Elektrochemische Vorrichtung und Elektronische Vorrichtung damit

Details

Veröffentlichungs-Nr.

EP4773205

Anmeldetag

31. August 2023

Veröffentlichung

6. März 2025

Rechtsraum

EP

IPC

H01M4/131, H01M10/0525

Abstract

An electrochemical apparatus is provided, including a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive electrode current collector and a positive electrode active layer disposed on at least one surface of the positive electrode current collector. The positive electrode active layer includes a central region and an edge region surrounding an outer periphery of the central region, the edge region includes a first positive electrode active material, and the central region includes a second positive electrode active material. A solid-phase diffusion coefficient of the first positive electrode active material is 10<-15> cm<2>/s to 10<-5> cm<2>/s, and a ratio of the solid-phase diffusion coefficient of the first positive electrode active material to a solid-phase diffusion coefficient of the second positive electrode active material is 1:3 to 1:1.05. The above electrochemical apparatus is conducive to reducing a difference in kinetic performance between the central region and the edge region, thereby enhancing overall capacity utilization of the electrochemical apparatus and improving overall performance of the electrochemical apparatus. This application further provides an electronic apparatus using the electrochemical apparatus.

Anmelder

Firma

Ningde Amperex Technology Limited

Land

🇨🇳 China

Fachgebiete