Electrode

Patent metadata

Field	Value
Publication number	US-2022302431-A1
Application number	US-202117462370-A
Country	US
Kind code	A1
Filing date	Aug 31, 2021
Priority date	Mar 17, 2021
Publication date	Sep 22, 2022
Grant date	—

Abstract

According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer and a current collector. The active material-containing layer comprises a first edge having an arc shape and a second edge positioned opposite to the first edge. The current collector comprises an active material-supporting section supporting the active material-containing layer, and an active material-non-supporting section. The curving amount is represented by a maximum distance from the first edge to a reference line connecting two points on the first edge. The curving amount is in a range of −1 mm or more and less than 0 mm.

First claim

What is claimed is:

1 . An electrode, comprising:
an active material-containing layer comprising a first edge having an arc shape and a second edge positioned opposite to the first edge, the active material-containing layer comprising an electrode active material; and a current collector comprising an active material-supporting section supporting the active material-containing layer, and an active material-non-supporting section which is adjacent to the active material-supporting section and the second edge and is not provided with the active material-containing layer, wherein when
a curving amount is represented by a maximum distance from the first edge to a reference line connecting two points on the first edge,
the two points are spaced apart from each other at a straight-line distance of 1000 mm, and
the curving amount in a direction from the first edge toward the second edge is represented by a positive value,
the curving amount is in a range of −1 mm or more and less than 0 mm.

2 . The electrode according to claim 1 , wherein the current collector comprises aluminum.

3 . The electrode according to claim 1 , wherein a width of the active material-containing layer between the first edge and the second edge is from 60 mm to 250 mm, and a width of the active material-non-supporting section in a direction intersecting with the second edge is from 5 mm to 25 mm.

4 . The electrode according to claim 1 , wherein a mass per unit area of the active material-containing layer on the active material-supporting section is from 100 g/m 2 to 300 g/m 2 for each surface of the current collector.

5 . The electrode according to claim 1 , wherein the curving amount is in a range of −1 mm or more and −0.05 mm or less.

6 . The electrode according to claim 1 , wherein the curving amount is an amount of curve when producing the electrode.

7 . The electrode according to claim 1 , wherein the curving amount is a value before producing an electrode group.

Assignees

• Toshiba Kk

Inventors

• Kanai Yuta
• Yamashita Yasunobu
• Yoshima Kazuomi
• Hoshina Keigo
• Sasakawa Tetsuya
• Harada Yasuhiro
• Takami Norio

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/0525 Primary

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

• H01M4/661

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title