Multifunctional integration and heterogeneous surface integration are two crucial challenges in the in-depth use and development of triboelectric nanogenerators (TENGs) in the wearable electronic field. A promising solution is to develop stretchable TENGs (STENG), which have the potential for microenergy supply and self-powered sensing. The key challenge is to endow its functional components with good deformability and realize heterogeneous surface integration. Herein, we proposed a fully stretchable, surface adaptable TENG using stretchable micro-nano hierarchical friction interfaces. It integrated microenenrgy supply and multifunctional self-powered sensing (i.e., bend, force, and frequency sensing) abilities successfully. The highly-linear sensing abilities endows the STENG with a good biometric ability. As an application, a STENG array based-stretchable wearable keyboard was proposed. It identified dynamic keystroke motions of all users with a Support Vector Machine, with a high accuracy of 93.21%. Besides, the intruders who were not sampled were distinguished from users, with an accuracy of 81.50%.

多功能集成和非均相表面集成是摩擦纳米发电机 （TENG） 在可穿戴电子领域深入应用和发展的两大关键挑战。一个很有前途的解决方案是开发可伸缩的 TENG （STENG），它具有微能量供应和自供电传感的潜力。关键挑战是赋予其功能组件良好的变形能力并实现异构表面集成。在此，我们提出了一种使用可拉伸微纳米分层摩擦界面的完全可拉伸、表面适应性强的 TENG技术。它成功地集成了微能量电源和多功能自供电传感（即弯曲、力和频率传感）功能。高度线性的传感能力赋予了 STENG 良好的生物识别能力。作为一项应用，提出了一种基于 STENG 阵列的可拉伸可穿戴键盘。它使用支持向量机识别所有用户的动态击键动作，准确率高达 93.21%。此外，未采样的入侵者与用户进行了区分，准确率为 81.50%。