锂电池LiFePO4正极材料性能改善方法综述  

Summarization on Performance Improvement of LiFePO4 Cathode Materials for Lithium Ion Batteries

作　　者：郑宇 王杜 刘勇奇 巩勤学 ZHENG Yu;WANG Du;LIU Yong-qi;GONG Qin-xue(Hunan Brunp Recycling Technology Co.,Ltd.,Changsha 410600,China)

机构地区：[1]湖南邦普循环科技有限公司,长沙410600

出　　处：《有色金属（冶炼部分）》2020年第7期76-80,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2018YFC1901803)。

摘　　要：LiFePO4作为正极材料电化学性能优越,是发展潜力巨大的锂离子正极材料之一,但由于导电率和锂离子扩散速率问题,一直制约其发展。首先阐述了LiFePO4的微观结构、充放电原理以及充放电反应模型,回顾了近年来国内外改善磷酸铁锂的电化学性能所进行的研究,重点介绍了离子掺杂、碳包覆和材料纳米化方法对LiFePO4正极材料的影响以及目前仍然存在的问题,最后展望了该领域的发展趋势,并指出继续进行深入的理论研究和工艺改进是今后的重点研究方向。Lithium iron phosphate cathode material is considered as one of the most promising cathode materials for lithium ion batteries due to its excellent electrochemical properties.However,its development has been restricted by its low conductivity and slow diffusion rate of lithium ions.Crystal structure,charge-discharge principle and electrochemical reaction model of lithium iron phosphate are described firstly.Recent studies on improving electrochemical performance of lithium iron phosphate at home and abroad are reviewed.Influence of modification methods such as ion doping,carbon coating and nanomaterials on lithium iron phosphate cathode materials for lithium ion batteries and current existing problems are discussed.Finally,development trend in this field is prospected and it is suggested that further theoretical research and process improvement should be the key research direction in the future.

关 键 词：锂电池 正极材料 LIFEPO4 综述 

分 类 号：TQ131[化学工程—无机化工] TB34[一般工业技术—材料科学与工程]