Improvement of electrochemical properties of LiFePO4/C cathode materials by chlorine doping |
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Authors: | Lin Yang Lifang Jiao Yanli Miao Huatang Yuan |
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Affiliation: | (1) Institute of New Energy Material Chemistry, Engineering Research Center of Energy Storage & Conversion (Ministry of Education), Tianjin, 300071, People’s Republic of China;(2) Key Laboratory of Energy–Material Chemistry (Tianjin), Nankai University, Tianjin, 300071, People’s Republic of China |
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Abstract: | The olivine-type cathode materials of LiFePO4 were prepared via solid-state reaction under argon atmosphere and doped by chlorine to improve their electrochemical performances. The crystal structure, morphology, and electrochemical properties of the prepared samples were investigated using thermogravimetry–differential scanning calorimetry, X-ray diffraction, Fourier transform infrared, scanning electron microscopy, cyclic voltammetry, and charge–discharge cycle measurements. The result showed that the electrochemical performance of LiFePO4 had been improved by chlorine doping, and the effect of chlorine in lattice was discussed. The heavily doped samples show better electrochemical performance in relative high rates. |
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Keywords: | LiFePO4 Cathode Lithium ion battery Dope |
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