The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2025
Filed:
Mar. 31, 2021
Lg Energy Solution, Ltd., Seoul, KR;
LG ENERGY SOLUTION, LTD., Seoul, KR;
Abstract
A separator for a lithium secondary battery, a method for manufacturing the same, and a lithium secondary battery including the separator, where the separator includes a porous polymer substrate having a plurality of pores, and a porous coating layer on at least one surface of the porous polymer substrate. The porous coating layer includes a plurality of inorganic particles and a binder polymer. The binder polymer includes a thermosetting phenolic resin having at least one hydroxyl group and at least one aromatic group. When the separator is exposed to high temperature, due to ignition or the like, the thermosetting phenolic resin in the porous coating layer is thermally cured to form a network structure by virtue of the structural characteristics of the separator. As a result, the separator has improved heat resistance as compared to the conventional separators and shows high adhesion to an electrode.