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:
Aug. 05, 2025
Filed:
Dec. 05, 2023
Applicants:
SK on Co., Ltd., Seoul, KR;
SK Innovation Co., Ltd., Seoul, KR;
Inventors:
Assignees:
SK ON CO., LTD., Seoul, KR;
SK INNOVATION CO., LTD., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/134 (2010.01); H01M 4/133 (2010.01); H01M 4/1393 (2010.01); H01M 4/1395 (2010.01); H01M 4/36 (2006.01); H01M 4/48 (2010.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 10/42 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01);
U.S. Cl.
CPC ...
H01M 4/134 (2013.01); H01M 4/133 (2013.01); H01M 4/1393 (2013.01); H01M 4/1395 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 4/483 (2013.01); H01M 4/587 (2013.01); H01M 4/622 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); H01M 10/4235 (2013.01); H01M 2004/027 (2013.01); H01M 4/0404 (2013.01); H01M 4/0471 (2013.01);
Abstract
An anode active material for a secondary battery includes an anode current collector, and an anode active material layer 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 composite particle that includes 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. An F-density defined by Equation 1 is 23% or less.