Method of doping interconnections for electrochemical cells
The patent describes a method of bonding a dense, electronically conductive interconnection layer on a porous, electronically conductive, electrode structure. It comprises: forming a layer of metal oxide particles, where the metal is selected from the group consisting of Ca, Sr, Co, Ba, Mg, and mixtures thereof on a portion of a first surface of a porous, electronically conductive, electrode structure; heating the electrode structure; applying metal halide vapor comprising lanthanum halide and chromium halide to the first surface of the porous electrode structure and applying a source of oxygen to a second, opposite surface of the porous electrode structure, so that oxygen contacts the metal halide vapor at the first surface of the electrode, to cause a reaction of the oxygen with the metal halide vapor and cause a dense, lanthanum-chromium oxide structure to grow from the first electrode surface, between and around the metal oxide particles, where metal ions in the metal oxide particles start to diffuse into the lanthanum-chromium oxide structure as it grows thicker with time; and heat annealing the electrode-lanthanum-chromium oxide structure in air.
- Assignee:
- Westinghouse Electric Corp., Pittsburgh, PA
- Patent Number(s):
- A; US 4895576
- Application Number:
- PPN: US 7182277--A
- OSTI ID:
- 6967288
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
300503* -- Fuel Cells-- Materials
Components
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36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
CRYSTAL DOPING
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTRONIC STRUCTURE
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MATERIALS TESTING
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
TESTING
TRANSITION ELEMENT COMPOUNDS