Environmental Self‐Adaptive Wind Energy Harvesting Technology for Self‐Powered System by Triboelectric‐Electromagnetic Hybridized Nanogenerator with Dual‐Channel Power Management Topology

Natural wind energy harvesting enables a far-reaching and sustainable solution to supply pervasive sensors in the Internet of Things (IoT). Electromagnetic generators (EMGs) struggle to harvest energy from breezes, which causes regrettable energy wastage. Herein, a triboelectric-electromagnetic hybridized nanogenerator (TEHG) is designed with a dual-rotor structure to consolidate harvesting band for high efficiency of triboelectric nanogenerators (TENGs) in breeze and the EMG in high wind speeds. The TEHG performs an efficient energy collection (41.05 W m(-3)) and a smooth output in the wind speed of 2-16 m s(-1), attributed to the environmental self-adaptive cooperation between TENGs and EMGs. The TENG output power contribution is more than 70% at low wind speeds (<5 m s(-1)). Moreover, a dual-channel power management topology (DcPMT) is established to co-manage outputs of two modules in TEHG. By virtue of the DcPMT hierarchically combining the isolated storage with undervoltagelockout strategy, the TEHG steadily supplies a standardized 3.3 V voltage for commercial electronics. Furthermore, a TEHG-based self-powered system is demonstrated for driving sensors to monitor meteorological information. The TEHG with DcPMT is advantageous in broad-band and high-efficiency of wind energy harvesting, thus exhibiting a great potential for elevating the environmental self-adaptability and stability margin of the IoT.