One-step synthesis LiMn2O4 cathode by a hydrothermal method |
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| Affiliation: | 1. School of Materials Science and Engineering, Anhui University of Technology, Ma’anshan, Anhui 243002, PR China;2. Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences, Hefei, Anhui 230026, PR China;1. Key Laboratory of Materials and Technology for Clean Energy, Ministry of Education, Key Laboratory of Advanced Functional Materials, Xinjiang Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, China;2. Institute for Superconducting & Electronic Materials, University of Wollongong, NSW 2522, Australia;3. Frontier Institute of Science and Technology Jointly with College of Science, Xi''an Jiaotong University, 99 Yanxiang Road, Yanta District, Xi''an Shaanxi Province 710054, China;1. Centre for Automotive Energy Materials, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Taramani, Chennai, 600 113, India;2. Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India;1. CAS Key Laboratory of Materials for Energy Conversions, Department of Materials Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, Anhui, China;2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;1. Institute of Electronic Materials Technology, Wólczyńska 133, 01-919, Warsaw, Poland;2. Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY, 40292, USA;3. University of Warsaw, Faculty of Physics, Pasteura 5, 02-093, Warsaw, Poland;4. Department of Materials Engineering, Tatung University, No. 40, 3rd Section, Zhongshan North Road, Taipei 104, Taiwan;5. Institute of Molecular Physics Polish Academy of Sciences, Smoluchowskiego 17, 60-179, Poznań, Poland;6. Department of Chemical Engineering, Tatung University, No. 40, 3rd Section, Zhongshan North Road, Taipei 104, Taiwan |
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| Abstract: | Spinel LiMn2O4 powders have been successfully synthesized by a hydrothermal method directly, which is no any pretreatment and following treatment in the process. The structure and morphology of the powders were studied in detail by means of X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and thermogravimetric analysis (TGA). The data reveal that the products have well-defined stable spinel structure, and the particles show distinctive crystal faces with 50–300 nm in particle sizes. The electrochemical characteristics of the spinel materials are measured in the coin-type cells in a potential range of 3.2–4.35 V versus Li/Li+. The as-synthesized LiMn2O4 delivers reversible capacity of about 121 mAh g−1 at a current density of 1/10 C. Cycled the cell to 40 cycles, the capacity remains at about 111 mAh g−1 at 1/2 C. |
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