Abstract
Hydrovoltaic technology can directly obtain green energy from water flow and evaporation. In this study, a flexible rope-like hydrovoltaic generator was developed. The results demonstrated that enhanced streaming potential can be obtained through the flow of different electrolytes in the carbon black-based hyrovoltaic generator. The hydrovoltaic generator with a diameter of 5 mm and a length of 8 cm produced a maximum voltage of 0.66 V, a peak current of 873 μA and a peak power density of 26.4 μW cm−3 by using 1.25 mol/L FeCl3 solution. The performance of high merit can be attributed to increased potential difference on the asymmetric wetting device. By connecting four generators in series, a voltage of 1.2 V and a current of 0.7 mA were generated to drive the multi-function electronic watch to work normally. This study offers a novel approach for producing power by using carbon materials, promoting the further applications of hydrovoltaic technology.
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