Low hysteresis solid‐state ion‐conducting elastomers for low‐drift pressure sensing

Abstract Flexible iontronic pressure sensors with high sensitivity, low hysteresis, and low detection limit are increasingly demanded for wearable electronics and intelligent robotics. However, it remains challenging to combine these sensor performances due to inherent property trade‐offs in pressure‐sensitive ion‐conducting elastomers (ICEs), particularly among mechanical resilience, softness, and ionic conductivity. To address this issue, we propose a load‐bearing and mechanically reversible network design that integrates strong covalent crosslinks for mechanical elasticity, weak sacrificial bonds for softness, and dynamic coordination interactions to facilitate ion transport. Based on this strategy, our fabricated ICEs exhibit excellent elasticity (<5% hysteresis over 1000 tensile cycles), low elastic modulus (~66 kPa), intrinsic self‐healing capability, and high ionic conductivity (2.57 × 10 −4 S cm −1 at room temperature). The resulting iontronic sensor achieves high sensitivity (8.28 kPa −1 ), low detection limit (6 Pa), and minimal signal drift (~0.72% capacitance change over 10 h.). Finally, the superiority of the low drift iontronic sensor is demonstrated by a robotic gripper with high reliability. Therefore, this work provides a general design principle to reconcile competing demands in ICEs and enables the development of high‐performance, durable iontronic sensors for next‐generation wearable and robotic applications. image