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:
Oct. 14, 2025
Filed:
Mar. 03, 2022
SK on Co., Ltd., Seoul, KR;
Hee Gyoung Kang, Daejeon, KR;
Gi Hyeon Moon, Daejeon, KR;
So Hyun Park, Daejeon, KR;
Mi Ryeong Lee, Daejeon, KR;
Jong Hyuk Lee, Daejeon, KR;
Chan Young Jeon, Daejeon, KR;
Hae Suk Hwang, Daejeon, KR;
SK ON CO., LTD., Seoul, KR;
Abstract
The lithium secondary battery includes a cathode which includes a cathode active material layer including a cathode current collector, a cathode tab protruding from one end thereof in a longitudinal direction of the cathode current collector, a second cathode portion disposed spaced apart from the cathode tab on the cathode current collector, and a first cathode portion disposed adjacent to the cathode tab on the cathode current collector and having an electrode density higher than that of the second cathode portion, and an anode disposed to face the cathode. Life-span characteristics of the lithium secondary battery may be improved by controlling the electrode density in the peripheral part of the cathode tab.