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:
Feb. 20, 2024
Filed:
Feb. 18, 2019
Btr New Material Group Co., Ltd., Shenzhen, CN;
Zhiqiang Deng, Shenzhen, CN;
Chunlei Pang, Shenzhen, CN;
Jianguo Ren, Shenzhen, CN;
Youyuan Huang, Shenzhen, CN;
Min Yue, Shenzhen, CN;
BTR NEW MATERIAL GROUP CO., LTD., Shenzhen, CN;
Abstract
The present application provides a composite negative electrode material of a lithium ion battery, a preparation method thereof and the use thereof in a lithium ion battery. The composite negative electrode material includes a SiO-based active material and a polycarbonate coating layer coated on a surface of the SiO-based active material. The method includes: (1) preparing a monomer solution of unsaturated carbonate; (2) polymerizing the monomer in presence of a polymerization catalyst to obtain a polymer solution; and (3) adding a SiO-based active material, water and a polymer catalyst to the polymer solution, and further polymerizing to coat the SiO-based active material, to obtain the composite negative electrode material.