Corrosion resistant positive electrode for high-temperature, secondary electrochemical cell
- Chicago, IL
- South Holland, IL
- Lemont, IL
- Oak Forest, IL
The corrosion rate of low carbon steel within a positive electrode of a high-temperature, secondary electrochemical cell that includes FeS as active material is substantially reduced by incorporating therein finely divided iron powder in stoichiometric excess to the amount required to form FeS in the fully charged electrode. The cell typically includes an alkali metal or alkaline earth metal as negative electrode active material and a molten metal halide salt as electrolyte. The excess iron permits use of inexpensive carbon steel alloys that are substantially free of the costly corrosion resistant elements chromium, nickel and molybdenum while avoiding shorten cell life resulting from high corrosion rates.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4401714
- OSTI ID:
- 864687
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
resistant
positive
electrode
high-temperature
secondary
electrochemical
cell
rate
carbon
steel
fes
active
material
substantially
reduced
incorporating
therein
finely
divided
iron
powder
stoichiometric
excess
amount
required
form
charged
typically
alkali
metal
alkaline
earth
negative
molten
halide
salt
electrolyte
permits
inexpensive
alloys
free
costly
elements
chromium
nickel
molybdenum
avoiding
shorten
life
resulting
rates
steel alloy
iron powder
corrosion rate
substantially reduced
secondary electrochemical
corrosion resistant
substantially free
positive electrode
negative electrode
active material
molten metal
alkali metal
electrochemical cell
alkaline earth
metal halide
earth metal
finely divided
substantially reduce
carbon steel
steel alloys
halide salt
amount required
stoichiometric excess
electrode active
charged electrode
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