Membrane electrode, fuel cell gas diffusion layer and process for preparing the fuel cell gas diffusion layer
US11527762B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2022 |
| Grant date | Dec 13, 2022 |
| Priority date | — |
| Expiry date | Apr 25, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a membrane electrode, fuel cell gas diffusion layer, and process for preparing the fuel cell gas diffusion layer, the process comprising: S1 coating microporous layer slurry on the surface of hydrophobic carbon paper; the microporous layer slurry was obtained by dispersing mixture of carbon powder, polytetrafluoroethylene dispersion solution, thickener, and solvent; S2 moving the hydrophobic carbon paper coated with the microporous layer slurry to a porous ceramic plate, and connecting a vacuum pump to the porous ceramic plate, vacuumed for adsorption pre-infiltration treatment, and then dried. S3 continuing to coat the microporous layer slurry on the hydrophobic carbon paper dried in step S2, then drying, and then sintering at 250-400° C. to obtain a gas diffusion layer. The beneficial effects of this disclosure include: this disclosure improve the water vapor erosion resistance of the microporous layer and the durability of the gas diffusion layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.