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. 03, 2014
Filed:
Aug. 04, 2009
Joong Kee Lee, Seoul, KR;
Byung Won Cho, Seoul, KR;
Joo Man Woo, Seoul, KR;
Hyung Sun Kim, Seoul, KR;
Kyung Yoon Chung, Seoul, KR;
Won Young Chang, Seoul, KR;
Sang OK Kim, Seoul, KR;
Sang Eun Park, Seoul, KR;
Joong Kee Lee, Seoul, KR;
Byung Won Cho, Seoul, KR;
Joo Man Woo, Seoul, KR;
Hyung Sun Kim, Seoul, KR;
Kyung Yoon Chung, Seoul, KR;
Won Young Chang, Seoul, KR;
Sang Ok Kim, Seoul, KR;
Sang Eun Park, Seoul, KR;
Korea Institute of Science and Technology, Seoul, KR;
Abstract
The present invention relates to a method of preparing a porous silicon nanorod structure composed of columnar bundles having a diameter of 50-100 nm and a length of 2-5 μm, and a lithium secondary cell using the porous silicon nanorod structure as an anode active material. The present invention provides a high-capacity and high-efficiency anode active material for lithium secondary cells, which can overcome the low conductivity of silicon and improve the electrode deterioration attributable to volume expansion because it is prepared by electrodepositing the surface of silicon powder with metal and simultaneously etching the silicon powder partially using hydrofluoric acid.