公开(公告)号：US20190319243A1

公开(公告)日：2019-10-17

申请号：US16013887

申请日：2018-06-20

Applicant: Ningde Amperex Technology Limited

Inventor： Jianjian Yi ,  Xinzhi Zhang ,  Zengbin Wei ,  Xinghua Tao

IPC: H01M2/16 ,  H01M10/0525 ,  H01M2/14

Abstract: The application provides a separator and an energy storage device. The separator comprises: a porous substrate; and a porous layer arranged on a surface of the porous substrate, wherein the porous layer comprises inorganic particles and a binder, and a ratio of Dv90 of the inorganic particles to the thickness of the porous layer is in a range from 0.3 to 3.0. Excellent adhesion exists between the separator and the electrode according to the present application, which ensures that the energy storage device has good safety performance. Moreover, the rate performance and cycle performance of the energy storage device can be greatly improved due to the existence of inorganic particles in the separator.