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. 04, 2010
Filed:
Feb. 05, 2008
Seok-koo Kim, Daejeon, KR;
Joon-yong Sohn, Busan, KR;
Jong-hyeok Park, Daejeon, KR;
Hyun-min Jang, Daejeon, KR;
Byoung-jin Shin, Busan, KR;
Sang-young Lee, Daejeon, KR;
Jang-hyuk Hong, Daejeon, KR;
Seok-Koo Kim, Daejeon, KR;
Joon-Yong Sohn, Busan, KR;
Jong-Hyeok Park, Daejeon, KR;
Hyun-Min Jang, Daejeon, KR;
Byoung-Jin Shin, Busan, KR;
Sang-Young Lee, Daejeon, KR;
Jang-Hyuk Hong, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
An organic/inorganic composite separator includes (a) a polyolefin porous substrate having pores; and (b) a porous active layer containing a mixture of inorganic particles and a binder polymer, with which at least one surface of the polyolefin porous substrate is coated, wherein the porous active layer has a peeling force of 5 gf/cm or above, and a thermal shrinkage of the separator after being left alone at 150° C. for 1 hour is 50% or below in a machine direction (MD) or in a transverse direction (TD). This organic/inorganic composite separator solves the problem that inorganic particles in the porous active layer formed on the porous substrate are extracted during an assembly process of an electrochemical device, and also it may prevent an electric short circuit between cathode and anode even when the electrochemical device is overheated.