Enhanced Performance of Triboelectric-Electromagnetic Hybrid Generator with Slit Effect for Broad-Band Wind Energy Harvesting

Abstract

The flow augmentation electromagnetic generator (EMG) with a wind deflector structure has been widely studied. However, the wind energy flowing through the wind deflector of the traditional EMG is not effectively harvesting. As a renewable energy harvesting technology, triboelectric nanogenerator (TENG) has a flexible structural design, making it highly compatible with a wind deflector as a new power generation unit, thus achieving the goal of hybrid generation. In this regard, this work proposes a novel wind-gathering enhanced triboelectric-electromagnetic hybrid generator (WGE-TEHG). Coupling the thin-film vibrating TENG and the wind deflector, the WGE-TEHG not only retains the function of flow augmentation EMG, but also generates additional power output by integrating the wind deflector with TENG structure. The experimental results show that the WGE-TEHG as a generator for harvesting wind energy, which can output a total power of 212.4 mW. In addition, the WGE-TEHG can build a self-powered natural environment micro-meteorological sensing system. It can sense wind direction, wind speed, temperature, and relative humidity in the environment. This research has great application value for the self-powered sensing implementation of hybrid TENG and EMG.

Keywords: triboelectric nanogenerators, wind-gathering structure, flow augmentation, slit effect, micrometeorological monitoring