公开(公告)号：US20240282938A1

公开(公告)日：2024-08-22

申请号：US18651716

申请日：2024-05-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yinghua ZHU ,  Songjun SHI ,  Youlei LAI ,  Xing TONG

IPC: H01M4/36 ,  C01B25/45 ,  C01G53/00 ,  H01M4/02 ,  H01M4/131 ,  H01M4/136 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M10/0525

CPC classification number: H01M4/366 ,  C01B25/45 ,  C01G53/44 ,  H01M4/131 ,  H01M4/136 ,  H01M4/364 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0525 ,  C01P2002/50 ,  C01P2004/30 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2220/20

Abstract: This application provides a positive electrode plate, a lithium-ion secondary battery, a battery module, a battery pack, and an electrical device. The positive electrode plate of this application includes: a current collector, a first coating layer applied on both sides of the current collector, and a second coating layer applied on a surface of the first coating layer. The first coating layer contains a small-grained olivine-structured phosphate compound, and a particle diameter of the small-grained olivine-structured phosphate compound is 0.5 to 2 μm. The second coating layer contains: a large-grained olivine-structured phosphate compound and a layered transition metal oxide; or a large-grained olivine-structured phosphate compound and a pure layered transition metal oxide. A particle diameter of the large-grained olivine-structured phosphate compound is larger than a particle diameter of the small-grained olivine-structured phosphate compound.

公开(公告)号：US20230395938A1

公开(公告)日：2023-12-07

申请号：US18344980

申请日：2023-06-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xing TONG ,  Songjun SHI ,  Youlei LAI ,  Yinghua ZHU ,  Jingru LI

IPC: H01M50/446 ,  H01M50/491 ,  H01M50/403

CPC classification number: H01M50/446 ,  H01M50/491 ,  H01M50/403

Abstract: Provided are a separator for a secondary battery and a preparation method therefor, and a secondary battery including the separator, a battery module, a battery pack, and a power consuming device. The separator for a secondary battery of the present application includes a substrate layer and a nanofiber layer provided on one surface of the substrate layer. The nanofiber layer includes a lithium supplementing agent, a polymer, and an optional conductive material; and in the total weight of the nanofiber layer, the content of the lithium supplementing agent accounts for 30.0-50.0% by weight, the content of the polymer accounts for 50.0-70.0% by weight, and the content of the conductive material accounts for 0-5.0% by weight.