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Facile synthesis of free-standing nickel chalcogenide electrodes for overall water splitting

Journal of Energy Chemistry 2017年第6期26卷 1217-1222页

作者： Haonan Ren Zheng-Hong Huang Zhiyu Yang Shujun Tang Feiyu Kang Ruitao Lv State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China School of Chemical Engineering Beijing University of Chemical TechnologyBeijing 100029China Institute of Advanced Materials Graduate School at ShenzhenTsinghua UniversityShenzhen 518055GuangdongChina

Developing high-performance noble metal-free and free-standing catalytic electrodes are crucial for overall water splitting. Here, nickel sulfide（NiS） and nickel selenide（Ni Se） are synthesized on nickel foam（NF） with a one-pot solvothermal method and directly used as free-standing electrodes for efficiently catalyzing hydrogen evolution reaction（HER） and oxygen evolution reaction（OER） in alkaline *** virtue of abundant active sites, the NiS/NF and the NiS e/NF electrodes can deliver a current density of 10 m A cmat only 123 m V, 137 m V for HER and 222 m V, 271 m V for OER. Both of the hierarchical NiS/NF and Ni Se/NF electrodes can serve as anodes and cathodes in electrocatalytic overall watersplitting and can achieve a current density of 10 m A cmwith an applied voltage of.59 V and 1.69 V,respectively. The performance of as-obtained NiS/NF||NiS/NF is even close to that of the noble metalbased Pt/C/NF||IrO/NF system.

关键词： Overall water splitting Nickel chalcogenide Self-standing Solvothermal Active sites

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Nonvolatile Memory: Performance‐Enhancing Selector via Symmetrical Multilayer Design (Adv. Funct. Mater. 13/2019)

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advanced Functional materials 2019年第13期29卷

作者： Yiming Sun Xiaolong Zhao Cheng Song Kun Xu Yue Xi Jun Yin Ziyu Wang Xiaofeng Zhou Xianzhe Chen Guoyi Shi Hangbing Lv Qi Liu Fei Zeng Xiaoyan Zhong Huaqiang Wu Ming Liu Feng Pan Key Laboratory of Advanced Materials (MOE) School of Materials Science and Engineering Tsinghua University Beijing 100084 P. R. China Key Laboratory of Microelectronic Devices & Integrated Technology Institute of Microelectronics Chinese Academy of Sciences Beijing 100029 P. R. China National Center for Electron Microscopy in Beijing Key Laboratory of Advanced Materials (MOE) State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 P. R. China Institute of Microelectronics Tsinghua University Beijing 100084 P. R. China

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Ammonium [email protected] @manganese dioxide nanowire arrays with enhanced reversible lithium storage

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Applied Surface Science 2017年 416卷 402-410页

作者： Chang Wang Hui Liu Ming Jiang Yingde Wang Ruina Liu Zhiping Luo Xiaoqing Liu Weilin Xu Chuanxi Xiong Dong Fang College of Material Science and Engineering State Key Lab for New Textile Materials & Advanced Processing Technology Key Laboratory for New Textile Materials and Applications of Hubei Province Wuhan Textile University Wuhan 430070 PR China School of Metallurgy and Environment Central South University Changsha 410083 PR China Science and Technology on Advanced Ceramic Fiber and Composites Laboratory National University of Defense Technology Changsha 410073 PR China Department of Chemistry and Physics Fayetteville State University Fayetteville NC 28301 USA School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 PR China

Design and fabrication of novel optimized electrode materials are important for the development of new batteries for energy storage applications. Herein, we report on a hierarchical bulk electrode material with a tailored nanostructure that which consists of three components: a NH 4 V 4 O 10 nanowire as an active skeleton, an intermediate polymer layer (polypyrrole, PPy), and a metal oxide layer (MnO 2 ) as the outside shell. The NH 4 V 4 O 10 -PPy-MnO 2 nanowires exhibit present higher capacitance than that of the simple NH 4 V 4 O 10 -PPy [email protected] or NH 4 V 4 O 10 nanowires. The structure of double shells of combined PPy and MnO 2 is a key factor in enhancing their electrochemical performance including high specific capacitance and excellent cycling stability. Our V-based [email protected] @shell structure can serve as freestanding, compressible electrodes for various energy devices.

关键词： Ammonium vanadate Nanowire array [email protected] @shell structure Lithium ion battery

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Mg-Pillared LiCoO2: Towards Stable Cycling at 4.6 V

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Angewandte Chemie 2020年第9期133卷

作者： Yangyang Huang Yongcheng Zhu Dr. Haoyu Fu Mingyang Ou Dr. Chenchen Hu Sijie Yu Prof. Zhiwei Hu Prof. Chien-Te Chen Prof. Gang Jiang Hongkai Gu Prof. He Lin Prof. Wei Luo Prof. Yunhui Huang Institute of New Energy for Vehicles School of Materials Science and Engineering Tongji University Shanghai 201804 P. R. China Institute of Atomic and Molecular Physics Sichuan University Chengdu 610065 China State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 China Max Planck Institute for Chemical Physics of Solids Nöthnitzer Strasse 40 01187 Dresden Germany National Synchrotron Radiation Research Center 101 Hsin-Ann Road Hsinchu 30076 Taiwan Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201804 China

LiCoO 2 is used as a cathode material for lithium-ion batteries, however, cationic/anodic-redox-induced unstable phase transitions, oxygen escape, and side reactions with electrolytes always occur when charging LiCoO 2 to voltages higher than 4.35 V, resulting in severe capacity fade. Reported here is Mg-pillared LiCoO 2 . Dopant Mg ions, serving as pillars in the Li-slab of LiCoO 2 , prevent slab sliding in a delithiated state, thereby suppressing unfavorable phase transitions. Moreover, the resulting Li-Mg mixing structure at the surface of Mg-pillared LiCoO 2 is beneficial for eliminating the cathode-electrolyte interphase overgrowth and phase transformation in the close-to-surface region. Mg-pillared LiCoO 2 exhibits a high capacity of 204 mAh g −1 at 0.2 C and an enhanced capacity retention of 84 % at 1.0 C over 100 cycles within the voltage window of 3.0–4.6 V. In contrast, pristine LiCoO 2 has a capacity retention of 14 % within the same voltage window.

关键词： cathodes doping lithium magnesium materials science

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Nano‐Ferroelectric for High Efficiency Overall Water Splitting under Ultrasonic Vibration

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Angewandte Chemie 2019年第42期131卷

作者： Ran Su H. Alex Hsain Ming Wu Dawei Zhang Xinghao Hu Zhipeng Wang Xiaojing Wang Fa‐tang Li Xuemin Chen Lina Zhu Yong Yang Yaodong Yang Xiaojie Lou Stephen J. Pennycook College of Science Hebei University of Science and Technology Shijiazhuang 050018 China Materials Science and Engineering North Carolina State University Raleigh NC 27695 USA Frontier Institute of Science and Technology State Key Laboratory for Mechanical behavior of Materials Xi'an Jiaotong University Xi'an 710049 China School of Materials Science and Engineering University of New South Wales Sydney New South Wales 2052 Australia Micro/Nano Science and Technology Center Jiangsu University Zhenjiang 212013 China Department of Energy Science Sungkyunkwan University Suwon 16419 Republic of Korea State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal Materials Northwestern Polytechnical University Xi'an 710072 China Department of Materials Science and Engineering Faculty of Engineering National University of Singapore Singapore 117574 Singapore

Piezocatalysis, converting mechanical vibration into chemical energy, has emerged as a promising candidate for water‐splitting technology. However, the efficiency of the hydrogen production is quite limited. We herein report well‐defined 10 nm BaTiO 3 nanoparticles (NPs) characterized by a large electro‐mechanical coefficient which induces a high piezoelectric effect. Atomic‐resolution high angle annular dark field scanning transmission electron microscopy (HAADF‐STEM) and scanning probe microscopy (SPM) suggests that piezoelectric BaTiO 3 NPs display a coexistence of multiple phases with low energy barriers and polarization anisotropy which results in a high electro‐mechanical coefficient. Landau free energy modeling also confirms that the greatly reduced polarization anisotropy facilitates polarization rotation. Employing the high piezoelectric properties of BaTiO 3 NPs, we demonstrate an overall water‐splitting process with the highest hydrogen production efficiency hitherto reported, with a H 2 production rate of 655 μmol g −1 h −1 , which could rival excellent photocatalysis system. This study highlights the potential of piezoelectric catalysis for overall water splitting.

关键词： Ferroelektrische Phasen Phasenkoexistenz Piezokatalyse Piezoelektischer Effekt Wasserspaltung

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Rational construction the composite of graphene and hierarchical structure assembled by Fe2O3 nanosheets for lithium storage

Rational construction the composite of graphene and hierarch...

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第二届中国（国际）能源材料化学研讨会

作者： Yongjie Zhao Ximei Zhai Dong Yan Caihua Ding Nan Wu Dezhi Su Yuzhen Zhao Heping Zhou Xiuchen Zhao Jingbo Li Haibo Jin Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and Engineering Beijing Institute of Technology Department of Mechanical Engineering and State Key Laboratory of Tribology Tsinghua University State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University

Taking the advantage of hierarchical nanostructures into consideration,herein a facile and template free approach to achieve hierarchical microspheres assembled from theα-FeO nanosheet was *** followed freeze-drying ... 详细信息

关键词： Rational construction the composite of graphene and hierarchical structure assembled by Fe2O3 nanosheets for lithium storage

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Correction to Influence of PTFE on water transport in gas diffusion layer of polymer electrolyte membrane fuel cell [Int. J. Electrochem. Sci., 13 (2018) 3827-3842]

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International Journal of Electrochemical Science 2018年第6期13卷 6157-6157页

作者： Yanan Chen Tian Tian Zhaohui Wan Fan Wu Jinting Tan Mu Pan Hubei Key Laboratory of Fuel Cells State Key Laboratory of Advanced Technology for Materials Synthesis and Processing 430070 Wuhan China Wuhan WUT New Energy Co. Ltd 430223 Wuhan China

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Preparation and properties of polyurethane films with spent coffee grounds

Preparation and properties of polyurethane films with spent ...

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Chinese materials Congress on Functional and Functionally Structured materials, CMC 2015

作者： Li, Rui Xue Shen, Xiao Lin Zhou, Yi Wang, Hao Jiang, Shan Xu, Wei Lin College of Textile Science and Engineering Wuhan Textile University Wuhan China State Key Laboratory of New Textile Materials and Advanced Technology Wuhan Textile University Wuhan China

ISBN: (纸本)9783038357605

In this study, a method of recycling spent coffee grounds (SCG) is introduced. The SCG was dried and crushed into micron-sized coffee particles. The coffee particles could be used to prepared polyurethane (PU) films with different contents (0wt.%, 5wt.%, 10wt.%, 15wt.%, 20wt.%, 25wt.% and 30wt.%). The anti-ultraviolet property, thermal comfort performance and mechanical property of different PU films were measured. The results showed that after the blending of coffee particles, the films exhibited excellent anti-ultraviolet property and thermal comfort performance, and the mechanical properties were also retained. This study also provided an effective approach to reuse SCG, which is consistent with the environmental-friendly society principle. © 2016 Trans Tech Publications, Switzerland.

关键词： Blending

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Solid Electrolytes: A new Lithium‐Ion Conductor LiTaSiO5: Theoretical Prediction, materials Synthesis, and Ionic Conductivity (Adv. Funct. Mater. 37/2019)

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advanced Functional materials 2019年第37期29卷

作者： Qi Wang Jian‐Fang Wu Ziheng Lu Francesco Ciucci Wei Kong Pang Xin Guo State Key Laboratory of Material Processing and Die & Mould Technology Laboratory of Solid State Ionics School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 P. R. China Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology Clear Water Bay Hong Kong P. R. China Center for Information Photonics and Energy Materials Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 P. R. China Department of Chemical and Biological Engineering The Hong Kong University of Science and Technology Clear Water Bay Hong Kong P. R. China Institute for Superconducting & Electronic Materials University of Wollongong Wollongong New South Wales 2522 Australia

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Direct Imaging of a Zero-Field Target Skyrmion and Its Polarity Switch in a Chiral Magnetic Nanodisk

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Physical Review Letters 2017年第19期119卷 197205-197205页

作者： Fengshan Zheng Hang Li Shasha Wang Dongsheng Song Chiming Jin Wenshen Wei András Kovács Jiadong Zang Mingliang Tian Yuheng Zhang Haifeng Du Rafal E. Dunin-Borkowski Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute Forschungszentrum Jülich 52425 Jülich Germany Department of Physics University of New Hampshire Durham New Hampshire 03824 USA The Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory Chinese Academy of Sciences and University of Science and Technology of China Hefei 230026 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Jiangsu Province 210093 China National Center for Electron Microscopy in Beijing Key Laboratory of Advanced Materials (MOE) and the State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China

A target Skyrmion is a flux-closed spin texture that has twofold degeneracy and is promising as a binary state in next generation universal memories. Although its formation in nanopatterned chiral magnets has been predicted, its observation has remained challenging. Here, we use off-axis electron holography to record images of target Skyrmions in a 160-nm-diameter nanodisk of the chiral magnet FeGe. We compare experimental measurements with numerical simulations, demonstrate switching between two stable degenerate target Skyrmion ground states that have opposite polarities and rotation senses, and discuss the observed switching mechanism.

关键词： Magnetic texture Skyrmions

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