Preparation and Application of Cartilage Structure‐Inspired High Robust Solid‐State Ionic Conductive Elastomer in Pressure Sensor Arrays

Abstract Solid‐state ion‐conductive elastomers, vital components of flexible electronics, face challenges in simultaneously improving mechanical robustness and ionic conductivity. Inspired by cartilage architecture, this study proposes a synergistic strategy combining multi‐crosslinking and fluorine effects. A solid‐state ion‐conductive elastomer is developed by incorporating lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) into a fluorinated multi‐crosslinked polyurethane matrix. Owing to synergistic network interactions and fluorine effects, it exhibited excellent performance, including tensile strength of 3.74 MPa, toughness of 26.72 MJ m −3 , ionic conductivity of 3.57 × 10 −4 S cm −1 , outstanding environmental stability with conductivity variation < 5% after 60 days at room temperature, and 88% self‐healing efficiency. Flexible pressure sensors based on this conductor showed high sensitivity (2586 kPa −1 ), rapid response/recovery (40/120 ms), and ultralow detection threshold (40 Pa). By integrating the pressure sensor into dance mats, chessboards, handwriting recognition, and road condition recognition systems, precise tactile positioning and road condition sensing can be achieved. Moreover, pressure sensor arrays coupled with machine learning achieved 99.76% accuracy in distinguishing multiple sitting postures. In addition, the recycling and reuse of polyurethane elastomers with LiTFSI are realized through a solvent recovery method. This work demonstrates that high‐performance solid‐state ion‐conductive elastomers offer innovative solutions and practical pathways for advancing sustainable flexible electronics.