Electrolyte activatable lithium-ion rechargeable battery cell and method of making same

Abstract From the Canadian patent

Li-ion rechargeable battery cell electrode (13 17) and electrolyte/separator (15) elements formulated as layers of plasticized polymeric matrix compositions are laminated to form a unitary battery cell structure. The structure may be stored indefinitely since it is essentially, devoid of electrolyte solution which typically comprises a moisture-sensitive lithium salt. Prior to the battery's being put into service the, plasticizer of the polymeric composition is removed by extracting with a selective solvent and is replaced with a lithium salt electrolyte solution by simple imbibition. The battery thus activated may then be charged and recharged in the usual manner.