Wearable sensors based on flexible ionic conducive materials have attracted increasing attention in the past decade. However, most of the reported ionic conductors are mechanically weak, vulnerable under large deformation, and more importantly, lack the ability to self-heal or adhere to metal and tissue surfaces, which limited their applications and integration at the human–machine interfaces. Herein, we report a series of ionic conductor materials that exhibit high mechanical strength (up to 6.37 MPa) and toughness (up to 22.36 MJ/m³), enormous stretchability (>2000%), high transparency (>92% in the visible region) and skin-like strain-stiffening behavior. Composed of a hydrogen-bonded polymeric network of poly(acrylic acid) (PAA) and poly(ethylene oxide) (PEO) doped with lithium bis(trifluoromethane sulfonimide) (LiTFSI), the resulting PAA-PEO-Li ionic conductors show excellent self-healing ability, strong adhesion to metal and tissue surfaces, and good ionic conductivity (up to 8.78 mS/cm). Wearable sensors based on these ionic conductors are capable to precisely monitor human body motions and temperature change in real time by recording the resistance or capacitance variation, which may find applications as ionic skin in wearable ionotronic devices and health-care monitoring.

基于柔性离子导电材料的可穿戴传感器在过去十年中引起了越来越多的关注。然而，大多数报道的离子导体机械强度低，在大变形下易受伤害，更重要的是，缺乏自我修复或粘附在金属和组织表面的能力，这限制了它们在人机界面中的应用和集成。在此，我们报告了一系列具有高机械强度（高达 6.37 MPa）和韧性（高达 22.36 MJ/m ³）、巨大的拉伸性（>2000%）、高透明度（在可见区域>92%）和皮肤状的应变硬化行为。由掺杂双（三氟甲磺酰亚胺）锂（LiTFSI）的聚（丙烯酸）（PAA）和聚（环氧乙烷）（PEO）的氢键聚合物网络组成，所得的PAA-PEO-Li离子导体表现出优异的自- 愈合能力强，对金属和组织表面的附着力强，离子电导率好（高达 8.78 mS/cm）。基于这些离子导体的可穿戴传感器能够通过记录电阻或电容变化来实时精确监测人体运动和温度变化，这可能会在可穿戴离子电子设备和医疗保健监测中作为离子皮肤得到应用。