Lanthanum manganite-based air electrode for solid oxide fuel cells
Abstract
An air electrode material for a solid oxide fuel cell is disclosed. The electrode material is based on lanthanum manganite having a perovskite-like crystal structure ABO.sub.3. The A-site of the air electrode material preferably comprises La, Ca, Ce and at least one lanthanide selected from Sm, Gd, Dy, Er, Y and Nd. The B-site of the electrode material comprises Mn with substantially no dopants. The ratio of A:B is preferably slightly above 1. A preferred air electrode composition is of the formula La.sub.w Ca.sub.x Ln.sub.y Ce.sub.z MnO.sub.3, wherein Ln comprises at least one lanthanide selected from Sm, Gd, Dy, Er, Y and Nd, w is from about 0.55 to about 0.56, x is from about 0.255 to about 0.265, y is from about 0.175 to about 0.185, and z is from about 0.005 to about 0.02. The air electrode material possesses advantageous chemical and electrical properties as well as favorable thermal expansion and thermal cycle shrinkage characteristics.
- Inventors:
-
- Pittsburgh, PA
- Monroeville, PA
- Essex Junction, VT
- Issue Date:
- Research Org.:
- Westinghouse Electric Corp., Pittsburgh, PA (United States)
- OSTI Identifier:
- 872355
- Patent Number(s):
- 5916700
- Assignee:
- Siemens Westinghouse Power Corporation (Orlando, FL)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- DOE Contract Number:
- FC21-91MC28055
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- lanthanum; manganite-based; air; electrode; solid; oxide; fuel; cells; material; cell; disclosed; based; manganite; perovskite-like; crystal; structure; a-site; preferably; comprises; lanthanide; selected; gd; b-site; mn; substantially; dopants; ratio; slightly; preferred; composition; formula; ln; z; mno; 55; 56; 255; 265; 175; 185; 005; 02; possesses; advantageous; chemical; electrical; properties; favorable; thermal; expansion; cycle; shrinkage; characteristics; fuel cell; air electrode; thermal expansion; fuel cells; oxide fuel; solid oxide; electrode material; preferably comprises; electrical properties; material comprises; crystal structure; electrode composition; material preferably; lanthanum manganite; thermal cycle; perovskite-like crystal; preferably comprise; /429/252/501/
Citation Formats
Ruka, Roswell J, Kuo, Lewis, and Li, Baozhen. Lanthanum manganite-based air electrode for solid oxide fuel cells. United States: N. p., 1999.
Web.
Ruka, Roswell J, Kuo, Lewis, & Li, Baozhen. Lanthanum manganite-based air electrode for solid oxide fuel cells. United States.
Ruka, Roswell J, Kuo, Lewis, and Li, Baozhen. Fri .
"Lanthanum manganite-based air electrode for solid oxide fuel cells". United States. https://www.osti.gov/servlets/purl/872355.
@article{osti_872355,
title = {Lanthanum manganite-based air electrode for solid oxide fuel cells},
author = {Ruka, Roswell J and Kuo, Lewis and Li, Baozhen},
abstractNote = {An air electrode material for a solid oxide fuel cell is disclosed. The electrode material is based on lanthanum manganite having a perovskite-like crystal structure ABO.sub.3. The A-site of the air electrode material preferably comprises La, Ca, Ce and at least one lanthanide selected from Sm, Gd, Dy, Er, Y and Nd. The B-site of the electrode material comprises Mn with substantially no dopants. The ratio of A:B is preferably slightly above 1. A preferred air electrode composition is of the formula La.sub.w Ca.sub.x Ln.sub.y Ce.sub.z MnO.sub.3, wherein Ln comprises at least one lanthanide selected from Sm, Gd, Dy, Er, Y and Nd, w is from about 0.55 to about 0.56, x is from about 0.255 to about 0.265, y is from about 0.175 to about 0.185, and z is from about 0.005 to about 0.02. The air electrode material possesses advantageous chemical and electrical properties as well as favorable thermal expansion and thermal cycle shrinkage characteristics.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1999},
month = {Fri Jan 01 00:00:00 EST 1999}
}