High‐Performance Constant Current Triboelectric Nanogenerator for Wind Energy Harvesting and Air Purification
Xingming Tao, Tingyu Wang, Liming Tan, Fan Xu, Ai Chen, Yuchen Yang, R. Zhang, Xue Wang
Abstract
ABSTRACT Effective wind energy harvesting represents a viable solution to the global energy shortage and environmental pollution. Triboelectric nanogenerators (TENGs) hold great potential in wind energy harvesting; yet, there is little research on constant current TENGs for this purpose. Herein, a novel rotary bicharacteristic current TENG (R‐BC‐TENG) with constant current output for ambient wind energy harvesting is proposed, which delivers a low crest factor of 1.0187. Through the synergistic integration of triboelectrification, electrostatic discharge, and electrostatic induction, an average power density of 2.4 W m −2 Hz −1 and a charge density of 1.86 mC m −2 for the R‐BC‐TENG are achieved, with the charge density surpassing that reported in most previous studies. The minimum starting wind speed of R‐BC‐TENG is as low as 2.8 m s −1 while maintaining 100% performance after 12,700 cycles. Moreover, a self‐powered air purification system, based on the R‐BC‐TENG, is developed, with the ability to generate 1,400,000 ions cm −3 and settle dust within 50 s. This work provides a paradigm for harvesting wind energy to achieve constant current output as well as safe and efficient air purification.