Patent ID: 11923496
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A separator for a rechargeable lithium battery, the separator comprising:
a porous substrate; and
a coating layer on at least one surface of the porous substrate,
wherein:
the coating layer includes a binder and inorganic particles, the binder including:
a polyether polyurethane,
a polyvinyl alcohol, and
a cross-linking agent,

the polyether polyurethane and the polyvinyl alcohol are included in a weight ratio of 5:5 to 9:1,
the cross-linking agent includes a carbodiimide compound,
the cross-linking agent is bound to the polyether polyurethane to form a cross-linked polymer, and
a weight average molecular weight of the cross-linked polymer is 500 g/mol to 80,000 g/mol.