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. 31, 2024
Filed:
Oct. 28, 2020
Btr New Material Group Co., Ltd., Guangdong, CN;
Chunlei Pang, Guangdong, CN;
Lijuan Qu, Guangdong, CN;
Zhiqiang Deng, Guangdong, CN;
Jianguo Ren, Guangdong, CN;
Xueqin He, Guangdong, CN;
BTR NEW MATERIAL GROUP CO., LTD., Guangdong, CN;
Abstract
The present application provides a silicon-oxygen composite negative electrode material and method for preparation thereof and lithium-ion battery. The silicon-oxygen composite negative electrode material comprises a silicon-oxygen composite negative electrode material comprising SiO, non-LiSiOlithium-containing compound, and LiSiO; said LiSiOis coated on the surface of the non-LiSiOlithium-containing compound; 0≤x≤1.2. The preparation method comprises: mixing a first silicon source with a reducing lithium source and roasting, to obtain a composite material containing a non-LiSiOlithium-containing compound; the composite material containing the non-LiSiOlithium-containing compound is fused with a second silicon source and then subjected to heat treatment to obtain a silicon-oxygen composite negative electrode material. The silicon-oxygen composite anode material provided by the present application is coated with LiSiO, solving the problem in the prior art of a negative electrode material producing strong alkaline or easily soluble by-products in water after pre-lithiation and affecting subsequent processing.