Electrochemical secondary cell using lithium and a liquid organic electrolyte
AssigneeAlcatel Alsthom Compagnie Generale d'Electricite
InventorXavier Andrieu
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Abstract
An electrochemical secondary cell using lithium and a liquid organic electrolyte, the cell being of the cylindrical or prismatic type, wherein its separator comprises a microporous film of polyolefin next to the lithium anode and a film of cross-linked polymer that swells in the electrolyte and which applies pressure against the electrodes. The cross-linked polymer may be an ion conducting polymer including a polyether with two terminal amine functions.
Claims10
An electrochemical secondary cell having a liquid organic electrolyte, the cell being of the prismatic or cylindrical type, including at least one lithium electrode, a microporous film of polyolefin, and a positive electrode, the cell including a film of cross-linked polymer situated adjacent to said positive electrode, said polymer film being molded and cross-linked before assembly of the cell components, said cross-linked polymer being selected from the group consisting of cross-linked ion-conducting polymers, and said cross-linked polymer being capable of swelling in said electrolyte so as to exert pressure on the at least one lithium electrode.
Dependencies are inferred from the claim text.