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. 2017 Aug 15;7:8260. doi: 10.1038/s41598-017-09039-x

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© The Author(s) 2017

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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Extraction of capacitive elements. Deconvolution of the total capacitance into surface capacitive (shaded part) and insertion (solid part) elements for the planar MnO₂ electrode at scan rates of (a) 20 mV s⁻¹ and (b) 200 mV s⁻¹, and for the 5Lyr nanostructured MnO₂ electrode at scan rates of (d) 20 mV s⁻¹ and (e) 200 mV s⁻¹. The bar graphs represent the specific capacitance of each of the two elements for the (c) planar and (f) 5Lyr nanostructured MnO₂ electrodes at various scan rates.