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. 2022 Sep 9;13:5316. doi: 10.1038/s41467-022-33086-2

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© The Author(s) 2022

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. 5 — a Open-circuit voltage generated by 10 L-L TENGs connected in series. b Charging curves for commercial capacitors of 47 μF, 100 μF, and 330 μF. c, d The series of L-L TENGs could directly light an LED. The (e) electronic meter and (f) hygrometer could be powered by the series of L-L TENGs. g Charging curves for commercial capacitors of 47 μF, 100 μF, and 330 μF using L-L TENG and S-S TENG and (h) charging curve for supercapacitor of 0.1 F using L-L TENG.