Positivelektrodenfolie und Herstellungsverfahren Dafür, Batterie und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4773214

Anmeldetag

22. Juli 2024

Veröffentlichung

30. Mai 2025

Rechtsraum

EP

IPC

H01M4/136, H01M4/36

Abstract

A positive electrode sheet and a preparation method therefor, a battery and an electric device. The positive electrode sheet comprises a positive current collector and a positive active layer arranged on at least one surface of the positive current collector, wherein the positive active layer comprises a first active layer and a second active layer, and the second active layer is located between the positive current collector and the first active layer; and the first active layer comprises a first positive active material, and the second active layer comprises a second positive active material, the operating voltage interval of the first positive active material being greater than the operating voltage interval of the second positive active material, and the operating voltage interval of the second positive active material being less than or equal to 3.0 V. The first positive active material starts to be attenuated after a relatively large voltage plateau, and the effect of continuing an operating voltage is achieved by means of the lower operating voltage interval of the second positive active material, thus expanding the voltage interval range of high-power discharge; in addition, the second positive active material still has reaction activity in a relatively low state of charge, and thus has a good discharge capacity.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China

Fachgebiete