Boosted output performance of triboelectric nanogenerator via electric double layer effect

Jinsung Chun, Byeong Uk Ye, Jae Won Lee, Dukhyun Choi, Chong-Yun Kang, Sang-Woo Kim, Zhong Lin Wang and Jeong Min Baik ()
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Jinsung Chun: School of Materials Science and Engineering, KIST-UNIST-Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST)
Byeong Uk Ye: School of Materials Science and Engineering, KIST-UNIST-Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST)
Jae Won Lee: School of Materials Science and Engineering, KIST-UNIST-Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST)
Dukhyun Choi: College of Engineering, Kyung Hee University, Seocheon-dong, Giheung-gu
Chong-Yun Kang: KU-KIST Graduate School of Converging Science and Technology, Korea University
Sang-Woo Kim: School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU)
Zhong Lin Wang: School of Materials Science and Engineering, Georgia Institute of Technology
Jeong Min Baik: School of Materials Science and Engineering, KIST-UNIST-Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST)

Nature Communications, 2016, vol. 7, issue 1, 1-9

Abstract: Abstract For existing triboelectric nanogenerators (TENGs), it is important to explore unique methods to further enhance the output power under realistic environments to speed up their commercialization. We report here a practical TENG composed of three layers, in which the key layer, an electric double layer, is inserted between a top layer, made of Al/polydimethylsiloxane, and a bottom layer, made of Al. The efficient charge separation in the middle layer, based on Volta’s electrophorus, results from sequential contact configuration of the TENG and direct electrical connection of the middle layer to the earth. A sustainable and enhanced output performance of 1.22 mA and 46.8 mW cm−2 under low frequency of 3 Hz is produced, giving over 16-fold enhancement in output power and corresponding to energy conversion efficiency of 22.4%. Finally, a portable power-supplying system, which provides enough d.c. power for charging a smart watch or phone battery, is also successfully developed.

Date: 2016
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DOI: 10.1038/ncomms12985

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