Composite membrane for polymer electrolyte membrane fuel cell
US-2015364771-A1 · Dec 17, 2015 · US
Antioxidant for electrolyte membrane of fuel cell and method for preparing the same
US11695147B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11695147-B2 |
| Application number | US-202017013918-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 8, 2020 |
| Priority date | Jul 15, 2020 |
| Publication date | Jul 4, 2023 |
| Grant date | Jul 4, 2023 |
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Abstract
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Disclosed is an antioxidant for a polymer electrolyte membrane of a fuel cell including cerium hydrogen phosphate (CeHPO4). The presence of cerium hydrogen phosphate in the antioxidant enhances the dissolution stability of cerium and improves the ability to capture water, leading to an increase in proton conductivity. In addition, the cerium hydrogen phosphate has a crystal structure composed of smaller cerium particles. This crystal structure greatly improves the ability of the antioxidant to prevent oxidation of the electrolyte membrane. Also disclosed are an electrolyte membrane including the antioxidant, a fuel cell including the electrolyte membrane, a method for preparing the antioxidant, a method for producing the electrolyte membrane, and a method for fabricating the fuel cell.
First claim
Opening claim text (preview).
What is claimed is: 1. An antioxidant for a polymer electrolyte membrane of a fuel cell, the antioxidant comprising cerium hydrogen phosphate (CeHPO 4 ). 2. The antioxidant according to claim 1 , wherein the antioxidant is a radical scavenger. 3. The antioxidant according to claim 1 , wherein the cerium hydrogen phosphate (CeHPO 4 ) is a solid acid. 4. The antioxidant according to claim 3 , wherein the cerium hydrogen phosphate (CeHPO 4 ) forms cerium hydrogen phosphate (CeHPO 4 ) nanofibers. 5. The antioxidant according to claim 4 , wherein the nanofibers have a diameter of 10 to 900 nm. 6. The antioxidant according to claim 1 , wherein the antioxidant is used for a fluorinated polymer electrolyte membrane. 7. The antioxidant according to claim 6 , wherein the fluorinated polymer electrolyte membrane is a perfluorosulfonated ionomer electrolyte membrane. 8. A polymer electrolyte membrane for a fuel cell comprising a polymer electrolyte membrane and an antioxidant comprising cerium hydrogen phosphate (CeHPO 4 ) dispersed in the polymer electrolyte membrane. 9. The polymer electrolyte membrane according to claim 8 , wherein the antioxidant is a radical scavenger. 10. The polymer electrolyte membrane according to claim 8 , wherein the cerium hydrogen phosphate (CeHPO 4 ) is a solid acid. 11. The antioxidant according to claim 8 , wherein the cerium hydrogen phosphate (CeHPO 4 ) forms cerium hydrogen phosphate (CeHPO 4 ) nanofibers. 12. The polymer electrolyte membrane according to claim 11 , wherein the nanofibers have a diameter of 10 to 900 nm. 13. A polymer electrolyte fuel cell comprising the polymer electrolyte membrane according to claim 8 .
Assignees
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Classifications
Nanostructured additives · CPC title
Phosphorus-containing compounds · CPC title
Organic polymers · CPC title
Phosphates of heavy metals · CPC title
Monomers containing fluorine not covered by the groups C08F14/20 - C08F14/28 · CPC title
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- What does patent US11695147B2 cover?
- Disclosed is an antioxidant for a polymer electrolyte membrane of a fuel cell including cerium hydrogen phosphate (CeHPO4). The presence of cerium hydrogen phosphate in the antioxidant enhances the dissolution stability of cerium and improves the ability to capture water, leading to an increase in proton conductivity. In addition, the cerium hydrogen phosphate has a crystal structure composed o…
- Who is the assignee on this patent?
- Korea Inst Sci & Tech
- What technology area does this patent fall under?
- Primary CPC classification H01M8/1051. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 04 2023 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).