锂离子电池正极材料磷酸铁锂研究进展  

Research progress on anodic material for lithium-ion batteries-LiFePO_4

作　　者：胡成林[1] 代建清[1] 戴永年[1] 易惠华[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院

出　　处：《无机盐工业》2007年第4期8-11,共4页Inorganic Chemicals Industry

基　　金：云南省自然科学基金项目(2004E0009Q)

摘　　要：磷酸铁锂(LiFePO4)作为新一代锂离子电池正极材料,以其高安全性、稳定的循环性能、环境友好和价格低廉等优点引起了人们极大的关注,虽然它的研究时间比较短,但是很快实现了商品化。LiFePO4具有170 mA.h/g的理论比容量和3.5 V左右的平稳放电平台,由于存在电导率低的问题,它的大规模应用受到限制。从材料的制备和改性等方面综述了近年来LiFePO4材料的研究进展,比较了不同的合成方法及掺杂对材料性能的影响,认为掺杂少量高价金属离子是提高LiFePO4电导率的一种有效方法。继续进行深入的理论研究和进行工艺改进将是今后重点的研究方向。As an anodic material for the new generation of lithium - ion batteries, lithium iron phosphate （ LiFePO4） has attracted significant attention because of its high safety, stable cyclic performance, environment - friendly feature and low cost. It was realized commercialization soon, though its research time was short. LiFePO4 has a theoretical specific capacity of 170 mA · h/g and a stable voltage plateau around 3.5V vs. Li/Li^＋. However,the low electronic conductivity of LiFePO4 restricts its large - scale application. Research progress in recent years on the structure, preparation and modification of this material was reviewed. Influences of different synthesizing methods and doping on performances of LiFePO4 are compared. To dope metal elements with high valence would be an effective way to improve its electronic conductivity. The future study should be directed at the further theoretical study and process improvement.

关 键 词：锂离子电池 正极材料 磷酸铁锂 

分 类 号：TM912[电气工程—电力电子与电力传动]