Fuel cell
US-9219287-B2 · Dec 22, 2015 · US
Gas diffusion electrode and fuel cell
US10461334B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10461334-B2 |
| Application number | US-201615778529-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 16, 2016 |
| Priority date | Dec 24, 2015 |
| Publication date | Oct 29, 2019 |
| Grant date | Oct 29, 2019 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A gas diffusion electrode has a microporous layer on at least one surface of an electroconductive porous substrate. The microporous layer has a first microporous layer in contact with the electroconductive porous substrate, and a dense layer in contact with the first microporous layer. The thickness of the dense layer is at least 1 μm. The average number density B of pores having a pore diameter of 0.15-1 μm in the dense layer is at least 1.3A, where A is the average number density of pores having a pore diameter of 0.15-1 μm in the microporous layer disposed on at least one surface of the electroconductive porous substrate.
First claim
Opening claim text (preview).
The invention claimed is: 1. A gas diffusion electrode comprising a microporous layer on at least one surface of an electrically conductive porous substrate, wherein the microporous layer includes a first microporous layer that is in contact with the electrically conductive porous substrate, and a dense layer that is in contact with the first microporous layer, the dense layer having a thickness of 1 μm or more, and an average number density B of pores having a pore diameter of 0.15 μm or more and 1 μm or less in the dense layer is 1.3A or more where A is an average number density of pores having a pore diameter of 0.15 μm or more and 1 μm or less in the microporous layer disposed on at least one surface of the electrically conductive porous substrate. 2. The gas diffusion electrode according to claim 1 , wherein the microporous layer includes a second microporous layer that is in contact with the surface of the dense layer. 3. The gas diffusion electrode according to claim 2 , wherein the average number density B of pores having a pore diameter of 0.15 μm or more and 1 μm or less is 1.3C or more where C is an average number density of pores having a pore diameter of 0.15 μm or more and 1 μm or less in the second microporous layer. 4. The gas diffusion electrode according to claim 2 , wherein the dense layer has a thickness of 1 μm or more and 10 μm or less, and the second microporous layer has a thickness of 1 μm or more and 10 μm or less. 5. The gas diffusion electrode according to claim 2 , wherein the first microporous layer contains electrically conductive fine particles having a primary particle diameter of 0.040 μm or more and 0.060 μm or less, and the second microporous layer contains electrically conductive fine particles having a primary particle diameter of 0.015 μm or more and 0.040 μm or less. 6. The gas diffusion electrode according to claim 1 , wherein the dense layer contains electrically conductive fine particles having a primary particle diameter of 0.040 μm or more and 0.060 μm or less, and electrically conductive fine particles having a primary particle diameter of 0.015 μm or more and 0.040 μm or less. 7. The gas diffusion electrode according to claim 1 , wherein the microporous layer contains a hydrophobic agent, and the hydrophobic agent has a melting point of 200° C. or higher and 320° C. or lower. 8. The gas diffusion electrode according to claim 1 , wherein the gas diffusion electrode has a gas diffusibility of 30% or more in a thickness direction. 9. The gas diffusion electrode according to claim 1 , wherein the gas diffusion electrode has a gas diffusibility of 25 cc/minute or more in an in-plane direction. 10. The gas diffusion electrode according to claim 1 , wherein the microporous layer has a surface roughness of 6 μm or less. 11. A fuel cell comprising the gas diffusion electrode according to claim 1 .
Assignees
Inventors
Classifications
Sintering or firing · CPC title
layered · CPC title
Carbon-based electrodes · CPC title
- H01M4/8626Primary
characterised by the form · CPC title
Fuel cells with solid electrolytes · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10461334B2 cover?
- A gas diffusion electrode has a microporous layer on at least one surface of an electroconductive porous substrate. The microporous layer has a first microporous layer in contact with the electroconductive porous substrate, and a dense layer in contact with the first microporous layer. The thickness of the dense layer is at least 1 μm. The average number density B of pores having a pore diamete…
- 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 Oct 29 2019 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).