正极材料LiFePO_4的制备及掺杂改性

Preparation and Doping Modification of LiFePO_4 Cathode Material

LiFePO_4具有原料丰富、热稳定性好、循环性能和安全性能优良,以及较高的比容量、稳定的工作电压和较长的循环寿命等优点,是极具发展前景的绿色环保材料。但LiFePO_4较低的电子导电率和离子扩散速率,造成其电化学性能不理想,并阻碍了其进一步的发展。本文综述了当前LiFePO_4的主要制备方法和特点以及LiFePO_4的掺杂改性的研究进展,并对LiFePO_4材料今后的研究重点进行了展望。

With abundant raw materials, good thermal stability, environmental benignity, excellent cycle performance and safety performance,and high specific capacity, stable working voltage and long cycle life, LiFePO4 cathode material is the very promising and more green environmentalprotection material. However, its low electron conductivily and ion diffusion rate, which leads to the poor electrochemical performance of LiFePO4,and hinders its further development. In this paper, the main preparation methods and characteristics of LiFePO4 and the research progress on doping modification of LiFePO4 are reviewed, also the future research emphasis of LiFePO4 material is prospected.