Although there has been rapid advancement in wearable electronics, challenges still remain in developing wearable and sustainable power sources with simple fabrication and low cost. In this work, we demonstrate a flexible coaxial fiber by fabricating a one-dimensional triboelectric nanogenerator (TENG) outside and a supercapacitor (SC) inside, which can not only harvest mechanical energy but also store energy in the all-in-one fiber. In such a coaxial fiber, carbon fiber bundles are utilized as the electrode material for the TENG as well as the active and electrode material for the SC. Meanwhile, silicone rubber serves as the separator between the SC and TENG, as the triboelectric material for the TENG, and as the encapsulation material for the whole fiber as well. Moreover, both SC and TENG exhibit good performance and stability, which ensures their long-term use in daily life. Because of the flexibility and durability of the carbon fiber and silicone rubber, the proposed coaxial fibers show great flexibility, which could be further knitted as cloth for sustainably powering wearable electronic devices. This work presents a promising platform for wearable electronics as well as smart textiles.

中文翻译：

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同轴摩擦电纳米发电机和超级电容器基于纤维的自充电功率布

尽管可穿戴电子设备已经取得了飞速发展，但是在以简单的制造和低成本开发可穿戴和可持续的电源方面仍然存在挑战。在这项工作中，我们通过在外部制造一维摩擦电纳米发电机（TENG）和在内部制造超级电容器（SC）展示了一种柔性同轴纤维，该纤维不仅可以收集机械能，而且可以将能量存储在多合一纤维中。在这样的同轴纤维中，碳纤维束被用作TENG的电极材料以及SC的活性和电极材料。同时，硅橡胶充当SC和TENG之间的分隔物，充当TENG的摩擦电材料，并且还充当整个纤维的封装材料。而且，SC和TENG都表现出良好的性能和稳定性，确保了它们在日常生活中的长期使用。由于碳纤维和硅橡胶的柔韧性和耐用性，所提出的同轴纤维显示出很大的柔韧性，可以将其进一步编织成用于可持续地为可穿戴电子设备供电的布。这项工作为可穿戴电子产品和智能纺织品提供了一个有前途的平台。