Abstract
The main challenge of wave energy utilization is to improve the low energy conversion efficiency. We report a novel triboelectric nanogenerator (TENG) based wave energy converter (WEC) control system that can significantly increase the energy harvesting efficiency via pressure control. We have identified that WECs have optimal damping corresponding to the maximum energy harvesting in different wave conditions. Hence, the optimal damping values can be applied via adjusting the pressure applied on the surface of TENG. When the external load is 1 MΩ, the instantaneous power output of the proposed TENG based WEC is able to reach 3.2 mW and the instantaneous maximum power output density arrives at 502 mW/m2 under the 8 cm wave height and 1.5 s time period condition, which shows strong power output capability and practical application potential of the TENG based WEC.
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