Metal separator for fuel cell and manufacturing method thereof
US8298723B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2008 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Jul 7, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A metal separator 1 for a fuel cell according to the invention is a metal separator for a fuel cell manufactured by using a metal substrate 2 with a flat surface, or with concave gas flow paths formed on at least a part of the surface. The metal separator 1 includes an acid-resistant metal film 3 formed over the surface of the metal substrate 2, and containing one or more kinds of non-noble metals selected from the group comprised of Zr, Nb, and Ta, and a conductive alloy film 4 formed over the acid-resistant metal film 3, and containing one or more kinds of noble metals selected from the group comprised of Au and Pt, and one or more kinds of non-noble metals selected from the group comprised of Zr, Nb, and Ta. A method for manufacturing the metal separator for a fuel cell according to the invention includes a step S1 of depositing an acid-resistant metal film, and a step S2 of depositing a conductive alloy film. With this structure, the invention provides the metal separator for a fuel cell with an excellent acid resistance and a low contact resistance, and a manufacturing method thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.