Method of preparing a dimensionally stable electrode for use in a MCFC

Patent · Mon Dec 21 23:00:00 EST 1987

OSTI ID:866452

Swarr, Thomas E ^[1]; Wnuck, Wayne G ^[2]

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1. South Windsor, CT
2. Stafford Springs, CT

A method is disclosed for preparing a dimensionally stable electrode structure, particularly nickel-chromium anodes, for use in a molten carbonate fuel cell stack. A low-chromium to nickel alloy is provided and oxidized in a mildly oxidizing gas of sufficient oxidation potential to oxidize chromium in the alloy structure. Typically, a steam/H.sub.2 gas mixture in a ratio of about 100/1 and at a temperature below 800.degree. C. is used as the oxidizing medium. This method permits the use of less than 5 weight percent chromium in nickel alloy electrodes while obtaining good resistance to creep in the electrodes of a fuel cell stack.

• Research Organization: INTERNATIONAL FUEL CELLS CORP
• DOE Contract Number: AC01-79ET15440
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4714586
• Application Number: 06/823,718
• OSTI ID: 866452
• Country of Publication: United States
• Language: English

Related Subjects

/419/148/
100
800
alloy
alloy electrode
anodes
below
carbonate
carbonate fuel
cell
cell stack
chromium
creep
degree
dimensionally
dimensionally stable
disclosed
electrode
electrode structure
electrodes
fuel
fuel cell
gas
gas mixture
low-chromium
mcfc
medium
method
method permits
mildly
mixture
molten
molten carbonate
nickel
nickel alloy
nickel-chromium
obtaining
oxidation
oxidation potential
oxidize
oxidized
oxidizing
oxidizing gas
particularly
percent
percent chromium
permits
potential
preparing
provided
ratio
resistance
stable
stable electrode
stack
steam
structure
sufficient
temperature
temperature below
typically
weight
weight percent