Method of making lithium batteries with laminar anodes

• US 4,502,903 A
• Filed: 06/04/1984
• Issued: 03/05/1985
• Est. Priority Date: 01/20/1982
• Status: Expired due to Fees

• Current Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Original Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Inventors: Bruder, Alan H.
• Primary Examiner(s): DAWSON, ROBERT A
• Application Number:
  US06/616,897
• Time in Patent Office: 274 Days
• Field of Search: 29/623.3, 29/738, 156/153, 156/244.11, 156/324, 428/461, 429/152, 429/162, 429/194, 429/197, 429/206, 429/218
• US Class Current: 156/153
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 15/082 comprising vinyl resins; comprising acrylic resins
• CPC Class Codes: B32B 15/085 comprising polyolefins
• CPC Class Codes: B32B 2264/108 Carbon, e.g. graphite particles
• CPC Class Codes: B32B 2307/202 Conductive
• CPC Class Codes: B32B 2309/022 Temperature vs pressure profiles
• CPC Class Codes: B32B 2457/10 Batteries
• CPC Class Codes: B32B 37/06 characterised by the heating method
• CPC Class Codes: B32B 37/20 involving the assembly of continuous webs only
• CPC Class Codes: H01M 4/12 of consumable metal or alloy electrodes use of alloy compositions as active materials H01M4/38
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 4/668 Composites of electroconductive material and synthetic resins
• CPC Class Codes: H01M 6/16 with organic electrolyte H01M6/18 takes precedence
• CPC Class Codes: Y10T 29/49112 including laminating of indefinite length material
• CPC Class Codes: Y10T 428/31692 Next to addition polymer from unsaturated monomers

Abstract

Laminar electrode subassemblies comprising a lithium layer having one surface consisting essentially of metallic lithium adhered to a conductive plastic substrate, and a method of making such subassemblies in which a web of lithium foil having at least one freshly exposed surface is laminated directly to a conductive plastic substrate without an intermediate layer of conductive plastic adhesive.

Claims

1. The method of making a laminate of lithium and conductive plastic, comprising the steps of manipulating a body of lithium metal to expose a fresh surface of unreacted lithium metal, and contacting said freshly exposed surface directly with a sheet of conductive plastic to effect adhesion between said lithium and said conductive plastic without an intermediate adhesive promoting adjunct, said contacting step being carried out under pressure and heat at a temperature below the melting point of lithium.

2. The method of claim 1, in which said conductive plastic is a copolymer of ethylene and vinyl acetate containing carbon particles.

3. The process of making lithium anodes, comprising the steps of extruding metallic lithium through a die to produce a thin sheet of lithium having freshly exposed surfaces consisting essentially of unreacted metallic lithium, and laminating said lithium sheet directly to a sheet of conductive plastic under heat and pressure without an intermediate adhesion promoting adjunct, said extrusion and laminating steps being carried out at temperatures below the melting point of lithium.

4. The process of claim 3 wherein said conductive plastic is a copolymer of ethylene and vinyl acetate containing carbon particles.