Negative Elektrode einer Sekundärbatterie und Sekundärbatterie mit der Negativen Elektrode

Details

Veröffentlichungs-Nr.

EP4718515

Anmeldetag

5. September 2025

Veröffentlichung

1. April 2026

Rechtsraum

EP

IPC

(LEE JAEWOOK et al.)(주식회사 그랩실)

Abstract

Provided is a negative electrode that contains Si-containing particles and graphite particles, 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, and a negative electrode active material layer supported by the negative electrode current collector. The negative electrode active material layer includes a first layer located on a surface layer part side, and a second layer located on a negative electrode current collector side. The first layer contains first graphite particles and first Si-containing particles. The second layer contains second graphite particles and second Si-containing particles. An aspect ratio of the first Si-containing particles is larger than an aspect ratio of the second Si-containing particles. The aspect ratio of the first Si-containing particles is 4.0 to 10.0. The aspect ratio of the second Si-containing particles is 1.0 to 3.0.

Anmelder

Firma

Prime Planet Energy & Solutions, Inc.

Land

🇯🇵 Japan