High-performance rechargeable aqueous Zn-ion batteries with a poly(benzoquinonyl sulfide) cathode†,Inorganic Chemistry Frontiers

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High-performance rechargeable aqueous Zn-ion batteries with a poly(benzoquinonyl sulfide) cathode†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2018-03-27 00:00:00 , DOI: 10.1039/c8qi00197a
Gulbahar Dawut _{1,

2,

3,

4,

5} , Yong Lu _{1,

2,

3,

4,

5} , Licheng Miao _{1,

2,

3,

4,

5} , Jun Chen _{1,

2,

3,

4,

5}

Affiliation

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.

中文翻译：

带有聚苯醌二硫醚阴极的高性能可再充电水性Zn离子电池†

我们报告了高性能的水性Zn离子电池，该电池由锌阳极，聚（苯醌二硫醚）（PBQS）阴极和3 M Zn（CF ₃ SO ₃）₂水性电解质组成。PBQS阴极在0.1C的初始放电容量为203 mA hg ^-1，在0.2C的50个循环后显示出良好的86％的容量保持率。PBQS阴极可在5.0C的高速率下提供126 mA hg ^-1的高可逆容量。同时，我们还通过异位红外光谱和理论计算研究了放电/充电过程中的氧化还原机理，揭示了Zn ^2+的可逆键合PBQS分子中的氧化还原反应中会发生PBQS中带有羰基氧原子的离子。PBQS分子的氧化还原反应可视为PBQS中Zn ²⁺离子与羰基氧原子的可逆键合。

更新日期：2018-03-27

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