High temperature fuel cell electrolyte

Details High temperature fuel cell electrolyte High temperature fuel cell electrolyte

1972-12-20

1977-02-22

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Having earth feature

H01M 814

Patent

active

040093212

ABSTRACT:
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% by weight alkali metal carbonates. In contrast to magnesia supported fuel cells which show a 40% drop-off in power output, the aluminate paste electrolyte-utilizing fuel cells of the invention show essentially no deterioration.

REFERENCES:
patent: 2276188 (1942-03-01), Greger
patent: 3257239 (1966-06-01), Shultz et al.
Broers et al., Fuel Cells by Young, Published by Reinhold Publishing Corp., 1963, pp. 6-11.

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