公开(公告)号：US20180069220A1

公开(公告)日：2018-03-08

申请号：US15809224

申请日：2017-11-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chenglong YUAN ,  Ning PENG ,  Chao GUO ,  Shengwu ZHANG

IPC: H01M2/16 ,  H01M10/0525

CPC classification number: H01M2/1686 ,  H01M2/14 ,  H01M2/16 ,  H01M2/1633 ,  H01M2/1653 ,  H01M2/1666 ,  H01M10/0525

Abstract: There is provided a composite separator for a lithium-ion battery, including a polyolefin substrate and a coating layer containing a binder and inorganic particles formed on a surface of the polyolefin substrate, a hydrogen bond being formed between the binder and the inorganic particles. Also provided are a method for preparing the composite separator for a lithium-ion battery and a lithium-ion battery using the composite separator. The composite separator of the present application increases adhesion force between the substrate and the inorganic particles, thereby reducing detachment of the inorganic particles. By using the composite separator, the product quality of the battery is improved, and the risk of influencing the safety performance of the battery caused by the detachment of the inorganic particles in a production process is reduced.