Journal
NANO ENERGY
Volume 61, Issue -, Pages 454-461Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2019.05.007
Keywords
Triboelectric nanogenerator; Self-repairable property; Superhydrophobicity; Water flow energy harvesting
Categories
Funding
- National Natural Science Foundation of China [51722510, 21603242]
- Key research project of Frontier Science of the Chinese Academy of Sciences, China [QYZDY-SSW-JSC013]
- outstanding youth fund of Gansu Province, China [1606RJDA31]
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A new repairable water-solid triboelectric nanogenerator (W-TENG) based on superhydrophobic surface is fabricated to harvest water-flow energy. The superhydrophobic triboelectrode with micro- and nanostructures is prepared by adhering polyvinylidene fluorid (PVDF) nanospheres to a polyimide (PI) film through a double-sided adhesive tape followed with a fluorination process. When water flows through the superhydrophobic surfaces with a flow rate of 0.3 m/s, the W-TENGs array could easily harvest water-flow energy to obtain a current output of 20 mu A which can light more than 30 commercial LEDs or be used for self-powered sensors to detect concentration change of chemicals pollutants in water. More importantly, when the superhydrophobic surface is damaged during long-term working, it could be self-repaired by releasing the fluorinated alkyl silane packed in pores of adhesive tape surface, and a self-repairable W-TENG is achieved. Given its easy fabrication and self-healing properties, the W-TENG and W-TENGs array have promising practical use in oceans and rivers energies harvesting, especially in some remote areas, for early warning, indicator light and self-powered detection sensors.
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