Achieving High Power Density and Durability of Sliding Mode Triboelectric Nanogenerator by Double Charge Supplement Strategy

Abstract Triboelectric nanogenerators (TENGs), a promising energy harvesting technology for distributed power sources, faces inevitable issues regarding long‐term wear and durability. However, current low‐wear TENGs are impaired by lower performances due to low charge density. Here, both issues are addressed using a double charge supplement TENG (DCS‐TENG). Adding two low friction charge brushes allows the DCS‐TENG to achieve a high surface charge density (76.5 µC m⁻²) and power density (697.5 mW m⁻² Hz^–1), setting a new record among previously reported low‐wear TENGs. Moreover, the device exhibits unprecedented durability with an attenuation of only 5% after continuous operation for 110 h (3 960 000 cycles). Using a customized energy management module, a 3 × 7 hygrothermograph array, a high‐power vehicle's radar and accelerometer modules are stably powered, demonstrating the DCS‐TENG's strong electrical load capacity. This strategy provides a facile and effective path to conjointly boost power output and durability of TENGs, taking them to the next level for practical applications.