Lithium-Ionen-Batterie

Details

Veröffentlichungs-Nr.

EP4769530

Anmeldetag

19. Dezember 2025

Veröffentlichung

1. Juli 2026

Rechtsraum

EP

Abstract

The present invention relates to the field of lithium batteries, and in particular to a lithium-ion battery. The lithium-ion battery includes at least a negative electrode and an electrolyte; the electrolyte includes an additive, the additive contains at least a fluoroethylene carbonate (FEC), and the mass percentage of the FEC in the electrolyte is a; the electrolyte has a conductivity of d ms/cm; the initial Coulombic efficiency of the negative electrode is c; the negative electrode includes a negative electrode active material, the negative electrode active material includes a silicon-based material, and the mass percentage of the silicon-based material in the negative electrode active material is b; and a, b, c, and d meet at least one of the following conditions: 0<a≤0.40; 0<b≤0.40; 0.70≤c<1.00 and/or 4.0≤d≤18.0. The electrolyte in the present invention greatly improves the cycling and safety performance of the lithium-ion battery. The lithium-ion battery in the present invention not only has a high capacity and high initial Coulombic efficiency, but also has excellent cycling performance and safety properties.

Anmelder

Firma

Techtronic Cordless GP

Land

🇺🇸 USA