Achieving Self‐Enhancing Bi‐Characteristic Current Triboelectric Nanogenerator by Intrinsic Electric Field Superposition

ABSTRACT The bi‐characteristic current triboelectric nanogenerator (BC‐TENG), which synergistically utilizes triboelectrification, electrostatic induction, and electrostatic discharge, features a simple structure, low cost, and flexible output modes, making it a promising candidate for powering distributed electronics in the expanding Internet of Things (IoT). However, practical deployment remains hindered by insufficient output and energy losses arising from conventional multi‐unit integration strategies. Herein, a self‐enhancing integration strategy is proposed to enable effective power superposition while simultaneously optimizing the performance of each individual unit. By leveraging the intrinsic electric field originating from residual tribo‐charges on the electret, a vertically stacked architecture is developed, in which individual BC‐TENG components mutually reinforce each other through electric field superposition. Under rotary mode, the self‐enhancing BC‐TENG (SE‐BC‐TENG) delivers a stable current output with a power density of up to 9.66 W/m 2 /Hz. This work provides a new insight into enhancing the output performance and achieving effective integration of the BC‐TENG, offering a promising route toward scalable, high‐performance energy solutions for next‐generation IoT devices.