Patent ID: 11949125
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A separator for an electrochemical device, the separator comprising:
a porous polymer substrate; and
a porous coating layer on at least one side of the porous polymer substrate,
wherein
the porous coating layer comprises first binder particles, second binder particles, and inorganic particles,
a majority of the inorganic particles are dispersed in a first surface region of the porous coating layer, the first surface region facing the porous polymer substrate,
a majority of the second binder particles are dispersed in a second surface region of the porous coating layer, the second surface region being an opposite surface region to the first surface region, and
the inorganic particles have a larger weight per particle than each respective weight per particle of the first and second binder particles.