title: Boosted output performance of triboelectric nanogenerator via electric double layer effect.
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-2under 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.
authors.affiliation: School of Materials Science and Engineering, KIST-UNIST-Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea.
authors.forename: Jinsung
authors.initials: J
authors.lastname: Chun
authors.affiliation: School of Materials Science and Engineering, KIST-UNIST-Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea.
authors.forename: Byeong Uk
authors.initials: BU
authors.lastname: Ye
authors.affiliation: School of Materials Science and Engineering, KIST-UNIST-Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea.
authors.forename: Jae Won
authors.initials: JW
authors.lastname: Lee
authors.affiliation: Department of Mechanical Engineering, College of Engineering, Kyung Hee University, Seocheon-dong, Giheung-gu, Yongin-si 446-701, Korea.
authors.forename: Dukhyun
authors.initials: D
authors.lastname: Choi
authors.affiliation: KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea.|Center for Electronic Materials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.
authors.forename: Chong-Yun
authors.initials: CY
authors.lastname: Kang
authors.affiliation: School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 440-746, Korea.
authors.forename: Sang-Woo
authors.identifier: 0000-0002-0079-5806
authors.initials: SW
authors.lastname: Kim
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, USA.
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering, KIST-UNIST-Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea.
authors.forename: Jeong Min
authors.initials: JM
authors.lastname: Baik