Patents by Inventor Ji Haeng Yu

Ji Haeng 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: 20220310332
    Abstract: Disclosed herein is an electrochemical device forming a chip-capacitor or a super-capacitor. The electrochemical device includes: a ceramic substrate having a nonconductive ceramic layer, a current collecting layer disposed on a nonconductive ceramic layer and made of ceramic or cermet, and a metal layer arranged on outer surfaces of the nonconductive ceramic layer and the current collecting layer; an electrode having a positive electrode and a negative electrode and formed on the current collecting layer; and a nonconductive ceramic packaging module located on the ceramic substrate to accommodate electrolyte therein, wherein the metal layer is exposed to the outside of the nonconductive ceramic packaging module.
    Type: Application
    Filed: May 10, 2021
    Publication date: September 29, 2022
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Jung Joon YOO, Ji Haeng YU, Kyong Sik YUN, Jeong Hun BAEK, Hyeon Jin KIM
  • Patent number: 11433384
    Abstract: A nitrogen-doped catalyst for oxidative coupling of methane, which is a catalyst for obtaining a C2 hydrocarbon product with high yield, and a method for manufacturing the catalyst are provided. An embodiment of the present inventive concept relates to a nitrogen-doped catalyst for oxidative coupling of methane having a silica support; and sodium tungstate and manganese supported on the support.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: September 6, 2022
    Assignee: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Hee-yeon Kim, Tae-woo Kim, Ji-haeng Yu, Dae Keun Lee
  • Publication number: 20220161249
    Abstract: A nitrogen-doped catalyst for oxidative coupling of methane, which is a catalyst for obtaining a C2 hydrocarbon product with high yield, and a method for manufacturing the catalyst are provided. An embodiment of the present inventive concept relates to a nitrogen-doped catalyst for oxidative coupling of methane having a silica support; and sodium tungstate and manganese supported on the support.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 26, 2022
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Hee-yeon KIM, Tae-woo Kim, Ji-haeng Yu, Dae Keun Lee
  • Patent number: 10017866
    Abstract: The present disclosure relates to an ammonia synthesis apparatus, and more particularly, to an electrochemical ammonia synthesis apparatus using an aqueous solution or a molten liquid of an alkali metal as an electrolyte. According to one or more embodiments, when an aqueous solution or a molten liquid of an alkali metal is used as an electrolyte in an ammonia synthesis apparatus, compositions, sizes, and shapes of an electrode and an electrolyte may be easily controlled, and thus a yield of ammonia synthesis may improve.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: July 10, 2018
    Assignee: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Chung-yul Yoo, Hyung-chul Yoon, Ji-haeng Yu, Jong Hoon Joo, Jong-nam Kim
  • Patent number: 9831517
    Abstract: A unit cell includes an air inlet/outlet that is formed on a frame unit rather than being installed in a fuel electrode (anode) to simplify a sealing process, and accordingly, a continuous process using a tape casting technique may be performed. In addition, an electrolyte material that is in contact with an air electrode (cathode) in the frame unit is optimized to improve ion conductivity and a porosity of an upper layer material of the fuel electrode unit is optimized to increase fuel diffusion from a gas channel to an electrolyte layer. In addition, a sealing process performed inside the unit cell or between the unit cells of the stack is stabilized and strongly maintained, and thus a fuel cell using the unit cell and the stack disclosed herein may have excellent economic feasibility and high energy efficiency.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: November 28, 2017
    Assignee: KOEA INSTITUTE OF ENERGY RESEARCH
    Inventors: Ji Haeng Yu, Jong Hoon Joo, Chung-Yul Yoo
  • Patent number: 9806360
    Abstract: The present invention relates to a unit cell for a solid-oxide fuel cell and to a solid-oxide fuel cell using same, and, more specifically, relates to: a unit cell for a solid-oxide fuel cell, wherein a fuel charging-and-discharging part and an air charging-and-discharging part are provided perpendicularly to a cathode comprised in the solid-oxide fuel cell; and a solid-oxide fuel cell using same.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: October 31, 2017
    Assignee: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Ji-Haeng Yu, In-Sub Han, Doo-Won Seo, Se-Young Kim, Sang-Kuk Woo, Sun-Dong Kim
  • Patent number: 9741497
    Abstract: Disclosed is an insulating bonding part for bonding to a solid electrolyte including beta-alumina, the insulating bonding part comprising a plurality of layers which have different mixing ratios of the alpha-alumina and CaO, wherein the layer closer to the solid electrolyte including the beta-alumina has a higher ratio of the CaO, and wherein the layer farther from the solid electrolyte including the beta-alumina has a higher ratio of the alpha-alumina.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: August 22, 2017
    Assignee: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Se-Young Kim, Sang-Kuk Woo, Sun-Dong Kim, Jong-Hoon Joo, In-Sub Han, Doo-Won Seo, Ji-Haeng Yu
  • Patent number: 9724640
    Abstract: The present invention provides: an electrode-supporting type of gas-separation membrane module for selectively effecting the passage of a gas via an electron exchange reaction due to a coupling-material layer and gas exchange via an ion-conducting separation layer; a tubular structure of same; a production method for the tubular structure; and a hydrocarbon-reforming method using the gas-separation membrane module. The present invention is advantageous in that outstanding chemical and mechanical durability can be ensured by using a fluorite-based ion-conducting membrane which is chemically stable in CO2 and H2O atmospheres in particular, at high temperature, and in that a pure gas can be produced inexpensively since the passage of gas occurs due to an internal circuit even without applying a voltage from the outside.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: August 8, 2017
    Assignee: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Jong Hoon Joo, Ji Haeng Yu, Chung-Yul Yoo
  • Publication number: 20170005341
    Abstract: The present disclosure discloses an oxygen separation membrane with high permeability coated with electroactive materials on both sides thereof in which electronic conductive materials and ionic conductive materials are mixed in an optimal ratio whereby the oxygen separation membrane according to the present disclosure has high oxygen permeability and a good thermal stability. Further the present membrane can be advantageously prepared using a simple process such as Tape casting and using a simple sintering process.
    Type: Application
    Filed: January 21, 2016
    Publication date: January 5, 2017
    Inventors: Ji-haeng YU, Jong-hoon JOO, Kyung Sic YUN, Chung-yul YOO
  • Publication number: 20160138176
    Abstract: The present disclosure relates to an ammonia synthesis apparatus, and more particularly, to an electrochemical ammonia synthesis apparatus using an aqueous solution or a molten liquid of an alkali metal as an electrolyte. According to one or more embodiments, when an aqueous solution or a molten liquid of an alkali metal is used as an electrolyte in an ammonia synthesis apparatus, compositions, sizes, and shapes of an electrode and an electrolyte may be easily controlled, and thus a yield of ammonia synthesis may improve.
    Type: Application
    Filed: September 30, 2015
    Publication date: May 19, 2016
    Inventors: Chung-yul Yoo, Hyung-chul Yoon, Ji-haeng Yu, Jong Hoon Joo, Jong-nam Kim
  • Publication number: 20160064767
    Abstract: A unit cell includes an air inlet/outlet that is formed on a frame unit rather than being installed in a fuel electrode (anode) to simplify a sealing process, and accordingly, a continuous process using a tape casting technique may be performed. In addition, an electrolyte material that is in contact with an air electrode (cathode) in the frame unit is optimized to improve ion conductivity and a porosity of an upper layer material of the fuel electrode unit is optimized to increase fuel diffusion from a gas channel to an electrolyte layer. In addition, a sealing process performed inside the unit cell or between the unit cells of the stack is stabilized and strongly maintained, and thus a fuel cell using the unit cell and the stack disclosed herein may have excellent economic feasibility and high energy efficiency.
    Type: Application
    Filed: August 27, 2015
    Publication date: March 3, 2016
    Inventors: Ji Haeng YU, Jong Hoon JOO, Chung-Yul YOO
  • Patent number: 9269971
    Abstract: Disclosed herein is a flat-tubular solid oxide cell stack in which the pathway of chemical reactions is long and the temperature and flow rate of feed gas are maintained at uniform levels, thus the efficiency of electrical energy generation is increased when the cell stack is used as a fuel cell, and the purity of generated gas (hydrogen) is increased when the cell stack is used as a high-temperature electrolyzer.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: February 23, 2016
    Assignee: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Doo-Won Seo, Sun-Dong Kim, In-Sub Han, Ji-Haeng Yu, Se-Young Kim, Sang-Kuk Woo
  • Publication number: 20150328582
    Abstract: The present invention provides: an electrode-supporting type of gas-separation membrane module for selectively effecting the passage of a gas via an electron exchange reaction due to a coupling-material layer and gas exchange via an ion-conducting separation layer; a tubular structure of same; a production method for the tubular structure; and a hydrocarbon-reforming method using the gas-separation membrane module. The present invention is advantageous in that outstanding chemical and mechanical durability can be ensured by using a fluorite-based ion-conducting membrane which is chemically stable in CO2 and H2O atmospheres in particular, at high temperature, and in that a pure gas can be produced inexpensively since the passage of gas occurs due to an internal circuit even without applying a voltage from the outside.
    Type: Application
    Filed: October 31, 2013
    Publication date: November 19, 2015
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Jong Hoon JOO, Ji Haeng YU, Chung-Yul YOO
  • Patent number: 9156741
    Abstract: The present invention provides a method of preparing a carbon fiber-reinforced silicon carbide composite material, wherein carbon nanotubes are formed in the composite material, and then metal silicon is melted and infiltrated into the composite material, so the amount of unreacted metal is reduced and the strength of the composite material is improved, and provides a carbon fiber-reinforced silicon carbide composite material prepared by the method.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: October 13, 2015
    Assignee: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Se-Young Kim, Nam-Jo Jeong, In-Sub Han, Sang-Kuk Woo, Doo-Won Seo, Kang Bai, Ji-Haeng Yu, Sun-Dong Kim
  • Patent number: 9123917
    Abstract: The present invention relates to a solid oxide fuel cell, which includes a plurality of unit cells and a connection layer between the plurality of unit cells, wherein each of the unit cells includes an anode, a cathode and a solid electrolyte between the anode and the cathode, and the connection layer includes i) a first layer containing La-ferrite including one or more selected from the group consisting of Sr, Ca and Ba; and ii) a second layer containing La-ferrite including one or more selected from the group consisting of Sr, Ca and Ba, and one or more cerias selected from the group consisting of GDC (Gd doped ceria), LDC (La-doped ceria) and SDC (Sm-doped ceria), wherein the first layer is in contact with the cathode of each of the unit cells and the second layer is in contact with the anode of each of the unit cells.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: September 1, 2015
    Assignee: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Ji-Haeng Yu, Hee-Lak Lee, In-Sub Han, Doo-Won Seo, Kee-Seog Hong, Se-Young Kim, Sang-Kuk Woo, Sun-Dong Kim
  • Patent number: 9028914
    Abstract: Disclosed herein is a method of manufacturing a high-density fiber reinforced ceramic composite material, including the steps of: 1) impregnating a fiber preform material multi-coated with pyrolytic carbon and silicon carbide to form impregnated fiber reinforced plastic composite material; 2)carbonizing the impregnated fiber reinforced plastic composite material to form carbonized fiber composite material; 3) a primary reaction-sintering of the fiber composite material; 4) cooling the primarily reaction-sintered fiber composite material down to room temperature and then impregnating the primarily reaction-sintered fiber composite material with a solution in which a polymer precursor for producing silicon carbide (SiC) is dissolved in a hexane (n-hexane) solvent; and 5) a secondary reaction-sintering of the fiber composite material; and a high-density fiber reinforced ceramic composite material manufactured using the method.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: May 12, 2015
    Assignee: Korea Institute of Energy Research
    Inventors: In-Sub Han, Se-Young Kim, Sang-Kuk Woo, Doo-Won Seo, Kang Bai, Ji-Haeng Yu, Sun-Dong Kim
  • Patent number: 8999594
    Abstract: This invention relates to a unit cell for a flat-tubular solid oxide fuel cell or solid oxide electrolyzer, and a flat-tubular solid oxide fuel cell and a flat-tubular solid oxide electrolyzer using the same, and more particularly to a unit cell for a flat-tubular solid oxide fuel cell or solid oxide electrolyzer, wherein the unit cell includes a connector including connection parts, thus decreasing the thickness of the unit cell and reducing the size of a cell stack, and to a flat-tubular solid oxide fuel cell and a flat-tubular solid oxide electrolyzer using the same.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: April 7, 2015
    Assignee: Korea Institute of Energy Research
    Inventors: Sun-Dong Kim, Doo-Won Seo, In-Sub Han, Ji-Haeng Yu, Se-Young Kim, Sang-Kuk Woo
  • Publication number: 20150024299
    Abstract: The present invention relates to a unit cell for a solid-oxide fuel cell and to a solid-oxide fuel cell using same, and, more specifically, relates to: a unit cell for a solid-oxide fuel cell, wherein a fuel charging-and-discharging part and an air charging-and-discharging part are provided perpendicularly to a cathode comprised in the solid-oxide fuel cell; and a solid-oxide fuel cell using same.
    Type: Application
    Filed: February 12, 2013
    Publication date: January 22, 2015
    Inventors: Ji-Haeng Yu, In-Sub Han, Doo-Won Seo, Se-Young Kim, Sang-Kuk Woo, Sun-Dong Kim
  • Patent number: 8932779
    Abstract: A device for a solid oxide fuel cell or a solid oxide electrolysis cell includes an integral one-piece construction of a current collector and a manifold. The device eliminates the need for a brazing or thermal bonding process for joining the manifold with the current collector, and thus makes it possible to prevent breakdown of the junction formed between the manifold and the current collector, which can lead to gas leakage through the junction, and thus can be used for a long period of time.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: January 13, 2015
    Assignee: Korea Institute of Energy Research
    Inventors: Sun-Dong Kim, Doo-Won Seo, In-Sub Han, Ji-Haeng Yu, Se-Young Kim, Sang-Kuk Woo
  • Patent number: 8927172
    Abstract: Disclosed herein is a flat-tubular solid oxide cell stack. The cell stack includes a plurality of unit cells which are stacked one on top of another. Each unit cell includes a flat-tubular electrode support made of a porous conductive material. A first-gas flow channel is formed in the electrode support in a longitudinal direction thereof. First gas flows along the first-gas flow channel. A second-gas flow channel is formed on the outer surface of the electrode support. Second-gas flows along the second-gas flow channel. A connection hole is formed on each of opposite ends of the first-gas flow channel of each of the unit cells and communicates with the first-gas flow channel of the adjacent unit cell so that the first gas flows along the unit cells in a zigzag manner in the longitudinal directions of the unit cells.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: January 6, 2015
    Assignee: Korea Institute of Energy Research
    Inventors: Sun-Dong Kim, Ji-Haeng Yu, In-Sub Han, Doo-Won Seo, Kee-Seog Hong, Se-Young Kim, Sang-Kuk Woo