Non-aqueous organic redox flow batteries (NORFBs) have emerged as a promising technology for renewable energy storage and conversion. High capacity and power density can be achieved by virtue of high solubility and high operating voltage of the organic anolytes and catholytes in organic media. However, the lack of anolyte materials with high redox potentials and their poor electrochemical stability retard the wider application of NORFBs. Here, we investigated an evolutionary design of a set of bipyridines and their analogues as anolytes and examined their performance in full flow batteries. Using combined techniques of repeated voltammetry, lower scan rate cyclic voltammetry, proton nuclear magnetic resonance, and density functional theory calculations, we could rapidly evaluate the redox potential, stability, and reversibility of these redox candidates. The promising candidates, 4-pyridylpyridinium bis(trifluoromethanesulfonyl)imide ( monoMebiPy ) and 4,4′-bipyridine ( 4...

中文翻译：

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扩展无金属阳极氧化物的氧化还原电势：迈向高能量密度氧化还原液流电池

非水有机氧化还原液流电池（NORFB）已成为可再生能源存储和转换的有前途的技术。高容量和功率密度可以借助于有机介质中有机阳极电解液和阴极电解液的高溶解度和高工作电压来实现。然而，缺乏具有高氧化还原电势的阳极电解液材料及其差的电化学稳定性阻碍了NORFB的广泛应用。在这里，我们研究了联吡啶及其类似物作为阳极电解液的进化设计，并研究了它们在全流量电池中的性能。使用重复伏安法，较低扫描速率循环伏安法，质子核磁共振和密度泛函理论计算的组合技术，我们可以快速评估氧化还原电势，稳定性，和这些氧化还原候选物的可逆性。有希望的候选物，双（三氟甲磺酰基）亚胺的4-吡啶基吡啶鎓（monoMebiPy）和4,4'-联吡啶（4 ...