磷酸铁锂正极材料的制备及性能强化研究进展  

Research progress in synthesis and performance enhancement of LiFePO_(4) cathode materials

作　　者：张婷[1] 林森[1,2] 于建国[1,2] Zhang Ting;Lin Sen;Yu Jianguo(National Engineering Research Center for Integrated Utilization of Salt-Lake Resources,East China University of Science and Technology,Shanghai 200237,China;Engineering Research Center of Sal Lake Resources Process Engineering,Ministry of Education,East China University of Science and Technology)

机构地区：[1]华东理工大学国家盐湖资源综合利用工程技术研究中心,上海200237 [2]华东理工大学资源过程工程教育部工程研究中心

出　　处：《无机盐工业》2021年第6期31-40,共10页Inorganic Chemicals Industry

基　　金：国家自然科学基金(U20A20142、21978094);青海省重大科技专项(2019-GX-A7)。

摘　　要：橄榄石型磷酸铁锂是目前应用十分广泛的锂离子电池正极材料之一,具有成本低、安全性高、环境友好、循环寿命长和工作电压稳定的特点。近年来,随着CTP技术、刀片电池技术等取得的突破性进展,磷酸铁锂的商业化程度得到了大幅提高。但磷酸铁锂存在电子导电性较差和离子扩散系数低的缺陷,严重限制了锂离子电池的电化学容量,因此开展磷酸铁锂制备工艺和性能强化研究对磷酸铁锂的性能提升具有重要意义。对比了磷酸铁锂电池与其他正极材料锂离子电池的性能差异和发展现状,系统总结了磷酸铁锂正极材料制备与强化的改性方法及相关研究进展与挑战,并提出了未来的发展方向与研究思路。Olivine LiFePO_(4)is one of the most widely used cathode materials for lithium-ion batteries,with characteristics of low cost,high safety,environment-friendly,long cycle life and stable operating voltage.In recent years,with the breakthrough of CTP technology and blade battery technology,its commercialization progress has been greatly improved.However,LiFePO_(4)has the defects of poor electronic conductivity and low ion diffusion coefficient,which seriously limits the electrochemical capacity of lithium-ion battery.It is of great significance to study on the preparation process and performance enhancement of LiFePO_(4).In this paper,the differences of performance and development status of LiFePO_(4)and other cathode materials for lithium-ion batteries were compared.The modification methods of preparation and strengthening of LiFePO_(4)cathode materials and related research progress and challenges were systematically summarized,and the future development direction and research ideas were put forward.

关 键 词：磷酸铁锂 锂离子电池 正极材料 性能强化 

分 类 号：TQ131.11[化学工程—无机化工]