Air electrode material for high temperature electrochemical cells
Disclosed is a solid solution with a perovskite-like crystal structure having the general formula La /SUB 1-x-w/ (M /SUB L/ ) /SUB x/ (Ce) /SUB w/ (M /SUB S1/ ) /SUB 1-y/ (M /SUB S2/ ) /SUB y/ O/sub 3/ where M /SUB l/ is Ca, Sr, Ba, or mixtures thereof, M /SUB S1/ is Mn, Cr, or mixtures thereof and M /SUB S2/ is Ni, Fe, Co, Ti, Al, In, Sn, Mg, Y, Nb, Ta, or mixtures thereof, w is about 0.05 to about 0.25, x+w is about 0.1 to about 0.7, and y is 0 to about 0.5. In the formula, M /SUB L/ is preferably Ca, w is preferably 0.1 to 0.2, x+w is preferably 0.4 to 0.7, and y is preferably 0. The solid solution can be used in an electrochemical cell where it more closely matches the thermal expansion characteristics of the support tube and electrolyte of the cell.
- Assignee:
- Westinghouse Electric Corp.
- Patent Number(s):
- US 4562124
- OSTI ID:
- 5690028
- Country of Publication:
- United States
- Language:
- English
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300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CHEMICAL COMPOSITION
CHROMIUM COMPOUNDS
DIRECT ENERGY CONVERTERS
DISPERSIONS
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYTES
EXPANSION
FUEL CELLS
LANTHANUM COMPOUNDS
MANGANESE COMPOUNDS
MIXTURES
PEROVSKITES
QUANTITY RATIO
RARE EARTH COMPOUNDS
SOLID SOLUTIONS
SOLUTIONS
STRONTIUM COMPOUNDS
THERMAL EXPANSION
TRANSITION ELEMENT COMPOUNDS