Solid oxide electrochemical cell fabrication process

Patent · Tue Feb 04 04:00:00 EST 1992

OSTI ID:5392203

Dollard, W J; Folser, G R; Pal, U B; Singhal, S C

This patent describes a method of bonding an electrolyte, and an outer electrode layer on porous, doped lanthanum manganite tubular electrode. It comprises: thermal spraying a thin, axially elongated, electrically conductive, ceramic oxide interconnection strip over a narrow segment of a porous, doped lanthanum manganite tubular electrode, and then thermal spraying yttria stabilized zirconia over the remaining portion of the lanthanum manganite tubular electrode to provide a high temperature oxygen ion conductive electrolyte layer having an open pore structure, which overlaps a portion of the interconnection strip, and then forming a coating of particles of an electronic conductor on the electrolyte, and then pressurizing the outside of the electrolyte layer, and then feeding halide vapors of yttrium and zirconium to the outside of the electrolyte layer, where the vapors penetrate into the pores of the electrolyte without initiating formation of a metal oxide, and then applying a source of oxygen to the inside of the porous, tubular electrode to contact the inside of the electrolyte layer, and then heating the tube and electrolyte to a temperature sufficient to cause oxygen reaction with the halide vapors, closing electrolyte pores, and inducing oxygen ions to diffuse through the electrolyte causing reaction with the halide vapors, to form a metal oxide coating on and between the particles of electronic conductor, which coating is attached to the electrolyte layer, providing a porous exterior electrode.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA (United States)
• Patent Number(s): US 5085742; A
• Application Number: PPN: US 7-597608
• OSTI ID: 5392203
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300501* -- Fuel Cells-- Design & Development
300503 -- Fuel Cells-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
BONDING
DIRECT ENERGY CONVERTERS
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTRODES
FABRICATION
FUEL CELLS
JOINING
LANTHANUM COMPOUNDS
LAYERS
MATERIALS TESTING
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SOLID ELECTROLYTE FUEL CELLS
TESTING