Solid state cells

• US 4,207,389 A
• Filed: 10/30/1978
• Issued: 06/10/1980
• Est. Priority Date: 11/25/1977
• Status: Expired due to Term

• Current Assignee: P R Mallory & Company Incorporated (Tupperware Brands Corporation)
• Original Assignee: P R Mallory & Company Incorporated (Tupperware Brands Corporation)
• Inventors: Nikitopoulos, Robert, Gunther, Philip B.
• Primary Examiner(s): LeFevour, Charles F.
• Application Number:
  US05/956,478
• Time in Patent Office: 589 Days
• Field of Search: 429/191, 429/199, 429/225, 429/164
• US Class Current: 429/164
• CPC Class Codes: H01M 4/08 Processes of manufacture
• CPC Class Codes: H01M 4/58 of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
• CPC Class Codes: H01M 6/188 Processes of manufacture

Abstract

The manufacture of solid state cells with smearable cathode materials subject to radial expansion during cell discharge is improved by the consolidation of such materials within a radially rigid non-flexible wall-retaining member which serves as a jig for the cathode during the fabrication of the cell, and which is thereafter retained in the cell structure to control such radial expansion.

Claims

1. A solid state electrochemical cell comprising a solid anode, a solid cathode and, a solid electrolyte therebetween in a container and a rigid non-flexible wall retaining member between said container and said cathode which completely surrounds and directly retains the lateral walls of said cathode wherein said cathode is subject to radial expansion during discharge of said cell, and said cathode having been pressure consolidated within said wall retaining member whereby radial expansion of said cathode is substantially contained thereby.

2. The solid state cell of claim 1 wherein said anode is lithium.

3. The solid state cell of claim 2 wherein said electrolyte is comprised of a lithium halide.

4. The solid state cell of claim 3 wherein said solid cathode subject to radial expansion contains a material selected from the group consisting of lead sulfide, lead iodide, and mixtures thereof.

5. The solid state cell of claim 4 wherein said member is in the shape of a cup.

6. The solid state cell of claim 5 wherein said cup is partially open at its bottom with a concentrically circular cutout.

7. The solid state cell of claim 6 wherein said partially opened bottom cup is comprised of stainless steel.

8. The solid state cell of claim 7 wherein said cup directly retains all of the lateral walls of said cathode and part of said electrolyte.