LiFePO_4正极材料改性研究进展  

Research progress on modification of LiFePO_4 positive material

作　　者：卢阳[1] 翁秀燕[1] 黄维静[1] 李变云[1] 童庆松[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007

出　　处：《电池工业》2009年第2期132-136,共5页Chinese Battery Industry

基　　金：教育部重点项目(编号03065;JA02159);福建省自然科学基金项目(编号E080303)

摘　　要：LiFePO4正极材料具有价格低廉、电化学循环稳定性及热稳定性好的优点,但由于自身的电子电导率、离子传导率较差,限制了其在大功率电池领域的应用。论述了近年来为增大LiFePO4材料的倍率性能而做的改性研究,从表面包覆、锂位掺杂、铁位掺杂、阴离子位掺杂等方面对国内外的发展动态进行了总结。LiFePO4 is one of the attractive cathode materials for its low cost , good cyclic stability and excellent thermal stability in Li-ion batteries. However, the cathode material has limited the application in the field of the high-power batteries for its intrinsic disadvantages of poor electronic and ionic conductivity and low density . The recent study works in the field of improving high-power performance of LiFePO4 was summarized in this paper. Several particular improving methods were carefully discussed, such as, surface coating, negative ion doping and cation ions doping in the lithium, iron, phosphate sites in structure of LiFePO4.

关 键 词：LIFEPO4 锂离子电池 正极材料 高倍率放电 

分 类 号：TM912.9[电气工程—电力电子与电力传动]