公开(公告)号：US20230322579A1

公开(公告)日：2023-10-12

申请号：US18326025

申请日：2023-05-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qiang Chen ,  Qi Wu ,  Jingpeng Fan ,  Tao Huang ,  Na Liu

IPC: C01G53/00 ,  H01M10/0525 ,  C01G51/00 ,  H01M50/204

CPC classification number: C01G53/006 ,  C01G51/006 ,  H01M10/0525 ,  H01M50/204 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40

Abstract: A positive electrode material, including a core and a shell layer are provided. In some embodiments, a molecular formula of the core is Li1+aNixCoyMn1-x-yM1zO2, 0.8≤x

公开(公告)号：US20230083478A1

公开(公告)日：2023-03-16

申请号：US17969630

申请日：2022-10-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qi WU ,  Qiang Chen ,  Jingpeng Fan ,  Tao Huang ,  Qisen Huang

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/485 ,  C01G53/00

Abstract: The present application provides a high-nickel ternary positive electrode active material, which comprises a core Li1+a[LixCoyMnzMb]O2, a fast ionic conductor LiαAlXSiYO4 of a first shell layer, an oxide of an element R of a second shell layer, and a transition layer LipRqOw formed between the first shell layer and the second shell layer. In the high-nickel ternary positive electrode active material of the present application, the surface impurity lithium amount is significantly reduced, and by creatively converting the surface impurity lithium into effective components in the fast ionic conductors LiαAlXSiYO4 and LipRqOw which accelerate the intercalation/deintercalation of lithium ions in the core material, the decomposition and gas production of an electrolyte solution caused by the surface impurity lithium is greatly improved, such that a high-nickel ternary lithium-ion battery has high energy density as well as good cycle performance and safety performance.