Preparation method of fast ion conductor Li2ZrO3 coated high-nickel NCM lithium ion battery positive electrode material

• Main Authors: SHANG PENGKUN, QIAN ZHITING, MAO QINZHONG, XU WANRUN, WU HAIJUN, LYU YUCHEN, LIU HUANCHAO, TIAN JUNWU
• Format: Patent
• Language: Chinese; English
• Published: 13.01.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to the technical field of mobile electronic equipment batteries, electric vehicles and hybrid electric vehicle lithium ion batteries, in particular to a preparation method of a fast ion conductor Li2ZrO3 coated high-nickel NCM lithium ion battery positive electrode material. According to the method, the raw materials for synthesizing the Li2ZrO3 coating agent are directly mixed with the ternary positive electrode material, then the Li2ZrO3 is synthesized by reacting on the surface of the ternary material through sintering, and the Li2ZrO3 is directly coated on the surface of the material, so that the method is simple in process and large in coating area, and the coating agent is not easy to agglomerate, is not easy to fall off after coating and is stable in coating. The coated Ni < 3 +/4 + > with strong oxidizing property can be prevented from being in contact with air or electrolyte, and the storage performance, the interface stability and the interface ion diffusion capability of the m