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. 14, 2011
Filed:
Aug. 10, 2007
Seungrim Yang, Daejeon, KR;
Young-min Kim, Daejeon, KR;
Juhyun Kim, Daejeon, KR;
Ki Woo Chun, Daejeon, KR;
Minjung Ryu, Seoul, KR;
Eun-suok OH, Daejeon, KR;
Min Ho Cho, Seoul, KR;
SeungRim Yang, Daejeon, KR;
Young-Min Kim, Daejeon, KR;
Juhyun Kim, Daejeon, KR;
Ki Woo Chun, Daejeon, KR;
Minjung Ryu, Seoul, KR;
Eun-Suok Oh, Daejeon, KR;
Min Ho Cho, Seoul, KR;
LG Chem, Ltd., , KR;
Abstract
Provided is a binder for an electrode mix containing a semi-interpenetrating polymer network (semi-IPN) of polyvinyl alcohol and polyurethane, wherein the polyurethane is mixed to crosslink with the polyvinyl alcohol to form semi-IPN, and a lithium secondary battery comprising the same. The binder has superior adhesion to the electrode, excellent electrolyte resistance and improved elongation percentage, and therefore it is possible to prevent exfoliation or separation of electrode active materials from current collectors which occurs during repeated charge/discharge cycles. As a result, the capacity or power out of secondary batteries can be maintained at a constant level.