Electrochemical properties of submicro-sized layered LiNi0.5Mn0.5O2 |
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| Institution: | 1. National Institute for Research and Development in Electrochemistry and Condensed Matter, Timisoara, 1 Plautius Andronescu, 300224, Timisoara, Romania;2. CNRS, Université de Bordeaux, ICMCB, 87 avenue du Dr. A. Schweitzer, Pessac, F-33608, France;3. Politehnica University of Timisoara, Pta Victoriei No. 2, 300006, Timisoara, Romania;1. Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Laboratory for Advanced Materials & Electron Microscopy, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100190, China;3. Chemistry Division, Brookhaven National Laboratory, Upton, NY 11973, USA;4. ICMCB, CNRS & University of Bordeaux, 87 Avenue Dr Albert Schweitzer, 33608 Pessac, France;5. Yangtze River Delta Physics Research Center Co. Ltd, Liyang 213300, China;1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;2. Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;3. College of Chemistry and Chemical Engineering, Hunan University of Science&Technology, Xiangtan 411201, China;4. Department of Materials Science and Engineering, Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials, Southern University of Science and Technology, Shenzhen 518055, Guangdong, China;1. Energy Systems Division, PCM Entity, Vikram Sarabhai Space Centre, Thiruvananthapuram 695022, Kerala, India;2. University of Kerala, Thiruvananthapuram 695034, Kerala, India;3. Materials Characterisation Division, MME, Vikram Sarabhai Space Centre, Thiruvananthapuram 695022, Kerala, India |
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| Abstract: | Submicro-sized layered LiNi0.5Mn0.5O2 was synthesized via an improved solid-state reaction, in which at first a precursor mixed by nickel manganese double hydroxide with lithium hydroxide solution was prepared in order to make the fully contact between these materials, and then was calcined at different temperatures. The heat treatment process and the crystal structure of materials were investigated by DTA, TGA, and XRD methods. The SEM images show that the particles of layered LiNi0.5Mn0.5O2 are submicrometer in size. It was found that the layered LiNi0.5Mn0.5O2 synthesized at 750 °C for 24 h in oxygen atmosphere presents the best electrochemical performance, which delivers an initial discharge capacity of 153 mAh/g in the charge/discharge potential region (vs. Li) of 2.5–4.3 V, and exhibits good cycle stability. |
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