A self-powered triboelectric negative ion generator in pipeline.

Indoor air quality plays a critical role in maintaining human health and well-being. In this study, a novel self-powered and high-efficiency negative air ion (NAI) generator in pipeline is proposed for air purification in the ventilation system. The self-power is achieved by utilizing a novel device of wind energy triboelectric nanogenerator (WE-TENG) to efficiently harvest wind energy in the pipeline. The present WE-TENG of investigation can reach a high rotation speed of 1300 rpm at 5.5 m/s in the pipe with a pressure drop of 175 Pa. After the power management circuit, the self-powered NAI generator is capable to drive 21 carbon-fiber electrodes to generate NAIs, with a generation rate of 23.14 μC/s. The self-powered NAI generator efficiently generates a high volume of NAIs in the pipeline, harnessing the air-purifying properties of NAIs, thereby making a significant impact on the practical application of self-powered indoor air purification systems based on TENG. [Display omitted] • A self-powered negative air ion generator is proposed for the ventilation system with a novel wind energy TENG. • The output characteristics of four types of power management circuits driven by TENG are investigated. • The generation of negative air ions is promoted by enhancing the electric field strength. • The performance of the power management circuit to drive NAI generator is quantified. [ABSTRACT FROM AUTHOR]