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Electrolyte for redox flow battery and redox flow battery
US9391340B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9391340-B2 |
| Application number | US-201314422785-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 7, 2013 |
| Priority date | Jun 21, 2013 |
| Publication date | Jul 12, 2016 |
| Grant date | Jul 12, 2016 |
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Abstract
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Provided are an electrolyte for a redox flow battery, the electrolyte allowing suppression of generation of hydrogen during a battery reaction; and a redox flow battery including the electrolyte. In the electrolyte for a redox flow battery, the total concentration of platinum-group element ions is 4.5 mass ppm or less. The platinum-group element ions may satisfy in terms of concentration at least one of those described below: the concentration of rhodium ions is 1 mass ppm or less, the concentration of palladium ions is 1 mass ppm or less, the concentration of iridium ions is 1 mass ppm or less, and the concentration of platinum ions is 1 mass ppm or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. An electrolyte for a redox flow battery, comprising vanadium ions as an active material, wherein a total concentration of platinum-group element ions is greater than 0 mass ppm and is 4.5 mass ppm or less. 2. The electrolyte for a redox flow battery according to claim 1 , wherein the platinum-group element ions satisfy at least one of (1) to (3) below in terms of concentration: (1) a concentration of rhodium ions is 1 mass ppm or less, (2) a concentration of palladium ions is 1 mass ppm or less, and (3) a concentration of iridium ions is 1 mass ppm or less. 3. The electrolyte for a redox flow battery according to claim 1 , wherein the platinum-group element ions satisfy (4) below in terms of concentration: (4) a concentration of platinum ions is 1 mass ppm or less. 4. The electrolyte for a redox flow battery according to claim 1 , wherein a concentration of the vanadium ions is 1 mol/L or more and 3 mol/L or less, a concentration of free sulfuric acid is 1 mol/L or more and 4 mol/L or less, a concentration of phosphoric acid is 1.0×10 −4 mol/L or more and 7.1×10 −1 mol/L or less, a concentration of ammonium is 20 mass ppm or less, and a concentration of silicon is 40 mass ppm or less. 5. A redox flow battery comprising the electrolyte for a redox flow battery according to claim 1 . 6. An electrolyte for a redox flow battery, comprising: vanadium ions as an active material; and platinum-group element ions; wherein a total concentration of platinum-group element ions is no greater than 4.5 mass ppm. 7. The electrolyte for a redox flow battery according to claim 6 , wherein the platinum-group element ions satisfy at least one of (1) to (3) below in terms of concentration: (1) a concentration of rhodium ions is no greater than 1 mass ppm, (2) a concentration of palladium ions is no greater than 1 mass ppm, and (3) a concentration of iridium ions is no greater than 1 mass ppm. 8. The electrolyte for a redox flow battery according to claim 6 , wherein the platinum-group element ions satisfy (4) below in terms of concentration: (4) a concentration of platinum ions is no greater than 1 mass ppm. 9. The electrolyte for a redox flow battery according to claim 6 , wherein a concentration of the vanadium ions is 1 mol/L or more and 3 mol/L or less, a concentration of free sulfuric acid is 1 mol/L or more and 4 mol/L or less, a concentration of phosphoric acid is 1.0×10 −4 mol/L or more and 7.1×10 −1 mol/L or less, a concentration of ammonium is 20 mass ppm or less, and a concentration of silicon is 40 mass ppm or less. 10. A redox flow battery comprising the electrolyte for a redox flow battery according to claim 6 .
Assignees
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Classifications
Fuel cells · CPC title
Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells · CPC title
- H01M8/20Primary
Indirect fuel cells, e.g. fuel cells with redox couple being irreversible (H01M8/18 takes precedence) · CPC title
- H01M8/188Primary
by recharging of redox couples containing fluids; Redox flow type batteries · CPC title
Cross-Sectional Technologies · mapped topic
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- What does patent US9391340B2 cover?
- Provided are an electrolyte for a redox flow battery, the electrolyte allowing suppression of generation of hydrogen during a battery reaction; and a redox flow battery including the electrolyte. In the electrolyte for a redox flow battery, the total concentration of platinum-group element ions is 4.5 mass ppm or less. The platinum-group element ions may satisfy in terms of concentration at lea…
- Who is the assignee on this patent?
- Sumitomo Electric Industries
- What technology area does this patent fall under?
- Primary CPC classification H01M8/20. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 12 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).