Patent ID: 11967731
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, comprising:
a porous polymer substrate having a plurality of pores; and
a porous coating layer on at least one surface of the porous polymer substrate, wherein the porous coating layer comprises boehmite particles and a binder polymer, wherein the binder polymer is positioned on at least a part of a surface of the boehmite particles and connects and fixes the boehmite particles with one another,
wherein the boehmite particles have an average particle diameter of 2.0 μm to 3.5 μm and a specific surface area of 4.0 m2/g to 4.5 m2/g,
wherein the porous coating layer has a thickness of 2 μm to 10 μm, and
wherein an adhesion strength of the separator to an electrode (Lami strength) is 20 gf/15 mm or more, and a resistance of the separator is 0.90 ohm or less.