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http://dx.doi.org/10.7234/composres.2018.31.6.365

Effect on TENG Performance by Phase Control of TiOx Nanoparticles  

Huynh, Nghia Dinh (Department of Mechanical Engineering, Kyung Hee University)
Park, Hyun-Woo (Department of Mechanical Engineering, Kyung Hee University)
Chung, Kwun-Bum (Department of Physics and Semiconductor Science, Dongguk University)
Choi, Dukhyun (Department of Mechanical Engineering, Kyung Hee University)
Publication Information
Composites Research / v.31, no.6, 2018 , pp. 365-370 More about this Journal
Abstract
One of the critical parameters to improve the output power for triboelectric nanogenerators (TENGs) is the surface charge density. In this work, we modify the tribo-material of TENG by introducing the $TiO_x$ embedded Polydimethylsiloxane (PDMS) in anatase and rutile phase. The effect of dielectric constant and electronic structure of the $TiO_x$ on the capacitance of TENG and the output power as well are discussed. The surface charge density is increased as the control of the dielectric constant in difference weight percent of $TiO_x$ and PDMS. As the results of that, the 5% $TiO_x$ rutile phase and 7% $TiO_x$ anatase phase embedded PDMS exhibit the highest TENG output. The peak value of voltage/current obtained from $TiO_x$ rutile and anatase phase are ${\sim}180V/8.2{\mu}A$ and $211.6V/8.7{\mu}A$, respectively, at the external force of 5 N and working frequency of 5 Hz, which gives over 12-fold and 15-fold power enhancement compared with the TENG based on the pristine PDMS film. This study provides a better understanding for TENG performance enhancement from the materials view.
Keywords
Triboelectric nanogenerators; $TiO_x$ nanoparticles; Anatase phase; Rutile phase; Dielectric constant;
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