Rapid advancements in stretchable and multifunctional wearable electronics impose a challenge on corresponding power devices that they should have comparable portability and stretchability. Here, we report a highly stretchable and washable all-yarn-based self-charging knitting power textile that enables both biomechanical energy harvesting and simultaneously energy storing by hybridizing triboelectrical nanogenerator (TENG) and supercapacitor (SC) into one fabric. With the weft-knitting technique, the power textile is qualified with high elasticity, flexibility, and stretchability, which can adapt to complex mechanical deformations. The knitting TENG fabric is able to generate electric energy with a maximum instantaneous peak power density of ∼85 mW·m^–2 and light up at least 124 light-emitting diodes. The all-solid-state symmetrical yarn SC exhibits lightweight, good capacitance, high flexibility, and excellent mechanical and long-term stability, which is suitable for wearable energy storage devices. The assembled knitting power textile is capable of sustainably driving wearable electronics (for example, a calculator or temperature–humidity meter) with energy converted from human motions. Our work provides more opportunities for stretchable multifunctional power sources and potential applications in wearable electronics.

中文翻译：

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一种由纤维摩擦纳米发电机和超级电容器组成的高度可拉伸和耐水洗的全纱线自充电针织强力织物

可伸缩和多功能可穿戴电子设备的快速发展对相应的功率设备提出了挑战，即它们应具有可比的便携性和可拉伸性。在这里，我们报告了一种高度可拉伸和可洗的全纱线自充电针织强力织物，该织物通过将摩擦电纳米发电机（TENG）和超级电容器（SC）混合到一种织物中，既可以进行生物机械能的采集，又可以进行能量的存储。通过纬编技术，动力织物具有高弹性，柔韧性和可拉伸性，可以适应复杂的机械变形。TENG针织物能够产生最大瞬时峰值功率密度为〜85 mW·m ^–2的电能并点亮至少124个发光二极管。全固态对称纱线SC显示出轻巧，良好的电容，高柔韧性以及出色的机械稳定性和长期稳定性，适用于可穿戴式储能装置。组装好的编织动力纺织品能够以人体运动产生的能量可持续地驱动可穿戴电子设备（例如计算器或温湿度计）。我们的工作为可伸缩多功能电源和可穿戴电子设备的潜在应用提供了更多机会。