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.