Claims
- 1. A method of making a fluid diffusion layer for a fuel cell, the method comprising:
providing a substrate; applying a loading composition to the substrate, the loading composition comprising a loading material and a carrier, the loading material comprising carbon black and graphite particles in a weight ratio of less than about 50:50; and drying the substrate and the loading composition applied thereto.
- 2. A fluid diffusion layer comprising a substrate and a loading material, the loading material comprising carbon black and graphite particles in a weight ratio of less than about 50:50.
- 3. A fluid diffusion layer comprising a substrate and a loading material, the loading material comprising carbon black and graphite particles, the fluid diffusion layer having a through-plane resistance of about 0.5 millivolt or less and an air flow at 1 psi (6.9 kPa) of 80,000 cc/min or more.
- 4. A loading composition adapted to be applied to a substrate for the preparation of a fluid diffusion layer of the type used in solid polymer electrolyte fuel cells, the loading composition comprising a loading material and a carrier, wherein the loading material comprises carbon black and graphite particles in a weight ratio of less than about 50:50.
- 5. A method of preparing a fuel cell electrode, the method comprising:
providing a substrate; applying a loading composition to the substrate, the loading composition comprising a loading material and a carrier, the loading material comprising carbon black and graphite particles in a weight ratio of less than about 50:50; drying the substrate and the loading composition applied thereto, whereby a fluid diffusion layer is formed as a result of the applying and drying steps; applying an aqueous catalyst composition comprising a fuel cell catalyst to the fluid diffusion layer; and drying the fluid diffusion layer and the aqueous catalyst composition applied thereto, whereby an electrode is formed.
- 6. A fuel cell electrode comprising a fluid diffusion layer and a catalyst layer, and the fluid diffusion layer comprising a substrate and a loading material, the loading material comprising carbon black and graphite particles in a weight ratio of less than about 50:50.
CROSS-REFERENCE TO RELATED APPLICATION(S)
[0001] This application is related to and claims priority benefits from U.S. Provisional Patent Application Serial No. 60/301,735, filed Jun. 28, 2001, entitled “Fluid Diffusion Layers for Fuel Cells”. The '735 provisional application is hereby incorporated by reference herein in its entirety.
Provisional Applications (1)
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Number |
Date |
Country |
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60301735 |
Jun 2001 |
US |