Investigation of Alkyl Amine Substituted Quinone Derivatives for the Redox Flow Battery Applications in Acidic Medium
作者:Jagadeeswari Sivanadanam、Raja Murugan、Harun Khan、Indrapal Singh Aidhen、Kothandaraman Ramanujam
DOI:10.1149/1945-7111/ac505f
日期:2022.2.1
appreciable change in colour. The battery delivered a discharge capacity of ∼ 2 Ah L−1, which faded with cycles. We have carried out a post cycle analysis of catholyte and anolyte to understand the origin of the capacity fading. Towards this, the oxidized form of H2QDMA, i.e., QDMA, was synthesized. The stability of QDMA in acidic solution was low, and the colour of the solution changed to intense brown
2,5-双((二甲基氨基)甲基)苯-1,4-二醇(H 2 QDMA),一种氧化还原活性分子及其衍生物,采用曼尼希反应一步化学法合成,已探索作为阴极电解液用于水性氧化还原液流电池应用的钒 (V 2+ /V 3+ ) 阳极电解液。H 2 QDMA 在 3 MH 2 SO 4中的溶解度为~0.75 M。H 2 QDMA 在形式电位 0.6 V ± vs Ag/AgCl 处显示出一个尖锐的氧化还原峰,并且它在 100 个连续的 CV 循环中保持稳定,颜色没有任何明显变化。电池的放电容量为 ∼ 2 Ah L −1, 随着周期而褪色。我们对阴极电解液和阳极电解液进行了循环后分析,以了解容量衰减的根源。为此,合成了 H 2 QDMA的氧化形式,即 QDMA。QDMA在酸性溶液中稳定性低,溶液颜色随时间变为深棕色。QDMA 的紫外-可见光谱和 CV 曲线反映了与在恒电流充放电分析后获得的阴极电解液溶液中观