Sekundärbatterie, Elektrische Vorrichtung und Positivelektrodenaktivmaterial

Details

Veröffentlichungs-Nr.

EP4723222

Anmeldetag

30. August 2024

Veröffentlichung

27. November 2025

Rechtsraum

EP

Abstract

A secondary battery, an electric device, and a positive electrode active material are provided. The secondary battery includes a positive electrode sheet, a negative electrode sheet, a separator disposed between the positive electrode sheet and the negative electrode sheet, and an electrolytic solution including an organic solvent and a lithium salt; where the positive electrode sheet includes a positive electrode current collector and a positive electrode film layer located on at least one surface of the positive electrode current collector, the positive electrode film layer includes a positive electrode active material; the positive electrode active material includes a lithium transition metal oxide, the lithium transition metal oxide includes element nickel and element cobalt, and includes at least one of element manganese and element aluminum; in the lithium transition metal oxide, a molar content of the element nickel is 85mol% or higher based on all metal elements except lithium; and in a DTG curve obtained by heating the positive electrode active material at a heating rate of 10°C/min, an absolute value of a peak value of a thermogravimetric change rate of the positive electrode active material is less than 7%/min.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China