Method of manufacturing all-solid battery through wet-dry mixing process

Patent metadata

Field	Value
Publication number	US-2016268638-A1
Application number	US-201514966555-A
Country	US
Kind code	A1
Filing date	Dec 11, 2015
Priority date	Mar 12, 2015
Publication date	Sep 15, 2016
Grant date	—

Abstract

Disclosed is a method of manufacturing an all-solid battery by a wet-dry mixing process, such that a binder can be uniformly dispersed in a solid electrolyte layer. As such, the size of the battery can be increased and and a thickness of the battery can be reduced.

First claim

What is claimed is:

1 . A method of manufacturing an all-solid battery through a wet-dry mixing process, comprising:
preparing a solid electrolyte slurry by mixing a solvent, a binder, and a solid electrolyte; preparing a solid electrolyte mixture powder by drying the solid electrolyte slurry to remove the solvent; forming a thin film solid electrolyte layer by compressing the solid electrolyte mixture powder; applying a cathode active material and an anode active material on o each surface of the thin film solid electrolyte layer; and applying a pressure on the cathode active material and anode active material.

2 . The method of claim 1 , wherein the solid electrolyte slurry comprises an amount of about 40 to 70 wt % of the solid electrolyte, an amount of about 1 to 10 wt % of the binder, and an amount of about 20 to 50 wt % of the solvent, all the wt % based on the total weight of the solid electrolyte slurry.

3 . The method of claim 1 , wherein the solid electrolyte slurry is dried under a vacuum state.

4 . The method of claim 1 , wherein the cathode active material and the anode active material are applied on each surface of the thin film solid electrolyte layer such that the thin film solid electrolyte layer is interposed between the cathode active material and the anode active material.

5 . The method of claim 1 , wherein the pressure is applied to the cathode active material and the anode active material by using a current collector substrate.

6 . The method of claim 1 , wherein the solid electrolyte comprises at least one selected from the group consisting of Li 2 S—P 2 S 5 , Li 6 PS 5 Cl, and Li 10 SnP 2 S 12 .

7 . The method of claim 1 , wherein the solvent comprises at least one selected from the group consisting of xylene, hexane, and benzene.

8 . The method of claim 1 , wherein the binder comprises at least one selected from the group consisting of an acrylonitrile butadiene rubber (NBR), an acryl polymer, and a silicon polymer.

9 . The method of claim 1 , wherein the cathode active material is LiCoO 2 .

10 . The method of claim 1 , wherein the anode active material is a graphite.

11 . A method of manufacturing an all-solid battery through a wet-dry mixing process, comprising:
preparing a solid electrolyte slurry by mixing a solvent, a binder, and a solid electrolyte; preparing a solid electrolyte mixture powder by drying the solid electrolyte slurry to remove the solvent; forming a thin film solid electrolyte layer by compressing the solid electrolyte mixture powder; and laminating a cathode active material and an anode active material on each surface of the thin film solid electrolyte layer.

12 . An all-solid battery that is manufactured by a method of claim 1 .

Assignees

• Hyundai Motor Co Ltd

Inventors

• Jang Yong Jun
• Lee Ho Taek
• Kwon Eun Ji
• Sung Ju Young
• Kim Ji Na

Classifications

• H01M10/0585 Primary

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/1393

  of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title