Lithiumsekundärbatterie und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4738459

Anmeldetag

13. Mai 2024

Veröffentlichung

27. Februar 2025

Rechtsraum

EP

Abstract

A lithium secondary battery and an electric device. The lithium secondary battery comprises a positive electrode sheet, the positive electrode sheet comprises a first active layer coated on at least one side of a positive electrode current collector and containing a positive electrode active material and a polycrystalline lithium supplementing agent and a second active layer coated on the side of the first active layer away from the current collector and containing a positive electrode active material, and the lithium supplementing agent comprises at least one of LixNi1-yMyO2, LixRO2, and LiNi α Co β Mn γ O2, wherein M comprises one or more of Cu, Al, and Mn; R comprises one of Ni and Mn; 1 < x < 2, 0 < y ≤ 0.01, α + β + γ =1 and α ≥ 0.5. The lithium supplementing agent rapidly releases sufficient active lithium during initial charge, thereby improving the energy density of a secondary battery, and persistently releases active lithium during a cycle, thereby slowing down the attenuation of a battery cell.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China