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:
Dec. 22, 2020
Filed:
Nov. 27, 2015
Lg Chem, Ltd., Seoul, KR;
Hyun Chul Kim, Daejeon, KR;
Yong Ju Lee, Daejeon, KR;
Yoon Ah Kang, Daejeon, KR;
Eun Kyung Kim, Daejeon, KR;
Abstract
A negative electrode active material of the present invention includes a core containing silicon-based nanoparticles and polymer carbides distributed on the nanoparticles, wherein the core has a size of 30-300 nm, and such a negative electrode active material is prepared using a method including dispersing a suspension in which silicon-based nanoparticles and water-soluble polymer are added to a solvent using ultrasonic waves; and preparing a core including the silicon-based nanoparticles having the polymer carbides on the surface by carbonizing the water-soluble polymer. As a result, a negative electrode active material having a significantly low volume expansion rate compared with general non-carbon-based negative electrode active materials, and having excellent electric conductivity may be provided.