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):
- 5932146
- Application Number:
- PAN: 8-995,078
- Assignee:
- Siemens Westinghouse Power Corp., Orlando, FL (United States)
- 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}
}