# US 2014/0154569 A1 · Conductive adhesive composition for electrochemical element electrode, collector with adhesive layer, and electrochemical element electrode

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0154569 A1
- Document ID: US20140154569A1
- Status: Published application
- Kind: A1
- Application number: 14/236,491
- Filed: 2012-08-03
- Published: 2014-06-05
- Earliest claimed: 2011-08-03
- Assignees: Zeon Corporation
- Inventors: Koichiro Maeda; Naoki Yoshida
- Web page: https://patentgrep.com/patent/US20140154569A1

## CPC

- H01M 4/663: {containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres}
- H01G 11/22: Electrodes
- H01G 11/66: Current collectors
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/667: {in the form of layers, e.g. coatings}
- H01M 4/668: {Composites of electroconductive material and synthetic resins}
- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

To provide a conductive adhesive composition for an electrochemical element electrode and used in forming a conductive adhesive layer that is highly uniform and is interposed between a collector and an electrode composition layer, being able to contribute to increased adhesion between the two. The conductive adhesive composition for an electrochemical element electrode is characterized by containing: conductive carbon; a particulate copolymer (A) containing a dibasic acid monomer unit; a particulate copolymer (B) containing an ethylenically unsaturated carboxylic acid amide derivative unit; and a dispersing agent.

## Claims

### Claim 1

A conductive adhesive composition for electrochemical element electrode comprising a conductive carbon, a particulate copolymer (A) including dibasic acid monomer unit, a particulate copolymer (B) including ethylenic unsaturated carboxylic acid amide derivative unit, and a dispersing medium.

### Claim 2 (depends on 1)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 1, wherein said particulate copolymer (A) is;
a particulate copolymer (A-I) obtained by an emulsion polymerization of a monomer mixture including 60 to 90 wt % of ethylenic unsaturated carboxylic acid ester, 0.1 to 5 wt % of dibasic acid monomer, and 39.9 to 5 wt % of monoolefinic monomer copolymerizable therewith; and/or,
a particulate copolymer (A-II) obtained by emulsion polymerization of a monomer mixture including 20 to 50 wt % of diene based monomer, 0.1 to 5 wt % of dibasic acid monomer, and 79.9 to 50 wt % of monoolefinic monomer copolymerizable therewith.

### Claim 3 (depends on 1)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 1, wherein said particulate copolymer (B) is a particulate copolymer obtained by an emulsion polymerization of a monomer mixture including 1 to 5 wt % of ethylenic unsaturated carboxylic acid monomer, 0.1 to 3 wt % of ethylenic unsaturated carboxylic acid amide derivative, and 35 to 90 wt % of monoolefinic monomer copolymerizable therewith.

### Claim 4 (depends on 1)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 1, wherein a content ratio of the conductive carbon is 8 to 38 wt %, the content ratio of the particulate copolymer (A) is 1 to 4 wt %, the content ratio of the particulate copolymer (B) is 0.1 to 1 wt %, and the content ratio of the dispersing medium is 60 to 90 wt %.

### Claim 5 (depends on 1)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 1 comprising 0.01 to 1.0 wt % of isothiazoline based compound with respect to the conductive carbon.

### Claim 6 (depends on 1)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 1, wherein a volume average particle diameter of said particulate copolymer (A) is 200 to 500 nm.

### Claim 7 (depends on 1)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 1 wherein a volume average particle diameter of said particulate copolymer (B) is 80 to 250 nm.

### Claim 8 (depends on 1)

A collector with an adhesive layer comprising a conductive adhesive layer obtained by coating and drying the conductive adhesive composition for the electrochemical element electrode as set forth in claim 1 on a collector.

### Claim 9

A collector having an adhesive layer comprising a conductive adhesive layer comprising a conductive carbon, a particulate copolymer (A) including dibasic acid monomer unit, and a particulate copolymer (B) including ethylenic unsaturated carboxylic acid amide derivative monomer unit on the collector.

### Claim 10 (depends on 8)

The collector having the adhesive layer as set forth in claim 8 wherein a thickness of said conductive adhesive layer is 0.5 to 5 μm.

### Claim 11 (depends on 8)

An electrochemical element electrode comprising an electrode composition layer including an electrode active material on the conductive adhesive layer of the collector having the adhesive layer as set forth in claim 8.

### Claim 12 (depends on 2)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 2, wherein said particulate copolymer (B) is a particulate copolymer obtained by an emulsion polymerization of a monomer mixture including 1 to 5 wt % of ethylenic unsaturated carboxylic acid monomer, 0.1 to 3 wt % of ethylenic unsaturated carboxylic acid amide derivative, and 35 to 90 wt % of monoolefinic monomer copolymerizable therewith.

### Claim 13 (depends on 2)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 2, wherein a content ratio of the conductive carbon is 8 to 38 wt %, the content ratio of the particulate copolymer (A) is 1 to 4 wt %, the content ratio of the particulate copolymer (B) is 0.1 to 1 wt %, and the content ratio of the dispersing medium is 60 to 90 wt %.

### Claim 14 (depends on 3)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 3, wherein a content ratio of the conductive carbon is 8 to 38 wt %, the content ratio of the particulate copolymer (A) is 1 to 4 wt %, the content ratio of the particulate copolymer (B) is 0.1 to 1 wt %, and the content ratio of the dispersing medium is 60 to 90 wt %.

### Claim 15 (depends on 2)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 2 comprising 0.01 to 1.0 wt % of isothiazoline based compound with respect to the conductive carbon.

### Claim 16 (depends on 3)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 3 comprising 0.01 to 1.0 wt % of isothiazoline based compound with respect to the conductive carbon.

### Claim 17 (depends on 4)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 4 comprising 0.01 to 1.0 wt % of isothiazoline based compound with respect to the conductive carbon.

### Claim 18 (depends on 2)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 2, wherein a volume average particle diameter of said particulate copolymer (A) is 200 to 500 nm.

### Claim 19 (depends on 3)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 3, wherein a volume average particle diameter of said particulate copolymer (A) is 200 to 500 nm.

### Claim 20 (depends on 4)

The conductive adhesive composition for the electrochemical element electrode as set forth in claim 4, wherein a volume average particle diameter of said particulate copolymer (A) is 200 to 500 nm.