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:
May. 01, 2012
Filed:
Mar. 03, 2009
Yoon-jung Bae, Daejeon, KR;
Pil-kyu Park, Daejeon, KR;
Jong-hwan Kim, Daejeon, KR;
Dong-hun Han, Daejeon, KR;
Han-ho Lee, Daejeon, KR;
Sang-young Lee, Daejeon, KR;
Ji-sang Yu, Daejeon, KR;
Hyun-min Jang, Daejeon, KR;
Yoon-Jung Bae, Daejeon, KR;
Pil-Kyu Park, Daejeon, KR;
Jong-Hwan Kim, Daejeon, KR;
Dong-Hun Han, Daejeon, KR;
Han-Ho Lee, Daejeon, KR;
Sang-Young Lee, Daejeon, KR;
Ji-Sang Yu, Daejeon, KR;
Hyun-Min Jang, Daejeon, KR;
LG Chem, Ltd., , KR;
Abstract
A separator includes a porous substrate having a plurality of pores; and a porous coating layer formed on at least one surface of the porous substrate and made of a mixture of a plurality of inorganic particles and a binder polymer, wherein the binder polymer includes a first polyvinylidene fluoride based copolymer having solubility of 25 weight % or more with respect to acetone at 35° C.; a second polyvinylidene fluoride-based copolymer having solubility of 10 weight % or less with respect to acetone at 35° C.; and a polymer having a cyano group. This separator decelerates deterioration of life span of an electrochemical device, and prevents disintercalation of inorganic particles in the porous coating layer, thereby improving safety of the electrochemical device.