Hydrophobic organic coating based water--solid TENG for water-flow energy collection and self-powered cathodic protection

Abstract

Water–solid triboelectric nanogenerators (TENGs), as new energy collection devices, have attracted increasing attention in ocean energy harvesting and self-powered sensing. Polyacrylic acid (PAA) coating, usually used on the surface of marine equipment, has the property of anti-aging and anti-wear but limits triboelectrical output when used with TENGs. In this paper, polyacrylic acid coating was modified with fluorinated polyacrylate resin (F-PAA) to increase its triboelectrical output, by 6 times, and also to increase its anti-corrosion property. In addition, the corrosion resistance property can be further enhanced by cathodic protection using the electrical output generated by the water-flow triboelectrical energy transfer process. Given their easy fabrication, water-flow energy harvesting, and corrosion resistance, PAA/F-PAA coating-based TENGs have promising applications in river and ocean energy collection and corrosion protection.

Graphical abstract

Keywords

TENG / hydrophobic coating / energy collection / anticorrosion / cathodic protection

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Acknowledgements

Thanks for the financial support of the Program for Taishan Scholars of Shandong Province (No. ts20190965), the National Key Research and Development Program of China (2020YFF0304600), the Key Research Program of the Chinese Academy of Sciences (Grant No. XDPB24), the National Natural Science Foundation of China (Grant No. 51905518), and the Innovation Leading Talents Program of Qingdao (19-3-2-23-zhc) in China.

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