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Single-electrode triboelectric nanogenerators based on sponge-like porous PTFE thin films for mechanical energy harvesting and self-powered electronics

Abstract

Triboelectric nanogenerator (TENG) is a promising innovative energy conversation device to convert mechanical energy to electricity based on triboelectric friction. In this paper, we report a development of single-electrode TENG (S-TENG) based on sponge-like porous polytetrafluoroethylene (PTFE) thin films. The porous PTFE thin films were fabricated from a facile approach by using deionized (DI) water as the soft-template. The porosity effect on the output performance of the porous PTFE S-TENG was investigated under mechanical oscillations. The optimal porosity for achieving the maximum VOC output was found to be 5.1 V when the DI water volume fraction was 50%. The output voltage of the porous PTFE S-TENG is 1.8 times higher than that of the solid PTFE thin film based S-TENG under the same oscillation. The porous PTFE S-TENG can also generate considerable electricity by harvesting mechanical energy from human motions. The output voltage of 1.1 V was obtained when the S-TENG was pressed by a human bare hand. When pressed by a human hand within latex glove, the output voltage reached 6.9 V, and the generated electric energy could instantaneously power 5 commercial green light emitting diodes (LEDs) without any energy storage process. This development of the porous PTFE S-TENG could open a new avenue toward developing self-powered personal electronics, owing to its flexibility, simple one electrode structure, and the ability to harvest mechanical energy from human motions.

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Publication details

The article was received on 28 Mar 2017, accepted on 10 May 2017 and first published on 10 May 2017


Article type: Paper
DOI: 10.1039/C7TA02680C
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Single-electrode triboelectric nanogenerators based on sponge-like porous PTFE thin films for mechanical energy harvesting and self-powered electronics

    M. Wang, N. Zhang, Y. Tang, H. Zhang, C. Ning, L. Tian, W. Li, J. Zhang, Y. Mao and E. Liang, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA02680C

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