skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

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.

Inventors:
 [1];  [2];  [3]
  1. (Monroeville, PA)
  2. (Pittsburgh, PA)
  3. (Murrysville, PA)
Issue Date:
Research Org.:
Westinghouse Electric Corporation (Pittsburgh, PA)
OSTI Identifier:
872422
Patent Number(s):
5932146
Assignee:
Siemens Westinghouse Power Corporation (Orlando, FL) NETL
DOE Contract Number:  
FC21-91MC28055
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
air; electrode; composition; solid; oxide; fuel; cell; disclosed; material; based; lanthanum; manganite; perovskite-like; crystal; structure; a-site; comprises; mixed; lanthanide; combination; rare; earth; alkaline; dopants; b-site; mn; mg; optionally; preferably; comprise; dopant; substantially; reduces; raw; costs; comparison; compositions; purity; starting; materials; amount; controlled; provide; coefficient; thermal; expansion; closely; matches; components; closely matches; fuel cell; substantially reduces; starting material; composition comprises; air electrode; thermal expansion; alkaline earth; oxide fuel; solid oxide; rare earth; electrode material; preferably comprises; starting materials; crystal structure; electrode composition; raw material; substantially reduce; lanthanum manganite; perovskite-like crystal; closely match; preferably comprise; /252/204/429/

Citation Formats

Kuo, Lewis, Ruka, Roswell J., and Singhal, Subhash C. Air electrode composition for solid oxide fuel cell. United States: N. p., 1999. Web.
Kuo, Lewis, Ruka, Roswell J., & Singhal, Subhash C. Air electrode composition for solid oxide fuel cell. United States.
Kuo, Lewis, Ruka, Roswell J., and Singhal, Subhash C. Fri . "Air electrode composition for solid oxide fuel cell". United States. https://www.osti.gov/servlets/purl/872422.
@article{osti_872422,
title = {Air electrode composition for solid oxide fuel cell},
author = {Kuo, Lewis and Ruka, Roswell J. and Singhal, Subhash 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

Patent:

Save / Share: