Method of manufacturing formed body for electrode

Patent metadata

Field	Value
Publication number	US-2022123275-A1
Application number	US-202117563092-A
Country	US
Kind code	A1
Filing date	Dec 28, 2021
Priority date	Aug 19, 2019
Publication date	Apr 21, 2022
Grant date	—

Abstract

A method of manufacturing a formed body for an electrode includes: preparing an electrode material; placing a shape retaining member having an rectangular tubular shape with one opening portion L thereof facing down, and supplying the electrode material into the shape retaining member from the other opening portion M thereof, and discharging the electrode material onto a support from the opening portion L while relatively moving the opening portion L and the support, to form a film, a bulk density D 1 of the electrode material in the first step and a bulk density D 2 of the electrode material at the opening portion L satisfying a relationship of D 2 /D 1 =1.1 to 30, and a width T 1 of the opening portion L in a short side direction and a distance T 2 between the end portion X of the opening portion L and the support satisfying a relationship of width T 1 >distance T 2 .

First claim

What is claimed is:

1 . A method of manufacturing a formed body for an electrode comprising in order:
a first step of preparing an electrode material containing an electrode active material; a second step of placing a shape retaining member having a rectangular tubular shape with rectangular opening portions, in which one end portion X of a pair of long side end portions of one opening portion L is present closer to the other opening portion M than the other end portion Y of the pair of long side end portions, with the opening portion L facing down so that an axial direction of the shape retaining member is parallel to a direction of gravitational force, and supplying the electrode material into the shape retaining member from the opening portion M of the shape retaining member; and a third step of discharging the electrode material in the shape retaining member onto a support from the opening portion L while relatively moving the opening portion L of the shape retaining member and the support along a short side direction of the opening portion L, to form a film of the electrode material on the support, wherein in a case where a bulk density of the electrode material prepared in the first step is denoted by D 1 [g/cm 3 ] and a bulk density of the electrode material at the opening portion L of the shape retaining member is denoted by D 2 [g/cm 3 ], bulk density D 2 /bulk density D 1 =1.1 to 30 is satisfied, and in a case where a width of the opening portion L in the short side direction is denoted by T 1 [mm] and a distance between the end portion X of the opening portion L and the support is denoted by T 2 [mm], a relationship of width T 1 >distance T 2 is satisfied.

2 . The method of manufacturing a formed body for an electrode according to claim 1 ,
wherein the width T 1 and the distance T 2 satisfy width T 1 /distance T 2 =1.5 to 500.

3 . The method of manufacturing a formed body for an electrode according to claim 1 ,
wherein the distance T 2 is 0.1 mm to 1.0 mm.

4 . The method of manufacturing a formed body for an electrode according to claim 1 ,
wherein the width T 1 is 1.5 mm to 50 mm.

5 . The method of manufacturing a formed body for an electrode according to claim 1 ,
wherein the bulk density D 2 is 0.55 g/cm 3 to 3.0 g/cm 3 .

6 . The method of manufacturing a formed body for an electrode according to claim 1 ,
wherein the bulk density D 1 is 0.1 g/cm 3 to 0.5 g/cm 3 .

7 . The method of manufacturing a formed body for an electrode according to claim 1 ,
wherein the bulk density D 1 and the bulk density D 2 satisfy bulk density D 2 /bulk density D 1 =1.5 to 20.

8 . The method of manufacturing a formed body for an electrode according to claim 1 ,
wherein in the second step, the electrode material is pressure-fed into the shape retaining member from the opening portion M of the shape retaining member by a pressure feed unit to supply the electrode material into the shape retaining member from the opening portion M of the shape retaining member.

Assignees

• Fujifilm Corp

Inventors

• Iwase Eijiro
• FUKUNAGA Akihito
• Nakayama Takehiko
• Tonohara Koji

Classifications

• B29C41/28

  by depositing flowable material on an endless belt · CPC title

• B05D1/265

  Extrusion coatings · CPC title

• B05D1/26

  performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface · CPC title

• B05C5/0254

  Coating heads with slot-shaped outlet (B05C5/0283 takes precedence) · CPC title

• H01M4/0404

  by coating on electrode collectors · CPC title