Method of preparing a dimensionally stable electrode for use in a MCFC
A method is described of forming a dimensionally stable electrode structure for use in a fuel cell stack containing molten alkali metal carbonate electrolyte comprising: providing a porous plaque of nickel-chromium alloy having no more than 5 weight percent chromium. Selectively oxidizing the chromium in the plaque by exposure for at least one hour to a sufficient oxidizing potential to oxidize chromium in the presence of nickel. The exposure is provided by contacting the plaque with a gas mixture containing steam and hydrogen in a volumetric ratio of about 80-120 volumes of steam to one volume of hydrogen at a temperature of 600/sup 0/C to 800/sup 0/C to from the stable electrode structure.
- Assignee:
- Dept. of Energy, Washington, DC
- Patent Number(s):
- US 4714586
- OSTI ID:
- 5385529
- Country of Publication:
- United States
- Language:
- English
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Method of preparing a dimensionally stable electrode for use in a molten carbonate fuel cell
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Related Subjects
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHROMIUM
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTRODES
ELEMENTS
FUEL CELLS
HIGH-TEMPERATURE FUEL CELLS
HYDROGENATION
METALS
MOLTEN CARBONATE FUEL CELLS
NICKEL
OXIDATION
OXYGEN COMPOUNDS
STABILITY
STEAM
SYNTHESIS
TRANSITION ELEMENTS