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Title: Iron-based perovskite cathodes for solid oxide fuel cells

Abstract

An A and/or A' site deficient perovskite of general formula of (A.sub.1-xA'.sub.x).sub.1-yFeO.sub.3-.delta. 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.

Inventors:
; ;
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1176054
Patent Number(s):
7157165
Application Number:
10/716,331
Assignee:
UChicago Argonne, LLC (Chicago, IL)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Ralph, James M., Rossignol, Cecile C.R., and Vaughey, John T.. Iron-based perovskite cathodes for solid oxide fuel cells. United States: N. p., 2007. Web.
Ralph, James M., Rossignol, Cecile C.R., & Vaughey, John T.. Iron-based perovskite cathodes for solid oxide fuel cells. United States.
Ralph, James M., Rossignol, Cecile C.R., and Vaughey, John T.. Tue . "Iron-based perovskite cathodes for solid oxide fuel cells". United States. https://www.osti.gov/servlets/purl/1176054.
@article{osti_1176054,
title = {Iron-based perovskite cathodes for solid oxide fuel cells},
author = {Ralph, James M. and Rossignol, Cecile C.R. and Vaughey, John T.},
abstractNote = {An A and/or A' site deficient perovskite of general formula of (A.sub.1-xA'.sub.x).sub.1-yFeO.sub.3-.delta. 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {1}
}

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Works referenced in this record:

Chemical diffusion in perovskite cathodes of solid oxide fuel cells: the Sr doped LaMn1−xMxO3 (MCo, Fe) systems
journal, January 2001


A study on PrMnO3-based perovskite oxides used in SOFC cathodes
journal, October 2002


Phase Behavior of Lanthanum Strontium Manganites
journal, January 1999


Properties of A-site-deficient La0.6Sr0.4Co0.2Fe0.8O3−δ-based perovskite oxides
journal, November 1999


Changes in the Phases and Electrical Conduction Properties of (La[sub 1−x]Sr[sub x])[sub 1−y]MnO[sub 3−δ]
journal, January 1991


Development of Solid-Oxide Fuel Cells That Operate at 500°C
journal, January 1999