Separator für eine Wiederaufladbare Lithiumbatterie und Wiederaufladbare Lithiumbatterie damit

Details

Veröffentlichungs-Nr.

EP4742412

Anmeldetag

6. November 2025

Veröffentlichung

13. Mai 2026

Rechtsraum

EP

Abstract

A separator for a rechargeable lithium battery includes a porous substrate, and a coating layer located on at least one surface of the porous substrate. The coating layer includes a binder, the binder includes a copolymer including a first structural unit including a unit derived from an aromatic-based unsaturated monomer; a second structural unit derived from a (meth)acrylic monomer containing an alkyl group with 4 or more carbon atoms in the main chain of the ester moiety; and a third structural unit derived from a sulfonic acid group-containing monomer. Based on 100 mol% of the copolymer, the first structural unit is included in an amount of from about 5 mol% to about 80 mol%, the second structural unit is included in an amount of from about 10 mol% to about 40 mol%, and the third structural unit is included in an amount of from about 5 mol% to about 80 mol%.

Anmelder

Firma

SAMSUNG SDI CO., LTD.

Land

🇰🇷 Südkorea