Lithium batteries with laminar anodes

• US 4,621,035 A
• Filed: 01/20/1982
• Issued: 11/04/1986
• Est. Priority Date: 01/20/1982
• Status: Expired due to Term

• Current Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Original Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Inventors: Bruder, Alan H.
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/341,197
• Time in Patent Office: 1,749 Days
• Field of Search: 429/152, 429/162, 429/194, 429/197
• US Class Current: 429/152
• CPC Class Codes: B32B 15/08 of synthetic resin
• 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: H01M 6/48 with bipolar electrodes

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. A laminar electrical cell, comprising an anode, a cathode, and an electrolyte permeable separator beween said anode and said cathode, said anode consisting essentially of a layer of lithium having at least one surface of unreacted lithium metal in direct contact with and adhered to a layer of conductive plastic with no intermediate adhesive promoting adjuncts, and said cathode comprising a slurry of MnO₂ and carbon particles in a solution of a lithium salt in an organic solvent, said solution permeating said separator and being in contact with said lithium.

2. In a lithium battery, an anode consisting essentially of a thin sheet of lithium having at least one surface of unreacted lithium metal in direct contact with and adhering to a thin sheet of conductive plastic with no intermediate adhesive promoting adjuncts.

3. A lithium battery, comprising an anode consisting essentially of a thin sheet of lithium having at least one surface of unreacted lithium metal adhered to a thin sheet of conductive plastic with no intermediate adhesive promoting adjuncts, a cathode consisting essentially of a wet anhydrous slurry of Mno₂ and carbon particles in a solution of a lithium slat in an organic solvent, and a separator permeated by said solvent between said cathode and said anode.

4. The battery of claim 3, in which said lithium salt is LiAsF₆, and in which said organic solvent consists essentially of from 30 to 100 parts by weight of propylene carbonate and from 0 to 70 parts by weight of 1,2 dimethoxyethane.

5. In a lithium battery, an anode consisting essentially of a layer of lithium having a first major surface and a second major surface opposite said first surface in direct contact with and adhered to a layer of a dispersion of carbon particles in a copolymer of ethylene and vinyl acetate with no intermediate adhesive promoting adjuncts, said second surface consisting essentially of unreacted lithium metal.