Patents by Inventor Won-Jong Kwon

Won-Jong Kwon 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: 10981790
    Abstract: The present invention relates to a method for preparing a functionalized graphene. The method for preparing a functionalized graphene according to the present invention can functionalize graphene by a simple method and does not use any other substance other than graphene and a salt containing a double bond, thereby enabling functionalization of graphene while exhibiting characteristics inherent to graphene.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: April 20, 2021
    Inventors: Mi Jin Lee, Won Jong Kwon, Gwang Hoon Jun, Ji Yeon Byeon, Yu Ra Lee
  • Publication number: 20200391171
    Abstract: The present invention relates to a method for preparing graphene using a novel block copolymer. The present invention has features that, by using the block copolymer to mediate graphene that is hydrophobic and a solvent of a feed solution that is hydrophilic, the exfoliation efficiency of graphene as well as the dispersion stability thereof can be increased during high-pressure homogenization.
    Type: Application
    Filed: August 28, 2020
    Publication date: December 17, 2020
    Applicants: LG Chem, Ltd., Seoul National University R&DB Foundation
    Inventors: Mi Jin Lee, Byeong-Hyeok Sohn, Seung Yong Chae, Won Jong Kwon, Kwon Nam Sohn
  • Patent number: 10862124
    Abstract: The present invention relates to a conducting material composition which is allowed to provide an electrode having a higher content of uniformly dispersed carbon nanotubes, thereby providing a lithium rechargeable batteryelectrode having more improved electrical characteristics and life characteristics, a slurry composition for forming a lithium rechargeable batteryelectrode using the same, and a lithium rechargeable battery. The conducting material composition includes carbon nanotube; and a dispersing agent including a plurality of polyaromatic hydrocarbon oxides, in which the dispersing agent contains the polyaromatic hydrocarbon oxides having a molecular weight of 300 to 1000 in an amount of 60% by weight or more.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: December 8, 2020
    Inventors: Kwon Nam Sohn, Kil Sun Lee, Won Jong Kwon, Byung Hun Oh, Su Jin Park, In Young Kim
  • Patent number: 10835886
    Abstract: The present invention relates to a method for preparing graphene using a novel block copolymer. The present invention has features that, by using the block copolymer to mediate graphene that is hydrophobic and a solvent of a feed solution that is hydrophilic, the exfoliation efficiency of graphene as well as the dispersion stability thereof can be increased during high-pressure homogenization.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: November 17, 2020
    Inventors: Mi Jin Lee, Byeong-Hyeok Sohn, Seung Yong Chae, Won Jong Kwon, Kwon Nam Sohn
  • Patent number: 10821687
    Abstract: The present invention relates to a method of producing hollow carbon capsules which can simply and effectively produce hollow carbon capsule by using polymer particles as soft templates and using a spray-drying method.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: November 3, 2020
    Assignee: LG CHEM, LTD.
    Inventors: In Young Kim, Jin Yeong Lee, Kwon Nam Sohn, Eui Yong Hwang, Won Jong Kwon
  • Patent number: 10818915
    Abstract: Provided are a porous silicon-carbon composite, which includes a core including a plurality of active particles, a conductive material formed on at least a portion of surfaces of the active particles, first pores, and second pores, and a first shell layer which is coated on the core and includes graphene, wherein the active particles include a plurality of silicon particles, silicon oxide particles, or a combination thereof, the first pores are present in the core and are formed by agglomeration of the plurality of active particles, and the second pores are irregularly dispersed and present in the core, has an average particle diameter smaller than an average particle diameter of the active particles, and are spherical, a method of manufacturing the same, and a negative electrode and a lithium secondary battery including the porous silicon-carbon composite.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: October 27, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Eui Yong Hwang, In Young Kim, Jin Yeong Lee, Won Jong Kwon, Kwon Nam Sohn, Seung Bo Yang
  • Patent number: 10807056
    Abstract: The present invention relates to a high pressure homogenizer and a method for manufacturing graphene using the same, and according to one aspect of the present invention, there is provided a high pressure homogenizer comprising a channel module which comprises a microchannel through which an object for homogenization passes, wherein the channel module comprises at least one baffle disposed so as to partition the microchannel into a plurality of spaces and the baffle is provided so as to partition the microchannel into two spaces along the width direction or the height direction.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: October 20, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Eun Jeong Kim, Kwang Hyun Yoo, Ye Hoon Im, Jin Yeong Lee, Won Jong Kwon
  • Publication number: 20200317607
    Abstract: A composition for detecting an acidic compound and a method using the same are discloses herein. In some embodiments, the method includes contacting a composition comprising a metal-organic hybrid structure formed by coordinate bond between a compound represented by the following Chemical Formula 1 or a salt thereof and a metal ion, with an acidic compound to be detected, wherein the composition is in the form of a metallogel prior to contact with the acidic compound, and detecting the acidic compound based on the transition of the composition from the form of a metallogel to a liquid phase. In some embodiments, detection of the acidic compound can be visually confirmed by phase transformation of the composition from a metallogel to a liquid phase.
    Type: Application
    Filed: January 17, 2019
    Publication date: October 8, 2020
    Applicants: LG Chem, Ltd., Seoul National University R&DB Foundation
    Inventors: Won Jong Kwon, Dongwhan Lee, Junghwan Kim
  • Publication number: 20200290878
    Abstract: The present invention provides graphene in which a polymer having a functional group capable of improving the dispersibility of graphene is bonded to the surface of the graphene. The present invention also provides a method for preparing the graphene described above.
    Type: Application
    Filed: November 23, 2018
    Publication date: September 17, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Won Jong Kwon, Yong-O Im, Mi Jin Lee, Gwang Hoon Jun
  • Publication number: 20200122108
    Abstract: The present invention relates to a high pressure homogenizer and a method for manufacturing graphene using the same, and according to one aspect of the present invention, there is provided a high pressure homogenizer comprising a channel module which comprises a microchannel through which an object for homogenization passes, wherein the channel module comprises at least one baffle disposed so as to partition the microchannel into a plurality of spaces and the baffle is provided so as to partition the microchannel into two spaces along the width direction or the height direction.
    Type: Application
    Filed: May 8, 2017
    Publication date: April 23, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Eun Jeong Kim, Kwang Hyun Yoo, Ye Hoon Im, Jin Yeong Lee, Won Jong Kwon
  • Patent number: 10602646
    Abstract: The present invention relates to a method for preparing a magnetic iron oxide-graphene composite, a magnetic iron oxide-graphene composite prepared thereby and a composition for electromagnetic wave shielding including the same, and since graphene is prepared from a stage 1-GIC using FeCl3, magnetic particles in the form of FeOx are naturally formed on the surface of graphene during the preparation process. In addition, a magnetic material is formed on the surface of graphene while the defects of graphene are minimized, and thus the magnetic iron oxide-graphene composite prepared according to the present invention can be useful as an electromagnetic wave absorber.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: March 24, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Se Ho Park, Kwon Nam Sohn, Won Jong Kwon, Seung Bo Yang
  • Patent number: 10569243
    Abstract: The present invention relates to a novel dispersing agent capable of uniformly dispersing a variety of carbon-based materials in different media including aqueous solvents and a preparation method thereof, and a carbon-based material-dispersed composition including the same. The dispersing agent is a mixture of a plurality of polyaromatic hydrocarbon oxides, and the mixture includes polyaromatic hydrocarbon oxide having a molecular weight of 300 to 1000 in an amount of 60% by weight or more.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: February 25, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Kwon Nam Sohn, Won Jong Kwon, Kil Sun Lee, In Young Kim, Yeu Young Youn, Hee Yong Park
  • Patent number: 10562845
    Abstract: A compound represented by Chemical Formula 1 according to the present invention can coordinate with metal ions to form a bidirectional or multidirectional metal-organic hybrid structure. Thus, the present invention can synthesize various ligands using amine-aldehyde condensation, and synthesize metal-organic materials using the same.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: February 18, 2020
    Assignees: LG CHEM, LTD., Seoul National University R&DB Foundation
    Inventors: Dongwhan Lee, Jung Hwan Kim, Won Jong Kwon, Yong Jin Bae
  • Patent number: 10556886
    Abstract: A compound represented by Chemical Formula 1 according to the present invention can coordinate with metal ions to form a bidirectional or multidirectional metal-organic hybrid structure. Thus, the present invention can synthesize various ligands using amine-aldehyde condensation, and synthesize metal-organic materials using the same.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: February 11, 2020
    Assignees: LG CHEM, LTD., Seoul National University R&DB Foundation
    Inventors: Dongwhan Lee, Jung Hwan Kim, Won Jong Kwon, Yong Jin Bae
  • Patent number: 10472242
    Abstract: The present invention relates to a method for preparing graphene which comprises subjecting expanded graphite to high speed homogenization to prepare a feed solution and then subjecting the same to high pressure homogenization, thereby increasing the degree of dispersion of expanded graphite in the feed solution and so improving the efficiency of high pressure homogenization. Therefore, the present method has features that the efficiency of graphene preparation is excellent and the size of graphene to be prepared is uniform, compared with a conventional process.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: November 12, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Seung Bo Yang, Kwon Nam Sohn, Won Jong Kwon, Se Ho Park, Mi Jin Lee
  • Patent number: 10435571
    Abstract: The present invention relates to a method for preparing carbon nanotubes which are capable of more effectively preparing carbon nanotubes having a uniform and fine size, and a dispersion composition of carbon nanotubes obtained using the same. The method for preparing carbon nanotube comprises the steps of: forming a dispersion comprising carbon nanotube bundles, a dispersant and a solvent; and enabling the dispersion to consecutively pass through a high pressure homogenizer, wherein the dispersant is a mixture of plural kinds of polyaromatic hydrocarbon oxides, and the carbon nanotube bundles are pulverized or disentangled while passing through a microchannel of the high pressure homogenizer under a shear force to form carbon nanotubes.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: October 8, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Kwon Nam Sohn, Kil Sun Lee, Won Jong Kwon, Su Jin Park, Byung Hun Oh, Eui Yong Hwang, Seung Bo Yang, Kwang Hyun Yoo, Mi Jin Lee
  • Publication number: 20190284053
    Abstract: Provided a high-pressure homogenizer comprising a channel module comprising a microchannel through which an object for homogenization passes, wherein the microchannel is provided with a first flow channel and a second flow channel sequentially arranged along the direction through which the object passes, the first flow channel is provided with a plurality of first baffles disposed so as to partition the microchannel into a plurality of spaces, the second flow channel is provided with a plurality of second baffles disposed so as to partition the microchannel into a plurality of spaces, and at least one of the first baffles is provided to be positioned between two adjacent second baffles.
    Type: Application
    Filed: October 13, 2017
    Publication date: September 19, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Eun Jeong Kim, Kwang Hyun Yoo, Ye Hoon Im, In Young Kim, Won Jong Kwon
  • Patent number: 10406515
    Abstract: The present invention relates to a metal complex compound which are prepared in the form of a metal nanostructure having various stereo structures and thus can be used as a catalyst or the like having an excellent activity in preparing a polyalkylene carbonate resin and the like, and a metal nanostructure and a catalyst composition comprising the same. The metal complex compound comprises a plurality of linear inorganic coordination polymer chains having a form in which an oxalic acid is coordinated and linked to a transition metal and the plurality of polymer chains are linked to each other via a predetermined neutral ligand.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: September 10, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Won Jong Kwon, Sung Ho Yoon, Ye Ji Lee
  • Publication number: 20190271100
    Abstract: The present invention relates to a carbon nanotube fiber and methods for preparing the same. In one embodiment, a method for preparing a carbon nanotube fiber comprises reacting a carbon source in the presence of a catalyst and a catalytic activator to form carbon nanotube aggregates, contacting the carbon nanotube aggregates with graphene oxide, and forming the carbon nanotube aggregates in contact with the graphene oxide into a carbon nanotube fiber.
    Type: Application
    Filed: January 24, 2018
    Publication date: September 5, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Eu Gene Oh, Ji Eun Kim, Mi Jin Lee, Jae Hong Lee, Ju Han Kim, Won Jong Kwon, Won Jae Lee, Jin Kyu Lee
  • Patent number: 10376868
    Abstract: The present invention relates to a linear inorganic coordination polymer and a metal complex compound which are prepared in the form of a metal nanostructure having various stereo structures and thus can be used as a catalyst or the like having an excellent activity in preparing a polyalkylene carbonate resin and the like, and a metal nanostructure and a catalyst composition comprising the same. The linear inorganic coordination polymer comprises a repeating unit having a form in which a predetermined oxalic acid derivative is coordinately bonded to a transition metal, and the metal complex compound comprises a plurality of linear inorganic coordination polymer chains and has a structure in which the plurality of polymer chains are linked to each other via a predetermined neutral ligand.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: August 13, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Won Jong Kwon, Sung Ho Yoon, Ye Ji Lee, Min Og Kim