High-Performance Triboelectric Nanogenerator Employing Swing-Induced Counter-Rotating Motion Mechanism and Dual Potential Energy Storage and Release Strategy for Wave Energy Harvesting

Abstract

Triboelectric nanogenerator (TENG) has been proved to be a very promising marine energy harvesting technology. Here, we have developed a high-performance triboelectric nanogenerator (SD-TENG) with low friction, high durability, swing-induced counter-rotating motion mechanism (SICRMM) and dual potential energy storage and release strategy (DPESRS). The unique counter-rotating motion mechanism enables SD-TENG to convert the external linear and swing motion energy into the rotation motion energy of the inner and outer cylinders, and then convert it into a controllable power output. Benefitting from the SICRMM and DPESRS, the short-circuit current of SD-TENG can reach 51.2 μA which is more than 2 times higher than previous work. With the increase of external excitation, SD-TENG can automatically switch between intermittent rotation mode and continuous rotation mode. Its peak power density reaches 11.20 W/m3 and 20.21 W/m3 in two rotation modes, respectively. The non-contact working mode greatly improves the durability of SD-TENG, and it can still maintain 97.08 % of the electrical output after 120,000 cycles of continuous work. SD-TENG can supply power for wireless transmission module, realize wireless real-time monitoring of temperature and humidity, and successfully demonstrate some applications of intelligent ocean.