Abstract: Provided is a composition for forming a hard coating layer, which includes an epoxy siloxane resin, a crosslinking agent including a compound having an alicyclic epoxy group, a thermal initiator including a compound represented by Chemical Formula 2, and a photoinitiator to decrease curls and increase hardness of the hard coating film.
Type:
Grant
Filed:
August 5, 2019
Date of Patent:
November 9, 2021
Assignees:
SK Innovation Co., Ltd., SK ie technology Co., Ltd.
Inventors:
Jong Nam Ahn, Byoung Sun Ko, Tae Sug Jang, Jin Su Park, Ho Chul Yoon
Abstract: Provided is a hard coating film including a polyamideimide substrate layer and a hard coating layer, each of which has a predetermined refractive index, with a difference in the refractive index between those layers being 0.05. The substrate layer has a tensile modulus of 3 to 7 GPa, at a thickness of 80 ?m, as measured according to ASTM D111. The present invention relates to a hard coating film having improved mechanical and optical properties.
Type:
Grant
Filed:
December 2, 2019
Date of Patent:
October 5, 2021
Assignees:
SK Innovation Co., Ltd., SK ie technology Co., Ltd.
Inventors:
Jong Nam Ahn, Keon Hyeok Ko, Byoung Sun Ko, Sang Yoon Park, Jin Su Park, Ho Chul Yoon, Tae Sug Jang
Abstract: A separator for a secondary cell includes a porous polymer substrate having a first surface, a second surface opposing the first surface, and a plurality of pores connecting the first surface to the second surface; and heat-resistant coating layers formed on at least one of the first surface and the second surface of the porous polymer substrate and on internal surfaces of the pores using an atomic layer deposition process (ALD). Pores having a non-coated region are present in the internal surfaces of the pores.
Type:
Grant
Filed:
August 26, 2019
Date of Patent:
October 5, 2021
Assignees:
SK Innovation Co., Ltd., SK IE TECHNOLOGY CO., LTD.
Inventors:
Hye Jin Kim, Won Sub Kwack, Min Sang Park
Abstract: Provided is an ultra large-width coating device applied to a consecutive process. More particularly, the present invention relates to a coating device capable of maximizing productivity by consecutively manufacturing a large-width film without reducing physical properties of the manufactured film by overcoming a problem in that a coating width is limited during a coating process using the existing contact type coating roller, and a method for manufacturing an ultra large-width membrane using the same.
Type:
Grant
Filed:
June 20, 2017
Date of Patent:
June 1, 2021
Assignees:
SK INNOVATION CO., LTD., SK IE TECHNOLOGY CO., LTD.
Inventors:
Dong Jin Joo, Kyu Young Cho, Yun Bong Kim, Su Ji Lee, Won Sub Kwack, Hye Jin Kim
Abstract: The present invention relates to a composite separation membrane for a lithium secondary battery, having an excellent effect of improving the life time and safety of a battery and a lithium secondary battery including the membrane. The composite separation membrane includes a porous base layer; a heat-resistant layer formed on one side or both sides of the porous base layer; and a fusion layer formed on an outermost layer. The heat-resistant layer includes inorganic particles connected and fixed by binder polymers, and the fusion layer includes crystalline polymers in the form of particles having a melting temperature of 100° C. or higher.
Type:
Grant
Filed:
April 1, 2016
Date of Patent:
April 20, 2021
Assignees:
SK Innovation Co., Ltd., SK IE Technology Co., Ltd.
Inventors:
Dong Jin Joo, Su Ji Lee, Kyu Young Cho, Yun Bong Kim, Jae Woong Kim
Abstract: Provided are a separator for a lithium secondary battery and a lithium secondary battery comprising the same. The separator for a lithium secondary battery includes: a porous substrate; and a coating layer disposed on one side or both sides of the porous substrate and including a first inorganic particle and a second inorganic particle having different lengths of a major axis, and a binder, wherein a moisture content is less than 800 ppm after being left for 12 hours at a temperature of 40° C. and relative humidity of 90%.
Type:
Grant
Filed:
August 19, 2019
Date of Patent:
December 1, 2020
Assignees:
SK INNOVATION CO., LTD., SK IE TECHNOLOGY CO., LTD.
Inventors:
Yun Bong Kim, Won Sub Kwack, Hye Jin Kim, Su Ji Lee, Kyu Young Cho
Abstract: Provided is a separator for a secondary battery including: a porous substrate; and a coating layer formed on the porous substrate, wherein the coating layer includes a plurality of inorganic particles and a binder for binding the plurality of inorganic particles, and the binder includes a copolymer of a monomer mixture including an acrylamide-based monomer, a vinyl cyanide monomer, and an acrylic monomer having a carboxyl group.
Type:
Grant
Filed:
October 16, 2018
Date of Patent:
December 1, 2020
Assignees:
SK INNOVATION CO., LTD., SK IE TECHNOLOGY CO., LTD.
Inventors:
Yun Bong Kim, Su Ji Lee, Kyu Young Cho, Won Sub Kwack, Hye Jin Kim
Abstract: Provided are a polyamic acid resin derived from an aromatic diamine, an aromatic dianhydride, a cycloaliphatic dianhydride and an aromatic diacid dichloride, and a polyamideimide film including polyamideimide derived from an aromatic diamine, an aromatic dianhydride, a cycloaliphatic dianhydride and an aromatic diacid dichloride.
Type:
Grant
Filed:
September 11, 2018
Date of Patent:
October 27, 2020
Assignees:
SK Innovation Co., Ltd., SK Global Chemical Co., Ltd., SK IE Technology Co., Ltd.
Inventors:
Hyeon Jeong Kim, Sang Yoon Park, Tae Sug Jang, Jin Hyung Park
Abstract: Provided are a composite separator for a secondary battery including: a porous substrate; and a coating layer, formed on the porous substrate, by thermally curing aqueous slurry including inorganic particles, first binder particles, a second binder, and a thermal curing agent, wherein the first binder particles contain a copolymer of a monomer mixture including an acrylamide-based monomer, a vinyl cyanide-based monomer, an acrylic monomer having a carboxyl group, and an acrylic monomer having a hydroxyl group, and a lithium secondary battery including the same.
Type:
Grant
Filed:
November 28, 2018
Date of Patent:
August 25, 2020
Assignees:
SK INNOVATION CO., LTD., SK IE TECHNOLOGY CO., LTD.
Inventors:
Yun Bong Kim, Won Sub Kwack, Hye Jin Kim, Su Ji Lee, Kyu Young Cho
Abstract: Provided is a porous separator for a secondary battery including an inorganic oxide layer formed on a porous substrate by an atomic layer deposition process, such that a thin separator having excellent heat stability, permeability and electrolyte impregnability may be provided by controlling specific conditions in the process and thicknesses of the inorganic oxide layers on a surface and inside of the porous separator.
Type:
Grant
Filed:
April 12, 2017
Date of Patent:
June 23, 2020
Assignees:
SK Innovation Co., Ltd., SK IE Technology Co., Ltd.
Inventors:
Hye Jin Kim, Won Sub Kwack, Min Sang Park
Abstract: A separator for a secondary battery includes a porous polymer sheet having a first surface, a second surface opposing the first surface, and a plurality of pores connecting the first surface to the second surface; and heat-resistant inorganic layers formed on at least one of the first surface or the second surface of the porous polymer sheet and on internal surfaces of the pores using an atomic layer deposition (ALD) process. The at least one of the first surface or the second surface and the internal surfaces of the pores have hydrophobically coated hydrophobic layers having hydrophobic functional groups on the heat-resistant inorganic layers.
Type:
Grant
Filed:
October 21, 2016
Date of Patent:
April 7, 2020
Assignees:
SK Innovation Co., Ltd., SK IE TECHNOLOGY CO., LTD.
Inventors:
Hye Jin Kim, Won Sub Kwack, Min Sang Park
Abstract: 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.
Type:
Grant
Filed:
December 8, 2017
Date of Patent:
March 31, 2020
Assignees:
SK Innovation Co., Ltd., SK IE Technology Co., Ltd.
Inventors:
Yong Kyoung Kim, Dong Jin Joo, Young Jun Woo, Jae Woong Kim, Kyu Young Cho, Jung Moon Sung, Dong Man Cho
Abstract: Provided are a separator for a lithium secondary battery in which an entire thickness of the separator and a ratio of a heat-resistant layer included in the separator satisfy specific ranges, respectively, and a battery including the same. The separator has significantly excellent heat resistance and mechanical strength, and it is possible to manufacture a high capacity and high output battery using the separator, thereby making it possible to significantly improve safety even in the high capacity and the high output battery.
Type:
Grant
Filed:
April 11, 2017
Date of Patent:
October 22, 2019
Assignees:
SK Innovation Co., Ltd., SK IE Technology Co., Ltd.
Inventors:
Dong Jin Joo, Yun Bong Kim, Su Ji Lee, Kyu Young Cho
Abstract: A separator for a secondary cell includes a porous polymer substrate having a first surface, a second surface opposing the first surface, and a plurality of pores connecting the first surface to the second surface; and heat-resistant coating layers formed on at least one of the first surface and the second surface of the porous polymer substrate and on internal surfaces of the pores using an atomic layer deposition process (ALD). Pores having a non-coated region are present in the internal surfaces of the pores.
Type:
Grant
Filed:
December 1, 2016
Date of Patent:
October 1, 2019
Assignees:
SK INNOVATION CO., LTD., SK IE TECHNOLOGY CO., LTD.
Inventors:
Hye Jin Kim, Won Sub Kwack, Min Sang Park