Electrode manufacturing method, electrode current collector, and electrode

Patent metadata

Field	Value
Publication number	US-12592391-B2
Application number	US-202217981184-A
Country	US
Kind code	B2
Filing date	Nov 4, 2022
Priority date	Jan 11, 2022
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

An electrode is manufactured by forming an active material layer on a surface of an electrode current collector, forming a groove portion on a surface of the active material layer, and peeling off a part of the active material layer. An electrode current collector includes a metal foil and an adhesive layer. The metal foil includes a first region and a second region. The adhesive layer covers the first region. In the second region, the metal foil is exposed. The active material layer includes a first portion that covers the adhesive layer and a second portion that covers the second region. The groove portion is formed in each of the first portion and the second portion. The second portion is peeled off.

First claim

What is claimed is:

1 . An electrode manufacturing method comprising:
manufacturing an electrode by:
forming an active material layer on a surface of an electrode current collector;
forming a groove portion on a surface of the active material layer; and
peeling off a part of the active material layer, wherein:
the electrode current collector includes a metal foil and an adhesive layer; in planar view, the metal foil includes a first region and a second region; the adhesive layer covers the first region; the second region is adjacent to the first region; in the second region, the metal foil is exposed; the active material layer is formed to include a first portion and a second portion; the second portion is adjacent to the first portion; the first portion covers the adhesive layer; the second portion covers the second region; the groove portion is formed in each of the first portion and the second portion; a part of the groove portion is formed along a boundary between the first portion and the second portion; and as the part of the active material layer, the second portion is peeled off, wherein the part of the groove portion acts as a cut line of the active material layer when the second portion is peeled off.

2 . The electrode manufacturing method according to claim 1 , wherein the forming of the active material layer includes:
preparing a wet powder; processing the wet powder into the active material layer by roll forming; and arranging the active material layer on the surface of the electrode current collector.

3 . The electrode manufacturing method according to claim 1 , wherein the part of the active material layer is peeled by applying vibration to the second portion.

4 . The electrode manufacturing method according to claim 1 , wherein the part of the groove portion extends linearly along the boundary.

5 . The electrode manufacturing method according to claim 1 , wherein the adhesive layer has a thickness of 0.1 μm to 5 μm.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kintsu Yusuke
• Mimura Tetsuya
• Shionoya Haruka
• Sakashita Yasuhiro
• Kondo Takeshi
• Tasaki Tomoyuki
• Kawamoto Yuta

Classifications

• H01M4/0404 Primary

  by coating on electrode collectors · CPC title

• H01M4/0435

  Rolling or calendering · CPC title

• H01M4/661

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

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/668

  Composites of electroconductive material and synthetic resins · CPC title