Patents by Inventor Yung-eun Sung
Yung-eun Sung 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: 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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Publication number: 20230226604Abstract: Alloy nanoparticles, and a method for forming the alloy nanoparticles, an alloy nanocatalyst comprising the alloy nanoparticles are provided. The alloy nanoparticles are formed by a method comprising mixing a first metal complex including a first metal and a second metal complex including a second metal to form a multimetal compound and heat-treating the multimetal compound to form an alloy compound. The first metal and the second metal comprise transition metal, the first metal complex comprises a pyridine-based ligand, and a carbon shell containing N is formed on the surface of the alloy compound by the heat treatment.Type: ApplicationFiled: May 7, 2021Publication date: July 20, 2023Inventors: Taeghwan HYEON, Yung-Eun SUNG, Tae Yong YOO, Ji Mun YOO
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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: 20220336821Abstract: A method for preparing a transition metal electrochemical catalyst according to an embodiment of the present disclosure includes dissolving a nitrogen precursor and a transition metal precursor in a polyol-based solvent so as to prepare a solution in which transition metal ions and free anions are coordinated, and mixing same with a support so as to prepare a mixture, igniting the mixture so as to carbonize the polyol-based solvent, thereby forming transition metal nanoparticles encompassed by carbon, performing heat treatment in order to carbonize remaining organic matter contained in the mixture, and removing, through acid treatment, impurities and transition metal nanoparticles not encompassed by carbon, and then removing remaining acid through washing and additional heat treatment, thereby a nanocatalyst having a structure in which a single-atom transition metal-nitrogen bonding structure and/or transition metal nanoparticles encompassed by carbon exist is synthesized.Type: ApplicationFiled: October 8, 2020Publication date: October 20, 2022Inventors: Jae Kook KIM, Yung Eun SUNG, Kug Seung LEE, Mi Ju KIM, Sung Jin KIM
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Publication number: 20220267912Abstract: A catalyst for producing hydrogen peroxide and a preparation method therefor are provided. The catalyst for producing hydrogen peroxide according to the embodiments of the present invention comprises a carbon-based support and a catalyst moiety that is bonded to the carbon-based support and comprises an M1-N bonding structure (M1 represents a transition metal atom). The method for preparing a catalyst for producing hydrogen peroxide according to the embodiments of the present invention comprises comprises preparing a carbon-based support, providing a transition metal atom (M1) to the carbon-based support, and doping nitrogen into the carbon-based support.Type: ApplicationFiled: July 21, 2020Publication date: August 25, 2022Inventors: Taeghwan HYEON, Yung-Eun SUNG, Heejong SHIN, Byoung-Hoon LEE, Euiyeon JUNG
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Publication number: 20220140418Abstract: An in-situ X-ray analysis apparatus includes: a potentiostat connected to an in-situ electrochemical cell and configured to control a voltage, current, and time of the in-situ electrochemical cell, or to record voltage, current, resistance, capacity, and time information of the in-situ electrochemical cell; an X-ray analysis apparatus configured to obtain X-ray diffraction information of the in-situ electrochemical cell; and a controller connected to the X-ray analysis apparatus and the potentiostat and configured to provide or receive a signal to or from each of the X-ray analysis apparatus and the potentiostat.Type: ApplicationFiled: November 3, 2021Publication date: May 5, 2022Inventors: Yung-Eun Sung, Jungjin Park, Jae-Hyuk Park, Jong Sig Lee, Chunjoong Kim, Shin-Yeong Kim
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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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Patent number: 10876980Abstract: Provided is an in-situ X-ray analysis apparatus including a potentiostat connected to an in-situ electrochemical cell and configured to adjust voltage, current, and time of the in-situ electrochemical cell or to record information regarding voltage, current, resistance, capacity, and time information of the in-situ electrochemical cell; an X-ray analysis apparatus configured to obtain X-ray diffraction information regarding the in-situ electrochemical cell; and a controller connected to the X-ray analysis apparatus and the potentiostat and configured to provide or receive signals to or from the X-ray analysis apparatus and the potentiostat.Type: GrantFiled: January 31, 2019Date of Patent: December 29, 2020Assignee: THE INDUSTRY & ACADEMIC COOPERATION IN CHUNGNAM NATIONAL UNIVERSITY (IAC)Inventors: Yung-Eun Sung, Jungjin Park, Chunjoong Kim, Jong Sig Lee, Jae-Hyuk Park
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Patent number: 10770718Abstract: A lithium-sulfur secondary battery includes a cathode current collector and a cathode electrode on the cathode current collector. The cathode electrode includes a porous carbon interlayer electrode including a plurality of carbon fibers, metal sulfide catalyst particles dispersed and positioned on the porous carbon interlayer electrode, and sulfur-based active material particles dispersed on the porous carbon interlayer electrode to be attached thereto and including sulfur.Type: GrantFiled: March 6, 2018Date of Patent: September 8, 2020Assignees: Seoul National University R&DB Foundation, Institute For Basic ScienceInventors: Yung-Eun Sung, Chunjoong Kim, Jungjin Park
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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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Publication number: 20190250112Abstract: Provided is an in-situ X-ray analysis apparatus including a potentiostat connected to an in-situ electrochemical cell and configured to adjust voltage, current, and time of the in-situ electrochemical cell or to record information regarding voltage, current, resistance, capacity, and time information of the in-situ electrochemical cell; an X-ray analysis apparatus configured to obtain X-ray diffraction information regarding the in-situ electrochemical cell; and a controller connected to the X-ray analysis apparatus and the potentiostat and configured to provide or receive signals to or from the X-ray analysis apparatus and the potentiostat.Type: ApplicationFiled: January 31, 2019Publication date: August 15, 2019Applicant: The Industry & Academic Cooperation In Chungnam National University (IAC)Inventors: Yung-Eun SUNG, Jungjin PARK, Chunjoong KIM, Jong Sig LEE, Jae-Hyuk PARK
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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: 20180301694Abstract: A lithium-sulfur secondary battery includes a cathode current collector and a cathode electrode on the cathode current collector. The cathode electrode includes a porous carbon interlayer electrode including a plurality of carbon fibers, metal sulfide catalyst particles dispersed and positioned on the porous carbon interlayer electrode, and sulfur-based active material particles dispersed on the porous carbon interlayer electrode to be attached thereto and including sulfur.Type: ApplicationFiled: March 6, 2018Publication date: October 18, 2018Inventors: Yung-Eun Sung, Chunjoong Kim, Jungjin Park
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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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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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Patent number: 9793552Abstract: The present disclosure relates to a PtAu nanoparticle catalyst heat-treated in the presence of carbon monoxide (CO) and a method for preparing same. Since the PtxAuy nanoparticle catalyst heat-treated under CO atmosphere has high Pt surface area and superior oxygen reduction reaction (ORR) activity, a high-efficiency, high-quality fuel cell can be achieved by applying the catalyst to a fuel cell.Type: GrantFiled: February 28, 2014Date of Patent: October 17, 2017Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jong Hyun Jang, Yung-Eun Sung, Hee-young Park, Hyoung-Juhn Kim, Dirk Henkensmeier, Suk Woo Nam, Hyung Chul Ham, Tae-Hoon Lim, Sung Jong Yoo, Eun Ae Cho, Kug-Seung Lee
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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