Highly Soluble Imidazolium Ferrocene Bis(sulfonate) Salts for Redox Flow Battery Applications
Highly Soluble Imidazolium Ferrocene Bis(sulfonate) Salts for Redox Flow Battery Applications
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DOI：
10.1021/acs.inorgchem.1c01473
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发表时间：
2021-07-02
影响因子：
4.6
通讯作者：
Ziegler, Christopher J.
中科院分区：
文献类型：
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作者：
Schrage, Briana R.;Zhang, Baosen;Ziegler, Christopher J.
氧化还原液流电池（RFB）是采用基于溶液的氧化还原活性组分用于可扩展能量存储的可扩展装置。为了使能量密度最大化，需要合成新的高可溶性阴极电解液和阳极电解液并评估其电化学性能。为此，我们合成了一系列咪唑鎓二茂铁双（磺酸）盐作为用于RFB应用的高度可溶性阴极电解质。六个盐与不同的烷基链长度上的咪唑阳离子的合成，表征和电化学分析。虽然水溶性得到显著改善，但咪唑鎓阳离子的反应性和盐溶液在水中的粘度增加（其随着咪唑鎓链长度的增加而增加）限制了这些材料对RFB设计的适用性。
Redox flow batteries (RFBs) are scalable devices that employ solution-based redox active components for scalable energy storage. To maximize energy density, new highly soluble catholytes and anolytes need to be synthesized and evaluated for their electrochemical performance. To that end, we synthesized a series of imidazolium ferrocene bis(sulfonate) salts as highly soluble catholytes for RFB applications. Six salts with differing alkyl chain lengths on the imidazolium cation were synthesized, characterized, and electrochemically analyzed. While aqueous solubility was significantly improved, the reactivity of the imidazolium cation and the increased viscosities of the salt solutions in water (which increase with increasing imidazolium chain length) limit the applicability of these materials to RFB design.