| US 7,468,218 B2 | ||
| Composite solid oxide fuel cell anode based on ceria and strontium titanate | ||
| Olga A. Marina, Richland, Wash. (US); and Larry R. Pederson, Richland, Wash. (US) | ||
| Assigned to Battelle Memorial Institute, Richland, Wash. (US) | ||
| Filed on Jul. 23, 2004, as Appl. No. 10/897,521. | ||
| Claims priority of provisional application 60/568954, filed on May 07, 2004. | ||
| Prior Publication US 2005/0250000 A1, Nov. 10, 2005 | ||
| Int. Cl. H01M 4/90 (2006.01); H01M 8/12 (2006.01) | ||
| U.S. Cl. 429—40 [429/30] | 5 Claims |
| 1. An electrode in a solid oxide fuel cell comprising a two-phase mixture having:
a first phase of doped strontium titanate of the general formula Sr1-xMxTiO3-δ, where M is selected from a group consisting of yttrium, scandium, lanthanum, and combinations thereof, wherein x may vary
typically from 0.01 to 0.5, and wherein δ is indicative of some degree of oxygen non-stoichiometry; and
a second phase of donor-doped cerium oxide of the general formula NyCe1-yO2-δ, where N is niobium (Nb), vanadium (V), antimony (Sb) tantalum (Ta), or combinations thereof, and where “y” may vary typically
from 0.001 to 0.1; and
wherein the electrode is an oxide substantially without a metal phase and the ratio of Ti in said first phase to the sum of
Ce and N in said second phase is from about 0.2 to about 0.75.
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