Negativelektrode einer Sekundärbatterie, Verfahren zur Herstellung der Negativelektrode und Sekundärbatterie mit der Negativelektrode

Details

Veröffentlichungs-Nr.

EP4718507

Anmeldetag

8. September 2025

Veröffentlichung

1. April 2026

Rechtsraum

EP

Abstract

Provided is a negative electrode (60) that contains Si-containing particles (14, 18) and graphite particles (16), and causes less swelling when a secondary battery is repeatedly charged and discharged. The negative electrode of a secondary battery of the present disclosure includes a negative electrode current collector (62), and a negative electrode active material layer (64) supported by the negative electrode current collector. The negative electrode active material layer includes a first layer (64a) located on a surface layer part side, and a second layer (64b) located on a negative electrode current collector side. The first layer contains first graphite particles and first Si-containing particles (14). The second layer contains second graphite particles and second Si-containing particles (18). The content rate of Si in the first Si-containing particles is smaller than the content rate of Si in the second Si-containing particles. When a density of a molded body obtained by uniaxially pressurizing and molding 1 g of particles at 25°C and at 60 MPa into a tablet having a diameter of 20 mm is defined as a consolidation density, a consolidation density of the first Si-containing particles is 0.9 g/cm<3> or more and a consolidation density of the second Si-containing particles is less than 0.9 g/cm<3>.

Anmelder

Firma

Prime Planet Energy & Solutions, Inc.

Land

🇯🇵 Japan