Coaxial Triboelectric Nanogenerator and Supercapacitor Fiber-Based Self-Charging Power Fabric

To meet the urgent demand for rapid advancement of wearable electronics, challenges are still remained in developing wearable and sustainable power sources with simple fabrication and low cost. In this work, we demonstrate a flexible and coaxial fiber by fabricating one dimensional triboelectric nanogenerator (TENG) outside and supercapacitor (SC) inside, which can not only harvest mechanical energy but also store energy in all-in-one fiber. In such coaxial fiber, carbon fiber bundles are utilized as the electrode material for TENG as well as the active and electrode material for SC. Meanwhile, silicone rubber is served as the separator between the SC and TENG, the triboelectric material of the TENG, and the encapsulation material for the whole fiber as well. Moreover, both of the SC and TENG exhibit good performance and stability, which ensures its long-term use in daily life. Due to the flexibility and durability of carbon fiber and silicone rubber, the proposed coaxial fibers show great flexibility, wh...