Standardized measurement of dielectric materials’ intrinsic triboelectric charge density through the suppression of air breakdown

Di Liu, Linglin Zhou, Shengnan Cui, Yikui Gao, Shaoxin Li, Zhihao Zhao, Zhiying Yi, Haiyang Zou, Youjun Fan, Jie Wang () and Zhong Lin Wang ()
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Di Liu: Chinese Academy of Sciences
Linglin Zhou: Chinese Academy of Sciences
Shengnan Cui: Chinese Academy of Sciences
Yikui Gao: Chinese Academy of Sciences
Shaoxin Li: Chinese Academy of Sciences
Zhihao Zhao: Chinese Academy of Sciences
Zhiying Yi: Chinese Academy of Sciences
Haiyang Zou: Georgia Institute of Technology
Youjun Fan: Tsinghua University
Jie Wang: Chinese Academy of Sciences
Zhong Lin Wang: Chinese Academy of Sciences

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Triboelectric charge density and energy density are two crucial factors to assess the output capability of dielectric materials in a triboelectric nanogenerator (TENG). However, they are commonly limited by the breakdown effect, structural parameters, and environmental factors, failing to reflect the intrinsic triboelectric behavior of these materials. Moreover, a standardized strategy for quantifying their maximum values is needed. Here, by circumventing these limitations, we propose a standardized strategy employing a contact-separation TENG for assessing a dielectric material’s maximum triboelectric charge and energy densities based on both theoretical analyses and experimental results. We find that a material’s vacuum triboelectric charge density can be far higher than previously reported values, reaching a record-high of 1250 µC m−2 between polyvinyl chloride and copper. More importantly, the obtained values for a dielectric material through this method represent its intrinsic properties and correlates with its work function. This study provides a fundamental methodology for quantifying the triboelectric capability of dielectric materials and further highlights TENG’s promising applications for energy harvesting.

Date: 2022
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DOI: 10.1038/s41467-022-33766-z

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