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:
Jun. 24, 2025
Filed:
Sep. 25, 2020
Btr New Material Group Co., Ltd., Guangdong, CN;
Dingyuan New Energy Technology Co., Ltd., Guangdong, CN;
Chunlei Pang, Guangdong, CN;
Yiming Kong, Guangdong, CN;
Tengyu Liang, Guangdong, CN;
Jianguo Ren, Guangdong, CN;
Xueqin He, Guangdong, CN;
BTR NEW MATERIAL GROUP CO., LTD., Guangdong, CN;
DINGYUAN NEW ENERGY TECHNOLOGY CO., LTD., Guangdong, CN;
Abstract
Provided are a composite negative electrode material, a preparation method therefor and a lithium battery. The composite negative electrode material comprises silicon-containing particles and a carbon coating layer coating at least part of the surface of silicon-containing particles. In Raman spectrum, the composite negative electrode material has a silicon characteristic peak A between 450 cm-550 cm, a carbon characteristic peak B between 1300 cm-1400 cm, a carbon characteristic peak C between 1530 cm-1630 cm, and a graphene structure characteristic peak D between 2500 cm-2750 cm. The preparation method comprises: in protective atmosphere, introducing reaction gas to react with silicon-containing particles, the reaction temperature being 700° C.-1450° C., and the reaction gas comprising a carbon-containing gas, so that at least part of the surface of silicon-containing particles form a carbon coating layer, so as to obtain the composite negative electrode material.