| abstract |
The application provides a separator and a lithium ion battery, and the separator includes: a first porous substrate; a second porous substrate; and a third porous substrate; wherein, the second porous substrate is arranged on the first porous substrate Between the porous substrate and the third porous substrate, the tensile strength of the isolation membrane in the longitudinal direction is greater than the tensile strength of the isolation membrane in the transverse direction. The thermal stability and safety performance of the lithium ion battery can be improved by adopting the separator of the present application. |