LiFePO₄ Cathode Materials for Lithium-ion Batteries

Lü Zhengzhong,  Zhou Zhentao
(College of Material Science and Engineering, South China University of Technology, Guangzhou  510641)

9Abstract  Research progress in recent years on the preparation, modification, how to control crystal size, relationship between structure and performance, and prospect of olivine-type lithium iron phosphate LiFePO₄ cathode materials for the lithium-ion batteries was reviewed. Particle size and its distribution, ionic and electronic conductivity, and the content of Fe(Ⅲ) have much effect on the performance of the samples. The use of inert gas, the addition of conductive dope, and the control of crystal size to gain nano-powder are the useful way to improve the electrochemical performance of LiFePO₄.
Key words   Lithium-ion batteries,  Cathode materials,  Lithium iron phosphate,  Modification

磷酸铁锂锂离子电池正极材料

吕正中  周震涛
(华南理工大学材料科学与工程学院  广州  510641)

摘要  从材料的制备、改性、粒径控制、结构与性能等几方面综述了近年来对橄榄石型磷酸铁锂(LiFePO₄)锂离子电池正极材料的研究进展。材料的粒度大小及其分布、离子和电子的传导能力以及其中Fe(Ⅲ)的含量对产品的电化学性能影响很大。在制备时，采用惰性气氛、掺杂导电材料和控制晶粒生长制备纳米粉体是获得性能优良的LiFePO₄的有效方法。
关键词  锂离子电池  正极材料  磷酸铁锂  改性

吕正中  男，33岁，博士生，现从事锂离子电池电极材料的研究。*联系人  E-mail:lzzmytan@163.com
2003-05-30收稿，2003-08-31接受

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