Quantifying contact status and the air-breakdown model of charge-excitation triboelectric nanogenerators to maximize charge density

Yike Liu, Wenlin Liu (), Zhao Wang, Wencong He, Qian Tang, Yi Xi, Xue Wang, Hengyu Guo () and Chenguo Hu ()
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Yike Liu: Chongqing University
Wenlin Liu: Chongqing University
Zhao Wang: Chongqing University
Wencong He: Chongqing University
Qian Tang: Chongqing University
Yi Xi: Chongqing University
Xue Wang: Chongqing University
Hengyu Guo: Chongqing University
Chenguo Hu: Chongqing University

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Surface charge density is the key factor for developing high performance triboelectric nanogenerators (TENG). The previously invented charge excitation TENG provides a most efficient way to achieve maximum charge output of a TENG device. Herein, criteria to quantitatively evaluate the contact efficiency and air breakdown model on charge excitation TENG are established to enhance and evaluate charge density. The theoretical results are further verified by systematic experiments. A high average charge density up to 2.38 mC m−2 is achieved using the 4 μm PEI film and homemade carbon/silicone gel electrode in ambient atmosphere with 5% relative humidity. This work also reveals the actual charge density (over 4.0 mC m−2) in a TENG electrode based on quantified surface micro-contact efficiency and provides a prospective technical approach to improve the charge density, which could push the output performance of TENG to a new horizon.

Date: 2020
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DOI: 10.1038/s41467-020-15368-9

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