期刊
INORGANIC CHEMISTRY FRONTIERS
卷 5, 期 6, 页码 1391-1396出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8qi00197a
关键词
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资金
- NSFC [21673243]
- MOST [2017YFA0206700]
- MOE 111 [B12015]
- Tianjin Key [16PTSYJC00030]
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.
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