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Iron-based perovskite cathodes for solid oxide fuel cells

United States Patent

January 2, 2007
View the Complete Patent at the US Patent & Trademark Office
Argonne National Laboratory - Visit the Technology Development and Commercialization Website
An A and/or A' site deficient perovskite of general formula of (A.sub.1-xA'.sub.x) or of general formula A.sub.1-x-yA'.sub.xFeO.sub.3-67, wherein A is La alone or with one or more of the rare earth metals or a rare earth metal other than Ce alone or a combination of rare earth metals and X is in the range of from 0 to about 1; A' is Sr or Ca or mixtures thereof and Y is in the range of from about 0.01 to about 0.3; .delta. represents the amount of compensating oxygen loss. If either A or A' is zero the remaining A or A' is deficient. A fuel cell incorporating the inventive perovskite as a cathode is disclosed as well as an oxygen separation membrane. The inventive perovskite is preferably single phase.
Ralph; James M. (Downers Grove, IL), Rossignol; Cecile C.R. (Lyons, FR), Vaughey; John T. (Elmhurst, IL)
UChicago Argonne, LLC (Chicago, IL)
10/ 716,331
November 18, 2003
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. W-31-109-ENG-38 between the U.S. Department of Energy (DOE) and The University of Chicago representing Argonne National Laboratory.