A game-changing core-sheath yarn with large-scalable production to transform wool static nuisance into usable energy for wearable electronics

Wool fibers, commonly used in autumn-winter clothing, are prone to generating static electricity, leading to discomfort and safety concerns for wearers, thus posing a long-standing challenge for textile industry in developing simple and effective anti-static solutions. Herein, we introduce a game-changing core-sheath yarn (CSY) produced at a large scale (~ 6 m/min) through wrap spinning to transform wool's static nuisance into triboelectric energy. The CSY knitted fabric (CSYF) can simultaneously achieve excellent static elimination half-life (~ 0.21 s) and efficient energy conversion (~ 430 V, ~ 2.7 µA at 2 Hz). With good dyeability, considerably high flexibility (~ 200% stretchability), and exceptional output power (~ 740 mW m^{− 2}), surpassing most yarn-based triboelectric textiles, CSYF demonstrates applications in power sources and self-powered sensing. This work offers a dual-benefit proposal for the green and sustainable conversion and utilization of challenging energy sources.