Laminar cells and methods for making the same

• US 4,125,686 A
• Filed: 06/30/1977
• Issued: 11/14/1978
• Est. Priority Date: 06/30/1977
• Status: Expired due to Term

• Current Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Original Assignee: Polaroid Corporation (PLR IP Holdings LLC)
• Inventors: Kinsman, Gordon F.
• Primary Examiner(s): Skapars, Anthony
• Application Number:
  US05/811,470
• Time in Patent Office: 502 Days
• Field of Search: 429/162, 429/152, 429/149, 429/153, 429/156, 429/160, 429/122, 429/154
• US Class Current: 429/152
• CPC Class Codes: H01M 4/663 containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
• CPC Class Codes: H01M 4/668 Composites of electroconductive material and synthetic resins
• CPC Class Codes: H01M 6/12 with flat electrodes
• CPC Class Codes: H01M 6/48 with bipolar electrodes

Abstract

The method of making a laminar battery including the steps of contacting the cellophane side of a laminate of cellophane and zinc powder adhered to the cellophane with a polymeric binder with a cathode slurry of carbon and manganese dioxide in an aqueous solution of electrolytes, coating the zinc side of the laminate with a carbon slurry, and contacting the carbon slurry with a conductive plastic current collector, and cells and batteries made by this process.

Claims

1. In an electrical cell, the combination comprising a thin sheet of ion permeable separator material;

a first electrolyte permeable layer of active electrode particles held together with a polymeric binder on said separator sheet;

said first layer having aqueous electrolyte distributed therein;

a layer comprising a dispersion of carbon particles in aqueous electrolyte on said first layer, and a conductive plastic sheet over and in contact with said second layer.

2. In an electrical cell, the combination comprising a thin separator sheet of regenerated cellulose, a first electrolyte permeable layer of active electrode particles held together with a polymeric binder on said separator sheet, said first layer having aqueous electrolyte distributed therein, a layer comprising a dispersion of carbon particles in aqueous electrolyte carried on said first layer, and a conductive plastic sheet over and in contact with said second layer.