Sintered electrode for solid oxide fuel cells

Patent · Tue Jun 01 00:00:00 EDT 1999

OSTI ID:6209418

Ruka, R J; Warner, K A

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.

• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FC21-91MC28055
• Assignee: Siemens Westinghouse Power Corp., Orlando, FL (United States)
• Patent Number(s): A; US 5908713
• Application Number: PPN: US 8-934884
• OSTI ID: 6209418
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360600 -- Other Materials
CHALCOGENIDES
CORROSION RESISTANCE
DIRECT ENERGY CONVERTERS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTRODES
ELEMENTS
FABRICATION
FUEL CELLS
METALS
NICKEL
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POROSITY
SOLID ELECTROLYTE FUEL CELLS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES