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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 Corporation (Pittsburgh, PA)
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)

Ceramic Fuel Cells journal March 1993
Development of Substrate Type Planar 10-Cell Stack SOFC: Stack Performance and Lifetime Characteristics journal January 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
Stress and Fracture Behavior of Monolithic Fuel Cell Tapes journal August 1986
Sintering Behavior and Performance of Anode Materials for SOFC journal January 1995

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