Self-powered triboelectric nanogenerators (TENG) have shown great potential in the field of electronic skin (E-skin). However, TENG is vulnerable to damage by frequent mechanical impacts during operation. In this work, a self-healable (≤ 2 h), super-stretchable (> 760%) and shape-adaptive TENG was designed as an E-skin to harvest energy and monitor human motion. The triboelectric layer is self-healing double-crosslinked polydimethylsiloxane (PDMS) prepared by adjusting the ratio of imine bonds to hydrogen bonds (H-bonds). The electrode layer is self-healable conductive composite prepared via the formation of H-bonds between MXene and lightly cross-linked PDMS. This TENG can be perfectly attached on the uneven human skin surface due to shape adaptability and can maintain original triboelectric performance after repeated damage. Also, our TENG can switch freely between single sensor and sensor arrays due to high self-healing efficiency, suggesting promising applications in E-skin and wearable device.

自供电摩擦纳米发电机（TENG）在电子皮肤（E-skin）领域显示出巨大的潜力。然而，TENG 在运行过程中容易受到频繁的机械冲击而损坏。在这项工作中，一种可自我修复（≤ 2 小时）、超拉伸（> 760%）和形状自适应的 TENG 被设计为一种 E 皮肤，用于收集能量和监测人体运动。摩擦电层是通过调节亚胺键与氢键（H键）的比例制备的自修复双交联聚二甲基硅氧烷（PDMS）。电极层是通过在 MXene 和轻度交联的 PDMS 之间形成 H 键而制备的自修复导电复合材料。这种TENG由于形状适应性，可以完美地贴附在不平整的人体皮肤表面，在反复损伤后仍能保持原有的摩擦电性能。还，