# US 2019/0379033 A1 · Method for Manufacturing Electrode for Secondary Battery Suitable for High Loading

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- Number: US 2019/0379033 A1
- Document ID: US20190379033A1
- Status: Published application
- Kind: A1
- Application number: 16/341,573
- Filed: 2018-02-06
- Published: 2019-12-12
- Earliest claimed: 2017-03-02
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Young Hwan Lee
- Web page: https://patentgrep.com/patent/US20190379033A1

## CPC

- H01M 4/04: Processes of manufacture in general
- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/139: Processes of manufacture
- H01M 4/1391: of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Methods for preparing an electrode for a secondary battery are provided herein. In some embodiments, the method includes coating a current collector with an electrode slurry to form a coating layer on the current collector, the electrode slurry including a binder, an electrode active material, a conductive material, and amorphous selenium nanoparticles, and a solvent; and drying the coating layer, wherein the drying vaporizes the amorphous selenium nanoparticles and forms a passageway in the coating layer.

## Claims

### Claim 1

A method for preparing an electrode for a secondary battery, comprising:
coating a current collector with an electrode slurry to form a coating layer on the current collector, the electrode slurry including a binder, an electrode active material, a conductive material, and amorphous selenium nanoparticles, and a solvent; and
drying the coating layer to vaporize the amorphous selenium nanoparticles and form a passageway in the coating layer.

### Claim 2 (depends on 1)

The method for preparing an electrode for a secondary battery of claim 1, wherein a size of the amorphous selenium nanoparticles is in a range of 500 nm to 1000 nm.

### Claim 3 (depends on 1)

The method for preparing an electrode for a secondary battery of claim 1, wherein the coating layer is dried at 90 to 110° C.

### Claim 4

(canceled)

### Claim 5 (depends on 1)

An electrode for a secondary battery manufactured by claim 1.

### Claim 6 (depends on 5)

A secondary battery comprising the electrode according to claim 5.

### Claim 7 (depends on 6)

The secondary battery of claim 6, wherein the battery is any one selected from a lithium ion battery, a lithium polymer battery, and a lithium ion polymer battery.

### Claim 8 (depends on 7)

A battery pack comprising at least one secondary battery according to claim 7.

### Claim 9 (depends on 8)

A device comprising the battery pack according to claim 8 as a power source.

### Claim 10 (depends on 9)

The device of claim 9, wherein the device includes any one selected from a mobile phone, a portable computer, a smartphone, a smart pad, a netbook, a wearable electronic device, a light electronic vehicle (LEV), an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a power storage device.