong Yao
Australian Institute for Innovative Materials - Papers
It is a significant challenge to develop a high-efficiency synthetic methodology to access fully conjugated 2D conjugated polymer (CP)/covalent organic framework (COF) nanosheets (NSs) that have great application potential for electronics and energy. Herein, we report the exfoliation of a series of amorphous ethynyl-linked phthalocyanine (Pc) CPs (MPc-CPs, M = Fe, Co, Fe0.5Co0.5) into ultrathin MPc-CP NSs. Random coupling between the four regioisomers (with D4h, D2h, C2v and Cs symmetry) of the two tetra-β-substituted phthalocyanine precursors endows the resulting phthalocyanine conjugated polymers MPc-CPs with intrinsic structural defects and a disordered framework on individual layers. This in turn induces a diminished …
Ionic And Electronic Properties Of The Topological Insulator Bi2te2se Investigated Via Β-Detected Nuclear Magnetic Relaxation And Resonance Of 8li, Ryan M. L. Mcfadden, Aris Chatzichristos, Kim H. Chow, David L. Cortie, Martin H. Dehn, Derek Fujimoto, Masrur D. Hossain, Huiwen Ji, Victoria L. Karner, Robert F. Kiefl, C. D. Philip Levy, Ruohong Li, Iain Mckenzie, Gerald D. Morris, Oren Ofer, Matthew R. Pearson, Monika Stachura, Robert J. Cava, W Andrew Macfarlane
Ionic And Electronic Properties Of The Topological Insulator Bi2te2se Investigated Via Β-Detected Nuclear Magnetic Relaxation And Resonance Of 8li, Ryan M. L. Mcfadden, Aris Chatzichristos, Kim H. Chow, David L. Cortie, Martin H. Dehn, Derek Fujimoto, Masrur D. Hossain, Huiwen Ji, Victoria L. Karner, Robert F. Kiefl, C. D. Philip Levy, Ruohong Li, Iain Mckenzie, Gerald D. Morris, Oren Ofer, Matthew R. Pearson, Monika Stachura, Robert J. Cava, W Andrew Macfarlane
Australian Institute for Innovative Materials - Papers
We report measurements on the high-temperature ionic and low-temperature electronic properties of the three-dimensional topological insulator Bi2Te2Se using ion-implanted 8Liβ-detected nuclear magnetic relaxation and resonance. With implantation energies in the range 5–28keV, the probes penetrate beyond the expected range of the topological surface state, but are still within 250nm of the surface. At temperatures above ∼150K, spin-lattice relaxation measurements reveal isolated 8Li+ diffusion with an activation energy EA=0.185(8)eV and attempt frequency τ−10=8±3×1011s−1 for atomic site-to-site hopping. At lower temperature, we find a linear Korringa-type relaxation mechanism with a field-dependent slope and intercept, which is accompanied by an anomalous field dependence …
Electrochemical Potassium/Lithium-Ion Intercalation Into Tise2: Kinetics And Mechanism, Peng Li, Xiaobo Zheng, Haoxiang Yu, Guoqiang Zhao, Jie Shu, Xun Xu, Wenping Sun, Shi Xue Dou
Electrochemical Potassium/Lithium-Ion Intercalation Into Tise2: Kinetics And Mechanism, Peng Li, Xiaobo Zheng, Haoxiang Yu, Guoqiang Zhao, Jie Shu, Xun Xu, Wenping Sun, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
As one promising candidate for next-generation energy storage systems, K-ion batteries (KIBs) attract increasing research attention due to the element abundance, low cost, and competent energy density as compared to Li-ion batteries. However, developing practical electrode materials in particular cathodes for KIBs is still in its infancy, and the related reaction mechanisms of the electrode materials are far from completely understood. In this work, TiSe2was, for the first time, investigated as an intercalated-type electrode for potassium storage due to its large interlayer space. The potassiation/depotassiation reaction mechanism was unraveled based on the analysis of in-situ X-ray diffraction (XRD), ex-situ X-ray …
New Monatomic Layer Clusters For Advanced Catalysis Materials, Binwei Zhang, Long Ren, Yunxiao Wang, Yi Du, Lei Jiang, Shi Xue Dou
New Monatomic Layer Clusters For Advanced Catalysis Materials, Binwei Zhang, Long Ren, Yunxiao Wang, Yi Du, Lei Jiang, Shi Xue Dou
Australian Institute for Innovative Materials - Papers
Noble metals have been widely applied as catalysts in chemical production, energy conversion, and emission control [1-3], but their high cost and scarcity are major obstacles for any large-scale practical applications. It is therefore of great interest to explore new active material systems that require less mass loading of noble metal catalysts but with even better performance. Recently, intense research has been devoted towards downsizing the noble metals into single-atom catalysts (SACs) [4,5]. SACs, with single-atom active centers, were first reported by Qiao et al. [4]. They synthesized a single Pt atom catalyst supported on FeOx (Pt1/FeOx), which offered extremely …
Cubic Aggregates Of Zn2sno4 Nanoparticles And Their Application In Dye-Sensitized Solar Cells, Kadhim Al-Attafi, Fanar Hussein Jawdat, Hamzeh Qutaish, Patricia Y. Hayes, Amar Al-Keisy, Kyubin Shim, Yusuke Yamauchi, Shi Xue Dou, Andrew Nattestad, Jung Ho Kim
Cubic Aggregates Of Zn2sno4 Nanoparticles And Their Application In Dye-Sensitized Solar Cells, Kadhim Al-Attafi, Fanar Hussein Jawdat, Hamzeh Qutaish, Patricia Y. Hayes, Amar Al-Keisy, Kyubin Shim, Yusuke Yamauchi, Shi Xue Dou, Andrew Nattestad, Jung Ho Kim
Australian Institute for Innovative Materials - Papers
Zinc Tin Oxide (Zn2SnO4 or ZTO) has emerged as an alternate photoanode material for dye-sensitized solar cells (DSCs), as it offers some advantages as compared to Titania (TiO2). In this work, crystalline ZTO nanoparticles, formed into cubic aggregate structures were synthesised by a solvothermal reaction and employed in photoanodes of DSCs, using either a high extinction coefficient organic (D149) or an organometallic (N719) dye. These were investigated in comparison with devices based on TiO2 photoanodes, with DSCs based on ZTO|D149 showing a promising solar-to-electric conversion efficiency of 4.9%, close to that of TiO2|D149. In addition, experiments were performed using ZTO …
Iron-Doped Nickel Molybdate With Enhanced Oxygen Evolution Kinetics, Jiayi Chen, Guoqiang Zhao, Yaping Chen, Kun Rui, Hui Mao, Shi Xue Dou, Wenping Sun
Iron-Doped Nickel Molybdate With Enhanced Oxygen Evolution Kinetics, Jiayi Chen, Guoqiang Zhao, Yaping Chen, Kun Rui, Hui Mao, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
Electrochemical water splitting is one of the potential approaches for making renewable energy production and storage viable. The oxygen evolution reaction (OER), as a sluggish four-electron electrochemical reaction, has to overcome high overpotential to accomplish overall water splitting. Therefore, developing low-cost and highly active OER catalysts is the key for achieving efficient and economical water electrolysis. In this work, Fe-doped NiMoO4 was synthesized and evaluated as the OER catalyst in alkaline medium. Fe3+ doping helps to regulate the electronic structure of Ni centers in NiMoO4, which consequently promotes the catalytic activity of NiMoO4. The overpotential to reach a current density …
Heteroatom-Doped Mose2 Nanosheets With Enhanced Hydrogen Evolution Kinetics For Alkaline Water Splitting, Guoqiang Zhao, Xingyong Wang, Shaolan Wang, Kun Rui, Yaping Chen, Haibo Yu, Jing Ma, Shi Xue Dou, Wenping Sun
Heteroatom-Doped Mose2 Nanosheets With Enhanced Hydrogen Evolution Kinetics For Alkaline Water Splitting, Guoqiang Zhao, Xingyong Wang, Shaolan Wang, Kun Rui, Yaping Chen, Haibo Yu, Jing Ma, Shi Xue Dou, Wenping Sun
Australian Institute for Innovative Materials - Papers
Electrochemical water splitting for hydrogen generation is a vital part for the prospect of future energy systems, however, the practical utilization relies on the development of highly active and earth-abundant catalysts to boost the energy conversion efficiency as well as reduce the cost. Molybdenum diselenide (MoSe2) is a promising nonprecious metal-based electrocatalyst for hydrogen evolution reaction (HER) in acidic media, but it exhibits inferior alkaline HER kinetics in great part due to the sluggish water adsorption/dissociation process. Herein, the alkaline HER kinetics of MoSe2 is substantially accelerated by heteroatom doping with transition metal ions. Specifically, the Ni-doped MoSe2 nanosheets exhibit …
Manganese Based Layered Oxides With Modulated Electronic And Thermodynamic Properties For Sodium Ion Batteries, Kai Zhang, Duho Kim, Zhe Hu, Mihui Park, Gahee Noh, Yujeong Yang, Jing Zhang, Vincent Lau, Shulei Chou, Maenghyo Cho, Si-Young Choi, Yong-Mook Kang
Manganese Based Layered Oxides With Modulated Electronic And Thermodynamic Properties For Sodium Ion Batteries, Kai Zhang, Duho Kim, Zhe Hu, Mihui Park, Gahee Noh, Yujeong Yang, Jing Zhang, Vincent Lau, Shulei Chou, Maenghyo Cho, Si-Young Choi, Yong-Mook Kang
Australian Institute for Innovative Materials - Papers
Manganese based layered oxides have received increasing attention as cathode materials for sodium ion batteries due to their high theoretical capacities and good sodium ion conductivities. However, the Jahn–Teller distortion arising from the manganese (III) centers destabilizes the host structure and deteriorates the cycling life. Herein, we report that zinc-doped Na0.833[Li0.25Mn0.75]O2 can not only suppress the Jahn–Teller effect but also reduce the inherent phase separations. The reduction of manganese (III) amount in the zinc-doped sample, as predicted by first-principles calculations, has been confirmed by its high binding energies and the reduced octahedral structural …
Hydrogen-Containing Na3hti1- Xmnxf8 Narrow-Band Phosphor For Light-Emitting Diodes, Muhuai Fang, Tsun Yang, Tadeusz Lesniewski, Chi Lee, Sebastian Mahlik, Marek Grinberg, Vanessa K. Peterson, Christophe R. Didier, Wei Kong Pang, Chaochin Su, Ru-Shi Liu
Hydrogen-Containing Na3hti1- Xmnxf8 Narrow-Band Phosphor For Light-Emitting Diodes, Muhuai Fang, Tsun Yang, Tadeusz Lesniewski, Chi Lee, Sebastian Mahlik, Marek Grinberg, Vanessa K. Peterson, Christophe R. Didier, Wei Kong Pang, Chaochin Su, Ru-Shi Liu
Australian Institute for Innovative Materials - Papers
We synthesize the phosphor Na3HTi1-xMnxF8 (Na3HTiF8:Mn4+) material series using a coprecipitation method. We determine the complete phase and crystallographic structure of the Na3HTiF8 series end-member, including the determination of the H atoms at the 4b (0, 1/2, 0) crystallographic site within the Cmcm space group symmetry structure, resulting in a quantum efficiency of ∼44%, which is comparative to the Na2SiF6:Mn4+ phosphor materials. We successfully model the luminescent properties of the Na3HTi1-xMnxF8 material …
Tunable Solution-Processable Anodic Exfoliated Graphene, Chong Yong Lee, David R. G Mitchell, Paul J. Molino, Adam Fahy, Gordon G. Wallace
Tunable Solution-Processable Anodic Exfoliated Graphene, Chong Yong Lee, David R. G Mitchell, Paul J. Molino, Adam Fahy, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Electrochemical exfoliation of graphite is an emerging approach to provide large scale, low cost, efficient and reliable production of high quality, low defect and solution-processable graphene. The use of a sulphuric acid electrolyte allows rapid and efficient anodic graphite exfoliation. However, the highly oxidative process in this electrolyte promotes hydroxyl radicals. These degrade the carbon lattice structurally, hence compromising the quality of graphene produced. Here, we report a simple and effective way to overcome this challenge; the use of an additive to scavenge hydroxyl radicals. The addition of a small volume percentage of ethylene glycol acts to scavenge hydroxyl radicals. …
Electrochemical Co2 Reduction Over Nitrogen-Doped Sno2 Crystal Surfaces, Yuefeng Zhang, Jianjun Liu, Zengxi Wei, Quanhui Liu, Caiyun Wang, Jianmin Ma
Electrochemical Co2 Reduction Over Nitrogen-Doped Sno2 Crystal Surfaces, Yuefeng Zhang, Jianjun Liu, Zengxi Wei, Quanhui Liu, Caiyun Wang, Jianmin Ma
Australian Institute for Innovative Materials - Papers
Crystal planes of a catalyst play crucial role in determining the electrocatalytic performance for CO2reduction. The catalyst SnO2can convert CO2molecules into valuable formic acid (HCOOH). Incorporating heteroatom N into SnO2further improves its catalytic activity. To understand the mechanism and realize a highly efficient CO2-to-HCOOH conversion, we used density functional theory (DFT) to calculate the free energy of CO2reduction reactions (CO2RR) on different crystal planes of N-doped SnO2(N-SnO2). The results indicate that N-SnO2lowered the activation energy of intermediates leading to a better catalytic performance than pure SnO2. We also discovered that the N-SnO2(211) plane possesses the most suitable free energy during …
Recent Advances In 3d Graphene Architectures And Their Composites For Energy Storage Applications, Zhijie Wang, Hong Gao, Qing Zhang, Yuqing Liu, Jun Chen, Zaiping Guo
Recent Advances In 3d Graphene Architectures And Their Composites For Energy Storage Applications, Zhijie Wang, Hong Gao, Qing Zhang, Yuqing Liu, Jun Chen, Zaiping Guo
Australian Institute for Innovative Materials - Papers
Graphene is widely applied as an electrode material in energy storage fields. However, the strong π-π interaction between graphene layers and the stacking issues lead to a great loss of electrochemically active surface area, damaging the performance of graphene electrodes. Developing 3D graphene architectures that are constructed of graphene sheet subunits is an effective strategy to solve this problem. The graphene architectures can be directly utilized as binder-free electrodes for energy storage devices. Furthermore, they can be used as a matrix to support active materials and further improve their electrochemical performance. Here, recent advances in synthesizing 3D graphene architectures and …
A Simple Technique For Development Of Fibres With Programmable Microsphere Concentration Gradients For Local Protein Delivery, Fahimeh Mehrpouya, Zhilian Yue, Anthony C. Romeo, Robert A. Gorkin Iii, Robert M. I Kapsa, Simon E. Moulton, Gordon G. Wallace
A Simple Technique For Development Of Fibres With Programmable Microsphere Concentration Gradients For Local Protein Delivery, Fahimeh Mehrpouya, Zhilian Yue, Anthony C. Romeo, Robert A. Gorkin Iii, Robert M. I Kapsa, Simon E. Moulton, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Alginate has been a biologically viable option for controlled local delivery of bioactive molecules in vitro and in vivo. Specific bioactive molecule release profiles are achieved often by controlling polymer composition/concentration, which also determines the modulus of hydrogels. This largely limits alginate-mediated bioactive molecule delivery to single-factors of uniform concentration applications, rather than applications that may require (multiple) bioactive molecules delivered at a concentration gradient for chemotactic purposes. Here we report a two-phase PLGA/alginate delivery system composed of protein-laden poly-d,l-lactic-co-glycolic acid (PLGA) microspheres wet-spun into alginate fibres. Fluorescein isothiocyanate-conjugated bovine serum albumin (FITC-BSA) was used as a model protein and …