Electrode catalyst for fuel cell and method of production of same
US-2018316024-A1 · Nov 1, 2018 · US
Fuel cell electrode catalyst, method for selecting the same, and fuel cell including the same
US11715833B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11715833-B2 |
| Application number | US-202217653966-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 8, 2022 |
| Priority date | Mar 11, 2021 |
| Publication date | Aug 1, 2023 |
| Grant date | Aug 1, 2023 |
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- Title
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Abstract
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A fuel cell electrode catalyst includes catalyst metal particles and electrically conductive support particles supporting the catalyst metal particles. In the fuel cell electrode catalyst, a proportion of a surface area occupied by the catalyst metal particles with particle sizes of 4.5 nm or less to a surface area of the catalyst metal particles calculated from a transmission electron microscope image is 5% or less.
First claim
Opening claim text (preview).
What is claimed is: 1. A fuel cell electrode catalyst, comprising: catalyst metal particles; and electrically conductive support particles supporting the catalyst metal particles, wherein a proportion of a surface area occupied by the catalyst metal particles with particle sizes of 4.5 nm or less to a surface area of the catalyst metal particles calculated from a transmission electron microscope image is 5% or less. 2. The fuel cell electrode catalyst according to claim 1 , wherein the fuel cell electrode catalyst is an electrode catalyst for a cathode catalyst layer. 3. A polymer electrolyte fuel cell comprising a membrane electrode assembly, the membrane electrode assembly being composed of an anode catalyst layer, a cathode catalyst layer, and a polymer electrolyte membrane interposed between the anode catalyst layer and the cathode catalyst layer, wherein an electrode catalyst included in the cathode catalyst layer is the fuel cell electrode catalyst according to claim 1 . 4. A method for selecting a fuel cell electrode catalyst including catalyst metal particles and electrically conductive support particles supporting the catalyst metal particles, the method comprising selecting a fuel cell electrode catalyst in which a proportion of a surface area occupied by the catalyst metal particles with particle sizes of 4.5 nm or less to a surface area of the catalyst metal particles calculated from a transmission electron microscope image is 5% or less.
Assignees
Inventors
Classifications
- H01M4/925Primary
supported on carriers, e.g. powder carriers · CPC title
characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) · CPC title
Positive electrodes · CPC title
Fuel cells with polymeric electrolytes · CPC title
- H01M4/921Primary
Alloys or mixtures with metallic elements · CPC title
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- What does patent US11715833B2 cover?
- A fuel cell electrode catalyst includes catalyst metal particles and electrically conductive support particles supporting the catalyst metal particles. In the fuel cell electrode catalyst, a proportion of a surface area occupied by the catalyst metal particles with particle sizes of 4.5 nm or less to a surface area of the catalyst metal particles calculated from a transmission electron microsco…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd, Cataler Corp
- What technology area does this patent fall under?
- Primary CPC classification H01M4/925. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 01 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).