锂离子电池正极材料的研究进展

Research Progress for Cathode Materials of Lithium Ion Battery

锂离子电池具有工作电压高、能量密度大、工作温度范围宽、安全性能好等众多优点,因而成为近年来倍受关注的电动汽车动力电源之一。随着正极材料种类的更新,制备过程中多种改性方法的采用,如掺杂与包覆导电剂来提高正极导电率,减小粒径尺寸加快锂离子传导速率等方法,使锂离子电池电化学性能得到提高。本文综述了几种常见锂离子电池正极材料的研究现状与进展,重点对LiCoO2、LiNiO2、LiMn2O4、LiFePO4几种正极材料的晶体结构、性能、合成方法、以及掺杂与包裹改性进行了介绍,并对其发展趋势进行了展望。

Lithium ion battery has received particular interest as one of the motive power in recent years because of its high voltage,high energy density,wide range of operating temperatures,excellent safety and other advantages.The lithium-ion battery electrochemical performance has been improved with renew different type of cathode material and taking a variety of modified during the preparation,such as doping and coating the conductive agent to improve the cathode conductivity,reducing the particle size in order to accelerate the lithium-ion conductivity.Research situation and progress of anode material for lithium-ion batteries are summarized in this paper,focusing on introducing crystal structure,properties,synthesis method of several positive materials such as LiCoO2,LiNiO2,LiMn2O4,LiFePO4 and the developing trend of them is also prospected.