Toyota Jidosha Kabushiki Kaisha

Zeon Corporation

Junya Mori

Hideki Hagiwara

Yuto Hosono

A method for manufacturing an electrode for a lithium ion battery is provided. A powder layer is formed by using a squeegee roll to squeegee powder including an electrode active material and supplied onto a substrate, and then compacted on the substrate by means of a pair of press rolls while conveying the substrate vertically downward to form an electrode sheet. The method includes: supplying the powder onto the substrate; leveling the powder supplied onto the substrate to form the powder layer using the squeegee roll which is disposed in a position so that a squeegee angle formed by a vertical line passing through the rotating axis of one of the press rolls and a line passing through said rotating axis and the rotating axis of the squeegee roll is 0&#xb0; to 60&#xb0;; and compacting the powder layer on the substrate using the pair of press rolls.

Method for manufacturing electrode for lithium ion battery

A method of producing an electrode for an electricity storage device includes producing a paste to form an electrode active material layer, in which aggregates of a solids fraction material that contains at least an electrode active material and a binder are dispersed in a solvent, coating the paste on a surface of a current collector, and drying the current collector coated with the paste, to form the electrode active material layer formed of the solids fraction material. The paste is produced in such a manner that a content ratio of the solids fraction material in the paste is 60 to 80 mass %, an abundance ratio for the aggregates with a particle size that is equal to or smaller than 20 &#x3bc;m is at least 99%, and a viscosity at 25&#xb0; C. and a shear rate of 40 sis 200 to 5,000 mPa&#xb7;s.

Growing community of inventors

Okazaki, Japan

Junya Mori