A Wind‐Driven Poly(tetrafluoroethylene) Electret and Polylactide Polymer‐Based Hybrid Nanogenerator for Self‐Powered Temperature Detection System

Abstract With growing interest in artificial intelligence and the Internet of Things, self‐powered electronics have gained considerable attention. In this investigation, a wind‐driven hybrid nanogenerator system comprising a poly(l‐lactic acid)‐based piezoelectric nanogenerator and a poly(tetrafluoroethylene) electret‐based triboelectric nanogenerator (E‐TENG) is proposed. At a wind speed of 5.1 m s⁻¹, the open‐circuit voltage (V_oc) and short‐circuit current (I_sc) of the hybrid nanogenerator (NG) reach ≈140 V and 16 µA, respectively. The maximum output power of the hybrid NG reaches ≈0.49 mW with a matching resistance of 8 MΩ, which is 22% larger than the output power of the E‐TENG. The hybrid NG can charge a lithium battery to 2.9 V in 8 h. Furthermore, the charged battery can be employed to drive an IR remote controlled light‐emitting diode lamp and turn the lamp on and off. In addition, it can be combined with a Bluetooth low energy (BLE) temperature sensor to form a self‐powered BLE temperature detection system. The hybrid NG shows great promise in self‐powered environmental monitoring and detection applications.