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:
Jul. 08, 2025
Filed:
Sep. 12, 2023
SK Innovation Co., Ltd., Seoul, KR;
SK on Co., Ltd., Seoul, KR;
Kwang Ho Jeong, Daejeon, KR;
Seung Deok Seo, Daejeon, KR;
Jae Young Choi, Daejeon, KR;
Sung Do Kim, Daejeon, KR;
Jeong A Kim, Daejeon, KR;
Do Ae Yu, Daejeon, KR;
Yong Seok Lee, Daejeon, KR;
SK INNOVATION CO., LTD., Seoul, KR;
SK ON CO., LTD., Seoul, KR;
Abstract
An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on at least one surface of the anode current collector. The anode active material layer includes an anode active material and an anode binder. The anode active material includes a plurality of composite particles, each of the composite particles include a silicon-based active material particle, and a solid electrolyte interphase (SEI) layer formed on at least a portion of a surface of the silicon-based active material particle. A relative standard deviation of thickness values of the SEI layer of the composite particles, which are measured by an X-ray photoelectron spectroscopy (XPS) from 9 different composite particles among the plurality of composite particles after repeating 100 cycles of charging and discharging is 20% or less.