# US 2026/0094801 A1 · Manufacturing method for negative electrode

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- Number: US 2026/0094801 A1
- Document ID: US20260094801A1
- Status: Published application
- Kind: A1
- Application number: 19/296,195
- Filed: 2025-08-11
- Published: 2026-04-02
- Earliest claimed: 2024-09-27
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Minehiro FUNATO; Nariaki MIKI; Tomoyuki UEZONO
- Web page: https://patentgrep.com/patent/US20260094801A1

## CPC

- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/0435: {Rolling or calendering}
- H01M 4/1393: of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/587: for inserting or intercalating light metals
- H01M 2004/027: {Negative electrodes}
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A manufacturing method for a negative electrode includes: supplying a negative electrode mixed material containing graphite to a metal foil serving as a current collector; and applying a magnetic field to the negative electrode mixed material supplied to the metal foil. The supplying of the negative electrode mixed material is supplying the negative electrode mixed material to the metal foil conveyed along an outer peripheral surface of a magnet roll serving as a backup roll. The applying of the magnetic field includes a first magnetic field applying step of applying, by the magnet roll, a magnetic field to the negative electrode mixed material, and a second magnetic field applying step of further applying, after the metal foil supplied with the negative electrode mixed material passes the magnet roll, a magnetic field to the negative electrode mixed material.

## Claims

### Claim 1

A manufacturing method for a negative electrode, the manufacturing method comprising:
supplying a negative electrode mixed material containing graphite to a metal foil serving as a current collector; and
applying a magnetic field to the negative electrode mixed material supplied to the metal foil, wherein:
the supplying of the negative electrode mixed material is supplying the negative electrode mixed material to the metal foil conveyed along an outer peripheral surface of a magnet roll serving as a backup roll; and
the applying of the magnetic field includes a first magnetic field applying step of applying, by the magnet roll, a magnetic field to the negative electrode mixed material, and a second magnetic field applying step of further applying, after the metal foil supplied with the negative electrode mixed material passes the magnet roll, a magnetic field to the negative electrode mixed material.

### Claim 2 (depends on 1)

The manufacturing method according to claim 1, wherein, in the first magnetic field applying step, a holding angle of the magnet roll to the metal foil supplied with the negative electrode mixed material is 90 degrees or more and 350 degrees or less.

### Claim 3 (depends on 1)

The manufacturing method according to claim 1, wherein, in the first magnetic field applying step, a holding angle of the magnet roll to the metal foil supplied with the negative electrode mixed material is 180 degrees or more and 350 degrees or less.