TITANYL SULFATE HYDRATE POWDER, METHOD FOR PRODUCING TITANYL SULFATE HYDRATE POWDER, METHOD FOR PRODUCING AQUEOUS TITANYL SULFATE SOLUTION, METHOD OF PRODUCING ELECTROLYTE SOLUTION, AND METHOD FOR PRODUCING REDOX FLOW BATTERY

摘要

There is provided a titanyl sulfate hydrate powder comprising 25 to 40% by mass of titanium element in terms of TiO₂, 40 to 60% by mass of sulfur element in terms of H₂SO₄, and niobium element in such an amount that a molar ratio of niobium element to titanium element (Nb/Ti) is 0.00005 to 0.012, with a molar ratio of the sulfur element content to the titanium element content (S/Ti) being 1.1 to 1.5, and comprising crystalline titanyl sulfate dihydrate (TiOSO₄·2H₂O). Thus, the present invention can provide a titanyl sulfate hydrate powder with a high dissolution rate in water and a production method therefor, as well as a method for producing an aqueous titanyl sulfate solution, a method for producing an electrolyte and a method for producing a redox flow battery, using the titanyl sulfate hydrate powder.