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Issue 78, 2017, Issue in Progress
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Effect of the relative permittivity of oxides on the performance of triboelectric nanogenerators

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Abstract

Since the working mechanism of triboelectric nanogenerators (TENGs) is based on triboelectrification and electrostatic induction, it is necessary to understand the effects of the inherent properties of dielectric materials on the performance of TENGs. In this study, the relationship between the relative permittivity and the performance of TENGs was demonstrated by fabricating TENGs using both pure oxide materials (SiO2, Al2O3, HfO2, Ta2O5 and TiO2) and oxide–PMMA composites. As oxide materials and PMMA are triboelectrically positive, PTFE film was selected as the counter tribo-material, which has highly negative triboelectric polarity. The triboelectric series of the above-mentioned oxides was experimentally organized to clarify the major parameter for the performance of TENGs. The electrical data values for both oxides and composites clearly showed a tendency to increase as the relative permittivity of the tribo-material increased. It is also well-matched with the theoretical analysis between the electrical performances (e.g. open-circuit voltage) and relative permittivity. However, such a tendency is not observed with the triboelectric polarity. Due to the tribo-material’s high relative permittivity, an open-circuit voltage of 124.1 V, a short-circuit current of 14.88 μA and a power of 392.08 μW were obtained in a pure TiO2 thin film.

Graphical abstract: Effect of the relative permittivity of oxides on the performance of triboelectric nanogenerators

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Publication details

The article was received on 01 Jul 2017, accepted on 11 Oct 2017 and first published on 23 Oct 2017


Article type: Paper
DOI: 10.1039/C7RA07274K
RSC Adv., 2017,7, 49368-49373
  • Open access: Creative Commons BY license
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    Effect of the relative permittivity of oxides on the performance of triboelectric nanogenerators

    Y. J. Kim, J. Lee, S. Park, C. Park, C. Park and H. Choi, RSC Adv., 2017, 7, 49368
    DOI: 10.1039/C7RA07274K

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