Patents by Inventor Yongkyoung Kim

Yongkyoung Kim has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210005858
    Abstract: This application relates to a separator which includes a substrate and a coating layer disposed on at least one surface of the substrate. The coating layer includes first organic particles, second organic particles, and inorganic particles. An average particle diameter of the first organic particles is larger than an average particle diameter of the second organic particles and an average particle diameter of the inorganic particles. The first organic particles protrude from a surface of the coating layer to a height of about 0.1 ?m to about 0.5 ?m and are distributed on the surface of the coating layer at an area ratio of about 5% to about 15% of a surface area of the coating layer. A weight ratio of the organic particles to the inorganic particles in the coating layer is about 20:80 to about 40:60.
    Type: Application
    Filed: January 16, 2019
    Publication date: January 7, 2021
    Inventors: Yongkyoung Kim, Gain Kim, Jungyoon Lee
  • Publication number: 20200403205
    Abstract: Disclosed are a separator for a lithium secondary battery and a lithium secondary battery comprising same. The separator for a lithium secondary battery comprises: a porous substrate; and a coating layer disposed on at least one side of the porous substrate, wherein the coating layer contains heat-resistant organic particles, an organic heat-resistant binder, and an organic adhesive binder, wherein the heat-resistant organic particles have a thermal decomposition temperature of 150° C. or higher and a particle diameter of 100 nm to 300 nm, the organic heat-resistant binder is a first organic material having a glass transition temperature of 130° C. to 200° C., the organic adhesive binder is a second organic material having a glass transition temperature of ?40° C. or lower, and the mixing weight ratio of the organic heat-resistant binder and the organic adhesive binder is 7:3 to 9:1.
    Type: Application
    Filed: January 29, 2019
    Publication date: December 24, 2020
    Inventors: Jungyoon Lee, Gain Kim, Yongkyoung Kim
  • Publication number: 20200388808
    Abstract: A separator for a rechargeable lithium battery and a rechargeable lithium battery including the separator, the separator including a porous substrate, and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes a heat resistant binder including a (meth)acryl copolymer including a first structural unit and a second structural unit, the first structural unit being a structural unit of a (meth)acrylamide and the second structural unit being a structural unit of a (meth)acrylic acid, a (meth)acrylate, a (meth)acrylonitrile, a (meth)acrylamido sulfonic acid, a (meth)acrylamido sulfonate salt, or a combination thereof; polyethylene particles; and first inorganic particles, and an average particle size (D50) of the first inorganic particles is larger than an average particle size (D50) of the polyethylene particles.
    Type: Application
    Filed: December 17, 2019
    Publication date: December 10, 2020
    Inventors: Hyeonsun CHOI, Yongkyoung KIM, Jungyoon LEE, Yangseob KIM
  • Publication number: 20200376655
    Abstract: Disclosed herein is an action robot including a figure including an authentication memory in which identification information is stored and a base configured to output an action using the figure when the figure is mounted. The base includes a figure driver configured to drive the figure such that the figure outputs a predetermined action, a communication transceiver configured to establish connection with a management server for performing authentication of the mounted figure, a figure authenticator configured to acquire the identification information stored in the authentication memory when the figure is mounted, and a processor configured to control the communication transceiver to transmit the acquired identification information to the management server.
    Type: Application
    Filed: February 24, 2020
    Publication date: December 3, 2020
    Applicant: LG ELECTRONICS INC.
    Inventors: Yongkyoung SHIN, Sanghun KIM
  • Patent number: 10826041
    Abstract: A separator includes a substrate and a coating layer on at least a surface of the substrate, the coating layer including first organic particles, second organic particles, and a first binder, the first organic particles have a smaller mean particle diameter (D50) than that of the second organic particles, and at least one selected from the first organic particles and the second organic particles has a core-shell structure.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: November 3, 2020
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jungyoon Lee, Gain Kim, Yongkyoung Kim
  • Publication number: 20200266415
    Abstract: A separator includes a substrate, a first layer on the substrate, the first layer including LiFePO4 (LFP) particles, and a second layer on the substrate, the second layer including organic particles having a melting point in a range of about 100° C. to about 130° C.
    Type: Application
    Filed: February 14, 2020
    Publication date: August 20, 2020
    Inventors: Jungyoon LEE, Yongkyoung KIM, Yangseob KIM
  • Publication number: 20200127264
    Abstract: Provided is a separator including a substrate, and a coating layer disposed on at least one surface of the substrate, wherein the coating layer comprises inorganic particles and a first binder, and a ratio of an average particle diameter (D50) of the inorganic particles to an average particle diameter (D50) of the first binder is about 1.5:1 to about 2.5:1. When using the separator, the adhesion to an electrode may be improved, thus leading to improved safety and lifetime characteristics of a battery.
    Type: Application
    Filed: June 27, 2018
    Publication date: April 23, 2020
    Inventors: Gain KIM, Yongkyoung KIM, Jinwoo KIM, Hyungbae KIM
  • Publication number: 20200075910
    Abstract: A separator for a rechargeable lithium battery and a rechargeable lithium battery including the separator, the separator including a porous substrate; and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes organic filler particles, fluorine organic binder particles, and (meth)acryl organic binder particles, an average particle diameter of the organic filler particles is equal to or greater than an average particle diameter of the fluorine organic binder particles, and the fluorine organic binder particles are coated on the porous substrate as a part of the coating layer in an amount of less than about 0.1 g/m2 per surface.
    Type: Application
    Filed: September 3, 2019
    Publication date: March 5, 2020
    Inventors: Gain KIM, Yongkyoung KIM, Yangseob KIM, Jungyoon LEE
  • Publication number: 20190280274
    Abstract: A separator includes a substrate and a coating layer on at least one surface of the substrate, wherein the coating layer includes first organic particles and second organic particles, and an average particle diameter of the first organic particles is larger than an average particle diameter of the second organic particles. The first organic particles protrude or extend to a height of about 0.1 ?m to about 0.5 ?m from a dented portion of a surface of the coating layer, and are distributed on the surface of the coating layer in an area ratio of about 5% or greater to less than 30% with respect to a total surface area of the coating layer. The separator may have improved adhesion to electrodes, insulation characteristics, and air permeability, and a battery including the separator may have improved lifespan characteristics.
    Type: Application
    Filed: March 5, 2019
    Publication date: September 12, 2019
    Inventors: Gain KIM, Yongkyoung KIM, Jungyoon LEE
  • Publication number: 20190237734
    Abstract: A separator includes a substrate and a coating layer on at least a surface of the substrate, the coating layer including first organic particles, second organic particles, and a first binder, the first organic particles have a smaller mean particle diameter (D50) than that of the second organic particles, and at least one selected from the first organic particles and the second organic particles has a core-shell structure.
    Type: Application
    Filed: January 29, 2019
    Publication date: August 1, 2019
    Inventors: Jungyoon LEE, Gain KIM, Yongkyoung KIM
  • Patent number: 10205149
    Abstract: Provided is a manufacturing method of a polyolefin-based multilayer composite porous film, including: a) forming a composition including a polyolefin resin and diluent to a sheet; b) stretching the sheet and extracting the diluent to manufacture a film; c) performing heat-treatment on the manufactured film; and d) coating one surface or both surfaces of the heat-treated film with a coating solution containing a heat resistant resin, wherein step c) and step d) are continuously performed.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: February 12, 2019
    Assignee: SK Innovation Co., Ltd.
    Inventors: Gwigwon Kang, Dongjin Joo, Yongkyoung Kim, Jaewoong Kim, Hyungmin Kim, Jungmoon Sung, Youngjun Woo, Jang-weon Rhee, Inhwa Jung
  • Publication number: 20170338461
    Abstract: A separator for a rechargeable battery includes a porous substrate and a heat resistance layer on at least one surface of the porous substrate. The heat resistance layer includes an acryl-based copolymer, an alkali metal, and a filler. The acryl-based copolymer includes a unit derived from (meth)acrylate or (meth)acrylic acid, a cyano group-containing unit, and a sulfonate group-containing unit.
    Type: Application
    Filed: May 16, 2017
    Publication date: November 23, 2017
    Inventors: Dongwan SEO, Changhong KO, YangSeob KIM, Yongkyoung KIM, Sam-Jin PARK, Jinkyu PARK
  • Publication number: 20160030974
    Abstract: Provided is a manufacturing method of a polyolefin-based multilayer composite porous film, including: a) forming a composition including a polyolefin resin and diluent to a sheet; b) stretching the sheet and extracting the diluent to manufacture a film; c) performing heat-treatment on the manufactured film; and d) coating one surface or both surfaces of the heat-treated film with a coating solution containing a heat resistant resin, wherein step c) and step d) are continuously performed.
    Type: Application
    Filed: July 29, 2015
    Publication date: February 4, 2016
    Inventors: Gwigwon Kang, Dongjin Joo, Yongkyoung Kim, Jaewoong Kim, Hyungmin Kim, Jungmoon Sung, Youngjun Woo, Jang-weon Rhee, Inhwa Jung
  • Publication number: 20140295061
    Abstract: 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° 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 1.5×10?5 to 20.0×10?5 Darcy, a meltdown temperature of 160 to 300° C., a MD/TD shrinkage of 1 to 40% at a temperature of 150° C. for 60 minutes.
    Type: Application
    Filed: June 18, 2014
    Publication date: October 2, 2014
    Inventors: Jean Lee, Jongmoon Sung, Cholho Lee, Yongkyoung Kim, Youngkeun Lee
  • Patent number: 8795826
    Abstract: 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° 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 1.5×10?5 to 20.0×10?5 Darcy, a meltdown temperature of 160 to 300° C., a MD/TD shrinkage of 1 to 40% at a temperature of 150° C. for 60 minutes.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: August 5, 2014
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jean Lee, Jongmoon Sung, Cholho Lee, Yongkyoung Kim, Youngkeun Lee
  • Patent number: 8486521
    Abstract: The present invention relates to a microporous polyethylene film for use as battery separator. The microporous polyethylene film according to the present invention is characterized by having a film thickness of 5-40 ?m, a porosity of 35-55%, a permeability from 2.5×10?5 to 10.0 10?5 Darcy, a puncture strength of at least 0.10 N/?m at 90° C., a puncture angle of at least 30° at 90° C., and a permeability from 2.0 10?5 to 8.0 10?5 Darcy after shrinking freely at 120° C. for 1 hour. The microporous polyethylene film in accordance with the present invention has very superior puncture strength and thermal stability at high temperature and takes place of less decrease of permeability due to low thermal shrinkage at high temperature, as well as superior permeability. Therefore, it can be usefully applied in a high-capacity, high-power battery to improve thermal stability and long-term stability of the battery.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: July 16, 2013
    Assignee: SK Innovation Co., Ltd.
    Inventors: Inhwa Jung, Jang-Weon Rhee, Gwigwon Kang, Youngkeun Lee, Yongkyoung Kim
  • Patent number: 8354185
    Abstract: The present invention relates to a microporous polyethylene film for use as battery separator. The microporous polyethylene film according to the present invention is characterized by having a film thickness of 5-40 ?m, a porosity of 35-55%, a permeability from 2.5×10?5 to 10.0 10?5 Darcy, a puncture strength of at least 0.10 N/?m at 90° C., a puncture angle of at least 30° at 90° C., and a permeability from 2.0 10?5 to 8.0 10?5 Darcy after shrinking freely at 120° C. for 1 hour. The microporous polyethylene film in accordance with the present invention has very superior puncture strength and thermal stability at high temperature and takes place of less decrease of permeability due to low thermal shrinkage at high temperature, as well as superior permeability. Therefore, it can be usefully applied in a high-capacity, high-power battery to improve thermal stability and long-term stability of the battery.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: January 15, 2013
    Assignee: SK Innovation Co., Ltd.
    Inventors: Inhwa Jung, Jang-Weon Rhee, Gwigwon Kang, Youngkeun Lee, Yongkyoung Kim
  • Publication number: 20120156570
    Abstract: The present invention relates to a microporous polyethylene film for use as battery separator. The microporous polyethylene film according to the present invention is characterized by having a film thickness of 5-40 ?m, a porosity of 35-55%, a permeability from 2.5×10?5 to 10.0 10?5 Darcy, a puncture strength of at least 0.10 N/?m at 90° C., a puncture angle of at least 30° at 90° C., and a permeability from 2.0 10?5 to 8.0 10?5 Darcy after shrinking freely at 120° C. for 1 hour. The microporous polyethylene film in accordance with the present invention has very superior puncture strength and thermal stability at high temperature and takes place of less decrease of permeability due to low thermal shrinkage at high temperature, as well as superior permeability. Therefore, it can be usefully applied in a high-capacity, high-power battery to improve thermal stability and long-term stability of the battery.
    Type: Application
    Filed: February 23, 2012
    Publication date: June 21, 2012
    Applicant: SK Innovation Co., Ltd.
    Inventors: Inhwa Jung, Jang-Weon Rhee, Gwigwon Kang, Youngkeun Lee, Yongkyoung Kim
  • Publication number: 20120077113
    Abstract: Provided is a microporous organic/ inorganic composite coated layer comprising a heat resistant resin and inorganic particles, formed on at least one side of microporous polyethylene. The microporous polyethylene composite film is characterized by sufficient permeability and heat resistance at the same time, of which the permeability (Gurley) of overall composite film including a coated layer is not more than 300 sec; shrinkage after 150° C. for 1 hour is 0-3% in both MD/TD directions; maximum shrinkage in TMA is not more than 3%, and TMA meldown temperature is 145-200° C. The microporous polyethylene composite film formed by means of the coated layer possesses stability at high temperature as well as excellent permeability, thereby ensuring reliability and efficiency of a battery at the same time. A separator which conforms to high power/high capacity can be provided thereby.
    Type: Application
    Filed: June 17, 2010
    Publication date: March 29, 2012
    Applicant: SK INNOVATION CO., LTD.
    Inventors: Yongkyoung Kim, Jongmoon Sung, Jean Lee, Dongjin Joo, Youngkeun Lee
  • Patent number: 8048936
    Abstract: The present invention relates to a microporous polyolefin film suitable as a separator for batteries and thermal properties thereof. A microporous polyolefin film according to the present invention has a film thickness of 5-40 ?m, a porosity of 30%-60%, a permeability of 2.0×10?5-8.0×10?5 Darcy, a maximum pore size determined by the bubble point method of not more than 0.1 ?m, a puncture strength of 0.20 N/?m or more at room temperature and 0.05 N/?m or more at 120° C., and a maximum shrinkage ratio in the transverse direction (TD) when subjected to a thickness-normalized external force in TMA (thermo-mechanical analysis) of not more than 0%. With excellent thermal stability at high temperature as well as superior puncture strength and gas permeability, the microporous polyolefin film according to the present invention is suitable for high-capacity, and high-power batteries.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: November 1, 2011
    Assignee: SK Innovation Co., Ltd.
    Inventors: Gwigwon Kang, Jang-Weon Rhee, Inhwa Jung, Youngkeun Lee, Yongkyoung Kim