Achieving Ultrarobust and Humidity‐Resistant Triboelectric Nanogenerator by Dual‐Capacitor Enhancement System

Abstract Triboelectric nanogenerators (TENGs) that can efficiently harvest ubiquitous mechanical energy provide a promising technology for the energy supply of intelligent electronic devices. However, the issues of low durability induced by wear and moisture sensibility of TENGs greatly limit their practical applications. Here, a no‐wear dual‐capacitor enhancement system (DCES) to simultaneously improve the service lifetime and electric performance of TENGs in a high humidity environment is proposed. The combination of low charge injection from lightly touched TENG and charge transfer in no‐wear DCES can synchronously realize ultralow material wear and charge pumping up. Therefore, the dual‐capacitor‐enhanced TENG (DCE‐TENG) achieves a long service life of at least 1 000 000 cycles with 15‐fold enhancement of matched average power. Furthermore, owing to the humidity resistance of DCES, the output performance of DCE‐TENG remains 95% of the initial value in 90% humidity. This work is expected to promote the commercial applications of TENGs.