锂离子蓄电池纳米正极材料研究进展  

Research progress in nano-scale cathode materials for lithium-ion battery

作　　者：刘小虹[1] 余兰[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《电源技术》2003年第6期549-553,共5页Chinese Journal of Power Sources

摘　　要：纳米电极材料表现出许多优异的电化学性能:由于纳米电极材料比表面积大以及锂离子在纳米结构电极中扩散距离的显著缩短,可以减小电极的极化,提高电池的充放电容量;与普通微米级材料以适当比例混用时,可产生混配效应,提高电池的放电电压平台,改善电池的循环稳定性。介绍了锂离子蓄电池纳米正极材料LiCoO2、锂锰氧化物(LiMn2O4、LixMn2O4等,其中0.6≤x≤1.0)及其掺杂化合物的合成方法与特点,综述了这些纳米材料的电化学性能及其机理。The nano-scale electrode materials show excellent electrochemical properties: nano-scale materials can minish electrode polarization and improve battery charge-discharge capacity, because they have big specific surface area and the distance over which Li^+ must diffuse in the materials is reduced dramatically in the nanostructured electrode. While mixing with common micro-scale materials by certain proportion, they can bring mixing effect, enhance discharge voltage and improve cyclic stability. Recent progress on studies of the nano-scale cathode materials LiCoO_2, lithium manganese oxide and their doped-compounds for lithium-ion batteries were introduced. Their synthesis methods and properties were demonstrated in detail. Their electrochemical properties and the mechanism of electrochemical properties were reviewed.

关 键 词：锂离子蓄电池 电化学性能 纳米正极材料 充电容量 放电容量 电极 

分 类 号：TM912.2[电气工程—电力电子与电力传动]