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Title: Oxygen ion conducting materials

Abstract

An oxygen ion conducting ceramic oxide that has applications in industry including fuel cells, oxygen pumps, oxygen sensors, and separation membranes. The material is based on the idea that substituting a dopant into the host perovskite lattice of (La,Sr)MnO.sub.3 that prefers a coordination number lower than 6 will induce oxygen ion vacancies to form in the lattice. Because the oxygen ion conductivity of (La,Sr)MnO.sub.3 is low over a very large temperature range, the material exhibits a high overpotential when used. The inclusion of oxygen vacancies into the lattice by doping the material has been found to maintain the desirable properties of (La,Sr)MnO.sub.3, while significantly decreasing the experimentally observed overpotential.

Inventors:
; ; ;
Issue Date:
Research Org.:
Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175420
Patent Number(s):
6916570
Application Number:
10/900,054
Assignee:
University Of Chicago
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Vaughey, John, Krumpelt, Michael, Wang, Xiaoping, and Carter, J. David. Oxygen ion conducting materials. United States: N. p., 2005. Web.
Vaughey, John, Krumpelt, Michael, Wang, Xiaoping, & Carter, J. David. Oxygen ion conducting materials. United States.
Vaughey, John, Krumpelt, Michael, Wang, Xiaoping, and Carter, J. David. Tue . "Oxygen ion conducting materials". United States. https://www.osti.gov/servlets/purl/1175420.
@article{osti_1175420,
title = {Oxygen ion conducting materials},
author = {Vaughey, John and Krumpelt, Michael and Wang, Xiaoping and Carter, J. David},
abstractNote = {An oxygen ion conducting ceramic oxide that has applications in industry including fuel cells, oxygen pumps, oxygen sensors, and separation membranes. The material is based on the idea that substituting a dopant into the host perovskite lattice of (La,Sr)MnO.sub.3 that prefers a coordination number lower than 6 will induce oxygen ion vacancies to form in the lattice. Because the oxygen ion conductivity of (La,Sr)MnO.sub.3 is low over a very large temperature range, the material exhibits a high overpotential when used. The inclusion of oxygen vacancies into the lattice by doping the material has been found to maintain the desirable properties of (La,Sr)MnO.sub.3, while significantly decreasing the experimentally observed overpotential.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {7}
}

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Works referenced in this record:

Oxidation-reduction behavior of undoped and Sr-doped LaMnO3 nonstoichiometry and defect structure
journal, November 1989