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:
Aug. 07, 2018
Filed:
Mar. 15, 2017
Tohoku University, Miyagi, JP;
Dowa Holdings Co., Ltd., Tokyo, JP;
Norihiro Shimoi, Miyagi, JP;
Kazuyuki Tohji, Miyagi, JP;
Yasumitsu Tanaka, Miyagi, JP;
Qiwu Zhang, Miyagi, JP;
Hiroyuki Kai, Tokyo, JP;
TOHOKU UNIVERSITY, Miyagi, JP;
DOWA HOLDINGS CO., LTD., Tokyo, JP;
Abstract
A negative electrode active material for a lithium ion secondary battery, comprising silicon, copper and oxygen as major constitutional elements, the negative electrode active material for a lithium ion secondary battery, containing fine particles of silicon having an average crystallite diameter (D) measured by an X-ray diffractometry of 50 nm or less, and having elemental ratios, expressed by molar ratios, Cu/(Si+Cu+O) and O/(Si+Cu+O) of from 0.02 to 0.30, wherein the negative electrode active material contains an intermetallic compound of silicon and copper.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile