Electrospinning synthesis of novel lithium-rich 0.4Li2MnO3·0.6LiNi1/3Co1/3Mn1/3O2 nanotube and its electrochemical performance as cathode of lithium-ion battery |
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Authors: | Lei-Lei Cui Xiao-Wei Miao Yu-Feng Song Wen-Ying Fang Hong-Bin Zhao Jian-Hui Fang |
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Affiliation: | 1.Department of Chemistry, Shanghai University, Shanghai 200444, People's Republic of China;2.Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200072, People's Republic of China;3.Department of Chemical Engineering, University of Waterloo, Waterloo N2L3G1, Canada |
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Abstract: | In this study, a lithium-rich layered 0.4Li2MnO3·0.6LiNi1/3Co1/3Mn1/3O2 nanotube cathode synthesized by novel electrospinning is reported, and the effects of temperature on the electrochemical performance and morphologies are investigated. The crystal structure is characterized by X-ray diffraction patterns, and refined by two sets of diffraction data (R-3m and C2/m). Refined crystal structure is 0.4Li2MnO3·0.6LiNi1/3Co1/3Mn1/3O2 composite. The inductively coupled plasma optical emission spectrometer and thermogravimetric and differential scanning calorimetry analysis measurement supply reference to optimize the calcination temperature and heat-treatment time. The morphology is characterized by scanning and highresolution transmission electron microscope techniques, and the micro-nanostructured hollow tubes of Li-rich 0.4Li2MnO3·0.6LiNi1/3Co1/3Mn1/3O2 composite with outer diameter of 200-400 nm and the wall thickness of 50-80 nm are synthesized successfully. The electrochemical evaluation shows that 0.4Li2MnO3·0.6LiNi1/3Co1/3Mn1/3O2 sintered at 800 ℃ for 8 h delivers the highest capacity of the first discharge capacity of 267.7 mAh/g between 2.5 V and 4.8 V at 0.1C and remains 183.3 mAh/g after 50 cycles. The electrospinning method with heat-treatment to get micro-nanostructured lithium-rich cathode shows promising application in lithium-ion batteries with stable electrochemical performance and higher C-rate performance for its shorter Li ions transfer channels and stable designed structure. |
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Keywords: | Electrospinning Cathode Nanotube Lithium-rich Lithium battery |
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