【摘要】 高压锂金属电池能有效助力高能量密度固态锂金属电池的开发,所用的固态锂金属电池高压正极需要匹配具有4.3V以上的电化学窗口(ESW)(相对于Li/Li+)的电解质。目前大多数固态聚合物电解质具有良好的界面相容性、机械性能和柔韧性,但是固态聚合物电解质在高氧化性电池的正极侧易发生严重的氧化分解而消耗掉部分电解质,且界面相容性也出现了明显的下降。基于此,本文综述了不同固态聚合物电解质的耐高压程度及其对应的影响因素,介绍了目前各种耐高压固态聚合物电解质的研究现状,重点介绍了引入氟基和氰基提高聚合物电解质耐高压性能的优化措施,最后对未来高性能耐高压聚合物电解质开发进行了展望。更多还原

【Abstract】 High-voltage lithium-metal batteries can effectively contribute to the development of high-energydensity solid-state lithium-metal batteries. In this way, the high-voltage cathode of the solid-state lithium-metal battery needs to be matched with an electrolyte with an electrochemical window(ESW)(relative to Li/Li~+) of 4. 3 V or more. Most of the current solid-state polymer electrolytes have good interfacial compatibility, mechanical properties, and flexibility, but solid-state polymer electrolytes are prone to severe oxidative decomposition on the anode side of highly oxidizable batteries consuming part of the electrolyte, and the interfacial compatibility also shows a significant decrease. Based on this, this paper reviews the degree of high-voltage resistance of different solid-state polymer electrolytes and their corresponding influencing factors, introduces the current research status of various highvoltage solid-state polymer electrolytes, focuses on the introduction of fluorine and cyano groups to improve the highvoltage performance of the polymer electrolytes, and finally looks forward to the development of high-performance high-voltage polymer electrolytes in the future.更多还原