化学研磨法制备磷酸铁锂正极材料的结构性能研究

Structural and Electrochemistry Performance of LiFePO_4 Cathode Material Prepared by Chemical Grinding Method

磷酸铁锂被认为是最有可能应用于锂离子动力电池的正极材料.采用化学研磨法制备了磷酸铁锂,并对其结构和电化学性能进行了研究.结果表明:相对于传统高温固相法,化学研磨法可以有效细化磷酸铁锂的颗粒和晶粒,所得材料0.1 C放电容量为132 mAh/g,明显高于传统固相法112 mAh/g的容量.

LiFePO4 is one of the most promising cathode materials for Lithium-ion batteries. LiFePO4 is synthesized by chemical grinding method, and the structure and electrochemical performances are studied. The results show that LiFePO4 prepared by chemical grinding method presents a discharge capacity of 134 mAh/g at 0. 1 C, which is much higher than that of the LiFePO4 prepared by solid reaction method. SEM and XRD test shows that chemical grinding method can reduce both the particle and the crystal size of the prepared material.