Li(Ni0.6Co0.2Mn0.2)O2锂离子电池常温失效机理

被引:0
|
作者
李丽娟
朱振东
邵素霞
彭文
机构
[1] 合肥国轩高科动力能源有限公司
基金
国家重点研发计划;
关键词
锂离子电池; Li(Ni0.6Co0.2Mn0.2)O2; 常温; 失效分析; 电荷转移阻抗;
D O I
10.19535/j.1001-1579.2021.03.004
中图分类号
TM912 [蓄电池];
学科分类号
摘要
研究Li(Ni0.6Co0.2Mn0.2)O2锂离子电池常温循环失效机理。对比电池循环前、中、后期的电化学阻抗谱、充放电曲线、材料结构及颗粒形貌,得出失效原因为:电荷转移阻抗增加,正极二次颗粒破碎导致内部微裂纹产生,以及过渡金属元素溶出并在负极沉积。控制正极体积的变化,减少内部微裂纹的产生,并阻止过渡金属元素的溶出与沉积,可延长电池的寿命。
引用
收藏
页码:229 / 232
页数:4
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