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Gas diffusion electrode and fuel cell

US11430995B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-11430995-B2
Application numberUS-201816475515-A
CountryUS
Kind codeB2
Filing dateJan 12, 2018
Priority dateJan 19, 2017
Publication dateAug 30, 2022
Grant dateAug 30, 2022

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  1. Title

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  2. Abstract

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  3. Assignees and inventors

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  4. Key dates

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  5. First independent claim

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  6. CPC / IPC classifications

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  7. Citations and related patents

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Abstract

Official abstract text for this publication.

A gas diffusion electrode is provided that enables the achievement of a fuel cell which has high drainage performance and maintains good power generation performance, while exhibiting high power generation performance particularly at a low temperature (40° C.), if used in the fuel cell. The gas diffusion electrode includes a microporous layer on at least one surface of a conductive porous substrate, wherein the microporous layer has a fluorine compound region having a length of 3-10 μm and a void having a length of 3-10 μm.

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 a conductive porous substrate, wherein the microporous layer has a fluorine compound region having a major axis of 3 to 10 μm and a void having a major axis of 3 to 10 μm. 2. The gas diffusion electrode according to claim 1 , wherein 0.15 to 2.0 fluorine compound regions having a major axis of 3 to 10 μm are included in 1000 μm 2 of the microporous layer. 3. The gas diffusion electrode according to claim 1 , wherein 0.15 to 2.0 voids having a major axis of 3 to 10 μm are included in 1000 μm 2 of the microporous layer. 4. The gas diffusion electrode according to claim 1 , wherein an average value of the major axis of the void is 2 to 7 μm. 5. The gas diffusion electrode according to claim 1 , wherein an average value of the major axis of the fluorine compound region is 2 to 7 μm. 6. The gas diffusion electrode according to claim 1 , wherein polytetrafluoroethylene (PTFE) is contained as a fluorine compound in the fluorine compound region. 7. A fuel cell comprising the gas diffusion electrode according to claim 1 .

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What does patent US11430995B2 cover?
A gas diffusion electrode is provided that enables the achievement of a fuel cell which has high drainage performance and maintains good power generation performance, while exhibiting high power generation performance particularly at a low temperature (40° C.), if used in the fuel cell. The gas diffusion electrode includes a microporous layer on at least one surface of a conductive porous subst…
Who is the assignee on this patent?
Toray Industries
What technology area does this patent fall under?
Primary CPC classification H01M4/8605. Mapped technology areas include Electricity.
When was this patent published?
Publication date Tue Aug 30 2022 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).