Lithiumsekundärbatterie, Herstellungsverfahren dafür und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4773302

Anmeldetag

9. August 2024

Veröffentlichung

12. Juni 2025

Rechtsraum

EP

Abstract

A lithium secondary battery, a preparation method therefor, and an electrical apparatus are provided. The lithium secondary battery includes an electrolyte solution, the electrolyte solution including a first solvent, a first additive, and a second additive, and the first solvent including a carboxylic ester compound. A reduction potential of the carboxylic ester compound relative to Li⁺/Li is less than or equal to 1.4 V, a reduction potential of the first additive relative to Li⁺/Li is greater than or equal to 1.4 V, and a reduction potential of the second additive relative to Li⁺/Li is greater than or equal to 1.0 V and less than 1.4 V. According to the lithium secondary battery, the stability and compactness of an SEI film are improved by means of improving an electrolyte solution, thereby reducing the degree of gas production during cycling and storage of the lithium secondary battery and comprehensively improving the performance of the lithium secondary battery.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China