Negativelektrodenmaterial, Negativelektrodenfolie, Elektrochemische Vorrichtung und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4738455

Anmeldetag

26. Juni 2024

Veröffentlichung

2. Januar 2025

Rechtsraum

EP

Abstract

A negative electrode material, a negative electrode plate, an electrochemical apparatus, and an electric device are provided. The negative electrode material includes a core and a shell layer. The core is porous carbon with pores; where a silicon material is present on wall surfaces of the pores. The shell layer is a carbon material, and the shell layer encapsulates the core surface, sealing the pores. In the negative electrode material, the porous carbon and the carbon material of the shell layer have a disordered structure, resulting in less lithium storage. The pores serve as the primary region for lithium storage, with the silicon material present on the wall surfaces of the pores. The silicon material, as a lithiophilic substance, can induce lithium to enter the pores of the core from the external shell layer of the negative electrode material, enabling deposition position to be controlled during lithium metal deposition, reducing non-uniform lithium metal deposition, and thereby facilitating an improvement in the specific capacity and cycling performance of lithium-ion batteries.

Anmelder

Firma

Ningde Amperex Technology Limited

Land

🇨🇳 China