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High-Performance Rechargeable Aqueous Zn-Ion Batteries with Poly(Benzoquinonyl Sulfide) Cathode

Abstract

We report high-performance aqueous Zn-ion batteries consisting of zinc anode, poly(benzoquinonyl sulfide) (PBQS) cathode, and 3M Zn(CF3SO3)2 aqueous electrolyte. The PBQS cathode displays an initial discharge capacity of 203 mA h g-1 at 0.1 C and a good capacity retention of 86 % after 50 cycles at 0.2 C. The PBQS cathode can deliver a high reversible capacity of 126 mA h g-1 at a high rate of 5.0 C. 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 is taking in the redox reactions of PBQS molecules. the redox reactions of PBQS molecules can be regarded as reversible bonding of Zn2+ ions with carbonyl oxygen atoms in PBQS.

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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, Accepted Manuscript
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    High-Performance Rechargeable Aqueous Zn-Ion Batteries with Poly(Benzoquinonyl Sulfide) Cathode

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

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