Patents by Inventor Jong Sung Yu

Jong Sung Yu 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: 20200044239
    Abstract: Provided are a porous inorganic insulator-sulfur composite and a lithium-sulfur battery including the same. More particularly, provided are a composite having sulfur supported in pores of a porous inorganic insulator, a cathode for lithium-sulfur batteries or an interlayer, which includes the composite, and a lithium-sulfur battery including the cathode or the interlayer.
    Type: Application
    Filed: July 17, 2019
    Publication date: February 6, 2020
    Inventors: Jong Sung YU, Byong-June LEE
  • Publication number: 20190277794
    Abstract: An electrode composed of a substrate including a graphene layer coated on a first metal; and a complex including a second metal deposited on the substrate and a hydroxide of the first metal, where the complex is in the form of core-shell in which the second metal is a core and the hydroxide of the first metal is a shell, and the second metal has a higher standard reduction potential than the first metal. The graphene-coated metal foam of the present invention is the first case that proves not only theoretically but also by experiment that the remarkable catalytic ability reducing other metals (Au, Pt, Ag, and Cu, etc.) with a higher reduction potential than the metal by graphene coated on the metal surface it electroless deposition without additional reductant or electrical reduction conditions is due to the electrical double layer or interfacial dipole induced between the graphene and the metal.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 12, 2019
    Applicant: DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jong Sung YU, Chunfei ZHANG
  • Publication number: 20180318795
    Abstract: The present invention relates to a method of reducing a metal oxide comprising the steps of preparing a mixture by mixing a metal oxide and a metal hydride (step 1) and reducing the mixture by heat treatment (step 2) and a method of producing a photocatalyst using the same, and The method of reducing a metal oxide of the present invention can easily reduce such metal oxides as TiO2, ZrO2, V2O3, and Fe2O3.
    Type: Application
    Filed: September 30, 2016
    Publication date: November 8, 2018
    Inventor: Jong-Sung YU
  • Patent number: 9415351
    Abstract: The present invention relates to a reverse osmosis membrane including: a porous support; and a polyamide active layer formed on the porous support and including zeolite, surface-treated with a compound having at least one functional group selected from a group consisting of an amino group and a glycidyl group, and a method of manufacturing the same.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: August 16, 2016
    Assignees: LG CHEM, LTD., KOREA UNIVERSITY RESEARCH & BUSINESS FOUNDATION
    Inventors: Young-Ju Lee, Jong-Sung Yu, Jae-Hong Kim, Chong-Kyu Shin, Yun-Kyung Kim
  • Patent number: 9306217
    Abstract: Provided are mesoporous carbon structures and a method for preparing the same. The mesoporous carbon structures have a high surface area, a large pore volume and a large pore size in addition to a small mesopore length. Therefore, when using the mesoporous carbon structures as an anode active material for a lithium secondary battery, it is possible to provide a lithium secondary battery with excellent lithium ion storability and charge/discharge efficiency.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: April 5, 2016
    Assignee: Korea University Research and Business Foundation
    Inventor: Jong-Sung Yu
  • Publication number: 20150321151
    Abstract: The present invention relates to a reverse osmosis membrane including: a porous support; and a polyamide active layer formed on the porous support and including zeolite, surface-treated with a compound having at least one functional group selected from a group consisting of an amino group and a glycidyl group, and a method of manufacturing the same.
    Type: Application
    Filed: June 7, 2013
    Publication date: November 12, 2015
    Inventors: Young-Ju LEE, Jong-Sung YU, Jae-Hong KIM, Chong-Kyu SHIN, Yun-Kyung KIM
  • Patent number: 9126840
    Abstract: Provided are organosilica composites based on bis(3-triethoxysilylpropyl)tetrasulfide (TESPTS) or bis(3-triethoxysilylpropyl)disulfide (TESPDS) and containing octadecyltrimethoxy silane (C18TMS) and cetyltrimethylammonium bromide (CTAB), and a method for preparing hollow or porous carbon structures and silica structures using the same. According to the present disclosure, it is possible to obtain hollow or porous carbon structures and silica structures in a more simple and cost-efficient manner. Thus, the resultant structures have a high surface area and a large mesopore volume, so that they may serve as catalyst carriers for fuel cells capable of loading metal catalyst particles having a smaller particle size in a larger amount and in a more homogeneously dispersed state.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: September 8, 2015
    Assignee: Korea University Research and Business Foundation
    Inventor: Jong-Sung Yu
  • Patent number: 8993198
    Abstract: Disclosed is a method for preparing a platinum/support catalyst or a platinum alloy/support catalyst, including: a) preparing a dispersion solution including urea, a support and a water-soluble salt of at least one metal(s) having catalytic activity; (b) reacting the dispersion solution at high temperature so as to deposit the metal hydroxide particles derived from the at least one metal(s) on the support; and (c) reducing the metal hydroxide particles. The size and distribution of the platinum particles or platinum alloy particles are greatly improved by the use of urea.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: March 31, 2015
    Assignee: Korea University Research and Business Foundation
    Inventor: Jong-Sung Yu
  • Publication number: 20140356623
    Abstract: Provided are organosilica composites based on bis(3-triethoxysilylpropyl)tetrasulfide (TESPTS) or bis(3-triethoxysilylpropyl)disulfide (TESPDS) and containing octadecyltrimethoxy silane (C18TMS) and cetyltrimethylammonium bromide (CTAB), and a method for preparing hollow or porous carbon structures and silica structures using the same. According to the present disclosure, it is possible to obtain hollow or porous carbon structures and silica structures in a more simple and cost-efficient manner. Thus, the resultant structures have a high surface area and a large mesopore volume, so that they may serve as catalyst carriers for fuel cells capable of loading metal catalyst particles having a smaller particle size in a larger amount and in a more homogeneously dispersed state.
    Type: Application
    Filed: May 29, 2013
    Publication date: December 4, 2014
    Inventor: Jong-Sung Yu
  • Patent number: 8877078
    Abstract: Disclosed are a method for recycling silica waste and a method for preparing nanoporous material and other valuable silica materials. More specifically, a method for preparing a nanoporous material by recycling silica-containing waste produced from a silica etching process in the synthesis of nanoporous carbon is provided. The present disclosure allows recycling of silica waste in an effective and environment-friendly manner, reduction of consumption of chemical materials, and reduction of chemical waste. Accordingly, the present disclosure enables effective preparation of various valuable nanoporous silica and other silica materials from silica waste released for production of various nanoporous materials.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: November 4, 2014
    Assignee: Korea University Research And Business Foundation
    Inventor: Jong-Sung Yu
  • Patent number: 8865116
    Abstract: Disclosed is a method for preparing hematite iron oxide having various nanostructures, including: preparing a mixture solution by adding iron chloride and caffeine to a solvent and magnetically stirring; and performing hydrothermal synthesis, wherein the solvent is selected from water, ethanol, propanol and methanol. In accordance with the present disclosure, hematite iron oxide (?-Fe2O3) superstructures of various shapes, including grape, cube, dumbbell and microsphere shapes, can be synthesized in different solvents using caffeine. The shapes can be controlled variously via a simple one-step synthesis route without using a growth-inducing agent and without separation based on size. The prepared hematite iron oxide exhibits high coercivity at room temperature owing to its fine crystal structures and anisotropic shapes.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: October 21, 2014
    Assignee: Korea University Research and Business Foundation
    Inventors: Jong-Sung Yu, Nitin Kaduba Chaudhari, Hyoung Chan Kim, Chul Sung Kim, Jeunghee Park
  • Publication number: 20130251624
    Abstract: Disclosed is a method for preparing hematite iron oxide having various nanostructures, including: preparing a mixture solution by adding iron chloride and caffeine to a solvent and magnetically stirring; and performing hydrothermal synthesis, wherein the solvent is selected from water, ethanol, propanol and methanol. In accordance with the present disclosure, hematite iron oxide (?-Fe2O3) superstructures of various shapes, including grape, cube, dumbbell and microsphere shapes, can be synthesized in different solvents using caffeine. The shapes can be controlled variously via a simple one-step synthesis route without using a growth-inducing agent and without separation based on size. The prepared hematite iron oxide exhibits high coercivity at room temperature owing to its fine crystal structures and anisotropic shapes.
    Type: Application
    Filed: November 7, 2012
    Publication date: September 26, 2013
    Applicant: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventor: Jong-Sung Yu
  • Publication number: 20110315660
    Abstract: Disclosed are a method for recycling silica waste and a method for preparing nanoporous material and other valuable silica materials. More specifically, a method for preparing a nanoporous material by recycling silica-containing waste produced from a silica etching process in the synthesis of nanoporous carbon is provided. The present disclosure allows recycling of silica waste in an effective and environment-friendly manner, reduction of consumption of chemical materials, and reduction of chemical waste. Accordingly, the present disclosure enables effective preparation of various valuable nanoporous silica and other silica materials from silica waste released for production of various nanoporous materials.
    Type: Application
    Filed: April 29, 2011
    Publication date: December 29, 2011
    Inventor: Jong-Sung Yu
  • Publication number: 20110065025
    Abstract: Disclosed is a method for preparing a platinum/support catalyst or a platinum alloy/support catalyst, including: a) preparing a dispersion solution including urea, a support and a water-soluble salt of at least one metal(s) having catalytic activity; (b) reacting the dispersion solution at high temperature so as to deposit the metal hydroxide particles derived from the at least one metal(s) on the support; and (c) reducing the metal hydroxide particles. The size and distribution of the platinum particles or platinum alloy particles are greatly improved by the use of urea. The disclosed method allows loading of platinum particles or platinum alloy particles having small particle size and uniform size distribution on the support since hydroxide ions homogenously generated in situ by the hydrolysis of urea react with metal salts to form the catalyst complex species deposited on the support.
    Type: Application
    Filed: September 30, 2010
    Publication date: March 17, 2011
    Inventor: Jong-Sung Yu
  • Patent number: 7326396
    Abstract: The present invention relates to a method for preparing nanoporous carbons with enhanced mechanical strength and the nanoporous carbons prepared by the method, and more specifically, to a method for preparing a nanoporous carbon, comprising the steps of (i) synthesizing a mesoporous silica template not being subjected to any calcination process; (ii) incorporating a mixture of a monomer for addition polymerization and initiator, or a mixture of a monomer for condensation polymerization and acid catalyst into the as-synthesized mesoporous silica template, and reacting the mixture to obtain a polymer-silica composite; and (iii) carbonizing the polymer-silica composite at a high temperature to obtain a carbon-silica composite, from which the silica template is then removed using a solvent.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: February 5, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong Sung Yu, Jin Gyu Lee, Seok Chang
  • Patent number: 7157402
    Abstract: The present invention provides a bimodal porous carbon capsule with a hollow core and a mesoporous shell structure, which can be employed as an electrocatalyst support for a fuel cell; electrocatalysts for the fuel cell using the bimodal porous carbon capsule, and a method of preparing the same. The electrocatalyst according to the present invention has higher catalysis activity as compared with the Pt—Ru or Pt catalyst supported by the conventional carbon black, so that the performance of the fuel cell is enhanced, and it can be easily prepared in an aqueous solution state. According to the present invention, the porous carbon support employed as the support for the catalyst has excellent conductivity and a high surface area, so that the loaded catalyst can be prepared with a smaller amount than that of the conventional carbon black.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: January 2, 2007
    Assignee: Hannam University
    Inventors: Jong Sung Yu, Geun Seok Chai, Suk Bon Yoon
  • Publication number: 20060051312
    Abstract: Disclosed is a carbon nanoball for deodorization composed of a circular hollow core, and a porous carbon shell to which at least one deodorizing material selected from the group consisting of transition metal, oxidized transition metal and alkali metal salt is adhered. The porous carbon shell of the carbon nanoball for deodorization has multi layers more than 2 layers having different pore sizes, and a pore formed in an outer layer has a larger average diameter than a pore formed in an inner layer. This multi-layered carbon nanoball for deodorization may absorb various kinds of stink-generating materials together with good deodorizing capability. Thus, the multi-layered carbon nanoball may give excellent deodorizing effects by capturing and dissolving stinky substances when it used as a deodorant for various stinky daily necessaries or in houses, offices, industrial facilities and other various stink-causing circumstances.
    Type: Application
    Filed: June 12, 2003
    Publication date: March 9, 2006
    Applicant: LG HOUSEHOLD AND HEALTHCARE CO., LTD.
    Inventors: Jong-Yun Kim, Jun-Yeob Song, Seung-Kyu Park, Yun-Seog Kang, Suk-Bon Yoon, Jong-Sung Yu
  • Publication number: 20040126354
    Abstract: Disclosed is a nano carbon ball for deodorization composed of porous carbon shells having a spherical hollow core. At least one metal selected from the group consisting of transition metal, oxidized transition metal and alkali metal salt is impregnated to the shell. This nano carbon ball for deodorization may adsorb various kinds of malodor substances together with good deodorizing capability. Thus, the nano carbon ball may give excellent deodorizing effects by capturing and resolving the malodor substances when it used as a deodorant for various daily necessaries or in houses, offices, industrial facilities and other various stinking circumstances.
    Type: Application
    Filed: October 10, 2003
    Publication date: July 1, 2004
    Inventors: Jun-Yeob Song, Jong-Yun Kim, Seung-Kyu Park, Jong-Sung Yu, Yong-Ki Park, Chul-Wee Lee, Yun-Seog Kang
  • Publication number: 20040091415
    Abstract: The present invention relates to a method for preparing nanoporous carbons with enhanced mechanical strength and the nanoporous carbons prepared by the method, and more specifically, to a method for preparing a nanoporous carbon, comprising the steps of (i) synthesizing a mesoporous silica template not being subjected to any calcination process; (ii) incorporating a mixture of a monomer for addition polymerization and initiator, or a mixture of a monomer for condensation polymerization and acid catalyst into the as-synthesized mesoporous silica template, and reacting the mixture to obtain a polymer-silica composite; and (iii) carbonizing the polymer-silica composite at a high temperature to obtain a carbon-silica composite, from which the silica template is then removed using a solvent.
    Type: Application
    Filed: December 23, 2002
    Publication date: May 13, 2004
    Inventors: Jong Sung Yu, Jin Gyu Lee, Seok Chang