Patents by Inventor Da-Kyung Han

Da-Kyung Han 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: 20200358064
    Abstract: A slurry composition for coating a secondary battery separator, a separator prepared using the same, and a secondary battery including the separator, wherein the slurry composition includes a phenolic compound including two or more aromatic rings, inorganic particles, a binder, and a solvent.
    Type: Application
    Filed: December 5, 2018
    Publication date: November 12, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Gye Min KWON, Houng Sik YOO, Hyeon CHOI, Da Kyung HAN, Je An LEE
  • Publication number: 20200350540
    Abstract: A flame retardant separator for secondary batteries, and more particularly, a flame retardant separator for secondary batteries comprising or coated with a metal hydroxide having a low Gibbs free energy among polymorphs of a metal hydroxide used as an inorganic flame retardant.
    Type: Application
    Filed: May 8, 2019
    Publication date: November 5, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Da Kyung HAN, Kwan Woo NAM, Seung Hyun LEE, Je An LEE
  • Publication number: 20200223827
    Abstract: The present technology provides 3,3-difluoroallylamines or pharmaceutically acceptable salts thereof, preparation processes thereof, pharmaceutical compositions comprising the same, and uses thereof. The 3,3-difluoroallylamines or their pharmaceutically acceptable salts exhibit potent inhibitory activity on VAP-1 and therefore can be usefully applied, e.g., for the treatment and prophylaxis of nonalcoholic hepatosteatosis (NASH).
    Type: Application
    Filed: December 12, 2019
    Publication date: July 16, 2020
    Inventors: Tae Dong HAN, Hee Jae TAK, Eun Kyung KIM, Eui Chul LEE, Sol PARK, Hyok Jun CHO, Cheol Hee LIM, So Young KIM, Hyun Ho CHOI, Da Na JEONG, Na Yeon YANG, Na Ry HA
  • Publication number: 20200212400
    Abstract: A separator for secondary batteries that allows the amount of a dispersing resin that is used and the amount of a dispersant that is used to be reduced in order to prevent an increase in resistance after the separator is coated, which occurs in the case in which a large amount of the dispersing resin is used in order to disperse inorganic matter, and an electrochemical device having the same applied thereto. The amount of a dispersing resin is reduced, whereby it is possible to prevent an increase in resistance after a porous separator is coated, a dispersing resin having a specific weight average molecular weight is mixed, whereby physical properties and dispersivity are improved, and the use of an expensive dispersant is excluded, whereby processing costs are reduced.
    Type: Application
    Filed: December 24, 2018
    Publication date: July 2, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Da Kyung HAN, Seung Hyun LEE, Dong Wook SUNG, Je An LEE
  • Publication number: 20200168877
    Abstract: A separator for an electrochemical device, including: a porous polymer substrate; and a porous coating layer formed on at least one surface of the porous polymer substrate and containing a plurality of microcapsules and a binder polymer positioned on the whole or a part of the surface of the microcapsules to connect and fix the microcapsules with one another, wherein the microcapsules include metal hydroxide particles, and capsule coating layer surrounding each surface of the metal hydroxide particles. An electrochemical device including the separator, and the microcapsules are also provided. The microcapsules and separator show excellent flame resistance and can reduce degradation of battery performance caused by water adsorbability of the plurality of a metal hydroxide particle.
    Type: Application
    Filed: May 14, 2019
    Publication date: May 28, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Seung-Hyun LEE, Da-Kyung HAN, Kwan-Woo NAM, Je-An LEE
  • Patent number: 10541399
    Abstract: The present invention relates to a secondary battery separator, and a manufacturing method therefor. The secondary battery separator according to the present invention comprises an organic/inorganic composite porous layer for improving thermal resistance and physical strength, and since the organic/inorganic composite porous layer uses polymer particles as a binder, the secondary battery separator, compared with a separator using a solvent-type binder resin using organic solvents, exhibits excellent permeability.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: January 21, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, Ji-Eun Kim, In-Gyoung Yu, Sun-Mi Jin, Da-Kyung Han
  • Patent number: 10177359
    Abstract: The present disclosure relates to a separator for an electrochemical device with pores having predetermined diameter, permeation time, and tortuosity, to allow for smooth movement of lithium ions and a method for manufacturing the same, and smooth movement of lithium ions may be optimized by the separator for an electrochemical device.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: January 8, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, Su-Jin Yoon, Dong-Wook Sung, Da-Kyung Han, Kyung-Ryun Ka, Jong-Hun Kim
  • Patent number: 10115950
    Abstract: The present disclosure provides a method of preparing a separator for a lithium secondary battery, comprising: (S1) bringing polymer particles into electric charging to obtain electrically charged polymer particles; (S2) transferring the electrically charged polymer particles on at least one surface of a porous polymer substrate to form an electrode-adhesion layer whose area ranges from 1 to 30% based on the total area of the porous polymer substrate; and (S3) fixing the electrode-adhesion layer with heat and pressure. In accordance with the present disclosure, an electrode-adhesion layer is applied by using electrostatic charging, more specifically coating polymer particles by way of laser printing, without the addition of a slurry in a solvent, thereby allowing easy handling and storage and needs no drying step of the solvent to provide cost savings effect as well as rapid and efficient preparation of the separator.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: October 30, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, Sun-Mi Jin, Da-Kyung Han, Ji-Eun Kim, Kyung-Ryun Ka
  • Publication number: 20180254447
    Abstract: The present disclosure relates to an invention directed to a composite separator having a porous coating layer, where the porous coating layer is prepared from a slurry by adjusting a particle diameter of an inorganic matter that is an ingredient of the slurry, so that a sinking rate of the inorganic particles may remarkably slow down and dispersibility may be dramatically improved, and as a result, the content of the inorganic particles may relatively increase and the inorganic particles may be uniformly distributed in the coating layer on a substrate, thereby preventing a reduction in battery performance.
    Type: Application
    Filed: May 2, 2018
    Publication date: September 6, 2018
    Applicants: LG Chem, Ltd., TORAY INDUSTRIES, INC.
    Inventors: Joo-Sung Lee, Su-Jin Yoon, Da-Kyung Han, Bo-Kyung Ryu, Jong-Hun Kim
  • Patent number: 10002719
    Abstract: The present disclosure provides a separator comprising a porous substrate, a porous coating layer and a binder layer, the binder comprising at least one homopolymer of polyvinylidene fluoride and at least one copolymer of polyvinylidene fluoride (PVDF)-co-hexafluoropropylene (HFP) so that a content difference of hexafluoropropylene (HFP) present in the two compounds is about 3 wt % or higher.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: June 19, 2018
    Assignees: LG Chem, Ltd., TORAY INDUSTRIES, INC.
    Inventors: Jeong-Min Ha, Su-Jin Yoon, Jong-Hun Kim, Byoung-Jin Shin, Joo-Sung Lee, Jin-Woo Kim, Da-Kyung Han
  • Patent number: 9991491
    Abstract: The present disclosure relates to an invention directed to controlling a viscosity of a slurry used to manufacture an electrochemical device, by adjusting a particle diameter of an inorganic matter that is an ingredient of the slurry, so that a sinking rate of the inorganic particles may remarkably slow down and dispersibility may be dramatically improved, and as a result, the content of the inorganic particles may relatively increase and the inorganic particles may be uniformly distributed in a coating layer on a substrate, thereby preventing a reduction in battery performance.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: June 5, 2018
    Assignees: LG Chem, Ltd., TORAY INDUSTRIES, INC.
    Inventors: Joo-Sung Lee, Su-Jin Yoon, Da-Kyung Han, Bo-Kyung Ryu, Jong-Hun Kim
  • Publication number: 20170331094
    Abstract: The present invention relates to a secondary battery separator, and a manufacturing method therefor. The secondary battery separator according to the present invention comprises an organic/inorganic composite porous layer for improving thermal resistance and physical strength, and since the organic/inorganic composite porous layer uses polymer particles as a binder, the secondary battery separator, compared with a separator using a solvent-type binder resin using organic solvents, exhibits excellent permeability.
    Type: Application
    Filed: October 26, 2015
    Publication date: November 16, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, Ji-Eun Kim, In-Gyoung Yu, Sun-Mi Jin, Da-Kyung Han
  • Patent number: 9768439
    Abstract: The present disclosure provides an apparatus for preparing an electrode assembly, comprising a printing unit including a charging mean for bringing polymer particles into electric charging to obtain electrically charged polymer particles, and a transferring mean for coating the electrically charged polymer particles by way of transferring on at least one surface of a substrate for an electrochemical device to form an adhesive layer on the substrate, the substrate being at least one of a cathode, an anode and a separator; and a laminating unit that applies heat and pressure to the substrate having the adhesive layer formed thereon so as to obtain the electrode assembly comprising the cathode, the anode and the separator interposed therebetween.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: September 19, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, Da-Kyung Han, Kyung-Ryun Ka, Jong-Hun Kim
  • Patent number: 9666851
    Abstract: The present invention refers to a separator and an electrochemical device having the same. The separator of the present invention comprises a non-woven fabric substrate obtained from fibers and having multiple pores formed between the fibers; and a polymer coating layer formed on a part or the whole of the surface of the fibers, wherein the polymer coating layer comprises a polymer having a tensile strength of 80 MPa or more, a tensile modulus of 3,000 MPa or more and a flexural modulus of 3,000 MPa or more. The separator of the present invention can reduce costs for manufacturing electrochemical devices, and it can control the size of pores present in the non-woven fabric substrate to prevent the generation of a leak current and provide improved mechanical strength.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: May 30, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Jeong-Min Ha, Jong-Hun Kim, Su-Jin Yoon, Byeong-Gyu Cho, Jang-Hyuk Hong, Da-Kyung Han
  • Publication number: 20150303003
    Abstract: The present disclosure provides a separator comprising a porous substrate, a porous coating layer and a binder layer, the binder comprising at least one homopolylmer of polyvinylidene fluoride and at least one copolymer of polyvinylidene fluoride (PVDF)-co-hexafluoropropylene (HFP) so that a content difference of hexafluoropropylene (HFP) present in the two compounds is about 3 wt % or higher.
    Type: Application
    Filed: April 20, 2015
    Publication date: October 22, 2015
    Applicant: LG CHEM, LTD.
    Inventors: Jeong-Min Ha, Su-Jin Yoon, Jong-Hun Kim, Byoung-Jin Shin, Joo-Sung Lee, Jin-Woo Kim, Da-Kyung Han
  • Publication number: 20150280192
    Abstract: The present disclosure relates to a separator for an electrochemical device with pores having predetermined diameter, permeation time, and tortuosity, to allow for smooth movement of lithium ions and a method for manufacturing the same, and smooth movement of lithium ions may be optimized by the separator for an electrochemical device.
    Type: Application
    Filed: March 20, 2014
    Publication date: October 1, 2015
    Applicant: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, Su-Jin Yoon, Dong-Wook Sung, Da-Kyung Han, Kyung-Ryun Ka, Jong-Hun Kim
  • Publication number: 20150263324
    Abstract: The present disclosure provides a method of preparing a separator for a lithium secondary battery, comprising: (S1) bringing polymer particles into electric charging to obtain electrically charged polymer particles; (S2) transferring the electrically charged polymer particles on at least one surface of a porous polymer substrate to form an electrode-adhesion layer whose area ranges from 1 to 30% based on the total area of the porous polymer substrate; and (S3) fixing the electrode-adhesion layer with heat and pressure. In accordance with the present disclosure, an electrode-adhesion layer is applied by using electrostatic charging, more specifically coating polymer particles by way of laser printing, without the addition of a slurry in a solvent, thereby allowing easy handling and storage and needs no drying step of the solvent to provide cost savings effect as well as rapid and efficient preparation of the separator.
    Type: Application
    Filed: September 30, 2014
    Publication date: September 17, 2015
    Applicant: LG CHEM, LTD.
    Inventors: Joo-Sung Lee, Sun-Mi Jin, Da-Kyung Han, Ji-Eun Kim, Kyung-Ryun Ka
  • Publication number: 20150034249
    Abstract: The present disclosure provides an apparatus for preparing an electrode assembly, comprising a printing unit including a charging mean for bringing polymer particles into electric charging to obtain electrically charged polymer particles, and a transferring mean for coating the electrically charged polymer particles by way of transferring on at least one surface of a substrate for an electrochemical device to form an adhesive layer on the substrate, the substrate being at least one of a cathode, an anode and a separator; and a laminating unit that applies heat and pressure to the substrate having the adhesive layer formed thereon so as to obtain the electrode assembly comprising the cathode, the anode and the separator interposed therebetween.
    Type: Application
    Filed: September 11, 2014
    Publication date: February 5, 2015
    Applicant: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, Da-Kyung Han, Kyung-Ryun Ka, Jong-Hun Kim
  • Publication number: 20140287296
    Abstract: The present invention refers to a separator and an electrochemical device having the same. The separator of the present invention comprises a non-woven fabric substrate obtained from fibers and having multiple pores formed between the fibers; and a polymer coating layer formed on a part or the whole of the surface of the fibers, wherein the polymer coating layer comprises a polymer having a tensile strength of 80 MPa or more, a tensile modulus of 3,000 MPa or more and a flexural modulus of 3,000 MPa or more. The separator of the present invention can reduce costs for manufacturing electrochemical devices, and it can control the size of pores present in the non-woven fabric substrate to prevent the generation of a leak current and provide improved mechanical strength.
    Type: Application
    Filed: June 5, 2014
    Publication date: September 25, 2014
    Inventors: Jeong-Min Ha, Jong-Hun Kim, Su-Jin Yoon, Byeong-Gyu Cho, Jang-Hyuk Hong, Da-Kyung Han
  • Publication number: 20140227593
    Abstract: The present disclosure relates to an invention directed to controlling a viscosity of a slurry used to manufacture an electrochemical device, by adjusting a particle diameter of an inorganic matter that is an ingredient of the slurry, so that a sinking rate of the inorganic particles may remarkably slow down and dispersibility may be dramatically improved, and as a result, the content of the inorganic particles may relatively increase and the inorganic particles may be uniformly distributed in a coating layer on a substrate, thereby preventing a reduction in battery performance.
    Type: Application
    Filed: April 22, 2014
    Publication date: August 14, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Joo-Sung Lee, Su-Jin Yoon, Da-Kyung Han, Bo-Kyung Ryu, Jong-Hun Kim