Positivelektrodenaktivmaterial, Herstellungsverfahren Dafür, Sekundärbatterie und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4718534

Anmeldetag

1. Juni 2023

Veröffentlichung

5. Dezember 2024

Rechtsraum

EP

IPC

H01M4/525

Abstract

This disclosure provides a positive electrode active material, a preparation method thereof, a secondary battery, and an electric apparatus. The positive electrode active material is an agglomerate of primary particles. The positive electrode active material internally contains pores located between the primary particles, and the longest connected distance of the pores is not less than 0.5 µm, optionally 1 µm to 5 µm. The positive electrode active material provided by this disclosure can provide expansion space for the anisotropic volume changes of the primary particles inside the positive electrode active material during cycling, thereby extending the cycle life of a battery. In addition, the interconnected pores are conducive to shortening a transmission path for metal ions (such as lithium ions) within the positive electrode active material, facilitating the deintercalation and intercalation of the metal ions, and further enhancing the kinetic performance of the battery and facilitating the capacity utilization of the battery.

Anmelder

Firmen

Contemporary Amperex Technology Co., Limited
Shanghai Jiao Tong University

Land

🇨🇳 China

Fachgebiete