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Facile synthesis of lithium-vanadium-molybdenum oxide nanocomposite as high-performance anode material for lithium ion batteries
Affiliation:1. College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China;2. School of Metallurgy and Environment, Central South University, Changsha 410083, China;1. AGH – University of Science and Technology, Faculty of Non-Ferrous Metals, Poland;2. AGH – University of Science and Technology, Faculty of Metal Engineering and Industrial Computer Science, Poland;1. College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China;2. Laboratory of Environment Remediation and Function Material, Suzhou Research Institute of North China Electric Power University, Suzhou, Jiangsu 215213, China;1. Institute of Materials for Energy and Environment, School of Materials Science and Engineering, Qingdao University, Qingdao, 266071, China;2. School of Materials Science and Engineering, Hainan University, Haikou, 570228, China;3. College of Materials Science and Engineering, Hunan University, Changsha, 410082, China;4. School of Chemical Engineering, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia;1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China;2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China;1. School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha, 410114, China;2. Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Hunan, Changsha, 410004, China
Abstract:A lithium-vanadium-molybdenum-oxide composite has been prepared by a soft chemical route with mechanical activation assistance followed by low-temperature heat treatment in argon atmosphere. The X-ray diffraction reveals that the synthesized sample is made up of Li3V(MoO4)3 and LiVOMoO4 crystal phases. The SEM images show the fine particles ~300 nm in size. HRTEM image shows a clear crystal boundary between the two phases. The composite possesses good electrochemical performance as anode material. Particularly, it delivers an initial charge capacity of 927 mAh g−1 at 50 mA g−1 with a high initial coulombic efficiency of 81.2% and maintains 87.8% of its initial capacity after 50 cycles. Even if tested at 1000 mA g−1, it can deliver a reversible capacity of 542 mA h g−1.
Keywords:Lithium ion battery  Lithium-vanadium-molybdenum oxide  Nanocomposites  Mechanical activation  Energy storage and conversion
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