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. 01, 2017
Filed:
Nov. 18, 2015
Iljin Electric Co., Ltd., Hwaseong, KR;
Cheol-Ho Park, Hwaseong, KR;
Seon-Kyong Kim, Hwaseong, KR;
Young-Pil Choi, Hwaseong, KR;
Min-Hyun Kim, Hwaseong, KR;
Myeong-Han Kim, Hwaseong, KR;
ILJIN ELECTRIC CO., LTD., Hwaseong, KR;
Abstract
The present invention provides a negative active material for a secondary battery with an improved expansion rate, which is formed by a formula below, and in which an expansion rate of the negative active material after 50 cycles is 70 to 150%, and an amorphization degree on a matrix within an alloy has a range of 25% or more, and Si has a range of 60 to 70%, Ti has a range of 9 to 14%, Fe has a range of 9 to 14%, and Al has a range larger than 1% and less than 20%. Formula: SiTiFeAl(x, y, z, and u are at %, x: 1−(y+z+u)).