改性钛酸锂负极材料的研究进展

Research Progress in Modified Lithium Titanate Anode Material

尖晶石型钛酸锂作为锂离子电池负极材料,在充放电过程中其晶体结构不会发生改变,不可逆容量损失较小,被称为"零应变"材料。它具有循环寿命长、充电过程快、安全性高等特性,符合下一代锂离子电池的要求。本文综述了钛酸锂负极材料的研究近况,着重阐述了纳米化、引入导电碳、金属元素掺杂、阴离子掺杂以及复合改性等方法对钛酸锂进行改性,探究对其电性能的影响和以后的发展方向。

Spinel Li4Ti5O12 has been used as an anode material for lithium ion batteries.This material has good reversibility without structural change（zero-strain material） in the charge-discharge process.It has excellent properties such as long cycle life,fast charging capability and high safety,which can meet the requirements for next generation lithium ion batteries.The recent research progress of lithium titanate was described in this paper,with the emphasis on the influences of modification methods on the electrochemical performance,including the preparation of nano-particles,the introduction of conductive carbons,doping with other metals or anions,and compounding modification methods.It is hoped that this discussion will help understand the further development of lithium titanante.