| US 7,615,293 B2 | ||
| Fuel cell electrode with redox catalyst | ||
| William E. Farneth, Wilmington, Del. (US); Michael B. Damore, Wilmington, Del. (US); and Mark Andrew Harmer, Kennett Square, Pa. (US) | ||
| Assigned to E. I. du Pont de Nemours and Company, Wilmington, Del. (US) | ||
| Filed on Sep. 01, 2004, as Appl. No. 10/932,371. | ||
| Claims priority of provisional application 60/508424, filed on Oct. 03, 2003. | ||
| Prior Publication US 2005/0074663 A1, Apr. 07, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H01M 8/16 (2006.01); H01M 4/00 (2006.01); C12M 1/00 (2006.01) | ||
| U.S. Cl. 429—12 [429/40; 435/817; 204/403.01] | 15 Claims |
| 1. A fuel cell electrode comprising a porous current collector comprising an electrical conducting material in contact with
a multitude of domains, each domain containing:
a) a redox catalyst; and
b) an electron transport mediator;
wherein the redox catalyst and electron transport mediator are in fluid association with each other within the domain and
wherein the redox catalyst and the electron transport mediator are bounded in the domain by the porous current collector and
a containment material, wherein said containment material is selected from the group consisting of carbon, silica, titania,
alumina, polyesters, polyamides, polyimides, fluoropolymers, polyelectrolytes, organosubstituted silica, silicones, organosubstituted
titania, and organo metal oxides.
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