Abstract
Triboelectric nanogenerators (TENGs) have unparalleled performance advantages in the low-frequency range and become an emerging technology for efficient wave energy harvesting. There are various methods to improve the output performance of triboelectric nanogenerators, but the output effect and manufacturing convenience of the TENGs cannot be balanced, which limits their promotion and application in a wider field. Here, a gas-assisted triboelectric nanogenerator (GA-TENG) for harvesting wave energy is reported, which has high performance through a gas-assisted method. The gas-assisted device is mainly composed of two airbags and a flexible substrate to increase the actual contact area between the triboelectric layers, which increases the open-circuit voltage (Voc) and transferred charge (Qsc) by 7.99 and 13.86 times, respectively, compared to the rigid substrate. The power density of GA-TENG can reach 20.4 W/m3 under the wave frequency of 1 Hz. In addition, the applications of GA-TENG are successfully demonstrated, including powering three lamps of 3 W, a wireless temperature and humidity sensor, and a water level monitoring module. This work provides a design scheme for wave energy harvesting and a universal method for TENG to harvest renewable energy efficiently.
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