Gas diffusion electrode medium for fuel cell
US-9972847-B2 · May 15, 2018 · US
Gas diffusion electrode and fuel cell
US11088370B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11088370-B2 |
| Application number | US-201716333768-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 15, 2017 |
| Priority date | Sep 29, 2016 |
| Publication date | Aug 10, 2021 |
| Grant date | Aug 10, 2021 |
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- Title
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Abstract
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A gas diffusion electrode including: a conductive porous substrate and a microporous layer on at least one side of the conductive porous substrate; in which the total of regions passing through the microporous layer in the thickness direction has an area ratio of 0.1% or more and 1% or less; and in which the microporous layer has a portion that has penetrated into the conductive porous substrate (hereinafter referred to as penetration portion), the penetration portion having a thickness ratio of 30% or more and 70% or less with respect to 100% of the thickness of the microporous layer. The gas diffusion electrode used for fuel cells affords fuel cells having high water removal performance and high power generation performance.
First claim
Opening claim text (preview).
The invention claimed is: 1. A gas diffusion electrode comprising: a conductive porous substrate, and a microporous layer on at least one side of said conductive porous substrate; wherein the total of regions passing through said microporous layer in the thickness direction has an area ratio of 0.1% or more and 1% or less, and wherein said microporous layer has a portion that has penetrated into said conductive porous substrate (hereinafter referred to as penetration portion), said penetration portion having a thickness ratio (hereinafter referred to as penetration amount) of 30% or more and 70% or less with respect to 100% of the thickness of said microporous layer, and said microporous layer comprises a non-penetration portion that is the portion other than the penetration portion, wherein said non-penetration portion has a fluorine intensity of 5 or more and 20 or less, assuming that said non-penetration portion has a carbon intensity of 100. 2. The gas diffusion electrode according to claim 1 , wherein number of said regions passing through said microporous layer in the thickness direction is 0.4 or more and 7.0 or less per 1 mm 2 area of said gas diffusion electrode. 3. The gas diffusion electrode according to claim 1 , wherein said conductive porous substrate has a density of 0.15 g/cm 3 or more and 0.5 g/cm 3 or less. 4. The gas diffusion electrode according to claim 1 , wherein said microporous layer has a thickness of 100 μm or less. 5. A fuel cell comprising said gas diffusion electrode according to claim 1 .
Assignees
Inventors
Classifications
by diffusion, e.g. making use of membranes · CPC title
containing only metallic or ceramic material, e.g. made by sintering or sputtering · CPC title
- H01M4/861Primary
with a gradient in the porosity · CPC title
- H01M4/8605Primary
Porous electrodes · CPC title
Gas diffusion layers · CPC title
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- What does patent US11088370B2 cover?
- A gas diffusion electrode including: a conductive porous substrate and a microporous layer on at least one side of the conductive porous substrate; in which the total of regions passing through the microporous layer in the thickness direction has an area ratio of 0.1% or more and 1% or less; and in which the microporous layer has a portion that has penetrated into the conductive porous substrat…
- Who is the assignee on this patent?
- Toray Industries
- What technology area does this patent fall under?
- Primary CPC classification H01M4/861. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 10 2021 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).