Carbon fiber paper for solid polymer fuel cells
US6489051B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1999 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Dec 20, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides carbon fibre paper for use as current collectors for a polymer electrolyte fuel cell.Specifically, it relates to a carbon fibre paper in a polymer electrolyte fuel cell in a state where short carbon fibres are bound with a polymer material and, taking the thickness as X mm, the thickness at the time of 2.9 MPa applied pressure as Y mm and the length of the short carbon fibre as W mm, at least 95% of the short carbon fibres excluding those of length (Y+0.1) mm or less satisfy the relation W≧5X. Taking the average length as Z mm, it is also preferred that the relation Z≧5X also be satisfied, and the short carbon fibre diameter D (&mgr;m), tensile strength &sgr; (MPa) and tensile modulus (E) satisfy the following relation:&sgr;/(E×D)≧0.5×10−3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.