Negatives Elektrodenmaterial aus Silicium-Kohlenstoff und Herstellungsverfahren dafür

Details

Veröffentlichungs-Nr.

EP4742321

Anmeldetag

24. Mai 2024

Veröffentlichung

5. Juni 2025

Rechtsraum

EP

IPC

H01M4/36, H01M4/48

Abstract

A silicon-carbon negative electrode material and a preparation method therefor are provided. the silicon-carbon negative electrode material includes a carbon skeleton having a pore structure and a silicon-based material arranged in the pore structure, where in a region formed by extending from a surface of the silicon-carbon negative electrode material inward by 10 nm away from the surface, a content of high-valence silicon is less than 25% relative to a total amount of low-valence silicon and the high-valence silicon, where the low-valence silicon is silicon with a valence of 0 to 2, and the high-valence silicon is silicon with a valence of 3 to 4. For the silicon-carbon negative electrode material, the specific delithiated capacity and the initial coulombic efficiency of the silicon-carbon negative electrode material can be improved, and the specific discharge capacity and the initial coulombic efficiency of a secondary battery can be enhanced.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China