Method of making an electrolyte activatable lithium-ion rechargeable battery cell
First Claim
1. A method of making a rechargeable battery structure which comprises arranging, in sequence, a positive electrode element, a separator element, and a negative electrode element characterized in thata) each of said electrode and separator elements comprises a flexible, polymeric matrix composition substantially devoid of electrolyte salt, andb) said method further comprises bonding each said element to contiguous elements at its respective interface to form a unitary flexible laminate structure.
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Accused Products
Abstract
Li-ion rechargeable battery cell electrode and electrolyte/separator 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, at least a portion of the compatible polymeric composition plasticizer is displaced by contact with a lithium salt electrolyte solution or is removed by extraction with a selective solvent and replaced with the electrolyte solution by simple imbibition. The battery thus activated may then be charged and recharged in the usual manner.
186 Citations
23 Claims
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1. A method of making a rechargeable battery structure which comprises arranging, in sequence, a positive electrode element, a separator element, and a negative electrode element characterized in that
a) each of said electrode and separator elements comprises a flexible, polymeric matrix composition substantially devoid of electrolyte salt, and b) said method further comprises bonding each said element to contiguous elements at its respective interface to form a unitary flexible laminate structure.
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8. A method of making a rechargeable battery structure which comprises arranging, in sequence, a positive current collector element, a positive electrode element, a separator element, a negative electrode element, and a negative current collector element characterized in that
a) each of said collector elements comprises a flexible electrically-conductive foil, b) each of said electrode and separator elements comprises a flexible, polymeric matrix composition substantially devoid of electrolyte salt, and c) said method further comprises bonding each said element to contiguous elements at its respective interface to form a unitary flexible laminate structure.
Specification