# US 9,882,234 B2 · Method for manufacturing all-solid battery

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- Number: US 9,882,234 B2
- Document ID: US9882234B2
- Status: Granted
- Kind: B2
- Application number: 15/178,250
- Filed: 2016-06-09
- Published: 2016-12-29
- Granted: 2018-01-30
- Earliest claimed: 2015-06-23
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Daichi Kosaka; Norihiro Ose; Kengo Haga; Tomoya Suzuki; Hajime Hasegawa; Keisuke Omori
- Web page: https://patentgrep.com/patent/US9882234B2

## CPC

- H01M 10/0468: {Compression means for stacks of electrodes and separators}
- 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
- H01M 10/058: Construction or manufacture
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- 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

An all-solid battery having stacked therein, in order, a positive electrode laminate, an intermediate solid electrolyte layer, and a negative electrode laminate is manufactured by a first pressing step (i) of applying pressure to the positive electrode laminate, a second pressing step (ii) of applying pressure to the negative electrode laminate, and a third pressing step (iii) of applying pressure to the positive electrode laminate, the intermediate solid electrolyte layer, and the negative electrode laminate.

## Claims

### Claim 1

A method for manufacturing an all-solid battery having stacked therein, in order, a positive electrode laminate, an intermediate solid electrolyte layer, and a negative electrode laminate, comprising:
(i) applying pressure to the positive electrode laminate,
(ii) applying pressure to the negative electrode laminate, and
(iii) applying pressure to the positive electrode laminate, the intermediate solid electrolyte layer, and the negative electrode laminate, wherein:
the pressing pressure of the step (i) is higher than the pressing pressure of the step (iii), and
the pressing temperature of the step (i) is from 150 to 175° C.;
the pressing pressure of the step (ii) is higher than the pressing pressure of the step (iii), and the pressing temperature of the step (ii) is 125° C. or less;
the pressing temperature of the step (iii) is 125° C. or less;
the positive electrode laminate has a positive electrode collector layer and a positive electrode active material layer in this order or has a positive electrode collector layer, a positive electrode active material layer and a first solid electrolyte layer in this order;
the negative electrode laminate has a negative electrode active material layer and a copper-containing negative electrode collector layer in this order or has a second solid electrolyte layer, a negative electrode active material layer, and a copper-containing negative electrode collector layer in this order;
at least one of the first solid electrolyte layer and the second solid electrolyte layer is present; and
the intermediate solid electrolyte layer before the pressing in the step (iii) is not pressed at a pressure exceeding the pressing pressure of the step (iii).

### Claim 2 (depends on 1)

The method according to claim 1, wherein the pressing pressure of the step (i) is 710 MPa or more.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the pressing pressure of the step (ii) is 630 MPa or more.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the pressing pressure of the step (iii) is 200 MPa or less.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the area of the positive electrode laminate is smaller or larger than the area of the negative electrode laminate.

### Claim 6 (depends on 1)

The method according to claim 1, wherein:
the first solid electrolyte layer and/or the second solid electrolyte layer contain a sulfide-based crystalline solid electrolyte; and
the intermediate solid electrolyte layer contains a sulfide-based amorphous solid electrolyte.

### Claim 7 (depends on 1)

The method according to claim 1, wherein the positive electrode collector layer contains aluminum.

### Claim 8 (depends on 2)

The method according to claim 2, wherein the pressing pressure of the step (ii) is 630 MPa or more.

### Claim 9 (depends on 2)

The method according to claim 2, wherein the pressing pressure of the step (iii) is 200 MPa or less.

### Claim 10 (depends on 3)

The method according to claim 3, wherein the pressing pressure of the step (iii) is 200 MPa or less.

### Claim 11 (depends on 8)

The method according to claim 8, wherein the pressing pressure of the step (iii) is 200 MPa or less.

### Claim 12 (depends on 2)

The method according to claim 2, wherein the area of the positive electrode laminate is smaller or larger than the area of the negative electrode laminate.

### Claim 13 (depends on 3)

The method according to claim 3, wherein the area of the positive electrode laminate is smaller or larger than the area of the negative electrode laminate.

### Claim 14 (depends on 4)

The method according to claim 4, wherein the area of the positive electrode laminate is smaller or larger than the area of the negative electrode laminate.

### Claim 15 (depends on 8)

The method according to claim 8, wherein the area of the positive electrode laminate is smaller or larger than the area of the negative electrode laminate.

### Claim 16 (depends on 9)

The method according to claim 9, wherein the area of the positive electrode laminate is smaller or larger than the area of the negative electrode laminate.

### Claim 17 (depends on 10)

The method according to claim 10, wherein the area of the positive electrode laminate is smaller or larger than the area of the negative electrode laminate.

### Claim 18 (depends on 11)

The method according to claim 11, wherein the area of the positive electrode laminate is smaller or larger than the area of the negative electrode laminate.

### Claim 19 (depends on 2)

The method according to claim 2, wherein:
the first solid electrolyte layer and/or the second solid electrolyte layer contain a sulfide-based crystalline solid electrolyte; and
the intermediate solid electrolyte layer contains a sulfide-based amorphous solid electrolyte.