Stabilizing metal components in electrodes of electrochemical cells
This patent describes a solid oxide fuel cell having a porous fuel electrode that comprises nickel particles subject to transfer into a gaseous phase, embedded in a ceramic skeleton material. A method of reducing the transfer consists the steps of: (A) supplying to the porous fuel electrode a solution comprising metal organic compound selected from the group consisting of metal acetates, and metal acetates mixed with metal nitrates that, when heated, forms a water vapor impervious, electronically conducting oxide coating; and (B) slowly heating the fuel electrode and applied solution in a partially reducing atmosphere, to evaporate solvent, decompose the organic compound, and form a continuous, water impervious layer of electronically conducting oxide selected from the group consisting of an oxide coating containing lanthanum chromite, an oxide coating containing strontium titanate, and an oxide coating containing cerium oxide, completely covering the exposed nickel particles of the fuel electrode, which nickel particles remain in the metallic state, where the heating is at a rate of longer than 1 hour from room temperature to 600{sup 0}C.
- Assignee:
- Westinghouse Electric Corp., Pittsburgh, PA
- Patent Number(s):
- US 4849254
- Application Number:
- PPN: US 7160453A
- OSTI ID:
- 5495256
- Resource Relation:
- Patent File Date: 25 Feb 1988
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FUEL CELLS
ELECTRODES
ACETATES
CERAMICS
CERIUM OXIDES
CHROMIUM OXIDES
LANTHANUM COMPOUNDS
NICKEL
NITRATES
SYNTHESIS
TITANATES
CARBOXYLIC ACID SALTS
CERIUM COMPOUNDS
CHALCOGENIDES
CHROMIUM COMPOUNDS
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELEMENTS
METALS
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
300503* - Fuel Cells- Materials
Components
& Auxiliaries