Patent ID: 11936065
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A separator for an electrochemical device comprising:
a porous substrate,
wherein the porous substrate has a porosity of 40% to 70%,
wherein the porous substrate has a mean pore size of 20 nm to 35 nm,
wherein the porous substrate comprises polyethylene having a weight average molecular weight in a range of 200,000 to 500,000, and
wherein the polyethylene has an entangle molecular weight of 2,500 g/mol or less, and
wherein the porous substrate has two peaks comprising a first peak at 130° C. to less than 145° C. and a second peak at 145° C. to 160′C upon an initial scanning in a differential scanning calorimetry (DSC) curve, and
wherein the second peak appears only upon the initial scanning in DSC analysis and is not identified upon a second or later scanning.