Negatives Elektrodenmaterial aus Silicium-Kohlenstoff und Herstellungsverfahren dafür und Verwendung davon

Details

Veröffentlichungs-Nr.

EP4738466

Anmeldetag

30. April 2024

Veröffentlichung

2. Januar 2025

Rechtsraum

EP

Abstract

A silicon-carbon negative electrode material includes a core and a shell. The core includes a porous carbon skeleton and silicon dispersed in pores of the porous carbon skeleton. Carbon nanotubes are wrapped and dispersed in the porous carbon skeleton. In the silicon-carbon negative electrode material, the content of silicon elements in the silicon-carbon negative electrode material is 25 wt% to 55 wt%. The shell includes a carbon material. In a linear scanning electron microscope and energy-dispersive X-ray spectrum of a cross section of the silicon-carbon negative electrode material, the standard deviation of content changes of the silicon elements from the center to the edge of the cross section does not exceed 200. Further provided are an electrochemical apparatus and a preparation method for a silicon-carbon negative electrode material. This application can improve electrical conductivity and reduce expansion, thereby prolonging the service life.

Anmelder

Firma

Ningde Amperex Technology Limited

Land

🇨🇳 China