Redox flow batteries (RFBs) represent a promising technology for grid-scale integration of renewable energy. However, cross-contamination problems, encountered with distinct catholyte and anolyte, limit the development of reliable organic RFBs. Herein, we report the first use of a helical carbocation with three oxidation states, for the development of symmetric cells. Essential kinetic properties of this molecule were assessed by cyclic voltammetry. Its stability was then evaluated by mono- and bi-electronic cycling experiments, resulting in 550 and 80 cycles respectively, with high-capacity retention. This helical ion-based electrolyte achieved a proof-of-principle 2.12 V open circuit potential as an all-organic nonaqueous symmetric RFB.

中文翻译：

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基于螺旋碳鎓离子电解质的对称，鲁棒和高压有机氧化还原液流电池模型

氧化还原液流电池（RFB）代表了可再生能源并网规模化的有前途的技术。但是，不同的阴极电解液和阳极电解液遇到的交叉污染问题限制了可靠有机RFB的开发。在这里，我们报道了具有三个氧化态的螺旋碳正离子在对称细胞发展中的首次应用。通过循环伏安法评估该分子的基本动力学性质。然后通过单电子和双电子循环实验评估其稳定性，分别产生550和80个循环，并保持高容量。该螺旋离子基电解质作为全有机非水对称RFB达到了原理证明的2.12 V开路电势。