High Performance Rotary-Structured Triboelectric-Electromagnetic Hybrid Nanogenerator for Ocean Wind Energy Harvesting

Modern ship is an important transportation and even military equipment on the ocean, which has ubiquitous ocean wind energy with high-speed and stable wind direction. However, much higher-speed wind energy during the movement of the ship is often abandoned. Triboelectric nanogenerator (TENG) that can generate electrical energy by scavenging ambient mechanical energy is one of the emerging energy harvesting technologies. By coupling the TENG and electromagnetic generators (EMG), a high-performance rotary-structured triboelectric-electromagnetic hybrid nanogenerator (RS-HG) is designed in this study. By introducing a matched inductor in the paired energy management circuit (EMC), the charging efficiency of RS-TENG can be effectively enhanced by 15 times compared to that without EMC. At a simulated wind speed of 15 m s(-1), the peak power of lateral TENG (L-TENG), top TENG (T-TENG) and EMG are 7.54, 7.85, and 22.5 mW, respectively. The demonstrated RS-HG comprising two RS-TENGs and one EMG can readily charge a 1 mF capacitor to 8 V within 15 s under the wind speed of 15 m s(-1) and continuously power the electronic devices. Moreover, the RS-HG can also successfully charge a smartphone through the step-down and voltage stabilization module to further expand its application scenarios. The applications of powering portable electronics reveal the huge prospects of hybrid nanogenerators in energy harvesting and self-powered environmental monitoring during navigation.