Flexible electronics have been rapidly developed in recent years. However, there are still some concerns about the degradation and short life caused by mechanical damage during their operation. Here, we present a self-healing electret nanogenerator (SENG) that can restore its structure and function after mechanical damage, benefiting from a healable polymer with reversible imine bond and the instantaneous healing ability of liquid metal. After destructive testing comprising four cutting-healing cycles the output current of the SENG autonomously recovers to the original values before damage. Finally, as a practical device, the SENG is demonstrated to work in both energy harvesting and human physiology-monitoring applications. This research offers a feasible route for improving reliability and lifetime of electret generators or other flexible electronics that suffer from mechanical damage.

近年来，柔性电子技术得到了快速发展。然而，仍然存在一些关于在其操作期间由于机械损坏而导致的退化和寿命短的担忧。在这里，我们介绍了一种自修复的驻极体纳米发电机（SENG），它可以在机械损伤后恢复其结构和功能，这得益于具有可逆亚胺键的可修复聚合物和液态金属的瞬时修复能力。在经过四个切割修复循环的破坏性测试后，SENG的输出电流会自动恢复到损坏之前的原始值。最后，作为一种实用的设备，SENG被证明可以在能量采集和人体生理监测应用中工作。