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. 14, 2009
Filed:
Sep. 21, 2006
Ji Heon Ryu, Seoul, KR;
Eun Ju Lee, Daejeon, KR;
Jung Eun Hyun, Seoul, KR;
Jaepil Lee, Daejeon, KR;
Jeong Hee Choi, Busan, KR;
Min Su Kim, Daejeon, KR;
Youngjoon Shin, Daejeon, KR;
Ji Heon Ryu, Seoul, KR;
Eun Ju Lee, Daejeon, KR;
Jung Eun Hyun, Seoul, KR;
Jaepil Lee, Daejeon, KR;
Jeong Hee Choi, Busan, KR;
Min Su Kim, Daejeon, KR;
Youngjoon Shin, Daejeon, KR;
LG Chem, Ltd., , KR;
Abstract
Disclosed herein is a lithium secondary battery having improved life characteristics by removal of metal ion impurities incorporated during an assembly process of the battery via a cation exchange process, thereby preventing electrodeposition of the metal ions on an anode, through the addition of a cation exchange material, containing cations selected from the group consisting of lithium, sodium, ammonium and any combination thereof, to an electrode and/or a surface of a separator.