Titles:
Separator for power storage device and power storage device
蓄電デバイス用セパレータ及び蓄電デバイス
Abstracts:
PROBLEM TO BE SOLVED: To provide a separator for a power storage device having high strength, high safety, high dimensional stability at high temperature, and capable of thinning. A separator for a power storage device including a microporous layer, wherein the microporous layer contains a polyolefin having a melt flow rate (MFR) of 0.7 g / 10 min or less at a load of 2.16 kg and a temperature of 230 ° C. The short temperature in the fuse short test of the energy storage device separator is 200 ° C. or higher, and the heat shrinkage in the width direction (TD) and the mechanical direction (MD) when the energy storage device separator is heat-treated at 105 ° C. for 1 hour. ), The heat shrinkage rate is TD ≦ 1% and MD ≦ 4%, respectively. [Selection diagram] None
Titles:
Microporous membrane, separator for non-aqueous electrolyte secondary battery, microporous membrane winding body and its manufacturing method
微多孔膜、非水電解液二次電池用セパレータ、微多孔膜捲回体及びその製造方法
Abstracts:
PROBLEM TO BE SOLVED: To improve slackening of a microporous membrane of a microporous membrane wound body having a width of 300 mm or more and a length of 500 m or more. In particular, it improves the slackening of the microporous membrane of the polyolefin microporous membrane wound body after long-term storage. Further, the present invention provides a polyolefin microporous membrane wound body having no wrinkles or winding misalignment. SOLUTION: In a polyolefin microporous membrane, the amount of MD elongation when a load of 5 MPa is continuously applied in the longitudinal direction (MD) for 5 minutes is set to 0.1% or more and less than 0.8%. In a microporous membrane wound body in which the polyolefin microporous membrane having a width of 300 mm or more and a length of 500 m or more is wound around a cylindrical core, MD elongation at the widthwise end of the wound polyolefin microporous membrane The amount shall be 0.05% or more and less than 0.4%. [Selection diagram] None
Titles:
Separator and Electrochemical Device using it
분리막 및 이를 이용한 전기 화학 소자
Abstracts:
The present invention relates to a separator and an electrochemical device using the same, and more particularly, to a lithium secondary battery. More specifically, the present invention can form a thinner coating layer compared to the conventional polyolefin-based separator, and can secure equivalent or higher heat resistance despite forming a thinner coating layer, and energy density and safety of lithium secondary batteries can be improved at the same time.
본 발명은 분리막 및 이를 이용한 전기 화학 소자, 보다 구체적으로 리튬 이차전지에 관한 것이다. 더욱 구체적으로 본 발명은 종래 폴리올레핀 계열 분리막에 비해 더욱 박막의 코팅층을 형성할 수 있으며, 보다 더 얇은 두께의 코팅층을 형성함에도 불구하고 동등 이상의 내열성을 확보할 수 있으며, 리튬이차전지의 에너지밀도와 안전성을 동시에 향상시킬 수 있다.
Applicant:
SK ON CO LTD [KR] (에스케이온 주식회사)
Inventors:
KIM JAEWOONG (김재웅)
KIM JEONGHAN (김정한)
JO YUNKYUNG (조윤경)
KIM WHEESUNG (김휘성)
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