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:
Feb. 25, 2025
Filed:
Aug. 07, 2020
Lg Chem, Ltd., Seoul, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
A separator for a lithium secondary battery is provided. The separator includes a porous polymer substrate and a porous coating layer positioned on at least one surface of the porous polymer substrate. The porous coating layer includes inorganic particles and a binder polymer. The binder polymer includes a PVdF-based binder polymer, and the PVdF-based binder polymer has a first peak at a 2θ of 18.2±0.2° and a second peak at a 2θ of 19.8±0.2°, as analyzed by X-ray diffractometry (XRD), and a ratio of an area of the second peak to an area of the first peak (the area of the second peak/the area of the first peak) is equal to or more than 1.25 and less than 2.75. The separator for the lithium secondary battery includes fine and uniform pores formed on the surface thereof to provide an increased adhesive surface area to an electrode, resulting in improvement of adhesion to the electrode.