Positivelektrodenfolie, Batteriezelle, Batterie und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4742315

Anmeldetag

24. Oktober 2023

Veröffentlichung

23. Januar 2025

Rechtsraum

EP

IPC

H01M4/131, H01M10/0525

Abstract

A positive electrode sheet, a battery cell, a battery, and an electric device relate to the technical field of batteries. The positive electrode sheet includes a positive electrode current collector, and a first positive electrode active material layer and a second positive electrode active material layer which are sequentially arranged on the surface of the current collector. The lattice volume shrinkage of a first positive electrode active material is greater than that of a second positive electrode active material, and the mass percentage of a binder in the first positive electrode active material layer is 0.8 wt% to 1.5 wt%. By limiting the upper limit of the amount of the binder in the first positive electrode active material layer, the first positive electrode active material layer would not be allowed to include more other components such as a positive electrode active material, and the overall energy density and specific capacity of the battery cell or the battery are met. Additionally, the lower limit of the amount of the binder in the first positive electrode active material layer can also be limited, thereby improving the binding performance between the first positive electrode active material layer and the positive electrode current collector and between the first positive electrode active material layer and the second positive electrode active material layer, and preventing a coating from falling off.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China

Fachgebiete