Separator for a fuel cell and manufacturing method of the separator
US6864008B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 20, 2001 |
| Grant date | Mar 8, 2005 |
| Priority date | — |
| Expiry date | Jan 3, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To provide a separator for a fuel cell made of graphite excellent in mechanical strength and gas impermeability as well as electric characteristic properties, a separator for a fuel cell is produced from a molded body produced by filling a graphite powder 21 whose surface is coated with resin 20 in a molding die and by pressure-molding the powder. Such a molded body is provided with excellent mechanical strength of 40 MPa of bending strength or higher, 10×10−8 cc·cm/cm2·sec·atm of gas permeability or lower, and electric property of 10×10−3 Ω·cm of the volume resistance or lower even if the content of resin is decreased to as low as 10 to 24 wt. %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.