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Improved Output Performance of Direct‐Current Triboelectric Nanogenerator through Field Enhancing Breakdown Effect
Author(s) -
Chen Shengyang,
Liu Di,
Zhou Linglin,
Li Shaoxin,
Zhao Zhihao,
Cui Shengnan,
Gao Yikui,
Li Yanhong,
Wang Zhong Lin,
Wang Jie
Publication year - 2021
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.202100195
Subject(s) - triboelectric effect , nanogenerator , materials science , current density , rectifier (neural networks) , optoelectronics , dielectric , electrical engineering , direct current , voltage , composite material , computer science , engineering , physics , stochastic neural network , quantum mechanics , machine learning , recurrent neural network , artificial neural network
The emerging direct‐current triboelectric nanogenerator (DC‐TENG) does not need to be rectified and is not restricted by a dielectric breakdown compared with an alternating current TENG (AC‐TENG). Furthermore, the charge density of the DC‐TENG reaches an ultrahigh level far beyond that of the AC‐TENG based on a rational design. However, there are always some electrons remaining on the surface of the dielectric after the breakdown process in the DC‐TENG, and therefore a low charge utilization is obtained. Herein, a simple and universal method is proposed through a double‐layer structure design, that is, a triboelectric layer as the friction layer and an electret layer charged through a surface treatment as the field‐enhancing layer to further improve the output performance of the DC‐TENG, which is inspired by the fable “The Crow and the Pitcher.” Owing to the external field‐enhancing breakdown effect, a double improvement in the breakdown efficiency and output charge density is obtained compared with a conventional DC‐TENG. Moreover, a nearly constant output current has been demonstrated for directly powering electronics without a rectifier. This study provides a universal method for optimizing the output performance of a DC‐TENG.