大功率锂离子电池正极材料LiFePO_4的研究进展

Research and Progress of LiFePO_4 as Cathode Material for High-Powered Lithium Ion Battery

具有橄榄石结构的磷酸铁锂(LiFePO4)作为新兴的一种大动力锂离子电池的正极材料,具有安全性好、绿色环保、价格低廉、循环性能好、结构稳定等优点,是电动汽车、航天器以及大功率动力设备极其理想的高能电池正极材料。综述了LiFePO4作为正极材料的结构特点和充放电机理,以及电化学性能和近几年来优化改性的方法,并展望了LiFePO4正极材料的研究方向和应用方向。

As an emerging cathode material of lithium ion battery, olivine--type lithium iron phos- phate（LiFeEO4 ） has advantage in safety performance, non--toxicity, lowe--cost, cycling perform- ance, and high structural stability. It is the promising cathode material for high--current battery used in electric-- power vehicles, spacecrafts and other high-- power devices. The detailed review about LiFePO cathode materials of its structural feature, charge and discharge mechanism, electrochemical property, and performance modification were reviewed according to recent years research. The future research and application directions were also prospected at the end of the article.