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. 2020 Aug 26;11:4277. doi: 10.1038/s41467-020-18086-4

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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. 4 — a 3D structural schematic of the rotary device. Insets 1 and 2 respectively depict the top-view schematics and device photographs of stator and rotator part. Scale bar: 1 cm. b Short-circuit charge (Q_sc), short-circuit current (I_sc) and open-circuit voltage (V_oc) of rotary CSA-S-TENG at 0.5 Hz working speed. c Transferred charge and current of rotary CSA-S-TENG at different rotational speed. d Matching impendence and output power evaluation of rotary CSA-S-TENG at 1 Hz working speed. e Voltage curves of charging 100 μF, 470 μF and 1 mF capacitor using rotary CSA-S-TENG at 1 Hz speed. f Directly driving 912 LEDs at 60 rpm. g Charging 22 μF capacitor while powering a scientific calculator at 110 rpm. h Charging 470 μF capacitor while powering a hydro-thermometer at 120 rpm.