公开(公告)号：EP4299530A1

公开(公告)日：2024-01-03

申请号：EP22899967.8

申请日：2022-08-18

申请人： Jingmen Gem Co., Ltd

发明人： XU, Kaihua ,  ZHANG, Kun ,  JIA, Dongming ,  LI, Cong ,  YANG, Xing ,  XUE, Xiaofei ,  FAN, Liangjiao ,  CHEN, Xiaofei ,  LI, Xueqian ,  ZHU, Xiaoshuai ,  LV, Hao ,  YUAN, Wenfang ,  WANG, Ding ,  YUE, Xianjin

IPC分类号： C01G53/00

摘要： A high-nickel ternary core-shell precursor for a lithium battery, a positive electrode material and a preparation method therefor. The chemical structural formula of the precursor is zNi(C 4 H 7 N 2 O 2 ) 2 -Ni x-z M1 y M2 1-x-y (OH) 2 , wherein M1 and M2 are two of cobalt, aluminum, and manganese. The preparation method comprises: pumping a prepared metal salt solution, a dimethylglyoxime-ammonia water composite solution, and an ammonia water solution into a reaction kettle, maintaining the pH of a reaction system, and controlling the reaction time to obtain a sphere-like precursor inner core with a structural formula of Ni(C 4 H 7 N 2 O 2 ) 2 ; pumping the metal salt solution and the ammonia water solution, stopping pumping the dimethylglyoxime-ammonia water composite solution, pumping a sodium hydroxide solution to obtain a sphere-like core-shell precursor, washing, drying, sieving and deironing the precursor, mixing with a lithium source, and calcining to prepare the positive electrode material. The material can keep high capacity and also has excellent cycle performance.