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. 21, 2016
Filed:
Jan. 31, 2012
Changui Jeong, Yongin-si, KR;
Chungyoo Lee, Yongin-si, KR;
Sungwan Moon, Yongin-si, KR;
Jaehyuk Kim, Yongin-si, KR;
Yury Matulevich, Yongin-si, KR;
Seunguh Kwon, Yongin-si, KR;
Yohan Park, Yongin-si, KR;
Jongseo Choi, Yongin-si, KR;
Changui Jeong, Yongin-si, KR;
Chungyoo Lee, Yongin-si, KR;
Sungwan Moon, Yongin-si, KR;
Jaehyuk Kim, Yongin-si, KR;
Yury Matulevich, Yongin-si, KR;
Seunguh Kwon, Yongin-si, KR;
Yohan Park, Yongin-si, KR;
Jongseo Choi, Yongin-si, KR;
Samsung SDI Co., Ltd., Yongin-si, KR;
Abstract
A negative electrode active material and a secondary battery including the same are provided. More particularly, the present disclosure relates to a negative electrode active material including a Si-metal alloy including Si, the Si being present in the Si-metal alloy in an amount of 66 at % or less, and at least a portion of the Si being crystalline Si. The negative active material can provide a high-capacity battery, which can retain high capacity due to little volumetric expansion during charging and discharging, thereby demonstrating an excellent life characteristic of the secondary battery. The negative electrode active material may include a Si-metal alloy including crystalline Si having a crystal grain size of 30 nm or less. Methods of preparing a negative electrode active material and methods of preparing a secondary battery including the same are also disclosed.