Redox flow battery
US-2015147620-A1 · May 28, 2015 · US
Redox flow battery electrode, and redox flow battery
US10727498B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10727498-B2 |
| Application number | US-201515538308-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 24, 2015 |
| Priority date | Dec 26, 2014 |
| Publication date | Jul 28, 2020 |
| Grant date | Jul 28, 2020 |
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Abstract
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A redox flow electrode according to one aspect of the present invention is a redox flow battery electrode disposed between an ion exchange membrane and a bipolar plate, wherein the electrode includes a conductive sheet containing carbon nanotubes having an average fiber diameter of 1 μm or less, and a porous sheet that is laminated to the conductive sheet and is formed from fibers having an average fiber diameter of greater than 1 μm.
First claim
Opening claim text (preview).
The invention claimed is: 1. A redox flow battery electrode having: a conductive sheet comprising carbon nanotubes with an average fiber diameter of 1 μm or less, and a porous sheet that is laminated to the conductive sheet and is formed from fibers with an average fiber diameter of greater than 1 μm, wherein at least one of the following conditions (i) or (ii) is satisfied: (i) the carbon nanotubes comprise first carbon nanotubes having an average fiber diameter of 100 to 1,000 nm, and second carbon nanotubes having an average fiber diameter of 30 nm or less, and a weight ratio of the first carbon nanotubes to the second carbon nanotubes is 70:30 to 90:10; or (ii) the fibers of the porous sheet are polyphenylene sulfide fibers having an average fiber diameter of greater than 1 μm. 2. The redox flow battery electrode according to claim 1 , wherein the condition (i) is satisfied. 3. The redox flow battery electrode according to claim 2 , wherein at least a portion of the second carbon nanotubes straddle two or more of the first carbon nanotubes. 4. The redox flow battery electrode according to claim 1 , wherein the porous sheet is formed from carbon fibers having an average fiber diameter of greater than 1 μm. 5. The redox flow battery electrode according to claim 1 , wherein the condition (ii) is satisfied. 6. The redox flow battery electrode according to claim 1 , wherein a thickness of the conductive sheet is 0.01 to 1 mm, and a thickness of the porous sheet is 0.05 to 1 mm. 7. The redox flow battery electrode according to claim 1 , wherein a thickness of the conductive sheet is 0.02 to 0.5 mm, and a thickness of the porous sheet is 0.08 to 0.3 mm. 8. The redox flow battery electrode according to claim 1 , wherein the conditions (i) and (ii) are satisfied. 9. A redox flow battery comprising the redox flow battery electrode according to claim 1 disposed between an ion exchange membrane and a bipolar plate. 10. The redox flow battery according to claim 9 , wherein comb-shaped grooves are formed on a surface of the bipolar plate facing the electrode.
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Classifications
as mixture · CPC title
Fuel cells · CPC title
layered · CPC title
- H01M4/96Primary
Carbon-based electrodes · CPC title
Collectors; Separators, e.g. bipolar separators; Interconnectors · CPC title
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- What does patent US10727498B2 cover?
- A redox flow electrode according to one aspect of the present invention is a redox flow battery electrode disposed between an ion exchange membrane and a bipolar plate, wherein the electrode includes a conductive sheet containing carbon nanotubes having an average fiber diameter of 1 μm or less, and a porous sheet that is laminated to the conductive sheet and is formed from fibers having an ave…
- Who is the assignee on this patent?
- Showa Denko Kk
- What technology area does this patent fall under?
- Primary CPC classification H01M4/96. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 28 2020 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).