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

摘要

Triboelectric nanogenerators (TENGs), a promising energy harvesting technologyfor distributed power sources, faces inevitable issues regarding longtermwear and durability. However, current low-wear TENGs are impairedby lower performances due to low charge density. Here, both issues areaddressed using a double charge supplement TENG (DCS-TENG). Addingtwo low friction charge brushes allows the DCS-TENG to achieve a high surfacecharge 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 only5 after continuous operation for 110 h (3 960 000 cycles). Using a customizedenergy management module, a 3 × 7 hygrothermograph array, ahigh-power vehicle's radar and accelerometer modules are stably powered,demonstrating the DCS-TENG's strong electrical load capacity. This strategyprovides a facile and effective path to conjointly boost power output anddurability of TENGs, taking them to the next level for practical applications.