Catalyst complex for fuel cells and a method for manufacturing an electrode including the same
US-2021135241-A1 · May 6, 2021 · US
Catalyst electrode for fuel cell, manufacturing method thereof and a fuel cell comprising the catalyst electrode for fuel cell
US11799093B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11799093-B2 |
| Application number | US-202217677723-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 22, 2022 |
| Priority date | Feb 28, 2020 |
| Publication date | Oct 24, 2023 |
| Grant date | Oct 24, 2023 |
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- Title
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Abstract
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Disclosed are a catalyst electrode for a fuel cell, a method for fabricating the catalyst electrode, and a fuel cell including the catalyst electrode. The presence of an ionomer-ionomer support composite in the catalyst electrode prevents the porous structure of the catalyst electrode from collapsing due to oxidation of a carbon support to avoid an increase in resistance to gas diffusion and can stably secure proton channels. The presence of carbon materials with high conductivity is effective in preventing the electrical conductivity of the electrode from deterioration resulting from the use of a metal oxide in the ionomer-ionomer support composite and is also effective in suppressing collapse of the porous structure of the electrode to prevent an increase in resistance to gas diffusion in the electrode. Based on these effects, the fuel cell exhibits excellent performance characteristics and prevents its performance from deteriorating during continuous operation.
First claim
Opening claim text (preview).
What is claimed is: 1. A catalyst electrode for a fuel cell comprising: a carbon support loaded with metal catalyst particles; an ionomer-ionomer support composite; and carbon materials selected from the group consisting of carbon nanotubes, carbon nanofibers, carbon nanorods, and mixtures thereof, wherein the ionomer-ionomer support composite comprises an ionomer support comprising a metal oxide and an ionomer covering the ionomer support, wherein the ionomer-ionomer support composite is present in an amount of 2.5 to 6.5% by volume based on the carbon support loaded with the metal catalyst particles. 2. The catalyst electrode according to claim 1 , wherein the ionomer covering the ionomer support has a thickness of 0.5 to 10 nm. 3. The catalyst electrode according to claim 1 , wherein the metal oxide has a diameter of 20 to 100 nm. 4. The catalyst electrode according to claim 1 , wherein the ionomer-ionomer support composite is present in an amount of 28 to 280 parts by weight, based on 100 parts by weight of the carbon support. 5. The catalyst electrode according to claim 1 , wherein the carbon materials are present in an amount of 0.1 to 5.0% by volume, based on 100% by volume of the carbon support. 6. A fuel cell comprising the catalyst electrode according to claim 1 .
Assignees
Inventors
Classifications
- H01M4/926Primary
on carbon or graphite · CPC title
as mixture · CPC title
Coating with slurry or ink · CPC title
- H01M4/8892Primary
Impregnation or coating of the catalyst layer, e.g. by an ionomer · CPC title
Oxides, hydroxides or oxygenated metallic salts · CPC title
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- What does patent US11799093B2 cover?
- Disclosed are a catalyst electrode for a fuel cell, a method for fabricating the catalyst electrode, and a fuel cell including the catalyst electrode. The presence of an ionomer-ionomer support composite in the catalyst electrode prevents the porous structure of the catalyst electrode from collapsing due to oxidation of a carbon support to avoid an increase in resistance to gas diffusion and ca…
- Who is the assignee on this patent?
- Korea Inst Sci & Tech
- What technology area does this patent fall under?
- Primary CPC classification H01M4/926. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 24 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).