Systematic selection of solvent mixtures for non-aqueous redox flow batteries – vanadium acetylacetonate as a model system

摘要: Abstract Employing solvent mixtures in the electrolyte of non-aqueous redox flow batteries can increase energy density and efficiency. In this paper, active species solubility, conductivity, reaction rates were examined systematically among a number binary ternary mixtures, consisting acetonitrile 5 polar aprotic co-solvents to identify with enhanced solubility rates. Although we used vanadium acetylacetonate as model, methodologies presented here are applicable when evaluating for other species. Our approach is distinctive that it elucidated trade-offs desirable properties necessary batteries. We found acetylacetonate–based battery, use an 84/16 vol% acetonitrile/1,3-dioxolane mixture resulted positive negative sides compared observed pure acetonitrile. This improvement rate no decrease promising system