Dipole-moment-induced effect on contact electrification for….pdfVIP

Nano Research 2014, 7(7): 990–997 DOI 10.1007/s12274-014-0461-8 Dipole-moment-induced effect on contact electrification for triboelectric nanogenerators 1,2,§ 1,§ 1,§ 1 2 2 Peng Bai , Guang Zhu , Yu Sheng Zhou , Sihong Wang , Jusheng Ma , Gong Zhang , and Zhong Lin Wang1,3 () 1 School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, USA 2 Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China 3 Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, China § Authors with equal contribution and order of authors determined by coin toss. Received: 13 February 2014 ABSTRACT Revised: 22 March 2014 Triboelectric nanogenerators (TENGs) have been demonstrated as an effective way Accepted: 27 March 2014 to harvest mechanical energy to drive small electronics. The density of triboelectric charges generated on contact surfaces between two distinct materials is a critical © Tsinghua University Press factor for dictating the output power. We demonstrate an approach to effectively and Springer-Verlag Berlin tune the triboelectric properties of materials by taking advantage of the dipole Heidelberg 2014 moment in polarized polyvinylidene fluoride (PVDF), leading to substantial enhancement of the output power density of the TENG. The output voltage KEYWORDS ranged from 72 V to 215 V under a constant contact force of 50 N. This work not triboelectric only provides a new method of enhancing output power of TENGs, but also nanogenerator,