Method of making a laminated lithium-ion rechargeable battery cell
AssigneeBell Communications Research, Inc.
InventorsCaroline N. Schmutz, Frough K. Shokoohi, Jean-Marie Tarascon, Paul C. Warren
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Abstract
Li-ion rechargeable battery cell electrode and electrolyte/separator elements formulated as layers of plasticized polymeric matrix compositions are laminated with electrically conductive collector elements to form a unitary battery cell structure. Adhesion between the electrode and collector elements is enhanced by pretreatment of the collector elements in which a 0.25% to 3.0% solution of a polymeric material compatible with said matrix polymer is applied to a collector foil or grid and dried to form a coated film, and the resulting coated collector element is heated within the range of about 250.degree. to 450.degree. C. for about 5 to 60 seconds.
Claims8
A method of making a rechargeable battery structure which comprises arranging contiguously 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 electrode and separator elements comprises a flexible, polymeric matrix film composition,
- b) each of said collector elements comprises a flexible electrically-conductive foil which has been surface treated with a polymeric material compatible with the matrix composition of its contiguous electrode, and
- c) said method further comprises bonding each said element to contiguous elements at its respective interfaces by the application of heat and pressure to form a unitary flexible laminate structure.
Dependencies are inferred from the claim text.