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:
Mar. 26, 2024
Filed:
Jan. 20, 2020
Lg Energy Solution, Ltd., Seoul, KR;
LG Energy Solution, Ltd., Seoul, KR;
Abstract
Provided is a negative electrode active material for a lithium secondary battery which includes: a silicon-silicon oxide-magnesium silicate composite comprising a silicon oxide (SiO, 0<x≤2) matrix; and silicon (Si) crystal grains, MgSiOcrystal grains and MgSiOcrystal grains present in the silicon oxide matrix, wherein the MgSiOcrystal grains have a crystal size of 5-30 nm and the MgSiOcrystal grains have a crystal size of 20-100 nm in the silicon-silicon oxide-magnesium silicate composite, and the content ratio of MgSiOcrystal grains to MgSiOcrystal grains is 2:1-1:1 on the weight basis. A method for preparing the negative electrode active material for a lithium secondary battery is also provided.