Electrochemical Performance of LiFePO4/C Positive-Electrode Material Prepared via a Rheological Phase Method

Jian He Hong; Chun Fang Bai; Gang He; Ming Zhong He; Hai Feng Li; Xin Yan Sun; Yan Fen Wang

doi:10.4028/www.scientific.net/AMR.415-417.1689

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Electrochemical Performance of LiFePO₄/C Positive-Electrode Material Prepared via a Rheological Phase Method

Abstract:

Positive-electrode material LiFePO₄/C was prepared using FePO₄•2H₂O as raw material via a rheological phase method. Orthogonal experiment was designed to systematically investigate the effects of the ratio of raw materials, calcining temperature and holding time on the morphology and electrochemical performance of LiFePO₄/C. The results showed that the optimal parameters were as follows: synthesis temperature 650 °C, time 10 h. The sample prepared with optimal parameters showed discharge capacities of 147.5 mAh•g^-1 at 0.2 C and 133.7 mAh•g^-1 at 1 C rate, with good cycle performance.