Fuel cell bipolar plate, process for producing the same, and fuel cell including the bipolar plate
US7704624B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2007 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Jan 24, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A fuel cell bipolar plate that while retaining its mechanical strength, has its electrical conductivity enhanced; a process for producing the same; and a fuel cell including the bipolar plate. There is provided a fuel cell bipolar plate comprising laminated molded item formed by a sheet-shaped molding material, wherein the sheet-shaped molding material contains a resin and a carbon material, and wherein the laminated molded item has a laminate structure of, arranged in sequence, surface layer C/inner layer B/central layer A/inner layer B′/surface layer C′, and wherein each of the central layer A, inner layer B, inner layer B′, surface layer C and surface layer C′ consists of a single layer or multilayer of the sheet-shaped molding material, and wherein when the carbon material content of central layer A is referred to as a, the carbon material content of inner layer B as b, the carbon material content of inner layer B′ as b′, the carbon material content of surface layer C as c and the carbon material content of surface layer C′ as c′, there are satisfied the relationships 55≦a≦85, 55≦c≦85, 55≦c′≦85, 10≦a−b≦30, 10≦c−b≦30, 10≦a−b′≦30 and 10≦c′−b′≦30 (the unit of each of a, b, b′, c a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.