Positivelektrodenfolie und Herstellungsverfahren Dafür, Sekundärbatterie und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4712160

Anmeldetag

16. Oktober 2023

Veröffentlichung

21. November 2024

Rechtsraum

EP

IPC

H01M4/36, H01M10/0525[A] 5 * claim 1 *

Abstract

A positive electrode plate, a preparation method thereof, a secondary battery, and an electric apparatus are provided. The positive electrode plate includes a current collector and a positive electrode film layer disposed on at least one side of the current collector, where the positive electrode film layer includes a positive electrode active material, and the positive electrode active material includes a substrate and a carbon coating layer disposed on a surface of the substrate. The substrate has a general formula Li<z>Fe<x>Mn<(1-x-y)>M<y>PO<4>, where 1≤z≤1.1; 0.5≤x≤1; 0≤y≤0.1; and M is at least one selected from Ti, V, and Mg. At least a portion of the positive electrode active material includes primary particles, and a particle size distribution of primary particles having a primary particle size greater than 80 nm and less than or equal to 180 nm in the positive electrode active material is less than or equal to 10%; and there are no more than 15 primary particles having a primary particle size greater than 1500 nm in a region of (250±5) µm<2> in a cross section obtained by cutting an electrode plate prepared from the positive electrode active material. The primary particle size distribution concentration of the positive electrode active material in the positive electrode plate provided by this application is significantly improved, improving the cycling performance of batteries.

Anmelder

Firmen

Contemporary Amperex Technology Co., Limited
Hunan Yuneng New Energy Battery Materials Co., Ltd.

Land

🇨🇳 China

Fachgebiete