# US 2019/0355984 A1 · Electrochemical device

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- Number: US 2019/0355984 A1
- Document ID: US20190355984A1
- Status: Published application
- Kind: A1
- Application number: 16/476,100
- Filed: 2018-01-25
- Published: 2019-11-21
- Earliest claimed: 2017-01-31
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: TAKUMI YAMAGUCHI; NAO MATSUMURA
- Web page: https://patentgrep.com/patent/US20190355984A1

## CPC

- H01M 4/366: {as layered products}
- H01G 11/28: arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
- H01G 11/32: Carbon-based
- H01G 11/48: Conductive polymers
- H01G 11/52: Separators
- H01G 11/68: characterised by their material
- H01M 4/137: Electrodes based on electro-active polymers
- H01M 4/587: for inserting or intercalating light metals
- H01M 4/60: of organic compounds
- H01M 4/602: {Polymers}
- H01M 4/625: {Carbon or graphite}
- H01M 4/66: Selection of materials
- H01M 4/661: {Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence)}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 2004/028: {Positive electrodes}
- 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

An electrochemical device includes a positive electrode, a negative electrode, and a separator disposed between these electrodes. The positive electrode includes a positive current collector containing a first metal, a carbon layer containing a conductive carbon material, a barrier layer disposed between the positive current collector and the carbon layer, and an active layer disposed on the carbon layer. The barrier layer has conductivity and higher acid resistance than the positive current collector. The active layer contains a conductive polymer. The first metal is preferably aluminum.

## Claims

### Claim 1

An electrochemical device comprising:
a positive electrode;
a negative electrode; and
a separator disposed between the positive electrode and the negative electrode,
wherein the positive electrode includes:
a positive current collector containing a first metal,
a carbon layer containing a conductive carbon material,
a barrier layer disposed between the positive current collector and the carbon layer, the barrier layer having conductivity and higher acid resistance than the positive current collector, and
an active layer disposed on the carbon layer, the active layer containing a conductive polymer.

### Claim 2 (depends on 1)

The electrochemical device according to claim 1, wherein the first metal is aluminum.

### Claim 3 (depends on 1)

The electrochemical device according to claim 1, wherein the barrier layer contains a compound of the first metal and at least one of carbon and nitrogen.

### Claim 4 (depends on 1)

The electrochemical device according to claim 1, wherein the barrier layer contains a compound of a second metal and at least one of carbon and nitrogen, the second metal being different from the first metal.

### Claim 5 (depends on 1)

The electrochemical device according to claim 1, wherein the barrier layer contains a third metal having lower ionization tendency than the first metal.

### Claim 6 (depends on 5)

The electrochemical device according to claim 5, wherein the third metal contains at least one of nickel and titanium.