公开(公告)号：EP4299650A1

公开(公告)日：2024-01-03

申请号：EP22932482.7

申请日：2022-08-18

申请人： Jingmen Gem Co., Ltd

发明人： XU, Kaihua ,  YUE, Xianjin ,  ZHANG, Kun ,  HUA, Wenchao ,  LI, Cong ,  YANG, Xing ,  LV, Hao ,  YUAN, Wenfang ,  JIA, Dongming ,  XUE, Xiaofei ,  LI, Xueqian ,  FAN, Liangjiao ,  XIANG, Xing ,  ZHU, Xiaoshuai ,  SHI, Jiamin ,  GONG, Zhengjie ,  YIN, Daodao

IPC分类号： C08G83/00 ,  H01M4/13 ,  H01M10/0525 ,  C01G53/00

摘要： The present application provides a core-shell gradient ternary precursor and a preparation method and application thereof. The preparation method includes the following steps: (1) mixing a terephthalic acid solution with alkaline liquor to obtain a terephthalic acid salt solution, adding a nickel source solution for a reaction to obtain a Ni-MOF solution, mixing the Ni-MOF solution with ammonia water, and adjusting a pH value to obtain a base solution; and (2) adding a nickel-cobalt-manganese ternary mixed salt solution, a liquid alkali solution, and an ammonia-water solution simultaneously to the base solution obtained in step (1) for a co-precipitation reaction, and obtaining the core-shell gradient ternary precursor after aging treatment. The present application pre-prepares Ni-MOF, uses Ni-MOF as a core for the co-precipitation reaction, and prepares to obtain the core-shell like precursor with a gradient. In a process of preparing a positive electrode material, carbon in the core of the core-shell gradient ternary precursor reacts with oxygen, thereby reducing a nickel oxidation state on particle surfaces and reducing generation of cracks.