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. 2019 Feb 1;10:536. doi: 10.1038/s41467-019-08320-z

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© The Author(s) 2019

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 — Stretchable properties of a broken/healed supercapacitor. a Digital photographs of a broken/healed supercapacitor being stretched from 0 to 1000%. b, c Galvanostatic charge/discharge (GCD) curves of a broken supercapacitor healed by infrared light for 10 min (b) and heating treatment at 80 °C for 60 min (c) as they were stretched from 0 to 900%. d Specific capacitance retention of the broken and healed supercapacitors calculated from the results of b and c. e Digital photographs of four supercapacitors connected in series to power a light-emitting diode (LED), in which one device was broken/healed and then stretched to a strain of 800%