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Title: Air electrode composition for solid oxide fuel cell

Abstract

An air electrode composition for a solid oxide fuel cell is disclosed. The air electrode material is based on lanthanum manganite having a perovskite-like crystal structure ABO{sub 3}. The A-site of the air electrode composition comprises a mixed lanthanide in combination with rare earth and alkaline earth dopants. The B-site of the composition comprises Mn in combination with dopants such as Mg, Al, Cr and Ni. The mixed lanthanide comprises La, Ce, Pr and, optionally, Nd. The rare earth A-site dopants preferably comprise La, Nd or a combination thereof, while the alkaline earth A-site dopant preferably comprises Ca. The use of a mixed lanthanide substantially reduces raw material costs in comparison with compositions made from high purity lanthanum starting materials. The amount of the A-site and B-site dopants is controlled in order to provide an air electrode composition having a coefficient of thermal expansion which closely matches that of the other components of the solid oxide fuel cell. 3 figs.

Inventors:
; ;
Issue Date:
Research Org.:
Westinghouse Electric Corporation
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
678573
Patent Number(s):
5,932,146
Application Number:
PAN: 8-995,078
Assignee:
Siemens Westinghouse Power Corp., Orlando, FL (United States) PTO; SCA: 300503; 360200; PA: EDB-99:084481; SN: 99002124542
DOE Contract Number:  
FC21-91MC28055
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 3 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; 36 MATERIALS SCIENCE; SOLID ELECTROLYTE FUEL CELLS; ELECTRODES; DESIGN; LANTHANUM OXIDES; MANGANESE OXIDES; CRYSTAL STRUCTURE; DOPED MATERIALS; THERMAL EXPANSION

Citation Formats

Kuo, L., Ruka, R.J., and Singhal, S.C. Air electrode composition for solid oxide fuel cell. United States: N. p., 1999. Web.
Kuo, L., Ruka, R.J., & Singhal, S.C. Air electrode composition for solid oxide fuel cell. United States.
Kuo, L., Ruka, R.J., and Singhal, S.C. Tue . "Air electrode composition for solid oxide fuel cell". United States.
@article{osti_678573,
title = {Air electrode composition for solid oxide fuel cell},
author = {Kuo, L. and Ruka, R.J. and Singhal, S.C.},
abstractNote = {An air electrode composition for a solid oxide fuel cell is disclosed. The air electrode material is based on lanthanum manganite having a perovskite-like crystal structure ABO{sub 3}. The A-site of the air electrode composition comprises a mixed lanthanide in combination with rare earth and alkaline earth dopants. The B-site of the composition comprises Mn in combination with dopants such as Mg, Al, Cr and Ni. The mixed lanthanide comprises La, Ce, Pr and, optionally, Nd. The rare earth A-site dopants preferably comprise La, Nd or a combination thereof, while the alkaline earth A-site dopant preferably comprises Ca. The use of a mixed lanthanide substantially reduces raw material costs in comparison with compositions made from high purity lanthanum starting materials. The amount of the A-site and B-site dopants is controlled in order to provide an air electrode composition having a coefficient of thermal expansion which closely matches that of the other components of the solid oxide fuel cell. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}