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:
Mar. 21, 2017
Filed:
Aug. 18, 2011
Qiang Wang, Shenzhen, CN;
LU Zhang, Shenzhen, CN;
LI MA, Shenzhen, CN;
Yan Zhu, Shenzhen, CN;
Zhenyue Wu, Shenzhen, CN;
Qiang Wang, Shenzhen, CN;
Lu Zhang, Shenzhen, CN;
Li Ma, Shenzhen, CN;
Yan Zhu, Shenzhen, CN;
Zhenyue Wu, Shenzhen, CN;
BYD COMPANY LIMITED, , CN;
Abstract
Methods of preparing negative active materials and negative active materials are provided herein. The preparation methods include: A) mixing a carbon material, an organic polymer, a Sn-containing compound—optionally with water—to obtain a mixed solution system; B) adding a complexing agent into the mixed solution system obtained in step A optionally while stirring to form an intermediate solution; C) adding a reducing agent into the intermediate solution obtained in step B to a reaction product; D) optionally filtering, washing and then drying the reaction product to obtain the negative active material.