Thin flexible electrodes and the method for producing them

• US 4,195,121 A
• Filed: 03/28/1978
• Issued: 03/25/1980
• Est. Priority Date: 03/28/1978
• Status: Expired due to Term

• Current Assignee: Eveready Battery Company Incorporated (Energizer Holdings, Inc.)
• Original Assignee: Union Carbide Corporation (Dow, Inc.)
• Inventors: Peterson, Gordon E.
• Primary Examiner(s): Walton, Donald L.
• Application Number:
  US05/890,974
• Time in Patent Office: 728 Days
• Field of Search: 429/206, 429/217, 429/212, 429/213, 429/214, 429/245, 429/127, 252/182.1, 264/104, 526/317
• US Class Current: 429/127
• CPC Class Codes: H01M 4/02 Electrodes composed of, or comprising, active material
• CPC Class Codes: H01M 4/54 of silver
• CPC Class Codes: H01M 4/621 Binders
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A method for producing thin, flexible electrodes for flexible cells and the electrodes so produced comprising an active material and a minor amount of an ethylene acrylic acid polymer.

Claims

1. A method for producing a thin, flexible electrode comprising the steps:

(a) blending together an active material powder with a minor amount of an ethylene acrylic acid polymer powder to form a dry electrode mix; and

(b) compressing the dry electrode mix with a pressure between about 500 and about 10,000 pounds per square inch and heating it to a temperature of between about 60°

C. and about 93°

C. to form a thin, flexible electrode stock.

2. The method of claim 1 wherein the electrode mix is a cathode mix and in step (a) the active material powder is selected from the group consisting of manganese dioxide, silver oxide (monovalent and/or divalent), mercury oxide, copper oxide, iron sulfide, nickel oxide, nickel hydroxide and mixtures thereof.

3. The method of claim 1 wherein the electrode mix is an anode mix and in step (a) the active material powder is selected from the group consisting of zinc, lead, aluminum, magnesium, cadmium and mixtures thereof.

4. The method of claim 1 wherein the ethylene acrylic acid polymer powder in step (a) is in an amount of between about 0.5 and about 15 weight percent based on the weight of the dry constituents of the electrode mix.

5. A thin, flexible electrode made in accordance with the method of claim 1.