Catalyst layer edge protection for enhanced MEA durability in PEM fuel cells
US6861173B2 · kind B2 · utility
10Cited by
9References
26Claims
0Family size
Inventors
Key dates
| Filing date | Oct 8, 2002 |
| Grant date | Mar 1, 2005 |
| Priority date | — |
| Expiry date | Jun 21, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A membrane electrode assembly comprising an ionically conductive member and an electrode, wherein the electrode is a smooth, continuous layer that completely covers and supports the ionically conductive member. The electrode further comprises a central region and a peripheral region, wherein a gradient of electrochemically active material exists between the central region and the peripheral region such that a content of the electrochemically active material is greater in the central region than the peripheral region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.