新型锂离子固体电解质应用进展

Application progress on novel lithium ion solid electrolyte

传统的液体电解质在充放电的循环过程中易在负极产生枝晶,导致电池短路,且液体电解质存在易燃、易爆、泄露等安全问题。固体电解质能够很好的解决上述安全性问题,并且具有较好的稳定性,是替代液体电解质的不二选择。固体电解质需要满足高的离子电导率、宽的电化学窗口、优良的化学相容性、简单的制备工艺、低廉的成本等要求,因此需要进一步研发高性能固体电解质或电极/电解质界面改性材料,便于优化和提升固态电池的电化学性能。金属有机骨架和共价有机框架化合物是近年来新兴的、具有周期性结构的多孔材料,在电池领域的应用已经崭露头角。综述了金属有机骨架和共价有机框架化合物在固态锂离子电池上的应用及研究进展,并对如何改进金属有机骨架和共价有机框架固体电解质的电化学性能提出建议。

The traditional liquid electrolyte produce dendrites at the negative pole cycle,which cause short circuit of the battery.In addition,there areflammab,explos leak.Solid electrolyte can well solve the above safety problems,and have good stability,that replacement of liquid electrolyte.solid state electrolyte needs to satisfy the requirements,such as high ionic conductivity,wide electrochemical window,excellent chemical compatibility,simple preparation process,low cost and so on.Therefore,it is necessary to further develop high performance solid electrolyte and electrode/electrolyte interface modification materials to optimize and improve the electrochemical performance of solid state batteries.Metal organic frameworks and covalent organic frameworks compounds are newly developed porous materials with periodic structure,which have been widely used in the battery field.This paper reviews the applications and research progress of metal organic frameworks and covalent organic frameworks compounds in solid state lithium ion batteries.At last,how to improve the electrochemical performance of metal organic frameworks and covalent organic frameworks solid electrolytes give.