The present invention relates to a redox flow battery comprising: a positive compartment containing a positive electrode in contact with a first aqueous-based electrolyte solution comprising a positive electrolyte dissolved in a first aqueous-based solvent; a negative compartment containing a negative electrode in contact with a second aqueous-based electrolyte solution comprising a negative electrolyte being an organic redox-active molecule dissolved in a second aqueous-based solvent; means for establishing electrical conduction between said positive electrode and said negative electrode, and an external load for directing electrical energy into or out of the redox flow battery; a separator component that separates the first aqueous-based electrolyte solution in the positive compartment from the second aqueous-based electrolyte solution in the negative compartment and substantially prevents the positive electrolyte in the positive compartment and the negative electrolyte in the negative compartment from intermingling with each other, while permitting the passage of non-redox-active species between the electrolyte solutions in the positive and negative compartments; and means capable of establishing flow of the electrolyte solutions past said positive and negative electrodes, respectively, and wherein the organic redox-active molecule is a naphthalene diimide (NDI); and a modified NDI.
本发明涉及一种氧化还原流动电池,包括:一个正极间隔,其中含有与第一基于
水的电解质溶液接触的正极,该溶液包括溶解在第一基于
水的溶剂中的正电解质;一个负极间隔,其中含有与第二基于
水的电解质溶液接触的负极,该溶液包括溶解在第二基于
水的溶剂中的有机氧化还原活性分子作为负电解质;用于在正极和负极之间建立电传导的手段,以及用于将电能引导进入或离开氧化还原流动电池的外部负载;一种分隔组件,将正极间隔中的第一基于
水的电解质溶液与负极间隔中的第二基于
水的电解质溶液分离,并且实质上防止正极间隔中的正电解质和负极间隔中的负电解质相互混合,同时允许非氧化还原活性物种在正极和负极间的电解质溶液之间通行;以及能够建立电解质溶液在正极和负极电极之间流动的手段,其中所述的有机氧化还原活性分子是
萘二
酰亚胺(
NDI);以及一种改性的
NDI。