Patents by Inventor Jang-Hyuk Hong

Jang-Hyuk Hong 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).

  • Patent number: 10756319
    Abstract: Disclosed is a method for manufacturing a separator for an electrochemical device. The method contributes to formation of a separator with good bondability to electrodes and prevents inorganic particles from detaching during an assembling process of an electrochemical device.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: August 25, 2020
    Assignees: LG Chem, Ltd., TORAY INDUSTRIES, INC.
    Inventors: Joo-Sung Lee, Jang-Hyuk Hong, Jong-Hun Kim
  • Publication number: 20200127289
    Abstract: Disclosed is a negative electrode active material including artificial graphite having a large particle diameter and natural graphite having a small particle diameter, wherein the average particle diameter ratio of the small particle and the large particle is 1:1.5-1:5. A secondary battery including the negative electrode active material is also disclosed.
    Type: Application
    Filed: February 6, 2017
    Publication date: April 23, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Hyun-Wook Kim, Jong-Hun Kim, Jang-Hyuk Hong
  • Publication number: 20190115620
    Abstract: Disclosed is an electrode whose surface includes an organic/inorganic composite porous coating layer comprising heat-absorbing inorganic particles and a binder polymer, wherein the heat-absorbing inorganic particle is at least one particle selected from the group consisting of antimony-containing compounds, metal hydroxides, guanidine-based compounds, born-containing compounds and zinc tartrate compounds. A separator using the heat-absorbing inorganic particles as a component for forming or coating the separator, and an electrochemical device including the electrode and/or the separator are also disclosed. The separator using the heat-absorbing inorganic particles as a component for forming or coating the separator can ensure excellent thermal safety and minimizes degradation of the quality of a battery.
    Type: Application
    Filed: November 27, 2018
    Publication date: April 18, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Seok-Koo Kim, Hyun-Min Jang, Sang-Young Lee, Jang-Hyuk Hong
  • Patent number: 10050311
    Abstract: The present invention provides an electrode for a secondary battery, more specifically an electrode for a secondary battery, comprising a current collector; an electrode active material layer formed on at least one surface or the whole outer surface of the current collector; a conductive material-coating layer formed on the top surface of the electrode active material layer and comprising a conductive material and a first polymer binder; and a porous coating layer formed on the top surface of the conductive material-coating layer and comprising a second polymer binder. Also, the present invention provides a secondary battery and a cable-type secondary battery comprising the electrode.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: August 14, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Yo-Han Kwon, Jang-Hyuk Hong, Hye-Ran Jung, Je-Young Kim, Jong-Hun Kim
  • Patent number: 9985260
    Abstract: Disclosed is a method for manufacturing a separator. The method includes (S1) preparing a porous planar substrate having a plurality of pores, (S2) preparing a slurry containing inorganic particles dispersed therein and a polymer solution including a first binder polymer and a second binder polymer in a solvent, and coating the slurry on at least one surface of the porous substrate, (S3) spraying a non-solvent incapable of dissolving the second binder polymer on the slurry, and (S4) simultaneously removing the solvent and the non-solvent by drying. According to the method, a separator with good bindability to electrodes can be manufactured in an easy manner. In addition, problems associated with the separation of inorganic particles in the course of manufacturing an electrochemical device can be avoided.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: May 29, 2018
    Assignees: LG Chem, Ltd., TORAY INDUSTRIES, INC.
    Inventors: Joo-Sung Lee, Jang-Hyuk Hong, Jong-Hun Kim, Bo-Kyung Ryu
  • Publication number: 20180145376
    Abstract: An electrode assembly is provided. The electrode assembly has a plurality of electrode plates having one or both sides of each of the electrode plates that are coated with an electrode active material and are stacked with a separator interposed between the respective electrode plates. The separator includes a surplus outer periphery of a size greater than the outer periphery of an electrode plate, an electrode tab which extends from the outer periphery of the electrode plate and protrudes outwardly beyond the outer periphery of the separator is formed on each electrode plate, and at least some of the separators forming the electrode assembly have an insulation-enhancing part for suppressing heat shrinkage of a separator formed in the surplus outer peripheries thereof which are adjacent to the respective electrode tabs.
    Type: Application
    Filed: November 22, 2017
    Publication date: May 24, 2018
    Inventors: Hye Dam Jo, Jong Hun Kim, Hyun Wook Kim, Sang Won Bae, Ji Hee Bae, Jang Hyuk Hong
  • Patent number: 9954210
    Abstract: A method for manufacturing a separator includes (S1) preparing a porous substrate having pores, (S2) coating at least one surface of the porous substrate with a first solvent, (S3) coating the first solvent with a slurry containing inorganic particles dispersed therein and formed by dissolving a binder polymer in a second solvent, (S4) drying the first and second solvents simultaneously to form a porous organic-inorganic composite layer on the porous substrate. Since the phenomenon that the pores of the porous substrate are closing by the binder polymer is minimized, it is possible to prevent the resistance of the separator from increasing due to the formation of the porous organic-inorganic composite layer.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: April 24, 2018
    Assignees: LG Chem, Ltd., TORAY INDUSTRIES, INC.
    Inventors: Joo Sung Lee, Jang-Hyuk Hong, Jong-Hun Kim
  • Patent number: 9793535
    Abstract: Disclosed is a method for manufacturing an electrode structure including (S1) coating and drying a slurry for an electrode active material layer on an electrode current collector placed on a heated bottom surface, (S2) coating and drying a slurry for an insulating layer including inorganic particles, a binder, and a solvent, on a heated roller located at a predetermined distance from the bottom surface, and (S3) transferring the dried slurry for an insulating layer to the dried slurry for an electrode active material layer on the bottom surface, and thermo-compressing the dried slurry for an insulating layer and the dried slurry for an electrode active material layer, to form an insulating layer on an electrode surface.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: October 17, 2017
    Assignee: LG CHEM, LTD.
    Inventors: In-Gyoung Yu, Seok-Koo Kim, Jang-Hyuk Hong, Sun-Mi Jin, 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: 20170133719
    Abstract: A cable-type secondary battery having a horizontal cross section and extending longitudinally, includes a core for supplying lithium ions, the core including an electrolyte, an inner electrode comprising an open-structured inner current collector surrounding an outer surface of the core and an inner electrode active material layer surrounding the outer surface of the inner current collector, a separation layer surrounding an outer surface of the inner electrode to prevent a short circuit between electrodes, and an outer electrode surrounding an outer surface of the separation layer having an outer current collector, an outer electrode active material layer, a conductive material-coating layer comprising a conductive material and a first polymer binder, and a porous coating layer comprising a second polymer binder.
    Type: Application
    Filed: January 19, 2017
    Publication date: May 11, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Yo-Han Kwon, Jang-Hyuk Hong, Hye-Ran Jung, Je-Young Kim, Jong-Hun Kim
  • Patent number: 9590241
    Abstract: The present invention provides an electrode for a secondary battery, more specifically an electrode for a secondary battery, comprising a current collector; an electrode active material layer formed on at least one surface or the whole outer surface of the current collector; a conductive material-coating layer formed on the top surface of the electrode active material layer and comprising a conductive material and a first polymer binder; and a porous coating layer formed on the top surface of the conductive material-coating layer and comprising a second polymer binder. Also, the present invention provides a secondary battery and a cable-type secondary battery comprising the electrode.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: March 7, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Yo-Han Kwon, Jang-Hyuk Hong, Hye-Ran Jung, Je-Young Kim, Jong-Hun Kim
  • Patent number: 9368777
    Abstract: Disclosed is an electrochemical device. The electrochemical device includes: (a) a composite separator including a porous substrate, a first porous coating layer coated on one surface of the porous substrate, and a second porous coating layer coated on the other surface of the porous substrate; (b) an anode disposed to face the first porous coating layer; and (c) a cathode disposed to face the second porous coating layer. The first and second porous coating layers are each independently composed of a mixture including inorganic particles and a binder polymer. The first porous coating layer is thicker than the second porous coating layer. The electrochemical device has good thermal stability and improved cycle characteristics.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: June 14, 2016
    Assignees: LG Chem, Ltd., Toray Battery Seperator Film Co., Ltd.
    Inventors: Joo-Sung Lee, Jang-Hyuk Hong, Jong-Hun Kim, Bo-Kyung Ryu
  • Publication number: 20160056438
    Abstract: A separator includes a porous substrate having a plurality of pores; and a porous coating layer formed on at least one surface of the porous substrate and made of a mixture of a binder and a plurality of inorganic particles, wherein the binder includes a crosslinked binder. This separator may improve high temperature cycle performance, discharge characteristics and thermal resistance of an electrochemical device since the separator exhibits improved insolubility and impregnation to electrolyte and improved thermal resistance.
    Type: Application
    Filed: August 31, 2015
    Publication date: February 25, 2016
    Applicant: LG CHEM, LTD.
    Inventors: Jong-Hun KIM, Sang-Young LEE, Pil-Kyu PARK, Jang-Hyuk HONG, Byoung-Jin SHIN, In-Chul KIM
  • Publication number: 20150380702
    Abstract: A method for manufacturing a separator includes (S1) preparing a porous substrate having pores, (S2) coating at least one surface of the porous substrate with a first solvent, (S3) coating the first solvent with a slurry containing inorganic particles dispersed therein and formed by dissolving a binder polymer in a second solvent, (S4) drying the first and second solvents simultaneously to form a porous organic-inorganic composite layer on the porous substrate. Since the phenomenon that the pores of the porous substrate are closing by the binder polymer is minimized, it is possible to prevent the resistance of the separator from increasing due to the formation of the porous organic-inorganic composite layer.
    Type: Application
    Filed: September 10, 2015
    Publication date: December 31, 2015
    Applicant: LG CHEM, LTD.
    Inventors: Joo Sung LEE, Jang-Hyuk HONG, Jong-Hun KIM
  • Patent number: 9214672
    Abstract: The present invention provides an electrode for a secondary battery, more specifically an electrode for a secondary battery, comprising a current collector; an electrode active material layer formed on at least one surface or the whole outer surface of the current collector; a graphite-based coating layer formed on the top surface of the electrode active material layer and comprising graphite, a conductive material and a first polymer binder; and a porous coating layer formed on the top surface of the graphite-based coating layer and comprising a second polymer binder. Also, the present invention provides a secondary battery and a cable-type secondary battery comprising the electrode.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: December 15, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Yo-Han Kwon, Jang-Hyuk Hong, Hye-Ran Jung, Je-Young Kim, Jong-Hun Kim
  • Publication number: 20150243964
    Abstract: Disclosed is a method for manufacturing an electrode structure including (S1) coating and drying a slurry for an electrode active material layer on an electrode current collector placed on a heated bottom surface, (S2) coating and drying a slurry for an insulating layer including inorganic particles, a binder, and a solvent, on a heated roller located at a predetermined distance from the bottom surface, and (S3) transferring the dried slurry for an insulating layer to the dried slurry for an electrode active material layer on the bottom surface, and thermo-compressing the dried slurry for an insulating layer and the dried slurry for an electrode active material layer, to form an insulating layer on an electrode surface.
    Type: Application
    Filed: May 8, 2014
    Publication date: August 27, 2015
    Applicant: LG CHEM, LTD.
    Inventors: In-Gyoung Yu, Seok-Koo Kim, Jang-Hyuk Hong, Sun-Mi Jin, Jong-Hun Kim
  • Patent number: 9083036
    Abstract: The present invention refers to a separator, comprising a porous substrate having multiple pores; a porous coating layer formed on at least one area selected from at least one surface of the porous substrate and the pores of the porous substrate, and comprising multiple inorganic particles and a binder polymer, the binder polymer being existed on a part or all of the surface of the inorganic particles to connect and immobilize the inorganic particles therebetween; and microcapsules dispersed in at least one area selected from the pores of the porous substrate and pores formed by vacant spaces between the inorganic particles present in the porous coating layer, and containing therein an additive for improving the performances of an electrochemical device, and an electrochemical device having the same.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: July 14, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Hyung-Kyun Yu, Jong-Hun Kim, Jang-Hyuk Hong, In-Chul Kim, Joo-Sung Lee
  • Patent number: 9070930
    Abstract: The present invention relates to a method for manufacturing an electrode having an organic/inorganic composite porous coating layer comprising porous inorganic particles and a binder polymer, wherein the porous inorganic particles have pores having such a size that lithium ions (Li+) solvated in an electrolyte solvent can pass therethrough. The method comprises the steps of dispersing inorganic precursors and heat-decomposable compounds in a dispersion medium, misting the inorganic precursor solution, and performing a thermal decomposition and a crystallization processes, to thereby prepare porous inorganic particles, adding and mixing the porous inorganic particles to a polymer solution in which a binder polymer is dissolved, and coating the mixture onto a preliminarily formed electrode and drying the coating layer.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: June 30, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Dae-Jong Seo, Sang-Young Lee, Seok-Koo Kim, Jang-Hyuk Hong
  • Publication number: 20150171490
    Abstract: Disclosed is an electrode whose surface includes an organic/inorganic composite porous coating layer comprising heat-absorbing inorganic particles and a binder polymer, wherein the heat-absorbing inorganic particle is at least one particle selected from the group consisting of antimony-containing compounds, metal hydroxides, guanidine-based compounds, born-containing compounds and zinc tartrate compounds. A separator using the heat-absorbing inorganic particles as a component for forming or coating the separator, and an electrochemical device including the electrode and/or the separator are also disclosed. The separator using the heat-absorbing inorganic particles as a component for forming or coating the separator can ensure excellent thermal safety and minimizes degradation of the quality of a battery.
    Type: Application
    Filed: February 23, 2015
    Publication date: June 18, 2015
    Applicant: LG CHEM, LTD.
    Inventors: Seok-Koo Kim, Hyun-Min Jang, Sang-Young Lee, Jang-Hyuk Hong
  • Patent number: 9017878
    Abstract: Disclosed is an electrode whose surface includes an organic/inorganic composite porous coating layer comprising heat-absorbing inorganic particles and a binder polymer, wherein the heat-absorbing inorganic particle is at least one particle selected from the group consisting of antimony-containing compounds, metal hydroxides, guanidine-based compounds, boron-containing compounds and zinc tartrate compounds. A separator using the heat-absorbing inorganic particles as a component for forming or coating the separator, and an electrochemical device including the electrode and/or the separator are also disclosed. The separator using the heat-absorbing inorganic particles as a component for forming or coating the separator can ensure excellent thermal safety and minimizes degradation of the quality of a battery.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: April 28, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Seok-Koo Kim, Hyun-Min Jang, Sang-Young Lee, Jang-Hyuk Hong