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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.:

US 11824184 B1

PDFFull Text
Date of Patent:
Nov. 21, 2023

Filed:

Nov. 08, 2022

Negative electrode active material, negative electrode including the same and lithium secondary battery including the same

Applicant:

Lg Energy Solution, Ltd., Seoul, KR;

Inventors:

Sun-Young Shin, Daejeon, KR;

Dong-Hyuk Kim, Daejeon, KR;

Yong-Ju Lee, Daejeon, KR;

Rae-Hwan Jo, Daejeon, KR;

Je-Young Kim, Daejeon, KR;

Assignee:

LG ENERGY SOLUTION, LTD., Seoul, KR;

Attorney:

Morgan, Lewis & Bockius LLP

Primary Examiner:

Yoshitoshi Takeuchi

Int. Cl.
CPC ...
H01M 4/1393 (2010.01); H01M 4/133 (2010.01); H01M 4/1395 (2010.01); H01M 4/134 (2010.01); H01M 4/131 (2010.01); H01M 4/04 (2006.01); H01M 4/1391 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/131 (2013.01); H01M 4/0471 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/1391 (2013.01); H01M 4/1393 (2013.01); H01M 4/1395 (2013.01); H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01);
Abstract

Disclosed is a negative electrode active material which includes: a silicon oxide composite including i) Si, ii) a silicon oxide represented by SiO(0<x≤2), and iii) magnesium silicate containing Si and Mg; and a carbon coating layer positioned on the surface of the silicon oxide composite and including a carbonaceous material, wherein X-ray diffractometry of the negative electrode active material shows peaks of MgSiOand MgSiOat the same time and shows no peak of MgO; the ratio of peak intensity, I (MgSiO)/I (MgSiO), which is intensity I (MgSiO) of peaks that belong to MgSiOto intensity I (MgSiO) of peaks that belong to MgSiOis smaller than 1, the peaks that belong to MgSiOare observed at 2θ=32.2±0.2°, and the peaks that belong to MgSiOare observed at 2θ=30.9±0.2°.

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