高镍锂离子电池三元材料NCM电解质的应用  

Application of NCM electrolyte for nickel-rich lithium ion battery

作　　者：张文林[1] 刘雪娇 马青查 杨双丞 张永康 李春利[1] ZHANG Wenlin;LIU Xuejiao;MA Qingcha;YANG Shuangcheng;ZHANG Yongkang;LI Chunli(National-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization,School of Chemical Engineering,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学化工学院,化工节能过程集成与资源利用国家地方联合工程实验室,天津300310

出　　处：《化工进展》2021年第4期2175-2187,共13页Chemical Industry and Engineering Progress

基　　金：河北省高等学校科学技术研究项目(ZD2015118)。

摘　　要：高镍三元正极材料成本低、比容量高,符合锂离子电池可持续发展的理念,被认为是下一代的主流正极材料。但是,高镍材料需搭配合适的电解质才能有效发挥其性能,而这一研究很少被关注。因此,总结并选择适配的电解质对于高镍锂离子电池来说格外重要。本文简述了锂离子电池电解质的一般组成及其产生的电解质类型,重点综述了有机液体电解质、固体电解质及离子液体基电解质在高镍三元材料电池中的应用,并通过电解质的量化计算进行了验证总结。分析表明,离子液体-有机溶剂混合电解质在高镍三元材料(NCM)电池中具备更好的循环效果,同时满足了电池安全稳定的要求,更适合作为高镍材料电池的电解质。最后,针对混合电解质各溶剂间的相互作用机理及Li^(+)传输等分子动力学研究进行了展望。Nickel-rich ternary cathode materials have low cost and high specific capacity,which are suitable for the sustainable development of lithium-ion batteries and have been considered as the mainstream of next-generation cathode material.However,nickel-rich materials need to used together with suitable electrolytes to effectively give their best performance,which is however paid little attention.Selecting suitable electrolytes is particularly important for nickel-rich lithium-ion batteries.This paper briefly described the general types and composition of the electrolytes for lithium-ion battery.Next,we focused on the application of organic electrolytes,solid electrolytes and ionic liquid-based electrolytes in nickel-rich ternary material batteries,which were assessed through quantitative calculations.The results showed that the ionic liquid-organic solvent hybrid electrolyte presented very good circulation performance in nickel-rich NCM batteries,while meeting the requirements of the battery on safety and stability,and therefore was more suitable for nickel-rich NCM battery.Finally,the molecular dynamics studies on the interaction mechanism and Li+transport between different solvents of hybrid electrolyte were prospected.

关 键 词：高镍三元正极材料 锂离子电池 电解质 离子液体 量化计算 

分 类 号：TQ150.1[化学工程—电化学工业]