LiFePO4正极材料存在的问题及改进方法

锂离子电池正极材料正在向着高比能量、长寿命、低成本、环境友好的方向发展,而具有橄榄石结构的LiFePO4正极材料以其结构稳定、成本低、无污染等优点成为21世纪最理想的绿色电源,但自身也存在缺点.综述了锂离子电池正极材料LiFePO4的发展状况,从物质结构与电化学特性出发指出了其存在的问题.重点介绍了国内外为改进LiFePO4正极材料的综合性能而进行的有关制备方法以及对其改性的研究.

Disadvantage and Betterment of LiFePO4 Cathode Material

The cathode materials of lithium ion battery were developing towards the direction of high specific energy , long last cycling life, low cost, and environmental benignity, while LiFePO4 possessing the olivine type crystal would be the most promising green battery in the 21st century for its stable structure,low cost,and no pollution,but it also had some disadvantages. The development of LiFePO4 as cathode of lithium ion battery was reviewed in this paper. The existent problems were pointed out from the aspects of the structure and electrochemistry property of LiFePO4.The researchs on preparation methods and modification for enhancing the electrochemical performance of LiFePO3 in China and other countries were also introduced.