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Issue 6, 2018
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High-performance rechargeable aqueous Zn-ion batteries with a poly(benzoquinonyl sulfide) cathode

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Abstract

We report high-performance aqueous Zn-ion batteries consisting of a zinc anode, a poly(benzoquinonyl sulfide) (PBQS) cathode, and a 3 M Zn(CF3SO3)2 aqueous electrolyte. The PBQS cathode displays an initial discharge capacity of 203 mA h g−1 at 0.1C and a good capacity retention of 86% after 50 cycles at 0.2C. The PBQS cathode can deliver a high reversible capacity of 126 mA h g−1 at a high rate of 5.0C. Meanwhile, we also studied the redox mechanism during discharge/charge processes by ex situ infrared spectra and theoretical calculations, revealing that reversible bonding of Zn2+ ions with carbonyl oxygen atoms in PBQS occurs in the redox reactions of PBQS molecules. The redox reactions of PBQS molecules can be regarded as the reversible bonding of Zn2+ ions with carbonyl oxygen atoms in PBQS.

Graphical abstract: High-performance rechargeable aqueous Zn-ion batteries with a poly(benzoquinonyl sulfide) cathode

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Publication details

The article was received on 04 Mar 2018, accepted on 26 Mar 2018 and first published on 27 Mar 2018


Article type: Research Article
DOI: 10.1039/C8QI00197A
Citation: Inorg. Chem. Front., 2018,5, 1391-1396
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    High-performance rechargeable aqueous Zn-ion batteries with a poly(benzoquinonyl sulfide) cathode

    G. Dawut, Y. Lu, L. Miao and J. Chen, Inorg. Chem. Front., 2018, 5, 1391
    DOI: 10.1039/C8QI00197A

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