公开(公告)号：US10669640B2

公开(公告)日：2020-06-02

申请号：US15241798

申请日：2016-08-19

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jong Hyun Jang ,  Soo-Kil Kim ,  Sang Hyun Ahn ,  Hyoung-Juhn Kim ,  Jin Young Kim ,  Sung Jong Yoo ,  Dirk Henkensmeier ,  Jonghee Han ,  Jaeyune Ryu

IPC: C25B11/04 ,  C25B9/10 ,  C25B1/10 ,  C25D3/12 ,  C25D5/54 ,  C23C18/54

Abstract: Provided is an electrocatalyst for anion exchange membrane water electrolysis, including a carbonaceous material, and nickel electrodeposited on the carbonaceous material, wherein nickel is partially substituted with platinum and the substitution with platinum provides increased hydrogen evolution activity as compared to the same electrocatalyst before substitution with platinum. Also provided are a method for preparing the electrocatalyst and an anion exchange membrane water electrolyzer using the same. The nickel electrocatalyst coated with an ultralow loading amount of platinum for anion exchange membrane water electrolysis shows excellent hydrogen evolution activity and has a small thickness of catalyst, thereby providing high mass transfer and high catalyst availability. In addition, the electrocatalyst uses a particle-type electrode to facilitate emission of hydrogen bubbles generated during hydrogen evolution reaction and oxygen bubbles generated during oxygen evolution reaction, and requires low cost for preparation to provide high cost-efficiency.

公开(公告)号：US10601052B2

公开(公告)日：2020-03-24

申请号：US15360034

申请日：2016-11-23

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jong Hyun Jang ,  Byungseok Lee ,  Hee-Young Park ,  Hyoung-Juhn Kim ,  Dirk Henkensmeier ,  Sung Jong Yoo ,  Jin Young Kim ,  So Young Lee ,  Jaeyune Ryu ,  Sung Pil Yoon ,  Jonghee Han ,  Suk Woo Nam

IPC: H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/18

Abstract: Disclosed are a reversible fuel cell oxygen electrode in which IrO2 is electrodeposited and formed on a porous carbon material and platinum is applied thereon to form a porous platinum layer, a reversible fuel cell including the same, and a method for preparing the same. According to the corresponding reversible fuel cell oxygen electrode, as the loading amounts of IrO2 and platinum used in the reversible fuel cell oxygen electrode can be lowered, it is possible to exhibit excellent reversible fuel cell performances (excellent fuel cell performance and water electrolysis performance) by improving the mass transport of water and oxygen while being capable of reducing the loading amounts of IrO2 and platinum. Further, it is possible to exhibit a good activity of a catalyst when the present disclosure is applied to a reversible fuel cell oxygen electrode and to reduce corrosion of carbon.

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.

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.

公开(公告)号：US20180202970A1

公开(公告)日：2018-07-19

申请号：US15861998

申请日：2018-01-04

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： So Young LEE ,  Hyoung-Juhn Kim ,  Young Seung Na ,  Jin Young Kim ,  Sung Jong Yoo ,  Jong Hyun Jang ,  Jonghee Han ,  Suk Woo Nam

IPC: G01N27/62 ,  G01R27/26 ,  G01K13/00

Abstract: An ionic conductivity measurement device of an electrolytic membrane includes a humidification chamber configured to accommodate an ion-conductive electrolytic membrane and having concave grooves respectively formed at both sides thereof which face the electrolytic membrane to form a measurement space for measuring ionic conductivity of the electrolytic membrane; a plurality of channels formed at a bottom surface of each of the concave grooves; a gas distribution unit detachably coupled to each of the concave grooves with the electrolytic membrane being interposed therebetween; and a plurality of electrodes provided in contact with one side of the electrolytic membrane and supported by the gas distribution unit, the plurality of electrodes being disposed side by side to measure an impedance of the electrolytic membrane.

公开(公告)号：US09751078B2

公开(公告)日：2017-09-05

申请号：US14921567

申请日：2015-10-23

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Sung Jong Yoo ,  Jaeyune Ryu ,  Jong Hyun Jang ,  Jin Young Kim ,  Hyoung-Juhn Kim ,  Sung Pil Yoon ,  Jonghee Han ,  Suk Woo Nam ,  Tae Hoon Lim

IPC: B01J27/185 ,  B01J35/06 ,  C25B11/03 ,  C25B11/04 ,  C25B1/02 ,  B82Y30/00

CPC classification number: B01J27/1853 ,  B01J23/75 ,  B01J35/06 ,  B82Y30/00 ,  C25B1/02 ,  C25B11/035 ,  C25B11/0405 ,  C25B11/0415 ,  C25B11/0447

Abstract: Disclosed is a non-precious metal based water electrolysis catalyst represented by CoX/C (X is at least one selected from the group consisting of P, O, B, S and N) for evolution of hydrogen and oxygen at a cathode and anode, respectively, at the same time, the catalyst including a cobalt-containing compound fixed to a carbon carrier.

公开(公告)号：US11936052B2

公开(公告)日：2024-03-19

申请号：US16850750

申请日：2020-04-16

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jin Young Kim ,  Jong Min Kim ,  Hee-Young Park ,  So Young Lee ,  Hyun Seo Park ,  Sung Jong Yoo ,  Jong Hyun Jang ,  Hyoung-Juhn Kim ,  Chang Won Yoon ,  Jonghee Han

IPC: H01M4/92 ,  C01G19/02 ,  D01D5/00 ,  D01F9/08 ,  H01M4/86

CPC classification number: H01M4/925 ,  C01G19/02 ,  D01F9/08 ,  H01M4/8673 ,  C01P2002/54 ,  C01P2004/13 ,  D01D5/0007

Abstract: Provided is a fluorine-doped tin oxide support, a platinum catalyst for a fuel cell having the same, and a method for producing the same. Also described is a high electrical conductivity and electrochemical durability by doping fluorine to the tin oxide-based support through an electrospinning process. Thus, while resolving a degradation issue of the carbon support in the conventional commercially available platinum/carbon (Pt/C) catalyst, what is designed is to minimize an electrochemical elution of dopant or tin, which is a limitation of the tin oxide support itself and has excellent performance as a catalyst for a fuel cell.

公开(公告)号：US11799093B2

公开(公告)日：2023-10-24

申请号：US17677723

申请日：2022-02-22

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

IPC: H01M4/92 ,  H01M4/86 ,  H01M4/88 ,  H01M4/90

CPC classification number: H01M4/926 ,  H01M4/8652 ,  H01M4/8828 ,  H01M4/8892 ,  H01M4/9016

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.

公开(公告)号：US11649551B2

公开(公告)日：2023-05-16

申请号：US17038331

申请日：2020-09-30

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： So Young Lee ,  Hyoung-Juhn Kim ,  Sae Yane Baek ,  Taekyung Lee ,  Sung Jong Yoo ,  Jong Hyun Jang ,  Hee-Young Park ,  Jin Young Kim ,  Hyun S. Park

IPC: C25B9/23 ,  C25B13/02 ,  C25B13/08 ,  B01D67/00 ,  B01D71/06 ,  C25B11/04 ,  C25B1/04 ,  C25B9/73

CPC classification number: C25B9/23 ,  B01D67/0011 ,  B01D67/0013 ,  B01D71/06 ,  C25B1/04 ,  C25B9/73 ,  C25B11/04 ,  C25B13/02 ,  C25B13/08 ,  B01D2325/023 ,  B01D2325/42

Abstract: The present disclosure discloses an asymmetric electrolyte membrane, a membrane electrode assembly including the same, a water electrolysis apparatus including the same and a method for manufacturing the same. More particularly, it discloses an asymmetric electrolyte membrane having a porous layer and a dense layer at the same time, a membrane electrode assembly including the same, a water electrolysis apparatus including the same and a method for manufacturing the same.

公开(公告)号：US11326264B2

公开(公告)日：2022-05-10

申请号：US16122640

申请日：2018-09-05

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jong Hyun Jang ,  Seunghoe Choe ,  Youngseung Na ,  Hye Jin Lee ,  Hyoung-Juhn Kim ,  Dirk Henkensmeier ,  Sung Jong Yoo ,  Jin Young Kim ,  So Young Lee ,  Hyun Seo Park

IPC: C25B11/051 ,  C25B1/04 ,  C25B9/19 ,  C25B9/23 ,  C25B9/73 ,  C25B11/069

Abstract: Provided is a membrane electrode assembly for a proton exchange membrane water electrolyzer, including: an oxygen electrode including an iridium oxide (IrO2) layer which is an electrodeposited oxygen electrode catalyst layer on a titanium (Ti) layer which is a diffusion layer; a hydrogen electrode in which a hydrogen electrode catalyst layer is formed on a diffusion layer; and an electrolyte membrane placed between the oxygen electrode catalyst layer and the hydrogen electrode catalyst layer, in which a portion of the pores of the Ti diffusion layer are filled with an electrolyte of the electrolyte membrane.