Polymers with Intrinsic Microporosity as Solid Ion Conductors for Solid‐State Lithium Batteries

作者：Xiaoxue Wang, Lina Song, Lijun Zheng, De‐Hui Guan, Cheng‐Lin Miao, Jia‐Xin Li, Jianyou Li, Ji‐Jing Xu · 发表于：Angewandte Chemie International Edition · 年份：2023 · DOI：10.1002/anie.202308837 · 被引用次数：54 · 研究领域：Advancements in Battery Materials、Advanced Battery Materials and Technologies、Advanced Battery Technologies Research

Abstract Solid‐state electrolytes (SSEs) with high ionic conductivity and superior stability are considered to be a key technology for the safe operation of solid‐state lithium batteries. However, current SSEs are incapable of meeting the requirements for practical solid‐state lithium batteries. Here we report a general strategy for achieving high‐performance SSEs by engineering polymers of intrinsic microporosity (PIMs). Taking advantage of the interconnected ion pathways generated from the ionizable groups, high ionic conductivity (1.06×10 −3 S cm −1 at 25 °C) is achieved for the PIMs‐based SSEs. The mechanically strong (50.0 MPa) and non‐flammable SSEs combine the two superiorities of outstanding Li + conductivity and electrochemical stability, which can restrain the dendrite growth and prevent Li symmetric batteries from short‐circuiting even after more than 2200 h cycling. Benefiting from the rational design of SSEs, PIMs‐based SSEs Li‐metal batteries can achieve good cycling performance and superior feasibility in a series of withstand abuse tests including bending, cutting, and penetration. Moreover, the PIMs‐based SSEs endow high specific capacity (11307 mAh g −1 ) and long‐term discharge/charge stability (247 cycles) for solid‐state Li−O 2 batteries. The PIMs‐based SSEs present a powerful strategy for enabling safe operation of high‐energy solid‐state batteries.