Boosting output performance of sliding mode triboelectric nanogenerator by charge space-accumulation effect

Wencong He, Wenlin Liu, Jie Chen, Zhao Wang, Yike Liu, Xianjie Pu, Hongmei Yang, Qian Tang, Huake Yang, Hengyu Guo () and Chenguo Hu ()
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Wencong He: Chongqing University
Wenlin Liu: Chongqing University
Jie Chen: Chongqing University
Zhao Wang: Chongqing University
Yike Liu: Chongqing University
Xianjie Pu: Chongqing University
Hongmei Yang: Chongqing University
Qian Tang: Chongqing University
Huake Yang: Chongqing University
Hengyu Guo: Chongqing University
Chenguo Hu: Chongqing University

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

Abstract: Abstract The sliding mode triboelectric nanogenerator (S-TENG) is an effective technology for in-plane low-frequency mechanical energy harvesting. However, as surface modification of tribo-materials and charge excitation strategies are not well applicable for this mode, output performance promotion of S-TENG has no breakthrough recently. Herein, we propose a new strategy by designing shielding layer and alternative blank-tribo-area enabled charge space-accumulation (CSA) for enormously improving the charge density of S-TENG. It is found that the shielding layer prevents the air breakdown on the interface of tribo-layers effectively and the blank-tribo-area with charge dissipation on its surface of tribo-material promotes charge accumulation. The charge space-accumulation mechanism is analyzed theoretically and verified by experiments. The charge density of CSA-S-TENG achieves a 2.3 fold enhancement (1.63 mC m−2) of normal S-TENG in ambient conditions. This work provides a deep understanding of the working mechanism of S-TENG and an effective strategy for promoting its output performance.

Date: 2020
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DOI: 10.1038/s41467-020-18086-4

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