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. 2016 Sep 13;9(1):6. doi: 10.1007/s40820-016-0105-5

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© The Author(s) 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.

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Fig. 8 — Comparisons of a CV, b galvanostatic charge–discharge curves, c complex-plane impedance plot, and d cycle life of VN/CNPs (scan rate = 10 mV s⁻¹, current density = 1 A g⁻¹, 2 M KOH aqueous solution)