Redox flow battery

Patent metadata

Field	Value
Publication number	US-9972858-B2
Application number	US-201414773112-A
Country	US
Kind code	B2
Filing date	Aug 4, 2014
Priority date	Aug 7, 2013
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

Provided is a redox flow battery that can suppress generation of a precipitation on a positive electrode. The redox flow battery performs charging and discharging by supplying a positive electrode electrolyte and a negative electrode electrolyte to a battery cell that includes a positive electrode, a negative electrode, and a separating membrane interposed between the two electrodes. The positive electrode electrolyte contains a manganese ion and an additional metal ion, the negative electrode electrolyte contains at least one metal ion selected from a titanium ion, a vanadium ion, a chromium ion, and a zinc ion, and the additional metal ion contained in the positive electrode electrolyte is at least one of an aluminum ion, a cadmium ion, an indium ion, a tin ion, an antimony ion, an iridium ion, a gold ion, a lead ion, a bismuth ion, and a magnesium ion.

First claim

The invention claimed is:

1. A redox flow battery that performs charging and discharging by supplying a positive electrode electrolyte and a negative electrode electrolyte to a battery cell that includes a positive electrode, a negative electrode, and a separating membrane interposed between the two electrodes,
wherein the positive electrode electrolyte contains a manganese ion and an additional metal ion,
the negative electrode electrolyte contains at least one metal ion selected from a titanium ion, a vanadium ion, a chromium ion, and a zinc ion,
the additional metal ion contained in the positive electrode electrolyte is at least one of an aluminum ion, a cadmium ion, an indium ion, a tin ion, an antimony ion, an iridium ion, a gold ion, a lead ion, a bismuth ion, and a magnesium ion, and
a total concentration of the additional metal ion in the positive electrode electrolyte is 0.001 M or more and 1 M or less.

2. The redox flow battery according to claim 1 ,
wherein the negative electrode electrolyte further contains an additional metal ion, and
the additional metal ion contained in the negative electrode electrolyte is at least one of an aluminum ion, a cadmium ion, an indium ion, a tin ion, an antimony ion, an iridium ion, a gold ion, a lead ion, a bismuth ion, and a magnesium ion.

3. The redox flow battery according to claim 1 , wherein the positive electrode electrolyte contains a titanium ion.

4. The redox flow battery according to claim 3 , wherein a concentration of the titanium ion contained in the positive electrode electrolyte is 5 M or less.

5. The redox flow battery according to claim 1 , wherein the negative electrode electrolyte contains a manganese ion.

6. The redox flow battery according to claim 5 , wherein a concentration of the manganese ion contained in the negative electrode electrolyte is 0.3 M or more and 5 M or less.

7. The redox flow battery according to claim 1 , wherein at least one of a concentration of the manganese ion contained in the positive electrode electrolyte and a concentration of the metal ion contained in the negative electrode electrolyte is 0.3 M or more and 5 M or less.

8. The redox flow battery according to claim 1 , wherein the negative electrode electrolyte contains a titanium ion, and at least one of a concentration of the manganese ion contained in the positive electrode electrolyte and a concentration of the titanium ion contained in the negative electrode electrolyte is 0.3 M or more and 5 M or less.

9. The redox flow battery according to claim 1 , wherein the additional metal ion contained in at least one of the positive electrode electrolyte and the negative electrode electrolyte or the additional metal ion contained in the negative electrode electrolyte satisfies at least one of (1) to (10) below:
(1) the aluminum ion is at least one of a monovalent aluminum ion, a divalent aluminum ion, and a trivalent aluminum ion;
(2) the cadmium ion is at least one of a monovalent cadmium ion and a divalent cadmium ion;
(3) the indium ion is at least one of a monovalent indium ion, a divalent indium ion, and a trivalent indium ion;
(4) the tin ion is at least one of a divalent tin ion and a tetravalent tin ion;
(5) the antimony ion is at least one of a trivalent antimony ion and a pentavalent antimony ion;
(6) the iridium ion is at least one of a monovalent iridium ion, a divalent iridium ion, a trivalent iridium ion, a tetravalent iridium ion, a pentavalent iridium ion, and a hexavalent iridium ion;
(7) the gold ion is at least one of a monovalent gold ion, a divalent gold ion, a trivalent gold ion, a tetravalent gold ion, and a pentavalent gold ion;
(8) the lead ion is at least one of a divalent lead ion and a tetravalent lead ion;
(9) the bismuth ion is at least one of a trivalent bismuth ion and a pentavalent bismuth ion;
(10) the magnesium ion is at least one of a monovalent magnesium ion and a divalent magnesium ion.

10. The redox flow battery according to claim 1 , wherein the manganese ion is at least one of a divalent manganese ion and a trivalent manganese ion, at least one of the positive electrode electrolyte and the negative electrode electrolyte contains a titanium ion, and the titanium ion is at least one of a trivalent titanium ion and a tetravalent titanium ion.

Assignees

• Sumitomo Electric Industries

Inventors

• Dong Yongrong
• Kaku Hirokazu
• Hanafusa Kei
• Sekine Ryojun

Classifications

• H01M8/20

  Indirect fuel cells, e.g. fuel cells with redox couple being irreversible (H01M8/18 takes precedence) · CPC title

• H01M8/188 Primary

  by recharging of redox couples containing fluids; Redox flow type batteries · CPC title

• H01M2300/0011

  Sulfuric acid-based · CPC title

• Y02E60/50

  Fuel cells · CPC title

• Y02E60/528

  Cross-Sectional Technologies · mapped topic