Patents by Inventor Yong Hun Cho
Yong Hun Cho 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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Patent number: 11945744Abstract: Disclosed are a method and apparatus for reusing wastewater. The method for reusing wastewater disclosed herein includes: generating a mixed wastewater by mixing multiple types of wastewater (S20); performing a first purification by passing the mixed wastewater through a flocculation-sedimentation unit (S40); performing a second purification by passing an effluent of the flocculation-sedimentation unit through a membrane bioreactor (MBR) (S60); performing a third purification by passing an effluent of the MBR through a reverse-osmosis membrane unit (S80); and reusing an effluent of the reverse-osmosis membrane unit as cooling water or industrial water (S100).Type: GrantFiled: April 14, 2023Date of Patent: April 2, 2024Assignees: SAMSUNG ENGINEERING CO., LTD., SAMSUNG ELECTRONICS CO., LTDInventors: Seok Hwan Hong, Dae Soo Park, Seung Joon Chung, Yong Xun Jin, Jae Hyung Park, Jae Hoon Choi, Jae Dong Hwang, Jong Keun Yi, Su Hyoung Cho, Kyu Won Hwang, June Yurl Hur, Je Hun Kim, Ji Won Chun
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Publication number: 20240079413Abstract: A complementary thin film transistor (TFT) includes a substrate and a first TFT and a second TFT disposed on the substrate, wherein a first conductive semiconductor layer of the first TFT and a second gate electrode layer of the second TFT are disposed in the same layer and include the same material.Type: ApplicationFiled: August 31, 2023Publication date: March 7, 2024Inventors: Himchan OH, Jong-Heon YANG, Ji Hun CHOI, Seung Youl KANG, Yong Hae KIM, Jeho NA, Jaehyun MOON, Chan Woo PARK, Sung Haeng CHO, Jae-Eun PI, Chi-Sun HWANG
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Publication number: 20230299306Abstract: An innovative fuel cell system with membrane electrode assemblies (MEAs) includes a polymer electrolyte membrane, a gas diffusion layer (GDL) made of porous metal foam, and a catalyst layer. A fuel cell has a metal foam layer that improves efficiency and lifetime of the conventional gas diffusion layer, which consists of both gas diffusion barrier (GDB) and microporous layer (MPL). This metal foam GDL enables consistent maintenance of the suitable structure and even distribution of pores during the operation. Due to the combination of mechanical and physical properties of metallic foam, the fuel cell is not deformed by external physical strain. Among many other processing methods of open-cell metal foams, ice-templating provides a cheap, easy processing route suitable for mass production. Furthermore, it provides well-aligned and long channel pores, which improve gas and water flow during the operation of the fuel cell.Type: ApplicationFiled: May 23, 2023Publication date: September 21, 2023Inventors: Yong-Hun Cho, Hyelim Choi, Ok-Hee Kim, Yung-Eun Sung, Heeman Choe
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Patent number: 11658308Abstract: An innovative fuel cell system with membrane electrode assemblies (MEAs) includes a polymer electrolyte membrane, a gas diffusion layer (GDL) made of porous metal foam, and a catalyst layer. A fuel cell has a metal foam layer that improves efficiency and lifetime of the conventional gas diffusion layer, which consists of both gas diffusion barrier (GDB) and microporous layer (MPL). This metal foam GDL enables consistent maintenance of the suitable structure and even distribution of pores during the operation. Due to the combination of mechanical and physical properties of metallic foam, the fuel cell is not deformed by external physical strain. Among many other processing methods of open-cell metal foams, ice-templating provides a cheap, easy processing route suitable for mass production. Furthermore, it provides well-aligned and long channel pores, which improve gas and water flow during the operation of the fuel cell.Type: GrantFiled: March 15, 2021Date of Patent: May 23, 2023Assignee: CellMobility, Inc.Inventors: Yong-Hun Cho, Hyelim Choi, Ok-Hee Kim, Yung-Eun Sung, Heeman Choe
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Publication number: 20230106823Abstract: A fuel cell stack including a plurality of fuel cell units having a truncated cone shape and connected in series with each other is proposed. The series connection of the fuel cell units may be made such that a relatively small outer diameter portion of one of the fuel cell units is inserted into a relatively large outer diameter portion of another fuel cell unit adjacent to the one fuel cell unit.Type: ApplicationFiled: December 8, 2022Publication date: April 6, 2023Inventors: Yung-Eun Sung, Yong-Hun Cho, Wonchan Hwang
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Publication number: 20210351414Abstract: An innovative fuel cell system with membrane electrode assemblies (MEAs) includes a polymer electrolyte membrane, a gas diffusion layer (GDL) made of porous metal foam, and a catalyst layer. A fuel cell has a metal foam layer that improves efficiency and lifetime of the conventional gas diffusion layer, which consists of both gas diffusion barrier (GDB) and microporous layer (MPL). This metal foam GDL enables consistent maintenance of the suitable structure and even distribution of pores during the operation. Due to the combination of mechanical and physical properties of metallic foam, the fuel cell is not deformed by external physical strain. Among many other processing methods of open-cell metal foams, ice-templating provides a cheap, easy processing route suitable for mass production. Furthermore, it provides well-aligned and long channel pores, which improve gas and water flow during the operation of the fuel cell.Type: ApplicationFiled: March 15, 2021Publication date: November 11, 2021Inventors: Yong-Hun Cho, Hyelim Choi, Ok-Hee Kim, Yung-Eun Sung, Heeman Choe
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Patent number: 10978715Abstract: An innovative fuel cell system with MEAs includes a polymer electrolyte membrane, a gas diffusion layer (GDL) made of porous metal foam, and a catalyst layer. A fuel cell has a metal foam layer that improves efficiency and lifetime of the conventional gas diffusion layer, which consists of both gas diffusion barrier (GDB) and microporous layer (MPL). This metal foam GDL enables consistent maintenance of the suitable structure and even distribution of pores during the operation. Due to the combination of mechanical and physical properties of metallic foam, the fuel cell is not deformed by external physical strain. Among many other processing methods of open-cell metal foams, ice-templating provides a cheap, easy processing route suitable for mass production. Furthermore, it provides well-aligned and long channel pores, which improve gas and water flow during the operation of the fuel cell.Type: GrantFiled: June 28, 2013Date of Patent: April 13, 2021Assignee: CellMobility, Inc.Inventors: Yong-Hun Cho, Hyelim Choi, Ok-Hee Kim, Yung-Eun Sung, Heeman Choe
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Publication number: 20190247925Abstract: Using metal foams for the electrode of secondary lithium battery, preparing method thereof, and secondary lithium battery including the metal foam. A metal foam is used in an electrode of secondary lithium battery where the surface and the inner pore walls are coated with the active materials, a method of manufacturing such metal foam, and secondary lithium battery including the metal foam.Type: ApplicationFiled: April 23, 2019Publication date: August 15, 2019Inventors: Ji Hyun Um, Hyeji Park, Myounggeun Choi, Hyelim Choi, Yong-Hun Cho, Yung-Eun Sung, Heeman Choe
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Patent number: 10265773Abstract: Using metal foams for the electrode of secondary lithium battery, preparing method thereof, and secondary lithium battery including the metal foam. A metal foam is used in an electrode of secondary lithium battery where the surface and the inner pore walls are coated with the active materials, a method of manufacturing such metal foam, and secondary lithium battery including the metal foam.Type: GrantFiled: April 18, 2014Date of Patent: April 23, 2019Assignee: CellMobility, Inc.Inventors: Ji Hyun Um, Hyeji Park, Myounggeun Choi, Hyelim Choi, Yong-Hun Cho, Yung-Eun Sung, Heeman Choe
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Publication number: 20180145341Abstract: The present invention relates to a component including graphene foam and functioning as a flow field and a gas diffusion layer (GDL) for a fuel cell. More particularly, a component functioning as a flow field and a GDL for a fuel cell according to the present invention is made of graphene foam that enhances mass transport and suffers no corrosion under operating conditions of the fuel cell when compared with a conventional flow field, thereby realizing excellent performance and durability. Furthermore, the component functions as the GDL so a thickness of a membrane electrode assembly is reduced thereby improving cell performance significantly.Type: ApplicationFiled: November 16, 2017Publication date: May 24, 2018Applicants: Seoul National University, R&DB Foundation, Institute for Basic Science, Kangwon National University, University-Industry Cooperation FoundationInventors: Yung-Eun SUNG, Yong-Hun CHO, Ji Eun PARK, Chi-Yeong AHN, Sungjun KIM
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Publication number: 20180145342Abstract: A flow field including graphene foam for a fuel cell. The flow field is made of graphene foam that enhances mass transport and suffers no corrosion under operating conditions of the fuel cell when compared with conventional flow fields. In addition, compressed graphene foam has smaller in-plane pores due to the compression and has more tortuous pathways for flowing reactants, thereby increasing retention time of reactants and accelerating diffusion of reactants into a gas diffusion layer (GDL). Further, large through-plane pores inside the graphene foam transport reactants to entire areas of a catalyst layer, and faster flow velocity compared with the conventional membrane electrode assembly (MEA) is derived from a decreased flow field width due to compression. Therefore, mass transport of reactants and products is enhanced, and performance of the fuel cell is improved at high current density regions.Type: ApplicationFiled: November 16, 2017Publication date: May 24, 2018Applicants: Seoul National University, R&DB Foundation, Institute for Basic Science, Kangwon National University, University-Industry Cooperation FoundationInventors: Yung-Eun SUNG, Yong-Hun CHO, Ji Eun PARK, Chi-Yeong AHN, Sungjun KIM
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Patent number: 9203093Abstract: The present invention provides an electrode for a polymer electrolyte membrane fuel cell. In one embodiment, a planar nanoporous or microporous metal foam or metal aerogel structure is provided, from which an electrode with a catalyst layer integrally formed by fixing a catalyst in the metal foam or metal aerogel is formed.Type: GrantFiled: July 6, 2011Date of Patent: December 1, 2015Assignees: Hyundai Motor Company, SNU R&DB FoundationInventors: Nak Hyun Kwon, In Chul Hwang, Jae Seung Lee, Bum Wook Roh, Yung Eun Sung, Ju Wan Lim, Yoon Hwan Cho, Nam Gee Jung, Hee Man Choe, Yong Hun Cho
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Patent number: 9123965Abstract: The present invention provides a method of synthesizing a nano-sized transition metal catalyst on a carbon support, including dissolving a stabilizer in ethanol thus preparing a mixture solution, adding a support to the mixture solution thus preparing a dispersion solution, dissolving a transition metal precursor in ethanol thus preparing a precursor solution, mixing the precursor solution with the dispersion solution with stirring, and then performing reduction, thus preparing the nano-sized transition metal catalyst. This method enables the synthesis of transition metal nanoparticles supported on carbon powder having a narrow particle size distribution and a wide degree of dispersion through a simple process, and is thus usefully applied to the formation of an electrode material or the like of a fuel cell.Type: GrantFiled: May 6, 2010Date of Patent: September 1, 2015Assignees: Hyundai Motor Company, SNU R&DB FoundationInventors: Nak Hyun Kwon, Inchul Hwang, Jae Seung Lee, Yung-Eun Sung, Tae-Yeol Jeon, Sung Jong Yoo, Kug-Seung Lee, Yong-Hun Cho
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Publication number: 20150072236Abstract: Using metal foams for the electrode of secondary lithium battery, preparing method thereof, and secondary lithium battery including the metal foam. A metal foam is used in an electrode of secondary lithium battery where the surface and the inner pore walls are coated with the active materials, a method of manufacturing such metal foam, and secondary lithium battery including the metal foam.Type: ApplicationFiled: April 18, 2014Publication date: March 12, 2015Inventors: Ji Hyun Um, Hyeji Park, Myounggeun Choi, Hyelim Choi, Yong-Hun Cho, Yung-Eun Sung, Heeman Choe
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Publication number: 20140230890Abstract: A dye-sensitized solar cell has a working electrode, electrolyte, and counter electrode. The counter electrode includes a nickel (Ni) foam, titanium (Ti) foam, manganese (Mn) foam, or molybdenum (Mo) foam, and has a surface that is nitrided. The reaction efficiency for the solar cell is enhanced by the increased surface area reacting with the electrolyte, which results from using a metal foam. Mechanical properties, such as strength and ductility, and electroconductivity are improved due to the use of metals. The production costs are reduced by using substitute materials, which are low-cost and have oxidation-reduction efficiency.Type: ApplicationFiled: September 18, 2013Publication date: August 21, 2014Applicant: CellMotive Co. Ltd.Inventors: Sunha Park, Yong-Hun Cho, Hyungyung Jo, Myounggeun Choi, Yung-Eun Sung, Heeman Choe
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Publication number: 20140004441Abstract: An innovative fuel cell system with MEAs includes a polymer electrolyte membrane, a gas diffusion layer (GDL) made of porous metal foam, and a catalyst layer. A fuel cell has a metal foam layer that improves efficiency and lifetime of the conventional gas diffusion layer, which consists of both gas diffusion barrier (GDB) and microporous layer (MPL). This metal foam GDL enables consistent maintenance of the suitable structure and even distribution of pores during the operation. Due to the combination of mechanical and physical properties of metallic foam, the fuel cell is not deformed by external physical strain. Among many other processing methods of open-cell metal foams, ice-templating provides a cheap, easy processing route suitable for mass production. Furthermore, it provides well-aligned and long channel pores, which improve gas and water flow during the operation of the fuel cell.Type: ApplicationFiled: June 28, 2013Publication date: January 2, 2014Inventors: Yong-Hun Cho, Hyelim Choi, Ok-Hee Kim, Yung-Eun Sung, Heeman Choe
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Publication number: 20120244457Abstract: The present invention provides an electrode for a polymer electrolyte membrane fuel cell. In one embodiment, a planar nanoporous or microporous metal foam or metal aerogel structure is provided, from which an electrode with a catalyst layer integrally formed by fixing a catalyst in the metal foam or metal aerogel is formed.Type: ApplicationFiled: July 6, 2011Publication date: September 27, 2012Applicants: SNU R&DB FOUNDATION, HYUNDAI MOTOR COMPANYInventors: Nak Hyun Kwon, In Chul Hwang, Jae Seung Lee, Bum Wook Roh, Yung Eun Sung, Ju Wan Lim, Yoon Hwan Cho, Nam Gee Jung, Hee Man Choe, Yong Hun Cho
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Patent number: 8119306Abstract: A bipolar plate and a direct liquid feed fuel cell stack are provided. The bipolar plate includes a manifold that is coupled with the fuel/oxidant path holes and a plurality of flow channels that are coupled with the manifold. The flow channels are divided into a plurality of groups, where the flow channel of each group forms a serpentine flow path and a length of each flow channel is substantially the same.Type: GrantFiled: November 28, 2005Date of Patent: February 21, 2012Assignee: Samsung SDI Co., Ltd.Inventors: Kyoung Hwan Choi, Jong-koo Lim, Yong-hun Cho, Il Moon
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Publication number: 20110318668Abstract: Disclosed herein are a membrane-electrode assembly for a fuel cell, a fuel cell, and a manufacturing method thereof. The present invention forms a micro current collecting layer between a gas diffusion layer and a micro porous layer and surface-contacts a pair of laminates for an electrode so that each electrolyte layer formed by applying an electrolyte solution thereon contacts with each other, thereby shortening a moving distance of electrons to minimize the current collecting resistance and loss and reduce the interface resistance.Type: ApplicationFiled: March 28, 2011Publication date: December 29, 2011Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Eon Soo Lee, Yung Eun Sung, Min Jeh Ahn, Yong Hun Cho, Nam Gee Jung, Jae Hyuk Jang
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Patent number: 7951506Abstract: A bipolar plate for fuel cells includes a plurality of flow paths in which fuel flows. The flow paths include a first flow path formed by a plurality of flow channels and a second flow path formed by a plurality of islands. A direct liquid fuel cell stack comprises the bipolar plate.Type: GrantFiled: November 14, 2005Date of Patent: May 31, 2011Assignee: Samsung SDI Co., Ltd.Inventors: Kyoung Hwan Choi, Jong-koo Lim, Yong-hun Cho, Il Moon