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. 26, 2023
Filed:
Jun. 24, 2020
Samsung Sdi Co., Ltd., Yongin-si, KR;
Daehyun Hong, Suwon-si, KR;
Dowon Kim, Suwon-si, KR;
Taejoon Park, Suwon-si, KR;
Imhyuck Bae, Suwon-si, KR;
Jaehyun Cho, Suwon-si, KR;
Suna Lee, Suwon-si, KR;
SAMSUNG SDI CO., LTD., Yongin-si, KR;
Abstract
A separator for a rechargeable battery, a method of preparing a separator, and a rechargeable lithium battery, the separator including a porous substrate; and at least one coating layer on one surface of the porous substrate, wherein the coating layer includes a fluorine-containing binder, a filler, and an additive, the fluorine-containing binder has a concentration gradient in which a concentration thereof in the coating layer increases toward an outer surface of the separator in a thickness direction of the separator, an infrared spectral intensity of a C—F group of the fluorine-containing binder is greater than 0.0030 to less than 0.0050, the additive is a hydrocarbon polymer compound that includes a carboxyl group, and a weight average molecular weight of the hydrocarbon polymer compound is about 5,000 g/mol to about 15,000 g/mol.