All-solid battery and manufacturing method therefor

Patent metadata

Field	Value
Publication number	US-9368828-B2
Application number	US-201414150304-A
Country	US
Kind code	B2
Filing date	Jan 8, 2014
Priority date	Jul 8, 2011
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A method for manufacturing an all-solid battery that includes: preparing a first green sheet as a green sheet for at least any one of a positive electrode layer and a negative electrode layer; preparing a second green sheet as a green sheet for a solid electrolyte layer; forming a stacked body by stacking the first green sheet and the second green sheet; and firing the stacked body while a pressure of 0.01 kg/cm 2 or more and 100 kg/cm 2 or less is applied in the stacking direction of the stacked body.

First claim

The invention claimed is:

1. A method for manufacturing an all-solid battery, the method comprising:
preparing a first green sheet as a green sheet for at least any one of a positive electrode layer and a negative electrode layer;
preparing a second green sheet as a green sheet for a solid electrolyte layer;
forming a stacked body by stacking the first green sheet and the second green sheet; and
firing the stacked body while a pressure of 0.01 kg/cm 2 or more and 100 kg/cm 2 or less is applied in a stacking direction of the stacked body.

2. The method for manufacturing an all-solid battery according to claim 1 , wherein the stacked body is fired while a pressure of 0.1 kg/cm 2 or more and 50 kg/cm 2 or less is applied in the stacking direction of the stacked body.

3. The method for manufacturing an all-solid battery according to claim 1 , wherein stacked body is fired while a pressure of 1 kg/cm 2 or more and 10 kg/cm 2 or less is applied in the stacking direction of the stacked body.

4. The method for manufacturing an all-solid battery according to claim 1 , wherein green sheets for the positive electrode layer, the solid electrolyte layer, and the negative electrode layer are stacked to form a stacked body having an electrical cell structure.

5. The method for manufacturing an all-solid battery according to claim 1 , wherein at least one material for the positive electrode layer, the solid electrolyte layer, or the negative electrode layer contains a solid electrolyte comprising a lithium-containing phosphate compound having a NASICON-type structure.

6. The method for manufacturing an all-solid battery according to claim 1 , wherein at least one material for the positive electrode layer or the negative electrode layer contains an electrode active material comprising a lithium-containing phosphate compound.

7. The method for manufacturing an all-solid battery according to claim 6 , wherein the stacked body is fired in an atmosphere where a transition metal contained in the electrode active material undergoes no change in valence.

8. The method for manufacturing an all-solid battery according to claim 1 , wherein the stacked body is formed by sequentially stacking the green sheets, and applying pressure to the stacked green sheets.

9. The method for manufacturing an all-solid battery according to claim 8 , wherein the pressure applied when forming the stacked body is 500 kg/cm2 or more and 5000 kg/cm2 or less.

10. The method for manufacturing an all-solid battery according to claim 9 , wherein, when the pressure is applied to the stacked body, heat is applied.

11. The method for manufacturing an all-solid battery according to claim 10 , wherein a temperature of the heat is 20° C. or higher and 100° C. or lower.

Assignees

• Murata Manufacturing Co

Inventors

• Ouchi Masutaka
• Yoshioka Makoto
• Hayashi Takeshi

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M4/0471 Primary

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title

• H01M4/139

  Processes of manufacture · CPC title

• Y02E60/122

  Cross-Sectional Technologies · mapped topic

• H01M10/0436 Primary

  Small-sized flat cells or batteries for portable equipment · CPC title