Robust Flexible Textile Tribovoltaic Nanogenerator via a 2D 2H‐MoS<sub>2</sub>/Ta<sub>4</sub>C<sub>3</sub> Dynamic Heterojunction
Beibei Fan, Zhaozheng Wang, Guoxu Liu, Zheng Wang, Xian Fu, Likun Gong, Chi Zhang
Abstract
Abstract The tribovoltaic effect can convert semiconductor interfacial frictional mechanical energy into direct current (DC) electricity, but the flexibility and durability of semiconductor materials limit its application in wearable electronic. Herein, a robust flexible textile tribovoltaic nanogenerator is presented based on a 2D dynamic heterojunction of 2H‐MoS 2 /Ta 4 C 3 (MTNG). During the friction process, a built‐in electric field ( E b ) and an additional interfacial electric field ( E CE ) are generated in a continuous dynamic contact of 2H‐MoS 2 /Ta 4 C 3 , and through the 2H‐MoS 2 /Ta 4 C 3 dynamic heterojunction, a significant number of electron‐hole pairs are excited and move directionally to generate a DC. The influences of mechanical pressure and sliding speed on output performance of MTNGs are systematically investigated. The MTNGs deliver excellent output power density (39.15 mW m 2 ) and outstanding robustness (43 000 cycles). Ten MTNGs can be connected in series to obtain a DC voltage of 3.3 V and in parallel to obtain a DC current of 75 µA. Furthermore, the MTNGs can effectively power a variety of commercial electronic watches and calculators by harvesting human kinetic energy. A 2D dynamic heterojunction 2H‐MoS 2 /Ta 4 C 3 DC nanogenerator is described and offers a workable option for the creation of flexible DC power sources and self‐powered wearable electronics.