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. 2018 May 25;8:8179. doi: 10.1038/s41598-018-26503-4

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© The Author(s) 2018

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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Electrochemical performance of hybrid supercapacitors based on LSG cathode and H-HTO anode in a full-cell system. (a) CV curves in the voltage of 0–2.8 V at a scan rate of 0.1 V/s and (b) initial charge-discharge curves in the voltage of 1.5–2.8 V at a current density of 0.5 A/g_{cathode+anode} (c) long-term cycling performance of hybrid supercapacitors at a current density of 3 A/g (the inset shows the rate capability at various current rates from 0.5 A/g to 5 A/g) (d) Nyquist curves for the frequency range from 10⁻¹ to 10⁵ Hz.