Method for manufacturing all-solid battery

Patent metadata

Field	Value
Publication number	US-9882234-B2
Application number	US-201615178250-A
Country	US
Kind code	B2
Filing date	Jun 9, 2016
Priority date	Jun 23, 2015
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

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.

First claim

What is claimed is:

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).

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

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

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

5. 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.

6. 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.

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

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

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

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

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

12. 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.

13. 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.

14. 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.

15. 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.

16. 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.

17. 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.

18. 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.

19. 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.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kosaka Daichi
• Ose Norihiro
• Haga Kengo
• Suzuki Tomoya
• Hasegawa Hajime
• Omori Keisuke

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M10/0562

  Solid materials · CPC title

• Y02E60/122

  Cross-Sectional Technologies · mapped topic

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/0468 Primary

  Compression means for stacks of electrodes and separators · CPC title