Flexible, Eco-Friendly, and Superhydrophobic Textile-Based\nTriboelectric Nanogenerator for Biomechanical Energy Harvesting and\nSelf-Powered Human Motion Sensing

In\nrecent years, nonrenewable fossil energy consumption and environmental\npollution have led to widespread attention to the development and\nutilization of green energy. The emergence of triboelectric nanogenerators\nis one of the technologies that enables the utilization of renewable\nenergy. Many triboelectric materials have been developed; however,\nthe drawbacks of hydrophilicity and rigidity of materials have hindered\ntheir application. Here, a superhydrophobic flexible nanofiber membrane\n(HPP-NF) was prepared by electrospinning and spraying. Polycaprolactone\n(PCL), which is nontoxic and biodegradable, was used as the substrate,\ndoped with conductive nanoparticles, and finally, the fiber membrane\nwas modified by long-chain silane and silicon dioxide (SiO<sub>2</sub>). HPP-NF has excellent liquid repellency and self-cleaning properties.\nThe assembled HPP-TENG can achieve open-circuit voltage (<i>V</i><sub>OC</sub>) and short-circuit current (<i>I</i><sub>SC</sub>) of 150 V and 11 μA, respectively, and has stable\nelectrical output performance in high humidity environment. The HPP-TENG\ncan be used as a self-powered source to light up more than 236 LEDs\nand power small electronic devices, as well as for human movement\nmonitoring. This work provides a strategy for the development of flexible\nand eco-friendly as well as superhydrophobic textile-based triboelectric\nmaterials.