Method for manufacturing slurry for positive electrode of nonaqueous electrolyte secondary battery and slurry for positive electrode of nonaqueous electrolyte secondary battery

Patent metadata

Field	Value
Publication number	US-2018183047-A1
Application number	US-201815900559-A
Country	US
Kind code	A1
Filing date	Feb 20, 2018
Priority date	Feb 8, 2016
Publication date	Jun 28, 2018
Grant date	—

Abstract

Provided is a method for manufacturing a slurry for a positive electrode of a nonaqueous electrolyte secondary battery containing an alkali metal complex oxide, the method making it possible to reliably deaerate surplus carbonic acid gas after an alkali component of a slurry containing the alkali metal complex oxide is neutralized within a short period of time. The method for manufacturing a slurry for a positive electrode of a nonaqueous electrolyte secondary battery includes a step of manufacturing an electrode slurry including a step of performing a neutralization treatment on an alkali component in the slurry by using inorganic carbon dissolved in a solvent of the slurry and a step of deaerating the inorganic carbon in the slurry as carbonic acid gas by causing cavitation.

First claim

What is claimed is:

1 . A method for manufacturing a slurry for a positive electrode of a nonaqueous electrolyte secondary battery containing an alkali metal complex oxide, comprising:
a step of manufacturing an electrode slurry including a step of performing a neutralization treatment on an alkali component in the slurry by using inorganic carbon dissolved in a solvent of the slurry; and a step of deaerating the inorganic carbon in the slurry as carbonic acid gas by causing cavitation.

2 . The method for manufacturing a slurry for a positive electrode of a nonaqueous electrolyte secondary battery according to claim 1 ,
wherein the alkali metal complex oxide is a lithium complex oxide.

3 . The method for manufacturing a slurry for a positive electrode of a nonaqueous electrolyte secondary battery according to claim 1 , further comprising:
a step of dispersing and mixing solid contents of the slurry by causing cavitation.

4 . The method for manufacturing of a slurry for a positive electrode of a nonaqueous electrolyte secondary battery according to claim 1 ,
wherein in the step of performing a neutralization treatment on an alkali component in the slurry by using inorganic carbon dissolved in a solvent of the slurry, the inorganic carbon dissolved in the solvent of the slurry is inorganic carbon generated by dissolving carbonic acid gas in the solvent of the slurry, and a pressure of the carbonic acid gas is equal to or higher than 0.12 MPa and equal to or lower than 100 MPa.

5 . The method for manufacturing of a slurry for a positive electrode of a nonaqueous electrolyte secondary battery according to claim 4 ,
wherein the pressure of the carbonic acid gas is equal to or higher than 0.2 MPa and equal to or lower than 50 MPa.

6 . The method for manufacturing of a slurry for a positive electrode of a nonaqueous electrolyte secondary battery according to claim 5 ,
wherein the pressure of the carbonic acid gas is equal to or higher than 0.3 MPa and equal to or lower than 10 MPa.

Assignees

• Nihon Spindle Mfg Co Ltd
• Aist

Inventors

• Sakamoto Taichi
• Mukai Takashi
• IKEUCHI Yuta
• Yamashita Naoto
• Yanagida Masahiro
• Asami Keiichi
• Onishi Keiichiro

Classifications

• H01M10/0525

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

• H01M4/136

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• C01G53/54

  of the type (Mn2O4)-, e.g. Li(NixMn2-x)O4 or Li(MyNixMn2-x-y)O4 · CPC title

• H01M4/1391 Primary

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M10/052

  Li-accumulators · CPC title