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:
Jul. 12, 2011
Filed:
Oct. 27, 2006
Ou Jung Kwon, Daejeon, KR;
Yong Ju Lee, Nonsan-si, KR;
Won Seok Chang, Daejeon, KR;
Ki Tae Kim, Daejeon, KR;
Seo Jae Lee, Daejeon, KR;
Ki Young Lee, Daejeon, KR;
Ou Jung Kwon, Daejeon, KR;
Yong Ju Lee, Nonsan-si, KR;
Won Seok Chang, Daejeon, KR;
Ki Tae Kim, Daejeon, KR;
Seo Jae Lee, Daejeon, KR;
Ki Young Lee, Daejeon, KR;
LG Chem, Ltd., , KR;
Abstract
Disclosed is an electrode active material comprising: a core layer capable of repeating lithium intercalation/deintercalation; an amorphous carbon layer; and a crystalline carbon layer, successively, wherein the core layer comprises at least two core particles. A secondary battery comprising the same electrode active material is also disclosed. The electrode active material can inhibit variations in volume of the core layer that may occur during repeated charge/discharge cycles, since the core layer comprising at least two core particles, each core particle having an increased area that is in contact with the carbon layer coated thereon. Therefore, the battery using the electrode active material can provide improved cycle life characteristics.