MODIFIED VANADIUM COMPOUND, PRODUCING METHOD THEREOF, REDOX FLOW BATTERY ELECTROLYTE COMPOSITE AND REDOX FLOW BATTERY ELECTROLYTE PRODUCING METHOD

摘要

A modified vanadium compound of the present invention in such that vanadium sulfate (III) or a mixed vanadium compound of vanadium sulfate (III) and vanadyl sulfate (IV) contains excessive sulfuric acid other than sulfate group composing the vanadium sulfate (III) or the vanadyl sulfate (IV), and when the modified vanadium compound is used, a redox flow battery electrolyte can be prepared easily.