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首页> 外文期刊>Advanced energy materials >A Total Organic Aqueous Redox Flow Battery Employing a Low Cost and Sustainable Methyl Viologen Anolyte and 4-HO-TEMPOCatholyte
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A Total Organic Aqueous Redox Flow Battery Employing a Low Cost and Sustainable Methyl Viologen Anolyte and 4-HO-TEMPOCatholyte

机译：含有低成本和可持续甲基Viologen阳极电极电解液和4-Ho-tempocatholyte的总有机氧化还原流量电池

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摘要

Increasing worldwide energy demands and rising CO2 emissions have motivated a search for new technologies to take advantage of renewables such as solar and wind energies. Redox flow batteries (RFBs) with their high power density, high energy efficiency, scalability (up to MW and MWh), and safety features are one suitable option for integrating such energy sources and overcoming their intermittency. However, resource limitation and high system costs of current RFB technologies impede wide implementation. Here, a total organic aqueous redox flow battery (OARFB) is reported, using low-cost and sustainable methyl viologen (MV, anolyte) and 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl (4-HO-TEMPO, catholyte), and benign NaCl supporting electrolyte. The electrochemical properties of the organic redox active materials are studied using cyclic voltammetry and rotating disk electrode voltammetry. The MV/4-HO-TEMPO ARFB has an exceptionally high cell voltage, 1.25 V. Prototypes of the organic ARFB can be operated at high current densities ranging from 20 to 100 mA cm(2), and deliver stable capacity for 100 cycles with nearly 100% Coulombic efficiency. The MV/4-HO-TEMPO ARFB displays attractive technical merits and thus represents a major advance in ARFBs.
机译：增加全球能源需求和上涨二氧化碳排放有动力寻找新技术，以利用太阳能和风能等可再生能源。氧化还原电池（RFB）具有高功率密度，高能量效率，可扩展性（最多MW和MWH），以及安全功能是整合这种能源并克服其间歇性的一种合适选择。然而，当前RFB技术的资源限制和高系统成本阻碍了广泛的实现。这里，使用低成本和可持续的甲基Viologen（MV，阳极电解液）和4-羟基-2,2,6,6-四甲基哌啶-1-氧基（4-HO）（4-Ho）报道总有机氧化还原流电池（OARFB）。（4-Ho -tempo，Coomololyte）和良性NaCl支持电解质。使用环状伏安法和旋转盘电极伏安来研究有机氧化还原活性材料的电化学性质。 MV / 4-HO-TEMPO ARFB具有极高的电池电压，有机ARFB的原型可以在20至100mA cm（2）的高电流密度下操作，并提供100个循环的稳定容量近100％的库仑效率。 MV / 4-HO-TEMPO ARFB显示有吸引力的技术优点，从而代表ARFBS的主要进展。

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