title: An ultrarobust high-performance triboelectric nanogenerator based on charge replenishment.
abstract: Harvesting ambient mechanical energy is a green route in obtaining clean and sustainable electric energy. Here, we report an ultrarobust high-performance triboelectric nanogenerator (TENG) on the basis of charge replenishment by creatively introducing a rod rolling friction in the structure design. With a grating number of 30 and a free-standing gap of 0.5 mm, the fabricated TENG can deliver an output power of 250 mW/m(2) at a rotating rate of 1000 r/min. And it is capable of charging a 200 μF commercial capacitor to 120 V in 170 s, lighting up a G16 globe light as well as 16 spot lights connected in parallel. Moreover, the reported TENG holds an unprecedented robustness in harvesting rotational kinetic energy. After a continuous rotation of more than 14.4 million cycles, there is no observable electric output degradation. Given the superior output performance together with the unprecedented device robustness resulting from distinctive mechanism and novel structure design, the reported TENG renders an effective and sustainable technology for ambient mechanical energy harvesting. This work is a solid step in the development toward TENG-based self-sustained electronics and systems.
authors.affiliation: †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.|‡Department of Applied Physics, Chongqing University, Chongqing 400044, China.
authors.forename: Hengyu
authors.initials: H
authors.lastname: Guo
authors.affiliation: †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.affiliation: †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.
authors.forename: Min-Hsin
authors.initials: MH
authors.lastname: Yeh
authors.affiliation: †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.
authors.forename: Xing
authors.initials: X
authors.lastname: Fan
authors.affiliation: †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Wen
authors.affiliation: †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.
authors.forename: Zhaoling
authors.initials: Z
authors.lastname: Li
authors.affiliation: ‡Department of Applied Physics, Chongqing University, Chongqing 400044, China.
authors.forename: Chenguo
authors.initials: C
authors.lastname: Hu
authors.affiliation: †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.|§Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang
keywords: charge replenishment; rolling friction; ultrarobustness