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:
May. 30, 2023
Filed:
Jan. 31, 2019
Lg Chem, Ltd., Seoul, KR;
Sun-Young Shin, Daejeon, KR;
Je-Young Kim, Daejeon, KR;
Yong-Ju Lee, Daejeon, KR;
Rae-Hwan Jo, Daejeon, KR;
Jung-Hyun Choi, Daejeon, KR;
LG Energy Solution, Ltd., Seoul, KR;
Abstract
Disclosed is a negative electrode active material which includes: secondary particles having a plurality of primary particles which include a silicon oxide composite including i) Si, ii) a silicon oxide represented by SiO(0<x≤2), and iii) a metal silicate containing Si and M, wherein M is at least one of Li and Mg; and a first carbon coating layer disposed partially or totally on the surfaces of the primary particles to interconnect and fix the primary particles; and a second carbon coating layer disposed on the surfaces of the secondary particles, wherein the second carbon coating layer has higher crystallinity as compared to the first carbon coating layer, and the primary particles have an average particle diameter (D) of 0.1-3.5 μm. A negative electrode including the negative electrode active material, and a lithium secondary battery including the negative electrode are also disclosed.