Sk Innovation Co., Ltd.

Sk Ie Technology Co., Ltd.

Yong Kyoung Kim

Youngkeun Lee

Dong Jin Joo

Jae Woong Kim

Young Jun Woo

Jung Moon Sung

Kyu Young Cho

Jang-weon Rhee

Je An Lee

Gwigwon Kang

Inhwa Jung

Dong Man Cho

Jang Weon Rhee

Jang-Weon Rhee

Provided are a micro-porous hybrid film and a method for preparing the same, and more particularly, a micro-porous hybrid film capable of improving reliability of a battery by simultaneously improving thermal stability at a high temperature and water properties, and a method for preparing the same. In addition, the present invention relates to a micro-porous hybrid film suitable for a separator of a high capacity/high output lithium secondary battery capable of increasing production stability, long term stability, and performance of the battery by improving adhesive force between a micro-porous film and a coating layer and permeability and minimizing a water content by the coating layer.

Micro-porous hybrid film having electro-chemical stability and method for preparing the same

The following disclosure relates to a microporous polyolefin composite film having excellent heat resistance and thermal stability, and a method for manufacturing the same. More particularly, the present invention relates to a microporous polyolefin composite film capable of improving stability and reliability of a battery by heat sealing an edge of a microporous film provided with a coating layer that includes a polymer binder and inorganic particles, and a method for manufacturing the same.

Microporous polyolefin composite film having excellent heat resistance and thermal stability and method for manufacturing the same

Provided is a micro-porous polyolefin composite film, the micro-porous polyolefin composite film including a porous coating layer containing a polymer binder and inorganic particles, the polymer binder simultaneously employing an aqueous polymer and a non-aqueous polymer. The contents of the aqueous polymer and the non-aqueous polymer are controlled, and thus optimize heat resistance, adhesive strength, and the moisture content to thereby improve high-temperature stability, and, further, improve the adhesive strength to thereby improve stability in production, and minimize the moisture content to thereby improve reliability of a battery.

Micro-porous polyolefin composite film having excellent heat resistance and stability and method for producing the same

Disclosed is a microporous composite film having a coating layer formed on at least one surface of a microporous polyolefin film, wherein the coating layer simultaneously includes a high thermostable polymer resin and inorganic particles. More specifically, the present invention relates to a microporous composite film in which an area shrinkage at 170&#xb0; C. for 1 hr is 10% or less; a tensile modulus in each of a machine direction and a transverse direction at 130&#xb0; C. is 0.5 MPa to 7.0 MPa; a ratio between permeability of a microporous composite film (CCS) and permeability of a microporous polyolefin film (S) is 1.1&#x2266;CCS/S&#x2266;3.5; and a permeability of the microporous composite film is 450 sec or less.

Microporous composite film with high thermostable organic/inorganic coating layer

Growing community of inventors

Daejeon, South Korea

Yong Kyoung Kim