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. 2020 Oct 27;13:1. doi: 10.1007/s40820-020-00525-y

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© The Author(s) 2020

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — (a) CV curves of the NCS-5 anode at different scan rates in the voltage range of 0.01–3.0 V (vs. K⁺/K). (b) Derived relationship between peak current and scan rate in logarithmic format. (c) b-values plotted as a function of potential for the cathodic scan (K⁺ intercalation). (d) Separation of the capacitive and diffusion currents in the NCS-5 anode at a scan rate of 1.0 mV s⁻¹. (e) Normalized contributions of capacitance and diffusion at different scan rates. (f) Relationship between Z′ and ω^−1/2 in the low-frequency region