摘要
近年来随着新能源汽车技术的应用发展,人们需要开发出成本更低、比容量更高、可快速充放电的锂离子电池正极材料。富锂锰基正极材料具有高可逆比容量(>250 mAh·g^(-1))、低成本等优势,受到了人们的广泛关注。介绍了共沉淀法、溶胶凝胶法等富锂锰基正极材料的合成方法,阐述了该材料在首次库伦效率、容量保持率和倍率性能方面存在的问题,并分析了这些问题的产生原因及机理,详细综述该材料关于体相掺杂、表面包覆、核壳结构等改性方法的最新研究进展,最后对该材料今后的发展前景进行了展望。
In recent years, with the application and development of new energy vehicle technology, the lithium-ion batteries cathode material with lower cost, higher specific capacity, fast charging and discharging,need to be developed. Lithium-rich manganese-based cathode materials have the advantages of high reversible specific capacity(>250 m Ah·g^(-1)) and low cost, and have received widespread attention. In this article,the synthesis methods of lithium-rich manganese-based cathode materials were introduced, such as co-precipitation method and sol-gel method. The problems of the material in the first coulombic efficiency, the capacity retention and the rate performance were expounded, and the causes and the mechanisms about these problems were analyzed. The latest research progress in modification methods of the material such as bulk doping, surface coating, core-shell structure was reviewed in detail. In the end, the future development of the material was prospected.
作者
孙献智
李琪
乔庆东
肖伟
任铁强
于廷云
黄亮
宋楗
SUN Xian-zhi;LI Qi;QIAO Qing-dong;XIAO Wei;REN Tie-qiang;YU Ting-yun;HUANG Liang;SONG Jian(Graduate School,Liaoning Shihua University,Fushun 113001,China)
出处
《当代化工》
CAS
2021年第9期2211-2216,共6页
Contemporary Chemical Industry
基金
辽宁省自然科学基金(项目编号:20082187)。
关键词
富锂锰基
锂离子电池
正极材料
制备
改性
Li-rich manganese-based
Lithium-ion batteries
Cathode materials
Synthesis
Modification
