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.
作者
张文林
刘雪娇
马青查
杨双丞
张永康
李春利
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)
出处
《化工进展》
EI
CAS
CSCD
北大核心
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)。
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
nickel-rich ternary cathode material
lithium-ion battery
electrolytes
ionic liquids-based
quantitative calculation
作者简介
第一作者/通信作者:张文林(1968-),男,博士,教授,主要从事分离与纯化技术以及绿色化工方面的研究。E-mail:ctstzwl@163.com。
