Bioinspired Liquid‐Free Ion‐Conductive Elastomers with Ultrahigh Mechanical Strength and Excellent Ionic Conductivity for Multifunctional Flexible Sensing Applications

• DOI: 10.1002/advs.202503510
• Publication Date: 2025-04-28T09:25:43Z
• Authors: Zequan Li; Jingjing Tang; Xuwei Wang; Fuqi Wang; Fangyan Ou; Wenyu Pan; Changsheng Wang; Ting Xie; Chuang Ning; Xiwei Xu; Jiamin Liu; Qihua Liang; Wei Gao; Shuangliang Zhao

Abstract Liquid‐free ion‐conductive elastomers with excellent mechanical and electrical conductivity are widely used in flexible sensors, wearable devices, soft touch screens, supercapacitors. However, the inherent contradiction between properties often limits development of liquid‐free elastomers. Therefore, preparation both high ionic remains a major challenge. In this study, polyurethane elastomer multiple crosslinking microphase‐separated structures were designed, inspired by “brick wall” structure pearl layer. A polyurethane‐based strength outstanding ion‐conducting was prepared introducing lithium bis(trifluoromethane)sulfoximide (LiTFSI) into elastomer. FLICE‐110% had (5.46 MPa), exceptional elongation at break (1213%), (3.29 × 10 −4 S cm −1 ), fracture energy (6.25 kJ m −2 ). Flexible sensors based on have realized applications multi‐channel strain remote‐controlled robots. addition, we successfully recovered LiTFSI from The these will be expected to show wide range skin, robotics, human‐machine interactions.