Method of preparing electrolyte for use in fuel cells

Details Method of preparing electrolyte for use in fuel cells Method of preparing electrolyte for use in fuel cells

H - Electricity

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319/13

H01M 8/10 (2006.01) C01F 7/04 (2006.01) H01M 8/02 (2006.01) H01M 8/14 (2006.01)

Patent

CA 1086377

ABSTRACT OF THE DISCLOSURE An electrolyte compact for fuel cells includes a particu- late support material of lithium aluminate that contains a mixture of alkali metal compounds, such as carbonates or hydrox- ides, as the active electrolyte material. The porous lithium aluminate support structure is formed by mixing alumina particles with a solution of lithium hydroxide and another alkali metal hydroxide, evaporating the solvent from the solution and heating to a temperature sufficient to react the lithium hydroxide with alumina to form lithium aluminate. Carbonates are formed by reacting the alkali metal hydroxides with carbon dioxide gas in an exothermic reaction which may proceed simultaneously with the formation with the lithium aluminate. The mixture of lithium aluminate and alkali metal in an electrolyte active material is pressed or otherwise processed to form the electrolyte structure for assembly into a fuel cell.

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