Lithiumsekundärbatterie und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4718557

Anmeldetag

16. August 2023

Veröffentlichung

5. Dezember 2024

Rechtsraum

EP

Abstract

The present application discloses a lithium secondary battery and an electrical apparatus. The lithium secondary battery includes a positive electrode plate and an electrolyte solution, where the positive electrode plate includes a positive electrode active material layer containing a positive electrode active material, and the positive electrode active material includes at least one doping element selected from aluminum, zirconium, boron, magnesium, zinc, calcium and titanium; the electrolyte solution includes a silane-based first additive containing C2-C8 alkenyl and a second additive, and the second additive is selected from at least one of lithium fluorosulfonate, lithium bis(fluorosulfonyl)imide and lithium tetrafluoroborate; and the ratio of the mass percentage content W1 of the first additive in the electrolyte solution to the mass percentage content W2 of the second additive in the electrolyte solution to the mass percentage content W3 of the doping element in the positive electrode active material satisfies 1:(0.2-2):(0.1-0.5). The lithium secondary battery of the present application has good cycling performance, kinetic performance and storage life.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China