Negative Elektrode einer Sekundärbatterie und Sekundärbatterie mit Dieser Negativen Elektrode

Details

Veröffentlichungs-Nr.

EP4718514

Anmeldetag

4. September 2025

Veröffentlichung

1. April 2026

Rechtsraum

EP

Abstract

Provided is a technique to suppress a capacity maintenance rate reduction. A negative electrode disclosed herein includes a negative electrode active material layer including a first Si-containing particle and a second Si-containing particle. When an expansion rate S2 of the second Si-containing particle after an electrical charge A with respect to one before the electrical charge A is treated as 1, an expansion rate S1 of the first Si-containing particle after the electrical charge A with respect to one before the electrical charge A is more than 0.3 and not more than 0.9. When the mean particle diameter (D50) of the first Si-containing particle is treated as 1, the mean particle diameter (D50) of the second Si-containing particle is more than 0.1 and not more than 1.

Anmelder

Firma

Prime Planet Energy & Solutions, Inc.

Land

🇯🇵 Japan