# US 2021/0242504 A1 · Manufacturing method for all-solid-state lithium secondary battery

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- Number: US 2021/0242504 A1
- Document ID: US20210242504A1
- Status: Published application
- Kind: A1
- Application number: 17/048,989
- Filed: 2018-04-24
- Published: 2021-08-05
- Earliest claimed: 2018-04-20
- Assignees: Tdl Co., Ltd.
- Applicants: Tdl Co., Ltd.
- Inventors: Yu Sin Kim; Jung Huan Kim
- Web page: https://patentgrep.com/patent/US20210242504A1

## CPC

- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H01M 4/0407: {by coating on an electrolyte layer}
- H01M 4/0409: {by a doctor blade method, slip-casting or roller coating}
- H01M 4/043: {involving compressing or compaction}
- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- H01M 4/624: {Electric conductive fillers}
- H01M 10/052: Li-accumulators
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0562: Solid materials
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- 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
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Disclosed is a manufacturing method for an all-solid-state lithium secondary battery.

## Claims

### Claim 1

A manufacturing method of an all-solid-state lithium secondary battery, comprising:
coating a first electrode slurry on a base film proceeding in a roll-to-roll manner, performing a first heat treatment, and performing first pressurization to form a first electrode layer;
coating a solid electrolyte slurry on the first electrode layer, performing a second heat treatment, and performing second pressurization to form a solid electrolyte layer; and
coating a second electrode slurry on the solid electrolyte layer, performing a third heat treatment, and performing third pressurization to form a second electrode layer,
wherein the first electrode is a positive electrode, and the second electrode is a negative electrode, or
the first electrode is a negative electrode, and the second electrode is a positive electrode.

### Claim 2 (depends on 1)

The manufacturing method of claim 1, wherein at least one of the first electrode slurry, the solid electrolyte slurry, and the second electrode slurry includes a conductive polymer.

### Claim 3 (depends on 1)

The manufacturing method of claim 1, wherein:
the first heat treatment is performed at a temperature of 20° C. to 40° C.;
the second heat treatment is performed at a temperature of 20° C. to 40° C.; or
the third heat treatment is performed at a temperature of 20° C. to 40° C.

### Claim 4 (depends on 1)

The manufacturing method of claim 1, further comprising a fourth heat treatment operation after the first heat treatment and before the first pressurization, a fifth heat treatment operation after the second heat treatment and before the second pressurization, or a sixth heat treatment operation after the third heat treatment and before the third pressurization.

### Claim 5 (depends on 4)

The manufacturing method of claim 4, wherein:
the fourth heat treatment operation is performed at a temperature of 60° C. to 70° C.;
the fifth heat treatment operation is performed at a temperature of 60° C. to 70° C.; and
the sixth heat treatment operation is performed at a temperature of 60° C. to 70° C.

### Claim 6 (depends on 1)

The manufacturing method of claim 1, wherein at least one of the first pressurization, the second pressurization, and the third pressurization is performed by thermocompression.

### Claim 7 (depends on 6)

The manufacturing method of claim 6, wherein the thermocompression is performed at a temperature of 60° C. to 70° C. and a pressure of 0.5 MPa to 0.7 MPa.