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Title: Sintered electrode for solid oxide fuel cells

Patent ·
OSTI ID:872310
 [1];  [2]
  1. Pittsburgh, PA
  2. Bryan, TX
+ Show Author Affiliations

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.

Research Organization:
Westinghouse Electric Corp., Pittsburgh, PA (United States)
DOE Contract Number:
FC21-91MC28055
Assignee:
Siemens Westinghouse Power Corporation (Orlando, FL)
Patent Number(s):
US 5908713
OSTI ID:
872310
Country of Publication:
United States
Language:
English

References (6)

Development of Substrate Type Planar 10-Cell Stack SOFC: Stack Performance and Lifetime Characteristics journal January 1993
Stress and Fracture Behavior of Monolithic Fuel Cell Tapes journal August 1986
Sintering Behavior and Performance of Anode Materials for SOFC journal January 1995
Ceramic Fuel Cells journal March 1993
Conductivity of Porous Ni∕ZrO[sub 2]-Y[sub 2]O[sub 3] Cermets journal January 1987
Relations between Performance and Structure of Ni-YSZ-Cermet SOFC Anodes journal January 1995

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Related Subjects

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
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