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公开(公告)号：US12227858B2
公开(公告)日：2025-02-18
申请号：US17589466
申请日：2022-01-31
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Hyoung-Juhn Kim , Taekyung Lee , So Young Lee , Hee-Young Park , Bora Seo , Hyun Seo Park , Jong Hyun Jang , Tae Hoon Lim
Abstract: The present disclosure relates to a polybenzimidazole-based electrolyte membrane for alkaline water electrolysis, which includes a polybenzimidazole-based polymer, wherein the polybenzimidazole-based polymer is a biaxially oriented film. The polybenzimidazole-based electrolyte membrane for alkaline water electrolysis can reduce the concentration of an alkaline solution by improving the crystallinity of a polybenzimidazole-based polymer to increase the resistance against base, significantly improving the long-term stability of alkaline water electrolysis using a polybenzimidazole-based electrolyte membrane through the improved resistance against base, and by increasing the operation temperature to enhance the catalyst activity.
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公开(公告)号：US11670791B2
公开(公告)日：2023-06-06
申请号：US17097658
申请日：2020-11-13
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Hyoung-Juhn Kim , Jieun Choi , So Young Lee , Hee-Young Park , Sung Jong Yoo , Hyun Seo Park , Jing Young Kim , Jong Hyun Jang , Bora Seo
IPC: H01M8/1032 , C08G65/40 , H01M8/1027 , H01M8/1004 , H01M8/10
CPC classification number: H01M8/1032 , C08G65/40 , H01M8/1004 , H01M8/1027 , H01M2008/1095 , H01M2300/0082
Abstract: The present disclosure relates to a polyarylene ether-based polymer for an electrolyte membrane of a fuel cell, represented by the following Chemical Formula 1. When the polyarylene ether-based polymer for an electrolyte membrane of a fuel cell is applied to the manufacture of a membrane-electrode assembly through a decal process, the hot pressing temperature may be controlled to about 120° C. so as to conform to a low glass transition temperature. Therefore, it is possible to solve the problems of deterioration of an electrolyte membrane or incomplete transfer of an electrode catalyst layer, caused by the high hot pressing temperature applied in the case of the conventional hydrocarbon-based polymer material.
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公开(公告)号：US11289711B2
公开(公告)日：2022-03-29
申请号：US16934893
申请日：2020-07-21
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Jong Hyun Jang , Hyun Seo Park , Hee-Young Park , Katie Heeyum Lim , Oh Sub Kim , Hyoung-Juhn Kim , Jin Young Kim , Sung Jong Yoo , Dirk Henkensmeir , So Young Lee
Abstract: Disclosed are a catalyst electrode for a fuel cell, a method for fabricating the catalyst electrode, and a fuel cell including the catalyst electrode. The presence of an ionomer-ionomer support composite in the catalyst electrode prevents the porous structure of the catalyst electrode from collapsing due to oxidation of a carbon support to avoid an increase in resistance to gas diffusion and can stably secure proton channels. The presence of carbon materials with high conductivity is effective in preventing the electrical conductivity of the electrode from deterioration resulting from the use of a metal oxide in the ionomer-ionomer support composite and is also effective in suppressing collapse of the porous structure of the electrode to prevent an increase in resistance to gas diffusion in the electrode. Based on these effects, the fuel cell exhibits excellent performance characteristics and prevents its performance from deteriorating during continuous operation.
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公开(公告)号：US11173481B2
公开(公告)日：2021-11-16
申请号：US16534216
申请日：2019-08-07
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY , GLOBAL FRONTIER CENTER FOR MULTISCALE ENERGY SYSTEMS
Inventor： Sung Jong Yoo , Injoon Jang , Hee-Young Park , So Young Lee , Hyun Seo Park , Jin Young Kim , Jong Hyun Jang , Hyoung-Juhn Kim
Abstract: Disclosed are a metal single-atom catalyst and a method for preparing the same. The method uses a minimal amount of chemicals and is thus environmentally friendly compared to conventional chemical and/or physical methods. In addition, the method enables the preparation of a single-atom catalyst in a simple and economical manner without the need for further treatment such as acid treatment or heat treatment. Furthermore, the method is universally applicable to the preparation of single-atom catalysts irrespective of the kinds of metals and supports, unlike conventional methods that suffer from very limited choices of metal materials and supports. Therefore, the method can be widely utilized to prepare various types of metal single-atom catalysts. All metal atoms in the metal single-atom catalyst can participate in catalytic reactions. This optimal atom utilization achieves maximum reactivity per unit mass and can minimize the amount of the metal used, which is very economical.
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公开(公告)号：US10854886B2
公开(公告)日：2020-12-01
申请号：US16268856
申请日：2019-02-06
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Jong Hyun Jang , Hee-Young Park , Jea-woo Jung , Hyoung-Juhn Kim , Dirk Henkensmeier , Sung Jong Yoo , Jin Young Kim , So Young Lee , Hyun Seo Park
IPC: H01M4/92
Abstract: A method for preparing a carbon-supported, platinum-cobalt alloy, nanoparticle catalyst includes mixing a solution containing, in combination, a platinum precursor, a transition metal precursor consisting of a transition metal that is cobalt, carbon, a stabilizer that is oleyl amine, and a reducing agent that is sodium borohydride to provide carbon-supported, platinum-cobalt alloy nanoparticles, and washing the carbon-supported, platinum-cobalt alloy, nanoparticles using ethanol and distilled water individually or in combination followed by drying at room temperature to obtain dried carbon-supported, platinum-cobalt alloy, nanoparticles; treating the dried carbon-supported, platinum-cobalt alloy, nanoparticles with an acetic acid solution having a concentration ranging from 1-16M to provide acetic acid-treated nanoparticles, and washing the acetic acid-treated nanoparticles using distilled water followed by drying at room temperature to obtain dried acetic acid-treated nanoparticles; and heat treating the dried acetic acid-treated nanoparticles at a temperature ranging from 600 to 1000° C. under a hydrogen-containing atmosphere.
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Patent Agency Ranking
公开(公告)号：US20200086302A1
公开(公告)日：2020-03-19
申请号：US16216287
申请日：2018-12-11
Applicant: Korea Institute of Science and Technology
Inventor： Hyun Seo Park , Kahyun Hur , Min-Soek Kim , Jimin Kong , Jong Hyun Jang , Chang Won Yoon , Hyung Chul Ham , Suk Woo Nam , Jonghee Han , Ara Jo
Abstract: The present disclosure relates to a catalyst for electrochemical ammonia synthesis and a method for producing the same. The catalyst has an ammonia synthesis activity up to several times to several tens of times of the activity of the existing single metal or metal oxide catalysts. Thus, when using the catalyst, it is possible to provide a method for electrochemical ammonia synthesis having an improved ammonia production yield and rate.
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公开(公告)号：US10435296B2
公开(公告)日：2019-10-08
申请号：US15713698
申请日：2017-09-25
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Chang Won Yoon , Dajung Han , Yeong Cheon Kim , Hyun Seo Park , Hyung Chul Ham , Sung Pil Yoon , Jonghee Han , Tae Hoon Lim , Suk Woo Nam
IPC: C01B3/00 , C01B3/54 , C07C15/16 , B01J23/44 , B01J23/46 , C07C15/14 , C07C5/42 , B01J35/00 , B01J21/04 , B01J27/26 , C01B3/22
Abstract: Provided is a liquid hydrogen storage material including 1,1′-biphenyl and 1,1′-methylenedibenzene, the liquid hydrogen storage material including the corresponding 1,1′-biphenyl and 1,1′-methylenedibenzene at a weight ratio of 1:1 to 1:2.5. The corresponding liquid hydrogen storage material has excellent hydrogen storage capacity value by including materials having high hydrogen storage capacity, and is supplied in a liquid state, and as a result, it is possible to minimize initial investment costs and the like required when the corresponding liquid hydrogen storage material is used as a hydrogen storage material in a variety of industries.
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公开(公告)号：US10396383B2
公开(公告)日：2019-08-27
申请号：US15679562
申请日：2017-08-17
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Hyoung-Juhn Kim , So Young Lee , Jieon Chae , Jong Hyun Jang , Sung Jong Yoo , Jin Young Kim , Hyun Seo Park , Dirk Henkensmeier
IPC: H01M8/1004 , H01M8/1016 , H01M8/04089 , H01M8/04291
Abstract: A membrane electrode assembly includes a cation exchange membrane electrode assembly and an anion exchange membrane electrode assembly. The cation exchange membrane includes a cation exchange membrane, a first cathode electrode disposed on the cation exchange membrane, and a first anode electrode disposed under the cation exchange membrane. The anion exchange membrane electrode assembly includes an anion exchange membrane, a second cathode electrode disposed on the anion exchange membrane, and a second anode electrode disposed under the anion exchange membrane. The cation exchange membrane and the anion exchange membrane partially contact each other, and the first cathode electrode, the first anode electrode, the second cathode electrode, and the second anode electrode do not contact one another.
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公开(公告)号：US10367206B2
公开(公告)日：2019-07-30
申请号：US15910290
申请日：2018-03-02
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Sung Jong Yoo , Dong Wook Lee , So Young Lee , Jin Young Kim , Jong Hyun Jang , Hyoung-Juhn Kim , Hyun Seo Park , Gil-Pyo Kim
IPC: H01M4/90 , H01M8/1018 , H01M4/92
Abstract: A method for preparing a metal catalyst supported on a porous carbon support using a plant, including: (a) a step of preparing a plant; (b) a step of preparing a metal precursor-absorbed plant by absorbing a metal precursor into the plant; (c) a step of preparing a catalyst precursor by drying the metal precursor-absorbed plant; (d) a step of preparing a char by charring the catalyst precursor; and (e) a step of preparing a metal catalyst supported on a porous carbon support by treating the char with an acid. The method for preparing a metal catalyst supported on a porous carbon support of the present disclosure, whereby a plant itself is charred, is environment-friendly and allows for convenient large-scale synthesis. The metal catalyst supported on a porous carbon support prepared thereby can be used as electrode materials of various energy devices, particularly as an electrode catalyst of a fuel cell.
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公开(公告)号：US20190161872A1
公开(公告)日：2019-05-30
申请号：US15846893
申请日：2017-12-19
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Jong Hyuk PARK , Hyun Seo Park , Jimin Kong
CPC classification number: C25B11/0473 , C25B1/00 , C25B11/02 , C25B11/0405 , C25B11/0447 , C30B23/025 , C30B29/02 , C30B33/02
Abstract: An electrochemical method for ammonia synthesis including the steps of: preparing a single-crystalline metal thin film; and synthesizing ammonia by using the single-crystalline metal thin film electrode. More particularly, it relates to improvement of the production yield and synthesis rate of ammonia trough the method for preparing ammonia by using an electrochemical reactor which includes a cathode including a single-crystalline metal thin film on the surface thereof, an anode and an electrolyte, wherein the method includes the steps of: supplying nitrogen to the cathode; supplying aqueous electrolyte solution to the anode; and applying an electric voltage between the cathode and the anode.
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