# US 2023/0411601 A1 · Method of Coating Solid Electrolyte of Solid-State Battery and Method of Manufacturing Electrode of Solid-State Battery Using the Same

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- Number: US 2023/0411601 A1
- Document ID: US20230411601A1
- Status: Published application
- Kind: A1
- Application number: 18/081,393
- Filed: 2022-12-14
- Published: 2023-12-21
- Earliest claimed: 2022-06-08
- Assignees: Hyundai Motor Company; Kia Corporation
- Applicants: Hyundai Motor Company; Kia Corporation
- Inventors: Sun Ho Choi; Yong Jun Jang; In Woo Song; Sang Heon Lee; So Young Kim; Seong Hyeon Choi; Mun Seok Chae; Ho Cheol Shin; Sa Heum Kim; Sang Soo Lee
- Web page: https://patentgrep.com/patent/US20230411601A1

## CPC

- H01M 4/366: {as layered products}
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/139: Processes of manufacture
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 10/052: Li-accumulators
- H01M 10/0562: Solid materials
- H01M 2300/0068: inorganic
- H01M 2300/008: Halides
- 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

Disclosed is a method of coating a solid electrolyte of a solid-state battery. The method includes putting an electrode active material and a sulfide-based solid electrolyte into a rotating mixer, operating the rotating mixer to rotate in a first direction while the rotating mixer revolves in a second direction, and coating a surface of the electrode active material with the sulfide-based solid electrolyte in the rotating mixer during the operation of the rotating mixer, to form a solid electrolyte layer on the surface of the electrode active material.

## Claims

### Claim 1

A method of coating a solid electrolyte of a solid-state battery, the method comprising:
putting an electrode active material and a sulfide-based solid electrolyte into a rotating mixer;
operating the rotating mixer to rotate in a first direction while the rotating mixer revolves in a second direction; and
coating a surface of the electrode active material with the sulfide-based solid electrolyte in the rotating mixer during the operating the rotating mixer, to form a solid electrolyte layer on the surface of the electrode active material.

### Claim 2 (depends on 1)

The method of claim 1, wherein the first direction is an opposite direction to the second direction.

### Claim 3 (depends on 1)

The method of claim 1, wherein a centrifugal acceleration of the rotating mixer generated by the operating the rotating mixer is about 200 g to about 460 g.

### Claim 4 (depends on 1)

The method of claim 1, wherein, in putting the electrode active material and the sulfide-based solid electrolyte into the rotating mixer, about 1 to about 10 parts by weight of the sulfide-based solid electrolyte is put into the rotating mixer per about 100 parts by weight of the electrode active material.

### Claim 5 (depends on 1)

The method of claim 1, wherein the sulfide-based solid electrolyte is:
a mixture comprising two or more selected from the group consisting of lithium (Li), phosphorus (P), sulfur (S), and halogen elements; or
a compound comprising two or more selected from the group consisting of lithium (Li), phosphorus (P), sulfur (S), and halogen elements.

### Claim 6 (depends on 1)

The method of claim 1, wherein the electrode active material has a strength of about 100 MPa to about 300 MPa.

### Claim 7

A method of manufacturing an electrode of a solid-state battery, the method comprising:
putting an electrode active material and a sulfide-based solid electrolyte into a rotating mixer;
operating the rotating mixer to rotate in a first direction while the rotating mixer revolves in a second direction;
coating a surface of the electrode active material with the sulfide-based solid electrolyte in the rotating mixer during the operating the rotating mixer, to form a solid electrolyte layer on the surface of the electrode active material;
preparing an electrode slurry by additionally putting a solvent, a sulfide-based solid electrolyte, a conductive material, and a binder into the rotating mixer; and
manufacturing the electrode by coating an electrode current collector with the electrode slurry.

### Claim 8 (depends on 7)

The method of claim 7, wherein the first direction is an opposite direction to the second direction.

### Claim 9 (depends on 7)

The method of claim 7, wherein a centrifugal acceleration of the rotating mixer generated by the operating the rotating mixer is about 200 g to about 460 g.

### Claim 10 (depends on 7)

The method of claim 7, wherein, in putting the electrode active material and the sulfide-based solid electrolyte into the rotating mixer, about 1 to about 10 parts by weight of the sulfide-based solid electrolyte is put into the rotating mixer per about 100 parts by weight of the electrode active material.

### Claim 11 (depends on 7)

The method of claim 7, wherein the sulfide-based solid electrolyte is:
a mixture comprising two or more selected from the group consisting of lithium (Li), phosphorus (P), sulfur (S), and halogen elements; or
a compound comprising two or more selected from the group consisting of lithium (Li), phosphorus (P), sulfur (S), and halogen elements.

### Claim 12 (depends on 7)

The method of claim 7, wherein the electrode active material has a strength of about 100 MPa to about 300 MPa.