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:
Nov. 21, 2017
Filed:
Jul. 02, 2014
Jiangsu Huadong Institute of Li-ion Battery Co. Ltd., Zhangjiagang, CN;
Tsinghua University, Beijing, CN;
Qing-Wei Cui, Beijing, CN;
Jian-Jun Li, Beijing, CN;
Xiang-Ming He, Beijing, CN;
Jiang Cao, Beijing, CN;
Li Wang, Beijing, CN;
Zhong-Jia Dai, Beijing, CN;
Jiangsu Huadong Institute of Li-ion Battery Co. Ltd., Zhangjiagang, CN;
Tsinghua University, Beijing, CN;
Abstract
A method for making a lithium ion battery anode active material comprising: providing silicon particles and a silane coupling agent, wherein the silane coupling agent comprises a hydrolysable functional group and an organic functional group; mixing the silicon particles and the silane coupling agent in water to obtain a first mixture; adding a monomer or oligomer to the first mixture to obtain a second mixture, the surfaces of the silicon particles being coated with a polymer layer by in situ polymerization method to obtain silicon polymer composite material, the monomer or the oligomer reacting with the organic functional group of the silane coupling agent in a polymerization, thereby a generated polymer layer being chemically grafted on the surfaces of the silicon particles; and heating the silicon polymer composite material to carbonize the polymer layer to form a carbon layer coated on the surfaces of the silicon particles.