公开(公告)号：US20230261178A1

公开(公告)日：2023-08-17

申请号：US17971500

申请日：2022-10-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bangrun WANG ,  Na LIU ,  Chengdu LIANG ,  Yongchao LIU ,  Xin SUN ,  Haotian XIE

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/58 ,  H01M4/04

CPC classification number: H01M4/366 ,  H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/5825 ,  H01M4/0404 ,  H01M2004/028

Abstract: This application provides a composite positive-electrode material and a preparation method thereof, a positive-electrode plate, a secondary battery, and a battery module, a battery pack, and an apparatus containing such secondary battery. The composite positive-electrode material includes a core and a coating layer covering at least part of a surface of the core, where the core includes a positive-electrode pre-lithiation material, the positive-electrode pre-lithiation material includes a lithium-rich metal oxide, and the coating layer includes a positive-electrode active material.

公开(公告)号：US20230124703A1

公开(公告)日：2023-04-20

申请号：US17903054

申请日：2022-09-06

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jianren WEI ,  Xin SUN ,  Lili WU ,  Xuan LI ,  Huisen SU ,  Xingbu CHEN

IPC: H01M4/04 ,  H01M4/62 ,  H01M4/38

Abstract: Provided in the present application is a negative electrode plate, a secondary battery, a battery module, a battery pack and a power consuming device. The negative electrode plate may comprise a first coating, a second coating and a current collector, the current collector being on one side of the second coating, the first coating being on the other side of the second coating, the first coating and the second coating each comprising a silicon-based material, wherein a molar ratio of element O to element Si of the silicon-based material in the first coating may be 0.5 to 1.5, and a molar ratio of element O to element Si of the silicon-based material in the second coating may be less than or equal to 0.3.