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Title: Sintered electrode for solid oxide fuel cells

Abstract

A solid oxide fuel cell fuel electrode is produced by a sintering process. An underlayer is applied to the electrolyte of a solid oxide fuel cell in the form of a slurry, which is then dried. An overlayer is applied to the underlayer and then dried. The dried underlayer and overlayer are then sintered to form a fuel electrode. Both the underlayer and the overlayer comprise a combination of electrode metal such as nickel, and stabilized zirconia such as yttria-stabilized zirconia, with the overlayer comprising a greater percentage of electrode metal. The use of more stabilized zirconia in the underlayer provides good adhesion to the electrolyte of the fuel cell, while the use of more electrode metal in the overlayer provides good electrical conductivity. The sintered fuel electrode is less expensive to produce compared with conventional electrodes made by electrochemical vapor deposition processes. The sintered electrodes exhibit favorable performance characteristics, including good porosity, adhesion, electrical conductivity and freedom from degradation.

Inventors:
 [1];  [2]
  1. (Pittsburgh, PA)
  2. (Bryan, TX)
Issue Date:
Research Org.:
Westinghouse Electric Corporation (Pittsburgh, PA)
OSTI Identifier:
872310
Patent Number(s):
5908713
Assignee:
Siemens Westinghouse Power Corporation (Orlando, FL) NETL
DOE Contract Number:  
FC21-91MC28055
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
sintered; electrode; solid; oxide; fuel; cells; cell; produced; sintering; process; underlayer; applied; electrolyte; form; slurry; dried; overlayer; comprise; combination; metal; nickel; stabilized; zirconia; yttria-stabilized; comprising; percentage; provides; adhesion; electrical; conductivity; expensive; produce; compared; conventional; electrodes; electrochemical; vapor; deposition; processes; exhibit; favorable; performance; characteristics; including; porosity; freedom; degradation; performance characteristics; fuel cell; layer comprising; chemical vapor; fuel cells; oxide fuel; solid oxide; vapor deposition; electrical conductivity; deposition process; fuel electrode; stabilized zirconia; layer provides; deposition processes; sintering process; electrode metal; electrochemical vapor; yttria-stabilized zirconia; performance characteristic; conventional electrodes; cell fuel; /429/29/427/

Citation Formats

Ruka, Roswell J., and Warner, Kathryn A. Sintered electrode for solid oxide fuel cells. United States: N. p., 1999. Web.
Ruka, Roswell J., & Warner, Kathryn A. Sintered electrode for solid oxide fuel cells. United States.
Ruka, Roswell J., and Warner, Kathryn A. Fri . "Sintered electrode for solid oxide fuel cells". United States. https://www.osti.gov/servlets/purl/872310.
@article{osti_872310,
title = {Sintered electrode for solid oxide fuel cells},
author = {Ruka, Roswell J. and Warner, Kathryn A.},
abstractNote = {A solid oxide fuel cell fuel electrode is produced by a sintering process. An underlayer is applied to the electrolyte of a solid oxide fuel cell in the form of a slurry, which is then dried. An overlayer is applied to the underlayer and then dried. The dried underlayer and overlayer are then sintered to form a fuel electrode. Both the underlayer and the overlayer comprise a combination of electrode metal such as nickel, and stabilized zirconia such as yttria-stabilized zirconia, with the overlayer comprising a greater percentage of electrode metal. The use of more stabilized zirconia in the underlayer provides good adhesion to the electrolyte of the fuel cell, while the use of more electrode metal in the overlayer provides good electrical conductivity. The sintered fuel electrode is less expensive to produce compared with conventional electrodes made by electrochemical vapor deposition processes. The sintered electrodes exhibit favorable performance characteristics, including good porosity, adhesion, electrical conductivity and freedom from degradation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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