ELECTROLYTE REGENERATING METHOD FOR VANADIUM REDOX BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a method for regenerating an electrolyte so as to be capable of performing efficient operation by reducing generation of gas, and an operation method of a redox flow battery using this regenerating method. SOLUTION: This electrolyte regenerating method for a redox battery changes ions to pentavalent vanadium ions from tetravalent vanadium ions at charging time, and causes reverse reaction at discharging time in a positive electrode, and changes the ions to bivalent vanadium ions from trivalent vanadium ions at charging time, and causes reverse reaction at discharging time in a negative electrode. The electrolyte is regenerated so that a valence number balance becomes 3.41 valence to 3.60 valence by measuring a variation from an initial adjusting valence number of a vanadium ion valence number in the preadjusted electrolyte.