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. 2020 Dec 3;11:6186. doi: 10.1038/s41467-020-20045-y

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — a Working mechanism of sliding AC-TENG. The b output charges, c charge density, d short current, and e current density of sliding AC-TENG (friction layer: PTFE) with different electrode length and sliding distances. f Working mechanism of sliding MDC-TENG. The g output charges, h charge density, i short-circuit current, and j current density of MDC-TENG (friction layer: PTFE) with different electrode length, sliding distances, and different numbers of MDC-TENG units.