Storage battery electrode, manufacturing method thereof, storage battery, and electronic device

Patent metadata

Field	Value
Publication number	US-2021167353-A1
Application number	US-202117171042-A
Country	US
Kind code	A1
Filing date	Feb 9, 2021
Priority date	Jan 9, 2015
Publication date	Jun 3, 2021
Grant date	—

Abstract

In manufacturing a storage battery electrode, a method for manufacturing a storage battery electrode with high capacity and stability is provided.
As a method for preventing a mixture for forming an active material layer from becoming strongly basic, a first aqueous solution is formed by mixing an active material exhibiting basicity with an aqueous solution exhibiting acidity and including an oxidized derivative of a first conductive additive; a first mixture is formed by reducing the oxidized derivative of the first conductive additive by drying the first aqueous solution; a second mixture is formed by mixing a second conductive additive and a binder; a third mixture is formed by mixing the first mixture and the second mixture; and a current collector is coated with the third mixture. The strong basicity of the mixture for forming an active material layer is lowered; thus, the binder can be prevented from becoming gelled.

First claim

1 . A method for manufacturing a storage battery electrode, comprising:
forming a first aqueous solution by mixing an active material with an aqueous solution including an oxidized derivative of a first conductive additive; forming a first mixture by drying the aqueous solution; forming a second mixture by mixing a second conductive additive and a binder; forming a third mixture by mixing the first mixture and the second mixture; and coating a current collector with the third mixture and reducing the oxidized derivative of the first conductive additive.

Assignees

• Semiconductor Energy Lab

Inventors

• Kawakami Takahiro
• Momma Yohei
• Ochiai Teruaki
• Ikenuma Tatsuya

Classifications

• H01M4/625

  Carbon or graphite · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M4/0404 Primary

  by coating on electrode collectors · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M4/139

  Processes of manufacture · CPC title