Fuel cell
US-9219287-B2 · Dec 22, 2015 · US
Gas diffusion electrode medium for fuel cell
US10003079B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10003079-B2 |
| Application number | US-201314398842-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 25, 2013 |
| Priority date | May 14, 2012 |
| Publication date | Jun 19, 2018 |
| Grant date | Jun 19, 2018 |
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Abstract
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A gas diffusion electrode medium is for a fuel cell, has a low in-plane gas permeability and favorable water drainage characteristics in addition to high conductivity, and is able to exhibit high cell performance across a wide temperature range from low temperatures to high temperatures. The gas diffusion electrode medium is characterized by a microporous region being disposed at least at one surface of an electrode substrate, and the microporous region containing flake graphite having an aspect ratio of 50-5000.
First claim
Opening claim text (preview).
The invention claimed is: 1. A polymer electrolyte fuel cell having a gas diffusion electrode medium, wherein a microporous region is arranged on at least one surface of an electrode base material having pore sizes of 30-80 μm, and the microporous region contains a flake graphite having an aspect ratio of 50 to 5000 and acetylene black, and wherein a mixing mass ratio of the acetylene black to the flake graphite is 0.1 to 4. 2. The polymer electrolyte fuel cell according to claim 1 , wherein a microporous region is arranged on both surfaces of an electrode base material, and the microporous region arranged on at least one surface contains a flake graphite having an aspect ratio of 50 to 5000. 3. The polymer electrolyte fuel cell according to claim 1 , wherein a mean thickness of the flake graphite is 0.001 to 0.5 μm. 4. The polymer electrolyte fuel cell according to claim 1 , wherein the flake graphite has a surface oxygen concentration {O/C} measured by X-ray photoelectron spectroscopy of 0.01 to 0.1. 5. The polymer electrolyte fuel cell according to claim 1 , wherein the microporous region contains a water-repelling material.
Assignees
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Classifications
Carbon-based electrodes · CPC title
Fuel cells with polymeric electrolytes · CPC title
- H01M4/8626Primary
characterised by the form · CPC title
Organic polymers · CPC title
- H01M4/8657Primary
layered · CPC title
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- What does patent US10003079B2 cover?
- A gas diffusion electrode medium is for a fuel cell, has a low in-plane gas permeability and favorable water drainage characteristics in addition to high conductivity, and is able to exhibit high cell performance across a wide temperature range from low temperatures to high temperatures. The gas diffusion electrode medium is characterized by a microporous region being disposed at least at one s…
- Who is the assignee on this patent?
- Toray Industries
- What technology area does this patent fall under?
- Primary CPC classification H01M4/8626. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 19 2018 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).