A self‐healing polymer electrolyte based on the Diels – Alder reaction in lithium‐ion batteries

作者：Juansu Zhang, Guoliang Bai, C. A. Wang, Tingqing Geng, Jianyu Wang, Xingjiang Liu, Xuehua Zhou, Jianli Zhang · 发表于：Journal of Applied Polymer Science · 年份：2024 · DOI：10.1002/app.55473 · 被引用次数：11 · 研究领域：Polymer composites and self-healing、Conducting polymers and applications、Advanced Battery Materials and Technologies

Abstract In lithium‐ion batteries, the polymer electrolyte was susceptible to mechanical damage from external stimuli or internal expansion caused, which in turn affected the performances of the batteries. The thermally reversible self‐healing gel polymer electrolyte (DASHPE) based on the Diels–Alder reaction was prepared to solve the above problems. The DASHPE electrolytes exhibited good flexibility and self‐healing ability, achieving self‐healing at 80°C for 30 min. Furthermore, the DASHPE electrolyte exhibited excellent thermal stability and could withstand temperatures above 300°C. Additionally, it had a wide electrochemical window (about 5 V) and good electrochemical performances. Serving as the electrolyte in lithium‐ion batteries, DASHPE‐2 showed an initial specific capacity of 133.11 mAh g −1 at 0.1 C. The DASHPE electrolyte was expected to be a candidate material for self‐healing battery.