公开(公告)号：US20250023042A1

公开(公告)日：2025-01-16

申请号：US18902073

申请日：2024-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Shiyang Cheng ,  Jumpei Shitaba ,  Jianglin Wu ,  Qi Wu

IPC: H01M4/525 ,  H01M4/02 ,  H01M10/0525

Abstract: A positive electrode material, including a substrate and a first region located on a surface of the substrate, where a molar ratio of iodine element to nickel element in the first region is 0.25 to 1.5. In this application, iodine ion lattice doping is introduced into the surface layer of the positive electrode material, so that the structural stability of the positive electrode material under high temperatures and high voltages and the kinetic performance under large-rate charge/discharge conditions are effectively improved, thereby reducing gas production in high-temperature and high-voltage storage and temperature rise under large-rate charge/discharge conditions of the electrochemical device, and improving the comprehensive performance of the electrochemical device.