三元锂离子电池容量衰减机理研究进展

Research Progress in Capacity Fading Mechanisms of Ternary Lithium Ion Batteries

三元锂离子电池主要是指使用镍钴锰酸锂(NCM)或镍钴铝酸锂(NCA)作为正极材料的锂离子电池,三元锂离子电池广泛应用于电动汽车、3C电子产品、储能等领域。然而,三元锂离子电池的循环寿命已成为其进一步发展的最大障碍,因此了解三元锂离子电池的容量衰退机理具有重要意义。三元锂离子电池的衰退机理主要包括五个方面:晶体结构的改变和相变、活性材料的损失、电解质的分解和消耗、可脱嵌锂离子的损耗以及固体电解质界面的形成。本文总结了近年来相关方面的研究进展,以期更全面地总结三元锂离子电池的容量衰减机理,并对三元锂离子电池的应用前景进行了展望。

The ternary lithium ion battery mainly refers to the lithium ion battery using lithium nickel cobalt manganese oxide(NCM)or lithium nickel cobalt aluminum oxide(NCA)as the cathode electrode material.Ternary lithium ion batteries are widely used in electric vehicles,3C electronic products and energy storage.However,the cycle life of ternary lithium ion batteries has become the biggest obstacle to its further development.Therefore,understanding the failure mechanism of ternary lithium ion battery is of great significance.The failure mechanism of ternary lithium ion battery mainly include five aspects:lattice structure change and phase transition,loss of active material,electrolyte decomposition,deintercalable lithium ion's consumption and formation of solid electrolyte interface.In this paper,the research progress in related aspects in recent years is summarized,in order to provide a more comprehensive and integrative view of capacity fading mechanisms of ternary lithium ion batteries,and the application of ternary lithium ion batteries is also prospected.