Patent ID: 11929458
Assignee: LG CHEM, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 11:
12. A separator for an electrochemical device obtained by the method as defined by claim 1 comprising:
the porous substrate and the inorganic coating layer formed on at least one surface of the porous substrate,
wherein the inorganic coating layer comprises the inorganic particles and the binder resin,
the separator shows a difference in air permeation time less than 40% as determined according to Formula 1, and
the inorganic coating layer comprises the binder resin and the inorganic particles at a weight ratio of 30:70-60:40,

difference in air permeation time (%)={(air permeation time of separator−air permeation of porous substrate)/air permeation time of porous substrate}×100.  [Formula 1]