Inventors:
John Vaughey - Elmhurst IL
Michael Krumpelt - Naperville IL
Xiaoping Wang - Downers Grove IL
J. David Carter - Bolingbrook IL
Assignee:
University of Chicago - Chicago IL
International Classification:
C01G 4512
US Classification:
423599, 502303, 502324, 429220, 429223, 429224, 429229
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 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 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 , while significantly decreasing the experimentally observed overpotential.