Lg Energy Solution, Ltd.

Sk Innovation Co., Ltd.

Jean Lee

Hyeon Sik Choi

Dong Hyun Kim

Youngkeun Lee

Cholho Lee

Su Jin Yoon

Houngsik Yoo

Yongkyoung Kim

Hyejin Kwon

Jongmoon Sung

A method for preparing a separator, a separator prepared using the same, and an electrochemical device including the same. More specifically, stability of the separator may be reinforced by preparing the separator using a slurry prepared by pre-dispersing an inorganic material and a dispersion resin, and then mixing a binder thereto when preparing the separator.

Method for manufacturing separator, separator manufactured thereby, and electrochemical device comprising same

Provided is a microporous polyolefin composite film with a thermally stable porous layer at high temperature, particularly, to the microporous polyolefin composite film in which the thermally stable porous layer at high temperature, which contains organic or inorganic particles and heat-resistant polymer having aromatic ring in main chain and also having a melting temperature or a glass transition temperature of 170 to 500&#xb0; C., is formed on one surface or both surfaces of a polyolefin microporous film by a phase separation, wherein the composite film with the porous layer has a permeability of 1.5&#xd7;10to 20.0&#xd7;10Darcy, a meltdown temperature of 160 to 300&#xb0; C., a MD/TD shrinkage of 1 to 40% at a temperature of 150&#xb0; C. for 60 minutes.

Microporous polyolefin composite film with a thermally stable porous layer at high temperature

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Daejeon, South Korea

Jean Lee