Sumitomo Electric Industries, Limited

Tayca Corporation

Ryouta Tatsumi

Hirokazu Kaku

Tatsuya Tsurumura

Yongrong Dong

Atsuo Ikeuchi

Jun Fukuda

A redox flow battery includes a tank configured to store an electrolyte and a distribution mechanism to distribute the electrolyte to a battery cell. The tank has a partition portion partitioning a space inside the tank into a first space and a second space, the distribution mechanism has a distribution passage through which the electrolyte is distributed between the first space and the second space via the battery cell, and the partition portion is composed of a flexible material.

Redox flow battery

There is provided a titanyl sulfate hydrate powder comprising 25 to 40% by mass of titanium element in terms of TiO, 40 to 60% by mass of sulfur element in terms of HSO, 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 (TiOSO&#xb7;2HO). 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.

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

A raw material of an electrolyte solution that is to be dissolved in a solvent to form an electrolyte solution, and the raw material of an electrolyte solution is a raw material of an electrolyte solution that is a solid or semisolid that contains Ti in an amount of 2 mass % to 83 mass % inclusive, Mn in an amount of 3 mass % to 86 mass % inclusive, and S in an amount of 6 mass % to 91 mass % inclusive.

Raw material of electrolyte solution, method for manufacturing electrolyte solution and method for manufacturing redox flow battery

A redox flow battery includes a battery cell including a positive electrode, a negative electrode, and a membrane disposed between these two electrodes; a positive electrode electrolyte supplied to the positive electrode; and a negative electrode electrolyte supplied to the negative electrode, wherein the positive electrode electrolyte contains manganese ions and a phosphorus-containing substance, the negative electrode electrolyte contains at least one species of metal ions selected from titanium ions, vanadium ions, chromium ions, and zinc ions, and a concentration of the phosphorus-containing substance is 0.001 M or more and 1 M or less.

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Osaka, Japan

Ryouta Tatsumi