Method of making sulfur tolerant composite cermet electrodes for solid oxide electrochemical cells

Patent · Tue Mar 14 00:00:00 EST 1989

OSTI ID:6099953

Isenberg, A O

A method is described for bonding a separate, porous, active layer on an electronically conductive fuel cell electrode attached to a solid electrolyte, oxygen ion transporting oxide layer comprising: forming a coating of particles of an electronic conductor selected from the group consisting of nickel, cobalt, and mixtures thereof on a first surface of an oxygen ion transporting, solid oxide electrolyte layer comprising zirconia; applying a source of oxygen to a second surface of the solid oxide electrolyte layer; applying a metal halide vapor to the first surface of the solid oxide electrolyte layer; heating the oxygen transporting, solid oxide electrolyte layer to a temperature sufficient to induce oxygen to diffuse through the oxide layer and react with the metal halide vapor; coating both the particles and the ion conducting metal oxide skeletal structure with a separate, salt coating which upon heating will form an oxide selected from the group consisting of ceria, doped ceria, uranium oxide, doped uranium oxide, and mixtures thereof; and then heating the salt coated structure at a temperature of from about 500/sup 0/C to about 1400/sup 0/C, to form a separate, porous, ionic-electronic conductive, active coating comprising an oxide selected from the group consisting of ceria, doped ceria, uranium oxide, doped uranium oxide, and mixtures thereof.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): US 4812329
• OSTI ID: 6099953
• Resource Relation: Patent File Date: Filed date 13 Jul 1987
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
ELECTRODES
FABRICATION
FUEL CELLS
CERMETS
COBALT
CORROSION PROTECTION
CORROSION RESISTANCE
DESIGN
ELECTRIC CONDUCTORS
HALIDES
NICKEL
OXIDES
SOLID ELECTROLYTES
CHALCOGENIDES
COMPOSITE MATERIALS
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELEMENTS
HALOGEN COMPOUNDS
MATERIALS
METALS
OXYGEN COMPOUNDS
TRANSITION ELEMENTS
300501* - Fuel Cells- Design & Development