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Issue 11, 2018
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Li+ intercalated V2O5·nH2O with enlarged layer spacing and fast ion diffusion as an aqueous zinc-ion battery cathode

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Abstract

Aqueous zinc-ion batteries (ZIBs) show conspicuous potential in large-scale energy storage systems due to their cost-effectiveness and environmentally friendliness. Yet developmental cathodes in aqueous ZIBs suffer from sluggish Zn2+ diffusion kinetics. Herein, we introduce an effective strategy by the chemical intercalation of Li+ into the interlayer of V2O5·nH2O, i.e. LixV2O5·nH2O (LVO), with enlarged layer spacing and fast Zn2+ diffusion. As a cathode in aqueous ZIBs with a 2 M ZnSO4 electrolyte, the cotton-like LVO-250 demonstrates high rate capacities and excellent cycling performance (232 mA h g−1 after 500 cycles at 5 A g−1, and 192 mA h g−1 after 1000 cycles at 10 A g−1). The electrochemical reaction kinetics and zinc storage mechanism are investigated in detail.

Graphical abstract: Li+ intercalated V2O5·nH2O with enlarged layer spacing and fast ion diffusion as an aqueous zinc-ion battery cathode

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Publication details

The article was received on 07 Jun 2018, accepted on 28 Aug 2018 and first published on 28 Aug 2018


Article type: Communication
DOI: 10.1039/C8EE01651H
Citation: Energy Environ. Sci., 2018,11, 3157-3162
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    Li+ intercalated V2O5·nH2O with enlarged layer spacing and fast ion diffusion as an aqueous zinc-ion battery cathode

    Y. Yang, Y. Tang, G. Fang, L. Shan, J. Guo, W. Zhang, C. Wang, L. Wang, J. Zhou and S. Liang, Energy Environ. Sci., 2018, 11, 3157
    DOI: 10.1039/C8EE01651H

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