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Articles 1 - 9 of 9
Full-Text Articles in Physical Sciences and Mathematics
Α-Fe2o3/Graphene Nanocomposite As Anode Material For Sodium-Ion Batteries With Enhanced Capacity Retention, Zhijia Zhang, Yunxiao Wang, Shulei Chou, Huijun Li, Hua-Kun Liu, Jiazhao Wang
Α-Fe2o3/Graphene Nanocomposite As Anode Material For Sodium-Ion Batteries With Enhanced Capacity Retention, Zhijia Zhang, Yunxiao Wang, Shulei Chou, Huijun Li, Hua-Kun Liu, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
Among the different energy storage systems, rechargeable lithium-ion batteries (LIBs) have been widely applied in various portable electronic devices due to their high energy densities, long cycle life, and lack of significant memory effect [1]. For wide-scale implementation of renewable energy, LIBs, however, face challenges related to their safety, lifetime, and cost. Based on the wide availability and low cost of sodium, sodium-ion batteries (SIBs) have the potential for meeting the demands of large-scale and sustainable applications. Many cathode materials have been proposed, whereas only a few anode materials have been investigated for SIBs [2]. The sodium ion (1.02 Å) …
Enhanced Sodium-Ion Battery Performance By Structural Phase Transition From Two-Dimensional Hexagonal-Sns2 To Orthorhombic-Sns, Tengfei Zhou, Wei Kong Pang, Chaofeng Zhang, Jianping Yang, Zhixin Chen, Hua-Kun Liu, Zaiping Guo
Enhanced Sodium-Ion Battery Performance By Structural Phase Transition From Two-Dimensional Hexagonal-Sns2 To Orthorhombic-Sns, Tengfei Zhou, Wei Kong Pang, Chaofeng Zhang, Jianping Yang, Zhixin Chen, Hua-Kun Liu, Zaiping Guo
Australian Institute for Innovative Materials - Papers
Structural phase transitions can be used to alter the properties of a material without adding any additional elements and are therefore of significant technological value. It was found that the hexagonal-SnS2 phase can be transformed into the orthorhombic-SnS phase after an annealing step in an argon atmosphere, and the thus transformed SnS shows enhanced sodium-ion storage performance over that of the SnS2, which is attributed to its structural advantages. Here, we provide the first report on a SnS@graphene architecture for application as a sodium-ion battery anode, which is built from two-dimensional SnS and graphene nanosheets as complementary building blocks. The …
Enhanced Electrochemical Properties Of Cobalt Doped Manganese Dioxide Nanowires, Byoung Chul Kim, C Justin Raj, W J. Cho, W G. Lee, Hyeon Taek Jeong, K H. Yu
Enhanced Electrochemical Properties Of Cobalt Doped Manganese Dioxide Nanowires, Byoung Chul Kim, C Justin Raj, W J. Cho, W G. Lee, Hyeon Taek Jeong, K H. Yu
Australian Institute for Innovative Materials - Papers
The various molar concentrations of cobalt doped manganese dioxide (Co-MnO2) nanostructures were synthesized by an hydrothermal technique for electrochemical supercapacitor application. The X-ray diffraction analysis showed that the samples were composed of multiphase of MnO2 with dominant reflections of γ-MnO2 structure of crystallization. The morphological studies displayed the existence of MnO 2 nanowires with the width of 10-20 nm and showing a good degree of crystallization. The electrochemical characterization was performed using cyclic voltammetry, galvanostatic charge/discharge test and impedance spectroscopy in 1 M Na2SO4 aqueous electrolyte. All the samples exhibit a typical ideal capacitive behavior with an increasing order of …
Enhanced Visible-Light Photocatalytic Activity Of G-C3n4/Tio2 Films, Natkritta Boonprakob, Natda Wetchakun, Sukon Phanichphant, David Wexler, Peter Sherrell, Andrew Nattestad, Jun Chen, Burapat Inceesungvorn
Enhanced Visible-Light Photocatalytic Activity Of G-C3n4/Tio2 Films, Natkritta Boonprakob, Natda Wetchakun, Sukon Phanichphant, David Wexler, Peter Sherrell, Andrew Nattestad, Jun Chen, Burapat Inceesungvorn
Australian Institute for Innovative Materials - Papers
Enhanced photocatalytic degradation of methylene blue (MB) using graphitic carbon nitride/titanium dioxide (g-C3N4/TiO2) catalyst films has been demonstrated in this present work. The g-C3N4/TiO2 composites were prepared by directly heating the mixture of melamine and pre-synthesized TiO2 nanoparticles in Ar gas flow. The g-C3N4 contents in the g-C3N4/TiO2 composites were varied as 0, 20, 50 and 70 wt%. It was found that the visible-light-induced photocatalytic degradation of MB was remarkably increased upon coupling TiO2 with g-C3N4 and the best degradation performance of ∼70% was obtained from 50 wt% g-C3N4 loading content. Results from UV–vis absorption study, Electron microscopy, Fourier transform …
Pmn-Pt Based Quaternary Piezoceramics With Enhanced Piezoelectricity And Temperature Stability, Nengneng Luo, Shujun Zhang, Qiang Li, Qingfeng Yan, Wenhui He, Yiling Zhang, Thomas R. Shrout
Pmn-Pt Based Quaternary Piezoceramics With Enhanced Piezoelectricity And Temperature Stability, Nengneng Luo, Shujun Zhang, Qiang Li, Qingfeng Yan, Wenhui He, Yiling Zhang, Thomas R. Shrout
Australian Institute for Innovative Materials - Papers
The phase structure, piezoelectric, dielectric, and ferroelectric properties of (0.80-x)PMN-0.10PFN-0.10PZ-xPT were investigated systematically. The morphotropic phase boundary (MPB) was confirmed to be 0.30
A Solvothermal Strategy: One-Step In Situ Synthesis Of Self-Assembled 3d Graphene-Based Composites With Enhanced Lithium Storage Capacity, Jingjing Ma, Jiulin Wang, Yu-Shi He, Xiao Zhen Liao, Jun Chen, Jiazhao Wang, Tao Yuan, Zi-Feng Ma
A Solvothermal Strategy: One-Step In Situ Synthesis Of Self-Assembled 3d Graphene-Based Composites With Enhanced Lithium Storage Capacity, Jingjing Ma, Jiulin Wang, Yu-Shi He, Xiao Zhen Liao, Jun Chen, Jiazhao Wang, Tao Yuan, Zi-Feng Ma
Australian Institute for Innovative Materials - Papers
A facile and controllable approach has been developed to synthesize three-dimensional (3D) graphene-based monoliths. Here, as a proof-of-concept experiment, self-assembled 3D CoO/graphene sheets (CoO/GS) composites with porous structures have been successfully fabricated in an ethanol medium by a one-step, in situ growth, solvothermal method. During the process, the in situ nucleation and growth of CoO particles on GS were tuned by the formation of a 3D GS network. In the as-prepared composites, the self-assembled 3D GS network around the CoO particles can not only provide a 3D conductive matrix, but also buffer the volume changes of CoO and restrain the …
Edge-Enriched Graphene Quantum Dots For Enhanced Photo-Luminescence And Supercapacitance, Mahbub Hassan, Enamul Haque, Kakarla Raghava Reddy, Andrew I. Minett, Jun Chen, Vincent G. Gomes
Edge-Enriched Graphene Quantum Dots For Enhanced Photo-Luminescence And Supercapacitance, Mahbub Hassan, Enamul Haque, Kakarla Raghava Reddy, Andrew I. Minett, Jun Chen, Vincent G. Gomes
Australian Institute for Innovative Materials - Papers
Graphene quantum dots (GQDs) with their edge-bound nanometer-size present distinctive properties owing to quantum confinement and edge effects. We report a facile ultrasonic approach with chemical activation using KOH to prepare activated GQDs or aGQDs enriched with both free and bound edges. Compared to GQDs, the aGQDs we synthesized had enhanced BET surface area by a factor of about six, the photoluminescence intensity by about four and half times and electro-capacitance by a factor of about two. Unlike their non-activated counterparts, the aGQDs having enhanced edge states emit enhanced intense blue luminescence and exhibit electrochemical double layer capacitance greater than …
Enhanced Performance Of Dye-Sensitized Solar Cells Using Carbazole-Substituted Di-Chromophoric Porphyrin Dyes, Long Zhao, Pawel Wagner, Anastasia Elliott, Matthew Griffith, Tracey M. Clarke, Keith C. Gordon, Shogo Mori, Attila Mozer
Enhanced Performance Of Dye-Sensitized Solar Cells Using Carbazole-Substituted Di-Chromophoric Porphyrin Dyes, Long Zhao, Pawel Wagner, Anastasia Elliott, Matthew Griffith, Tracey M. Clarke, Keith C. Gordon, Shogo Mori, Attila Mozer
Australian Institute for Innovative Materials - Papers
The purpose of this work is to investigate the origin of improved photovoltaic performance of a series of di-chromophoric carbazole-substituted porphyrin dyes employed as sensitizers in dye-sensitized solar cells. Five di-chromophoric zinc porphyrin dyes with the same porphyrin core, a carbazole unit attached in the meso-position through a phenylethenyl linkage, and substituents spanning a range of electron affinities, in an attempt to tune the electronic level of the carbazole unit, have been synthesized (CZPs). Density functional theory (DFT) calculations predicted the nature of the electronic transitions observed in the CZP systems, showing a large degree of orbital mixing. In contrast, …
The Formation Of Nano-Layered Grains And Their Enhanced Superconducting Transition Temperature In Mg-Doped Fese0.9 Bulks, Feng Lan, Zongqing Ma, Yongchang Liu, Ning Chen, Qi Cai, Huijun Li, Shaon Barua, Dipakkumar Patel, Md Shahriar Hossain, Jung Ho Kim, S X. Dou
The Formation Of Nano-Layered Grains And Their Enhanced Superconducting Transition Temperature In Mg-Doped Fese0.9 Bulks, Feng Lan, Zongqing Ma, Yongchang Liu, Ning Chen, Qi Cai, Huijun Li, Shaon Barua, Dipakkumar Patel, Md Shahriar Hossain, Jung Ho Kim, S X. Dou
Australian Institute for Innovative Materials - Papers
To search a proper dopant to further improve superconductivity in 11 type Fe-based superconductors makes sense to both their superconductivity mechanism and possible technological applications. In present work, Mg doped FeSe polycrystalline bulks were obtained by a two-step solid-state reaction method. Even though there are many MgSe and iron impurities existing in the Mg heavy doped FeSe bulks, they exhibit obviously increased Tc compared to undoped FeSe sample. It was found that Mg addition has little effect on the crystal lattice parameters of superconducting beta-FeSe, whereas leads to the formation of nano-layered grain structure consisted of MgSe and beta-FeSe …