Patents by Inventor Kook Il Han
Kook Il 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).
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Publication number: 20240120501Abstract: Disclosed are an electrode slurry for a fuel cell capable of forming a multilayer structure without an interface using a first support and a second support having different mesopore fractions and densities, a multilayer electrode structure using the same, and a manufacturing method thereof. The electrode slurry for a fuel cell includes a first catalyst including a first support on which a first metal is supported, a second catalyst including a second support on which a second metal is supported, an ionomer, and a solvent, the first support and the second support having different mesopore fractions and densities.Type: ApplicationFiled: May 26, 2023Publication date: April 11, 2024Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATIONInventors: Ji Hoon Yang, Geon Hee Cho, Kook Il Han, Yoon Hwan Cho
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Patent number: 11688871Abstract: Disclosed are an electrode for a membrane-electrode assembly, a method of manufacturing the same and a membrane-electrode assembly using the same. The electrode may include the pores and pore density around a catalyst contained in the electrode may be selectively increased using a thermally decomposable chemical blowing agent, thereby improving mass transfer through the catalyst.Type: GrantFiled: November 23, 2020Date of Patent: June 27, 2023Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Byeong Gab Ji, Su Won Seol, Dong Hwan Yoon, Kook Il Han, Yoon Hwan Cho
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Publication number: 20230187673Abstract: A membrane electrode assembly and a method of manufacturing an electricity generating assembly include a pair of gas diffusion layers disposed on both surfaces of the membrane electrode assembly. Coupling agents are applied on surfaces of the gas diffusion layers, modifying surfaces of the gas diffusion layers. A coupling agent-friendly adhesive is applied to the surfaces of the gas diffusion layers to which the coupling agents are applied, forming adhesion layers on surfaces of the gas diffusion layers. The gas diffusion layers are stacked on the surfaces of the membrane electrode assembly, causing the adhesion layers to come into contact with the first and second surfaces of the membrane electrode assembly.Type: ApplicationFiled: November 9, 2022Publication date: June 15, 2023Applicants: Hyundai Motor Company, Kia CorporationInventors: Kweon Ju Park, Se Joon Im, Ju Young Lee, Min June Choi, Kook Il Han, Ju Hee Lee
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Patent number: 11581548Abstract: Disclosed herein is a method of manufacturing a support for a catalyst of a fuel cell. The method may include preparing an admixture including a carbon material and a cerium precursor into a reactor, providing the admixture in a reactor, raising a temperature of the reactor to a predetermined temperature, and introducing water vapor into the reactor to perform an activation reaction of the carbon material.Type: GrantFiled: September 28, 2021Date of Patent: February 14, 2023Assignees: Hyundai Motor Company, Kia CorporationInventors: Geon Hee Cho, Ji Hoon Yang, Kook Il Han, Jin Seong Choi
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Patent number: 11374233Abstract: An apparatus for manufacturing a gas diffusion layer for fuel cells includes: a conveyer transferring a base sheet for a macroporous layer of the gas diffusion layer in one direction before water repellent coating; a nozzle disposed around the conveyer to coat the transferring base sheet with a water repellent in a fiber type or desired pattern; and a nozzle transfer unit combined with an upper end of the nozzle to transfer the nozzle along a desired trajectory.Type: GrantFiled: July 25, 2016Date of Patent: June 28, 2022Assignee: Hyundai Motor CompanyInventors: Kook Il Han, Yoo Chang Yang, Sang Mun Jin
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Publication number: 20220181644Abstract: Disclosed are a method of manufacturing a carbon support for a fuel cell catalyst, a carbon support for a fuel cell catalyst manufactured according to the method, and a catalyst for a fuel cell including the same. The method may include using various organic materials containing N and various carbon supports and thus provide excellent economic feasibility. In addition, pyridinic N and pyrrolic N of doped N can be adjusted at an optimal content ratio so that the carbon support for a fuel cell catalyst manufactured and the catalyst for a fuel cell including the same have excellent electrochemical resistance and excellent electrochemical characteristic due to an increase in an electrochemically active surface area, and excellent durability due to an increase in thermal durability.Type: ApplicationFiled: March 30, 2021Publication date: June 9, 2022Inventors: Ji Hoon Yang, Jin Seong Choi, Kook Il Han, Geon Hee Cho, Jin Woo Lee, Ah Ryeon Lee
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Publication number: 20220166032Abstract: Disclosed herein is a method of manufacturing a support for a catalyst of a fuel cell. The method may include preparing an admixture including a carbon material and a cerium precursor into a reactor, providing the admixture in a reactor, raising a temperature of the reactor to a predetermined temperature, and introducing water vapor into the reactor to perform an activation reaction of the carbon material.Type: ApplicationFiled: September 28, 2021Publication date: May 26, 2022Inventors: Geon Hee Cho, Ji Hoon Yang, Kook Il Han, Jin Seong Choi
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Publication number: 20210175516Abstract: The present disclosure relates to a method of manufacturing catalyst slurry for fuel cells capable of greatly improving efficiency in use of catalyst metal and a method of manufacturing an electrode for fuel cells using the catalyst slurry manufactured using the method. Specifically, the method of manufacturing catalyst slurry for fuel cells includes preparing a catalyst including a porous carrier and catalyst metal, introducing the catalyst, a solvent, and an ionomer into a chamber, and infiltrating the ionomer into pores of the carrier.Type: ApplicationFiled: June 15, 2020Publication date: June 10, 2021Inventors: Yoon Hwan Cho, Kook Il Han, Su Won Seol
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Patent number: 10826082Abstract: A fuel cell and a method for producing the same are provided. The fuel cell includes a membrane electrode assembly and a gas diffusion layer that is disposed at each of opposite surfaces of the membrane electrode assembly, and includes a plurality of compressed parts that are formed by pressure at positions spaced out at predetermined intervals on the gas diffusion layer. The fuel cell further includes a separator that is in contact with an outer surface of the gas diffusion layer, and has a plurality of land parts that protrude toward the gas diffusion layer, and a plurality of channel parts that form flow paths between the land parts. The land parts respectively protrude toward the compressed parts of the gas diffusion layer to come in contact with the compressed parts.Type: GrantFiled: September 2, 2016Date of Patent: November 3, 2020Assignee: Hyundai Motor CompanyInventors: Suk Min Baeck, Dae Il Yoon, Yoo Chang Yang, Kook Il Han
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Patent number: 10629918Abstract: The present invention provides a fuel cell stack with enhanced freeze-thaw durability. In particular, the fuel cell stack includes a gas diffusion layer between a membrane-electrode assembly and a bipolar plate. The gas diffusion layer has a structure that reduces contact resistance in a fuel cell and is cut at a certain angle such that the machine direction (high stiffness direction) of GDL roll is not in parallel with the major flow field direction of the bipolar plate, resulting in an increased GDL stiffness in a width direction perpendicular to a major flow field direction of a bipolar plate.Type: GrantFiled: April 1, 2011Date of Patent: April 21, 2020Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Bo Ki Hong, Kook Il Han, Sae Hoon Kim, Jae Jun Ko
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Patent number: 10593957Abstract: In one embodiment, a gas diffusion layer for fuel cells includes a fine porous layer formed on a carbon fiber support and being interposed between a membrane-electrode assembly (MEA) and a separator. The carbon fiber support includes a fine pore area having a predetermined average pore size in a separator direction (thickness direction) in the membrane electrode assembly, and a coarse pore area having a larger predetermined average pore size than the average pore size of the fine pore area in the separator direction (thickness direction) in the membrane electrode assembly. The fine pore area and the coarse pore area are alternately formed.Type: GrantFiled: July 31, 2017Date of Patent: March 17, 2020Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Jae Man Park, Kook Il Han, Ji Han Lee
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Patent number: 10511043Abstract: A gas diffusion layer (GDL) for fuel cell applications that can prevented channels of a bipolar plate from being intruded. The gas diffusion layer is manufactured by cutting a GDL material at a certain angle such that a machine direction of the inherent high stiffness of the GDL material is not in parallel with a major flow field direction of a bipolar plate to prevent the GDL intrusion into the channels of the bipolar plate without modifying an existing method for manufacturing the gas diffusion layer. With the gas diffusion layer, the electrochemical performance of the fuel cell can be improved and manufacturing process can be improved even in the case where the width of the rolled GDL material is small.Type: GrantFiled: February 10, 2010Date of Patent: December 17, 2019Assignee: Hyundai Motor CompanyInventors: Bo Ki Hong, Kook Il Han
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Patent number: 10431838Abstract: A gas diffusion layer (GDL) for fuel cell applications that can prevented channels of a bipolar plate from being intruded. The gas diffusion layer is manufactured by cutting a GDL material at a certain angle such that a machine direction of the inherent high stiffness of the GDL material is not in parallel with a major flow field direction of a bipolar plate to prevent the GDL intrusion into the channels of the bipolar plate without modifying an existing method for manufacturing the gas diffusion layer. With the gas diffusion layer, the electrochemical performance of the fuel cell can be improved and manufacturing process can be improved even in the case where the width of the rolled GDL material is small.Type: GrantFiled: February 18, 2014Date of Patent: October 1, 2019Assignee: Hyundai Motor CompanyInventors: Bo Ki Hong, Kook Il Han
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Patent number: 10320008Abstract: A porous separator for a fuel cell is provided and features the shape of a passage aperture formed in a flow field plate. The modified shape of the passage aperture minimizes destruction of a gas diffusion layer or a membrane electrode assembly attributable to stress concentration. The porous separator has a flow field plate that includes a first contact portion that is in contact with a gas diffusion layer or a membrane electrode assembly; a second contact portion that is in contact with a coolant channel; and a connection portion that is connected between the first contact portion and the second contact portion. Additionally, a passage aperture is formed in the connection portion, wherein a portion of an inside surface of the passage aperture protrudes toward a center of the passage aperture.Type: GrantFiled: March 30, 2016Date of Patent: June 11, 2019Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Sang Mun Jin, Kook Il Han
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Patent number: 10103392Abstract: A membrane-electrode assembly (MEA) for fuel cells includes an electricity-generating array including an anode, a cathode, and an electrolyte membrane. A subgasket array includes an anode subgasket surrounding a periphery of the anode and a cathode subgasket surrounding a periphery of the cathode. A junction array includes a polar junction and a nonpolar junction surrounding a periphery of the electrolyte membrane and attaching the anode subgasket and the cathode subgasket to each other.Type: GrantFiled: June 18, 2014Date of Patent: October 16, 2018Assignee: HYUNDAI MOTOR COMPANYInventors: Bo Ki Hong, Kook Il Han, Ji Yeon Park, Byeong Heon Jeong, Sang Hyun Cho, Chae Won Lim
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Publication number: 20180175393Abstract: In one embodiment, a gas diffusion layer for fuel cells includes a fine porous layer formed on a carbon fiber support and being interposed between a membrane-electrode assembly (MEA) and a separator. The carbon fiber support includes a fine pore area having a predetermined average pore size in a separator direction (thickness direction) in the membrane electrode assembly, and a coarse pore area having a larger predetermined average pore size than the average pore size of the fine pore area in the separator direction (thickness direction) in the membrane electrode assembly. The fine pore area and the coarse pore area are alternately formed.Type: ApplicationFiled: July 31, 2017Publication date: June 21, 2018Inventors: Jae Man Park, Kook Il Han, Ji Han Lee
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Patent number: 9923222Abstract: Disclosed is a fuel cell with enhanced mass transfer characteristics in which a highly hydrophobic porous medium, which is prepared by forming a micro-nano dual structure in which nanometer-scale protrusions with a high aspect ratio are formed on the surface of a porous medium with a micrometer-scale roughness by plasma etching and then by depositing a hydrophobic thin film thereon, is used as a gas diffusion layer, thereby increasing hydrophobicity due to the micro-nano dual structure and the hydrophobic thin film. When this highly hydrophobic porous medium is used as a gas diffusion layer for a fuel cell, it is possible to reduce water flooding by efficiently discharging water produced by an electrochemical reaction of the fuel cell and to improve the performance of the fuel cell by facilitating the supply of reactant gases such as hydrogen and air (oxygen) to a membrane-electrode assembly (MEA).Type: GrantFiled: December 23, 2014Date of Patent: March 20, 2018Assignees: Hyundai Motor Company, Korea Institute of Science and TechnologyInventors: Bo Ki Hong, Sae Hoon Kim, Kook Il Han, Kwang Ryeol Lee, Myoung Woon Moon
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Patent number: 9847535Abstract: The present invention provides a fuel cell stack with enhanced freeze-thaw durability. In particular, the fuel cell stack includes a gas diffusion layer between a membrane-electrode assembly and a bipolar plate. The gas diffusion layer has a structure that reduces contact resistance in a fuel cell and is cut at a certain angle such that the machine direction (high stiffness direction) of GDL roll is not in parallel with the major flow field direction of the bipolar plate, resulting in an increased GDL stiffness in a width direction perpendicular to a major flow field direction of a bipolar plate.Type: GrantFiled: December 12, 2014Date of Patent: December 19, 2017Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Bo Ki Hong, Kook Il Han, Sae Hoon Kim, Jae Jun Ko
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Publication number: 20170346105Abstract: A fuel cell and a method for producing the same are provided. The fuel cell includes a membrane electrode assembly and a gas diffusion layer that is disposed at each of opposite surfaces of the membrane electrode assembly, and includes a plurality of compressed parts that are formed by pressure at positions spaced out at predetermined intervals on the gas diffusion layer. The fuel cell further includes a separator that is in contact with an outer surface of the gas diffusion layer, and has a plurality of land parts that protrude toward the gas diffusion layer, and a plurality of channel parts that form flow paths between the land parts. The land parts respectively protrude toward the compressed parts of the gas diffusion layer to come in contact with the compressed parts.Type: ApplicationFiled: September 2, 2016Publication date: November 30, 2017Inventors: Suk Min Baeck, Dae Il Yoon, Yoo Chang Yang, Kook Il Han
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Patent number: 9819034Abstract: Disclosed is a stack for simulating a cell voltage reversal behavior in a fuel cell. The stack is configured to have a structure in which a separator of a portion of a plurality of cells in the stack have an inlet of a hydrogen flow field partially blocked to induce hydrogen starvation only in the portion of the plurality of cells.Type: GrantFiled: November 15, 2016Date of Patent: November 14, 2017Assignee: Hyundai Motor CompanyInventors: Bo Ki Hong, Kook Il Han, Ji Yeon Park, Se Joon Im