Additives mechanism study of transfer process to vanadium battery electrolyte

In this paper, using vanadium pentoxide and sulfuric acid as raw materials, through chemical synthetic prepared electrolyte for vanadium battery.When the sulfuric acid which is supporting electrolyte is 2 mol/L, the electrochemical properties of different vanadium ion concentration of positive electrolyte were studied.When the vanadium ion is 1.5 mol/L and 3 mol/L, add ethanol and KHSO4 to positive electrolyte and then tested them by cyclic voltammetry.The experimental results show that when the support of sulfuric acid electrolyte concentration is 2 mol/L and without any additives, electroactive material V4+ is 2.5 mol/L, the electrochemical activity is best, the current density is maximum; when V4+ concentration is less than 2.5 mol/L, adding ethanol and KHSO4 is no effect to the electrochemical additives; when V4+ concentration is greater than 2.5 mol/L, alcohols which have complexing effect will decrease electrolyte electrochemical activity, and nonalcohols have little effect.