Samsung Sdi Co., Inc.

Jun Ho Chung

Sang Ho Lee

Jae Hyun Cho

Kee Wook Kim

Jung Seong Lee

Jin Su Park

Jung Sue Jang

In Sik Jeon

Tae Joon Park

Tae Sik Kim

Woo Jin Jang

Jin Kyu Park

Dae Hyun Hong

Yun Gi Kim

Ki Chul Hong

Mok Yun Jin

Geon Ja Lim

Bong Hyun Cho

Hun Young Park

Disclosed herein is a high thermal resistant polyolefin-based separator including a coating layer containing polyamic acid. Specifically, the separator includes a polyolefin-based substrate film, and a coating layer containing polyamic acid formed on one or both surfaces of the polyolefin-based substrate film, wherein the polyamic acid contains one or more functional groups selected from the group consisting of a sulfone group, a trifluoromethyl group, an alkyl group, and a phenyl ether group. Also, disclosed herein is an electrochemical battery having improved thermal stability by using the separator including a coating layer containing polyamic acid.

Separation membrane comprising coating layer, method of preparing same, and battery using same

The present invention relates to a method for manufacturing a separator for batteries, a separator manufactured by the method, and a secondary battery including the separator. More specifically, the present invention relates to a method for manufacturing a separator having enhanced tensile strength by performing a shutdown process stopping a stretch during a process of stretching a base film of the separator.

Separator having having high tensile strength, manufacturing method therefor, and secondary battery including same

The present invention relates to a method for manufacturing a separator in which the tensile strength is enhanced and melt shrinkage is reduced by controlling elongation step from among the manufacturing steps thereof. Additionally, the present invention relates to a separator having superb winding processability as well as superb thermal stability due to the raised the tensile strength while maintaining a low rate of melt shrinkage. Furthermore, the present invention relates to an electrochemical battery having enhanced stability by utilizing a separator having high tensile strength and a low rate of melt shrinkage.

Method for manufacturing separation film and the separation film, and battery using same

A polyolefin-based porous separator, including a first polyolefin-based porous film on a first surface of a second polyolefin-based porous film, and a third polyolefin-based porous film on a second surface of the second polyolefin-based porous film, each of the first and third polyolefin-based porous films containing inorganic particles having an average particle size of 10 nm to 100 nm, a thickness ratio of the first polyolefin-based porous film, the second polyolefin-based porous film, and the third polyolefin-based porous film being 0.5 to 1.5:1 to 6:0.5 to 1.5, and thermal shrinkage rates of the separator in a machine direction and a transverse direction measured after standing at 120&#xb0; C. for 1 hour each being 5% or less, and air permeability of the separator being 250 sec/100 cc or less.

Separator, method of manufacturing the same and battery using the same

Disclosed herein is a coating composition having excellent thermal resistance and drying processability, utilizing polyamic acid having high thermal resistance and excellent solubility in a low boiling point solvent. Specifically, the coating composition includes polyamic acid and a low boiling point solvent having a boiling point less than 150&#xb0; C. Also, disclosed herein a separator having improved thermal resistance by coating the coating composition on one or both surfaces of a polyolefin-based substrate film, and an electrochemical battery having improved thermal stability by using the separator.

Separation membrane coating agent composition, separation membrane made from coating agent composition, and battery using same

A drying apparatus that dries a porous membrane that is carryable along a predetermined direction and a drying method, the drying apparatus including a housing; a plurality of air suppliers arranged in the housing along the predetermined direction so as to inject air toward the porous membrane; and a plurality of air exhausters arranged in the housing along the predetermined direction so as to exhaust air that has been injected from the air suppliers to an exterior of the housing, wherein the plurality of air suppliers are symmetrically arranged with one another at opposite sides of the porous membrane to face each other with the porous membrane disposable therebetween.

Apparatus and method for drying

Growing community of inventors

Suwon-si, South Korea

Jun Ho Chung