Fuel cell electrode with gradient catalyst structure
US-9761899-B2 · Sep 12, 2017 · US
Catalytic materials for fuel cell electrodes and method for their production
US8993472B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8993472-B2 |
| Application number | US-99858609-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 6, 2009 |
| Priority date | Nov 7, 2008 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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Layered catalyst structures for fuel cells, particularly for a Proton Exchange Membrane Fuel Cell (PEMFC), are produced by a reactive spray deposition technology process. The catalyst layers so produced contain particles sized between 1 and 15 nm and clusters of such particles of a catalyst selected from the group consisting of platinum, platinum alloys with transition metals, mixtures thereof and non-noble metals. The catalyst layers without an electrically conducting supporting medium exhibit dendritic microstructure, providing high electrochemically active surface area and electron conductivity at ultra-low catalyst loading. The catalyst layers deposited on an electrically conducting medium, such as carbon, exhibit three-dimensional functional grading, which provides efficient utilization as a catalyst, high PEMFC performance at the low catalyst loading, and minimized limitations caused by reactant diffusion and activation. The catalytic layers may be produced by a single-run deposition method.
First claim
Opening claim text (preview).
The invention claimed is: 1. A catalyst layer structure for a fuel cell electrode, the structure comprising a catalyst layer comprising catalyst particles 1-15 nm in size, the layer having a catalyst loading not more than 0.1 mg/cm 2 and rendering PEM fuel cell performance of at least 0.6 W/cm 2 , the catalyst layer further comprising a proton conducting ionomer, and the structure having a catalyst concentration gradient in at least the z direction, the concentration increasing to…
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Electricity · mapped topic
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8993472B2 cover?
- Layered catalyst structures for fuel cells, particularly for a Proton Exchange Membrane Fuel Cell (PEMFC), are produced by a reactive spray deposition technology process. The catalyst layers so produced contain particles sized between 1 and 15 nm and clusters of such particles of a catalyst selected from the group consisting of platinum, platinum alloys with transition metals, mixtures thereof …
- Who is the assignee on this patent?
- Roller Justin, Maric Radenka, Fatih Khalid, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H01M4/8642. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 31 2015 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).