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Title: Sintered electrode for solid oxide fuel cells

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. 4 figs.
Authors:
;
Publication Date:
OSTI Identifier:
6209418
Report Number(s):
US 5908713; A
PPN: US 8-934884
DOE Contract Number:
FC21-91MC28055
Resource Type:
Patent
Resource Relation:
Patent File Date: 22 Sep 1997
Sponsoring Org:
DOE; USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; 36 MATERIALS SCIENCE; CORROSION RESISTANCE; ELECTRIC CONDUCTIVITY; ELECTRODES; FABRICATION; NICKEL; POROSITY; SOLID ELECTROLYTE FUEL CELLS; ZIRCONIUM OXIDES; CHALCOGENIDES; DIRECT ENERGY CONVERTERS; ELECTRICAL PROPERTIES; ELECTROCHEMICAL CELLS; ELEMENTS; FUEL CELLS; METALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; ZIRCONIUM COMPOUNDS 300503* -- Fuel Cells-- Materials, Components, & Auxiliaries; 360600 -- Other Materials