Characterisation of the ferrocene/ferrocenium ion redox couple as a model chemistry for non-aqueous redox flow battery research
Characterisation of the ferrocene/ferrocenium ion redox couple as a model chemistry for non-aqueous redox flow battery research
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DOI：
10.1016/j.jelechem.2020.114241
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发表时间：
2020-09-01
影响因子：
4.5
通讯作者：
Toghill, Kathryn E.
中科院分区：
文献类型：
--
作者：
Armstrong, Craig G.;Hogue, Ross W.;Toghill, Kathryn E.
研究了简单二茂铁/二茂铁离子（Fc/FcBF(4)）氧化还原偶对作为非水氧化还原液流电池的模型化学。利用伏安法、液流电池循环和UV-vis光谱对其性能进行了全面表征，以验证液流电池的性能。尽管Fc在乙腈中的溶解度仅为0.16 M，但Fc/FcBF(4)氧化还原偶对仍是一种有用的低成本化学模型。通过使用“单氧化还原对循环”，其中只有Fc/FcBF(4)氧化还原对进行电池循环，证明了Fc在10 mM浓度下的高容量保留；200个周期（7.8天）后容量保持80%。研究人员对容量损失的机制进行了研究，并诊断为通过电解质中的FcBF(4)分解发生的，该分解与电池循环无关。
The simple ferrocene/ferrocenium ion (Fc/FcBF(4)) redox couple was examined as a model chemistry for non-aqueous redox flow battery research. Its properties were fully characterised using voltammetry, flow-cell battery cycling, and UV-vis spectroscopy to validate flow-cell performance. Fc demonstrates facile kinetics and high stability of its oxidation states, making the Fc/FcBF(4) redox couple a useful low-cost model chemistry, despite its limited 0.16 M solubility in acetonitrile. By use of 'single redox couple cycling', in which only the Fc/FcBF(4) redox couple is battery cycled, the high capacity retention of Fc at 10 mM concentration was demonstrated; 80% capacity retention after 200 cycles (7.8 days). The mechanism for the capacity loss was investigated and diagnosed to occur via FcBF(4) decomposition in the electrolyte, which proceeds irrespective of battery cycling.