Effect of synthesis temperature and molar ratio of organic lithium salts on the properties and electrochemical performance of LiFePO4/C composites |
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| Authors: | Zhongqi Shi Ming Huang Kerun Yang Xuebu Hu Bin Tan Xinglan Huang Zhenghua Deng |
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| Institution: | (1) Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, Sichuan, 610041, People’s Republic of China;(2) Graduate School of Chinese Academy of Sciences, Beijing, 100039, People’s Republic of China;(3) Department of Chemistry and Materials, Sichuan Normal University, Chengdu, Sichuan, 610068, People’s Republic of China;(4) Zhongke Laifang Power Science & Technology Co., Ltd, Chengdu, Sichuan, 610041, People’s Republic of China; |
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| Abstract: | LiFePO4/C cathode materials were synthesized through in situ solid-state reaction route using Fe2O3, NH4H2PO4, Li2C2O4, and lithium polyacrylate as raw materials. The precursor of LiFePO4/C was investigated by thermogravimetric/differential thermal analysis. The effects of synthesis temperature and molar ratio
of organic lithium salts on the performance of samples were characterized by X-ray diffraction, scanning electron microscopy,
electrochemical impedance spectra, cyclic voltammogram, and constant current charge/discharge test. The sample prepared at
optimized conditions of synthesis temperature at 700 °C and molar ratio with 1.17:1 exhibits excellent rate performance and
cycling stability at room temperature. |
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