An acoustic-driven high-power rotary triboelectric generator

Abstract

To develop a high-power electrical source, we propose a non-contact fiber-reinforced rotary triboelectric generator (NFTEG), based on which an acoustic-driven NFTEG is also developed. Systematic experiments are conducted to investigate the characteristics of NFTEG. An open-circuit voltage of 3500 V and a short-circuit current of 0.38 mA are achieved, and the initial output current is sustained even after 500,000 cycles of continuous operation. Further, the performance of NFTEG reveals significant sensitivity to mean pressure and gas species variations, with the optimal mean pressure depending on gas species. A maximal output voltage of 3520 V is obtained in CO₂, revealing CO₂ as a proper gas for NFTEG. Importantly, in the experiments with the acoustic-driven NFTEG, a time-averaged electric power output as high as 1.46 W is obtained with 0.5-MPa CO₂ gas and an acoustic frequency of 35 Hz. These results shed light on the feasibility of the acoustic-driven NFTEG as a high-power electrical source, with the advantage of high reliability.