马爱军,曹征领,陈永炜,季世超,钟允晖,吴浩,程琦
MA Aijun,CAO Zhengling,Chen Yongwei,JI Shichao,ZHONG Yunhui,WU Hao,CHENG Qi

• 1:浙江泰仑电力集团有限责任公司
• 2:国网浙江省电力有限公司湖州供电公司
• 3:浙江蓝盾电工新材料科技有限公司
• 4:华中科技大学电气与电子工程学院

摘要(Abstract)：

三元正极材料Li[Ni_(1_x)M_x]O_2因其高容量和高性价比,已然成为锂离子电池最重要的正极材料之一。虽然三元正极材料具有高比容量优势,但是在高电压循环下比容量衰减、容量保持率变差进而易导致安全性降低。由于材料本身结构稳定性及热稳定性较差(阳离子混排、不可逆相变、界面反应、微裂纹等失效途径)而引起的容量衰减阻碍了其应用进程。综述了近年来三元层状正极材料容量衰减导致失效的机理研究进展,总结了目前可以提高三元层状正极材料应用前景的改性方法,以期为三元正极材料在动力电池领域的更大规模应用提供解决方案。
Due to its high capacity and price-performance ratio, Li[Ni_(1_x)M_x]O_2 has become one of the most important cathode materials for lithium-ion batteries. Though the advantage of high specific capacity, the specific capacity attenuation and poor capacity retention of Li[Ni_(1_x)M_x]O_2 under a high-voltage cycle may result in poor safety. The capacity attenuation due to inferior structural stability and thermal stability(cation mixing, irreversible phase transition, interfacial reaction, microcrack) deters the application process of the material. This paper expounds degradation mechanism and research progress of Li[Ni_(1_x)M_x]O_2 layered cathode materials in the latest three years and summarizes the modification method that can improve the application prospect of the materials, in the hope of providing a solution to wider application of the materials in the power battery sector.

关键词(KeyWords)： 三元正极;失效;混排;相变;微裂纹
ternary cathode;degradation;mixing;phase transition;microcrack

Abstract:

Keywords:

基金项目(Foundation): 武汉应用基础研究计划（2018010401011285）

作者(Author): 马爱军,曹征领,陈永炜,季世超,钟允晖,吴浩,程琦
MA Aijun,CAO Zhengling,Chen Yongwei,JI Shichao,ZHONG Yunhui,WU Hao,CHENG Qi

DOI: 10.19585/j.zjdl.202101016

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