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Vol. 25 No. 7 (2013): Vol 25 Issue 7

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Preparation and Study on Electrochemical Performance of High-Rate LiFePO4/C Cathode Material

https://doi.org/10.14233/ajchem.2013.13658
Zhi-Peng Ma
College of Environmental and Chemical Engineering, Yanshan University, 438 Hebei Street, Qinhuangdao 066004, Hebei, P.R. China
Guang-Jie Shao
College of Environmental and Chemical Engineering, Yanshan University, 438 Hebei Street, Qinhuangdao 066004, Hebei, P.R. China ; State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, 438 Hebei Street, Qinhuangdao 066004, Hebei, P.R. China
Wei Wang
College of Environmental and Chemical Engineering, Yanshan University, 438 Hebei Street, Qinhuangdao 066004, Hebei, P.R. China
Chun-Ying Zhang
College of Environmental and Chemical Engineering, Yanshan University, 438 Hebei Street, Qinhuangdao 066004, Hebei, P.R. China

Corresponding Author(s) : Guang-Jie Shao

shaogj145@163.com

Asian Journal of Chemistry, Vol. 25 No. 7 (2013): Vol 25 Issue 7

Abstract

Carbon-coated LiFePO4 was synthesized by secondary ball-milling method. The structure of the material was systematically studied by X-ray diffraction and field-emission scanning electron microscopy. The particle size of the obtained LiFePO4/C composites was less than 300 nm and the tap density of the LiFePO4/C composites was 1.82 g/cm3. The electrochemical performance of the material was examined by cyclic voltammetry, electrochemical impedance spectra and constant current charge-discharge testing. The average discharge capacities of the LiFePO4/C composites were 133.4, 125.6, 114.2 and 94 mAh/g at rates of 1C, 2C, 5C and 10C, respectively. Even at 20C rate, the LiFePO4/C composites also showed the average discharge capacity of 81.3 mAh/g.

Keywords

Li-ion battery LiFePO4/C High-rate performance
Ma, Z.-P., Shao, G.-J., Wang, W., & Zhang, C.-Y. (2013). Preparation and Study on Electrochemical Performance of High-Rate LiFePO4/C Cathode Material. Asian Journal of Chemistry, 25(7), 3579–3582. https://doi.org/10.14233/ajchem.2013.13658
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