锂离子电池容量衰减机理的研究进展

Progress in Capacity Fade Mechanism of Lithium Ion Battery

容量衰减是阻碍尖晶石锂锰氧化物商品化的主要障碍 ,正极活性材料的溶解、电解液的分解、钝化膜的形成等现象会引起充放电过程中不必要的副反应 ,这将导致电池容量的损失及衰减。本文总结了以尖晶石Li Mn O为阴极材料的电池的各种衰减现象的机理 ,并对各种机理做了比较和评价。提出了减少容量衰减的几种方法 ,并对尖晶石Li Mn O的发展作出展望。

Capacity fade is an obstacle to commercialize the lithium manganese oxide spinel. Unwanted side reactions due to active material dissolution, electrolyte decomposition, passive film formation, and other phenomeana occur during overcharge of overdischarge and cause the capacity loss or fade in these bateeries. The recent advances in capacity fade mechanisms of the spinel Li-Mn-O are reviewed, and different mechanisms are discussed and summarized. Some methods to reduce capacity fade and the development of the spinel Li-Mn-O are proposed.