Method for making battery slurry

Patent metadata

Field	Value
Publication number	US-2017288204-A1
Application number	US-201715625584-A
Country	US
Kind code	A1
Filing date	Jun 16, 2017
Priority date	Dec 16, 2014
Publication date	Oct 5, 2017
Grant date	—

Abstract

A method for making a battery slurry is disclosed. The method comprises providing a plurality of solid raw materials and at least one liquid raw material, the at least one liquid raw material is divided into a first part solvent and a second part solvent to be used; mixing the plurality of solid raw materials to obtain a dry powder; kneading the dry powder and the first part solvent to obtain a doughy mixture; and dispersing the doughy mixture to the second part solvent to obtain the battery slurry.

First claim

What is claimed is:

1 . A method for making a battery slurry, comprising:
providing a plurality of solid raw materials and at least one liquid raw material, the at least one liquid raw material comprising a first part solvent and a second part solvent; mixing the plurality of solid raw materials to obtain a dry powder; kneading the dry powder and the first part solvent to obtain a doughy mixture; and dispersing the doughy mixture to the second part solvent to obtain the battery slurry.

2 . The method of claim 1 , wherein the plurality of solid raw materials are mixed in a vacuum environment.

3 . The method of claim 2 , wherein the plurality of solid raw materials are mixed at a temperature range from about 30° C. to about 150° C.

4 . The method of claim 2 , wherein the plurality of solid raw materials are mixed for a period of about 30 minutes to about 120 minutes

5 . The method of claim 1 , wherein a mass ratio of the dry powder to the first part solvent is in a range from about 1:9 to about 1:1.

6 . The method of claim 1 , wherein the dry powder and the first part solvent are kneaded in a vacuum environment.

7 . The method of claim 6 , wherein a vacuum pressure of the vacuum environment is lower than −0.09 MPa.

8 . The method of claim 6 , wherein the dry powder and the first part solvent are kneaded at a temperature range from about 25° C. to about 45° C.

9 . The method of claim 6 , wherein the dry powder and the first part solvent are kneaded for a period of about 30 minutes to about 120 minutes.

10 . The method of claim 1 , wherein the doughy mixture is dispersed to the second part solvent by stirring at a speed greater than or equal to about 15 m/s.

11 . The method of claim 10 , wherein the speed is in a range from about 15 m/s to about 70 m/s.

12 . The method of claim 10 , wherein the doughy mixture and the second part solvent are dispersed for a period of about 5 minutes to about 30 minutes.

13 . The method of claim 1 , wherein the doughy mixture and the second part solvent are dispersed at a temperature range from about 25° C. to about 45° C.

14 . The method of claim 1 , wherein a component of the first part solvent is the same as a component of the second part solvent.

15 . The method of claim 1 , wherein the battery slurry is an electrode slurry of the lithium ion battery, the plurality of solid raw materials comprise an active material, a conducting agent, and a binder, and at least one liquid raw materials can be at least one of N-methyl-2-pyrrolidone (NMP), N,N-dimethyl formamide (DMF), N,N-diethyl formamide (DEF), dimethyl sulfoxide (DMSO), tetrahydrofuran (THF), acetone, ethanol, and deionized water.

Assignees

• Jiangsu Huadong Inst Of Li-Ion Battery Co Ltd
• Univ Tsinghua

Inventors

• He xiang-ming
• Zhang hong-sheng
• Li Jian-Jun
• Wang Li
• Shang yu-ming
• Qian guan-nan

Classifications

• H01M10/0525

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

• H01M4/139 Primary

  Processes of manufacture · CPC title

• H01M4/04 Primary

  Processes of manufacture in general · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title