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    All-soluble all-iron aqueous redox-flow battery

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    Gong_2016.pdf (1.355Mb)
    Date
    2016-07
    Author
    Gong, Ke
    Xu, Fei
    Grunewald, Jonathan B.
    Ma, Xiaoya
    Zhao, Yun
    Gu, Shuang
    Yan, Yushan
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    Citation
    Ke Gong, Fei Xu, Jonathan B. Grunewald, Xiaoya Ma, Yun Zhao, Shuang Gu, and Yushan Yan. All-Soluble All-Iron Aqueous Redox-Flow Battery. ACS Energy Letters 2016 1 (1), 89-93
    Abstract
    The rapid growth of intermittent renewable energy (e.g., wind and solar) demands low-cost and large-scale energy storage systems for smooth and reliable power output, where redox-flow batteries (RFBs) could find their niche. In this work, we introduce the first all-soluble all-iron RFB based on iron as the same redox-active element but with different coordination chemistries in alkaline aqueous system. The adoption of the same redox-active element largely alleviates the challenging problem of cross-contamination of metal ions in RFBs that use two redox-active elements. An all-soluble all-iron RFB is constructed by combining an iron triethanolamine redox pair (i.e., [Fe(TEOA)OH](-)/[Fe(TEOA)(OH)](2-)) and an iron cyanide redox pair (i.e., Fe(CN)(6)(3-)/Fe(CN)(6)(4-)), creating 1.34 V of formal cell voltage. Good performance and stability have been demonstrated, after addressing some challenges, including the crossover of the ligand agent. As exemplified by the all-soluble all-iron flow battery, combining redox pairs of the same redox-active element with different coordination chemistries could extend the spectrum of RFBs.
    Description
    ACS AuthorChoice - This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
    URI
    http://dx.doi.org/10.1021/acsenergylett.6b00049
    http://hdl.handle.net/10057/12765
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