High temperature fuel cell electrolyte. [molten carbonate electrolyte with alkali metal aluminate carrier]
The specification discloses an improved paste electrolyte composition for use in a high-temperature molten carbonate fuel cell, using substantially pure alkali metal aluminate formed from reactive alumina as the only inert material in the electrolyte. Finely divided reactive alumina substantially completely free of silica is admixed with alkali metal carbonates and fired to remove carbon dioxide to form as final inert carrier material substantially pure inert alkali metal aluminate. The initial composition of the starting mixture is selected so that the final composition is between 40 and 70 percent by weight alkali metal carbonates. In contrast to magnesia supported fuel cells which show a 40 percent drop-off in power output, the aluminate paste electrolyte-utilizing fuel cells of the invention show essentially no deterioration. 1 claim.
- Assignee:
- American Gas Association, Inc.
- Patent Number(s):
- US 4009321
- OSTI ID:
- 7119214
- Resource Relation:
- Patent File Date: Filed date 20 Dec 1972
- Country of Publication:
- United States
- Language:
- English
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Method of preparing a sintered lithium aluminate structure for containing electrolyte
Method of preparing a sintered lithium aluminate structure for containing electrolyte
Related Subjects
HIGH-TEMPERATURE FUEL CELLS
ELECTROLYTES
ALKALI METAL COMPOUNDS
ALUMINATES
CARBONATES
FABRICATION
MOLTEN SALTS
ALUMINIUM COMPOUNDS
CARBON COMPOUNDS
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
FUEL CELLS
OXYGEN COMPOUNDS
SALTS
300503* - Fuel Cells- Materials
Components
& Auxiliaries