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:
Oct. 09, 2007
Filed:
May. 19, 2000
Kyung Suk Yun, Seoul, KR;
Byung Won Cho, Seoul, KR;
Seong Mu JO, Seoul, KR;
Wha Seop Lee, Seoul, KR;
Won IL Cho, Seoul, KR;
Kun You Park, Seoul, KR;
Hyung Sun Kim, Seoul, KR;
Un Seok Kim, Seoul, KR;
Seok Ku Ko, Seoul, KR;
Suk Won Chun, Seoul, KR;
Sung Won Choi, Kyonggi-Do, KR;
Kyung Suk Yun, Seoul, KR;
Byung Won Cho, Seoul, KR;
Seong Mu Jo, Seoul, KR;
Wha Seop Lee, Seoul, KR;
Won Il Cho, Seoul, KR;
Kun You Park, Seoul, KR;
Hyung Sun Kim, Seoul, KR;
Un Seok Kim, Seoul, KR;
Seok Ku Ko, Seoul, KR;
Suk Won Chun, Seoul, KR;
Sung Won Choi, Kyonggi-Do, KR;
Korea Institute of Science and Technology, Seoul, KR;
Abstract
The present invention provides a lithium secondary battery and its fabrication method. More particularly, the present invention provides a lithium secondary battery comprising a super fine fibrous porous polymer separator film and its fabrication method, wherein the porous polymer separator film is fabricated by the following process: a) melting at least one polymer or dissolving at least one polymer with organic solvents to obtain at least one polymeric melt or at least one polymeric solution; b) adding the obtained polymeric melt or polymeric solution to barrels of an electrospinning machine; and c) discharging the polymeric melt or polymeric solution onto a substrate using a nozzle to form a porous separator film. The lithium secondary battery of the present invention has the advantages of better adhesion with electrodes, good mechanical strength, better performance at low and high temperatures, better compatibility with organic electrolyte solution of a lithium secondary battery.