IP Library › Granted Patent US 6,919,142
Granted Patent B2
US 6,919,142 · App. 10/318,683 · Granted Jul 19, 2005

Conducting polymer additives for alkaline electrochemical cell having zinc anode

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Quick Facts
Patent No.
US 6,919,142
App. No.
10/318,683
Granted
Jul 19, 2005
Kind
B2
Abstract

Inclusion of an electronic conducting polymer additive powder in a gelled anode of an alkaline electrochemical cell having an anode active metal material can improve discharge performance of the cell. A preferred conducting polymer powder is polyaniline powder.

Claims (31)

1. A gelled anode mixture comprising:

an anode active material;

an alkaline electrolyte;

a gelling agent; and

an electronic conducting polymer powder in electrical contact with the anode active material, the conducting polymer powder being substantially free of organic solvent residue.

2. A gelled anode mixture as claimed in claim 1 wherein the anode active material comprises zinc.

3. A gelled anode mixture as claimed in claim 1 wherein the anode active material is a zinc alloy powder.

4. A gelled anode mixture as claimed in claim 1 wherein the alkaline electrolyte is potassium hydroxide.

5. A gelled anode mixture comprising:

an anode active material;

an alkaline electrolyte;

a gelling agent;

an electronic conducting polymer powder in electrical contact with the anode active material; the conducting polymer powder being substantially free of organic solvent residue; and

wherein the electronic conducting polymer powder is polyaniline.

6. A gelled anode mixture as claimed in claim 5 wherein the electronic conducting polymer powder is polyaniline provided in the anode at between about 0.0001% and about 5% by weight relative to the anode active material.

7. An alkaline electrochemical cell comprising:

an gelled anode mixture comprising an anode active material; an alkaline electrolyte; a gelling agent; and an electronic conducting polymer powder in electrical contact with the anode active material; the conducting polymer powder being substantially free of organic solvent residue;

a cathode; and

a separator therebetween.

8. An alkaline electrochemical cell as claimed in claim 7 wherein the anode active material comprises zinc.

9. An electrochemical cell as claimed in claim 7 wherein the anode active material is a zinc alloy powder.

10. An electrochemical cell as claimed in claim 7 wherein the alkaline electrolyte is potassium hydroxide.

11. An alkaline electrochemical cell comprising:

an gelled anode mixture comprising an anode active material; an alkaline electrolyte; a gelling agent; and an electronic conducting polymer powder in electrical contact with the anode active material; the conducting polymer powder being substantially free of organic solvent residue;

a cathode; and

a separator therebetween; and

wherein the electronic conducting polymer powder is polyaniline.

12. An alkaline electrochemical cell as claimed in claim 11 wherein the electronic conducting polymer powder is polyaniline provided in the anode at between about 0.0001% and about 5% by weight relative to the anode active material.

13. A method for making a gelled anode, the method comprising the steps of:

dry mixing an anode active material, an electronic conducting polymer powder substantially free of organic solvent residue, and a gelling agent to form a dry mixture;

combining the dry mixture with an alkaline electrolyte to form a gelled anode.

Assignments (11)
PATENT SECURITY AGREEMENT Recorded Dec 30, 2020
From: ENERGIZER BRANDS, LLC; ENERGIZER AUTO, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 054875/0651 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 10, 2019
From: SPECTRUM BRANDS, INC.
To: ENERGIZER BRANDS, LLC
Reel/Frame 049417/0526 →
PATENT SECURITY AGREEMENT Recorded Jan 8, 2019
From: ENERGIZER HOLDINGS, INC.; AMERICAN COVERS, LLC; ASSOCIATED PRODUCTS, LLC; CALIFORNIA SCENTS, LLC; ENERGIZER BRANDS, LLC; ENERGIZER MANUFACTURING, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 048029/0246 →
RELEASE OF SECURITY INTEREST Recorded Jan 3, 2019
From: ROYAL BANK OF CANADA
To: SPECTRUM BRANDS, INC.
Reel/Frame 049627/0139 →
NOTICE OF SUCCESSOR AGENT AND ASSIGNMENT OF SECURITY INTEREST (INTELLECTUAL PROPERTY) REEL/FRAME 036131/0272 Recorded Jun 5, 2018
From: DEUTSCHE BANK AG NEW YORK BRANCH
To: ROYAL BANK OF CANADA
Reel/Frame 046301/0425 →
SECURITY INTEREST Recorded Jul 20, 2015
From: SPECTRUM BRANDS, INC.
To: DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT
Reel/Frame 036131/0272 →
RELEASE OF SECURITY INTEREST Recorded Jul 14, 2015
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL TRUSTEE
To: APPLICA CONSUMER PRODUCTS, INC.; APPLICA CONSUMER PRODUCTS, INC., A CORP. OF FLORIDA; KWIKSET CORPORATION; LIQUID HOLDING COMPANY, INC.; NATIONAL MANUFACTURING CO.; PRICE PFISTER, INC.; ROV HOLDING, INC., A CORP. OF DELAWARE; ROVCAL, INC.; ROVCAL, INC., A CORP. OF CALIFORNIA; RUSSELL HOBBS, INC., A CORP. OF DELAWARE; SALIX ANIMAL HEALTH, LLC; SEED RESOURCES, L.L.C.; SPECTRUM BRANDS, INC.; SPECTRUM BRANDS, INC. AS SUCCESSOR IN INTEREST TO ROVCAL, INC.; SPECTRUM BRANDS, INC., A CORP. OF DELAWARE; TELL MANUFACTURING, INC.; TETRA HOLDING (US), INC., A CORP. OF DELAWARE; TETRA HOLDINGS (US), INC.; UNITED INDUSTRIES CORPORATION; UNITED INDUSTRIES CORPORATION AS SUCCESSOR IN INTEREST TO LIQUID HOLDING COMPANY, INC.; UNITED PET GROUP, INC.; UNITED PET GROUP, INC., A CORP. OF DELAWARE
Reel/Frame 036102/0001 →
MERGER Recorded Nov 10, 2014
From: ROVCAL, INC.
To: SPECTRUM BRANDS, INC.
Reel/Frame 034136/0718 →
PATENT SECURITY AGREEMENT Recorded Dec 28, 2012
From: SPECTRUM BRANDS, INC.; UNITED INDUSTRIES CORPORATION; UNITED PET GROUP, INC.; APPLICA CONSUMER PRODUCTS, INC.; ROVCAL, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION
Reel/Frame 029536/0634 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 14, 2009
From: GOLDMAN SACHS CREDIT PARTNERS L.P.
To: THE BANK OF NEW YORK MELLON, AS COLLATERAL AGENT
Reel/Frame 022951/0236 →
SECURITY AGREEMENT Recorded Jun 27, 2007
From: AQUARIA, INC.; AQUARIUM SYSTEMS, INC.; UNITED PET GROUP, INC.; SPECTRUM BRANDS, INC. (FORMERLY KNOWN AS RAYOVAC CORPORATION); ROVCAL, INC.; SOUTHERN CALIFORNIA FOAM, INC.; TETRA HOLDING (US), INC.; UNITED INDUSTRIES CORPORATION
To: GOLDMAN SACHS CREDIT PARTNERS L.P., AS COLLATERAL AGENT
Reel/Frame 019477/0974 →