Multipurpose Smart Textile with Integration of Efficient Energy Harvesting, All‐Season Switchable Thermal Management and Self‐Powered Sensing

Abstract Personal thermal management textile‐based triboelectric nanogenerator (PTMT‐TENG) integrates energy harvesting, thermo‐regulation, and self‐powered sensing with the inherent superiorities of textiles, making it a viable power source for wearable electronics. However, it faces limitations in environmental adaptability and all‐weather temperature control. Therefore, incorporating both functions into the same PTMT‐TENG poses a formidable challenge that has not been reported yet. Herein, a multipurpose smart textile‐based PTMT‐TENG is reported for the first time. This device consists of a dual‐mode switchable thermal‐management layer and a triboelectric layer, showcasing unparalleled adaptive phase‐change thermo‐regulation capabilities, enabling heating by 4.4 °C in a nighttime cold environment and cooling by 3.8 °C in a high‐temperature environment. Particularly, when further combined with efficient photothermal effect, the PTMT‐TENG demonstrates a warmth retention of up to 15.9 °C in cold daytime conditions. Compared with original TENG, this PTMT‐TENG has improved triboelectric output with a 325.8% increase in power density (8762 µW m −2 ) and possesses excellent flexibility, breathability, and self‐cleaning characteristics. This innovative device combines impressive electrical output with real‐time bidirectional switchable thermo‐regulation, providing a reference for the development of the next generation of multifunctional TENGs and shows immense potential across various application scenarios, paving a new path for the future development of smart textiles.