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Issue 13, 2019
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Reversible Zn-driven reduction displacement reaction in aqueous zinc-ion battery

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Abstract

Tremendous attention has been paid to aqueous zinc-ion batteries (ZIBs) with the merits of low cost, safety and environmental benignity. Exploration of the Zn2+ ion storage mechanism is of great significance to the fundamental understanding and future practical application of advanced aqueous Zn-ion battery systems. Herein, we have observed the reduction displacement reaction mechanism upon Zn2+ insertion/extraction into/from the structure of copper pyrovanadate (Cu3(OH)2V2O7·2H2O), i.e., Zn2+ insertion would drive the reduction of Cu2+ to metallic Cu0 particles, and also the phase transition from Cu3(OH)2V2O7·2H2O to a new phase of Zn0.25V2O5·H2O. As a result, Cu3(OH)2V2O7·2H2O is able to deliver excellent electrochemical performance (e.g., a high discharge capacity of 136 mA h g−1 can be maintained after 3000 repetitive cycles at 10 A g−1).

Graphical abstract: Reversible Zn-driven reduction displacement reaction in aqueous zinc-ion battery

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Publication details

The article was received on 04 Jan 2019, accepted on 04 Mar 2019 and first published on 05 Mar 2019


Article type: Communication
DOI: 10.1039/C9TA00125E
J. Mater. Chem. A, 2019,7, 7355-7359

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    Reversible Zn-driven reduction displacement reaction in aqueous zinc-ion battery

    L. Shan, J. Zhou, M. Han, G. Fang, X. Cao, X. Wu and S. Liang, J. Mater. Chem. A, 2019, 7, 7355
    DOI: 10.1039/C9TA00125E

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