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Title: 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:
 [1];  [2];  [3]
  1. Pittsburgh, PA
  2. Monroeville, PA
  3. Essex Junction, VT
Publication Date:
Research Org.:
Westinghouse Electric Corporation (Pittsburgh, PA)
OSTI Identifier:
872355
Patent Number(s):
US 5916700
Assignee:
Siemens Westinghouse Power Corporation (Orlando, FL)
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 = {},
url = {https://www.osti.gov/biblio/872355}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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