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1.发明申请公开(公告)号：US20220231303A1
公开(公告)日：2022-07-21
申请号：US17614372
申请日：2020-06-26
Inventor： Jun Young KIM , Nak-Won KONG , Kah-Young SONG , Hee-Tak KIM , Dong Wook LEE
IPC: H01M4/86 , H01M4/92 , H01M8/1004
Abstract: Disclosed are a fuel cell catalyst of which only a portion, which has relatively low catalytic activity and in which the greatest amount of platinum elution occurs and platinum oxide is easily formed, is selectively coated with a protective layer, and thus degradation due to the long-term operation of a fuel cell can be effectively prevented while also minimizing a deterioration in catalytic activity; a manufacturing method therefor; and a membrane-electrode assembly including same. The fuel cell catalyst of the present invention comprises: a nanoparticle containing platinum; and a protective layer which is selectively coated on only a portion of the surface of the nanoparticle and can suppress the oxidation of the platinum through electronic interaction with the nanoparticle.
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2.发明申请公开(公告)号：US20200243919A1
公开(公告)日：2020-07-30
申请号：US16756683
申请日：2019-05-10
Inventor： Jong-Keon YOON , Kyung-Hwa WOO , Hyun-Jun CHOI , Hye-Jin LEE , Hoe-Jin HAH , Hee-Tak KIM , Young-Il ROH , Hyun-Soo JIN
IPC: H01M10/42 , H01M10/052 , H01M4/137 , H01M10/0565 , H01M2/16
Abstract: A lithium metal secondary battery including: an electrode assembly including a positive electrode, a lithium metal negative electrode, a separator interposed between the positive electrode and the lithium metal negative electrode, a protective layer interposed between the lithium metal negative electrode and the separator; and a non-aqueous electrolyte injected to the electrode assembly, wherein the protective layer includes a polymer having a sulfur chain group. A battery module including the lithium metal secondary battery is also disclosed.
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公开(公告)号：US20230145094A1
公开(公告)日：2023-05-11
申请号：US17912567
申请日：2021-07-20
Inventor： Jong Keon YOON , Sunwoo HWANG , Hoejin HAH , Jung Pil LEE , Ju-Hyuk LEE , Hee-Tak KIM , Hyeokjin KWON
IPC: H01M4/587 , H01M10/052 , H01M4/62 , H01M50/534
CPC classification number: H01M4/587 , H01M10/052 , H01M4/622 , H01M50/534 , H01M2004/027
Abstract: The present disclosure relates to a negative electrode for a lithium secondary battery that enables the provision of a lithium secondary battery having a higher energy density and can fundamentally prevent the electrolyte decomposition reaction and the lithium dendrite formation, a method for manufacturing the same and a lithium secondary battery including the same.
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公开(公告)号：US20210066719A1
公开(公告)日：2021-03-04
申请号：US16842597
申请日：2020-04-07
Inventor： Hee-Tak KIM , Sang Ouk KIM , Juhyuk LEE , Year in BYUN
Abstract: Provided are a positive electrode for a Zn—Br battery, a Zn—Br battery including the same, and a method of manufacturing the positive electrode for a Zn—Br battery. The positive electrode for a Zn—Br battery includes a carbon body doped with pyridinic nitrogen. The Zn—Br battery includes a negative electrode including a transition metal coated with zinc, the positive electrode; and an electrolyte. A pH of the electrolyte is in a range of 1.5 to 5.
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Patent Agency Ranking
5.发明申请公开(公告)号：US20220209271A1
公开(公告)日：2022-06-30
申请号：US17607408
申请日：2020-05-08
Inventor： Hee-Tak KIM , Seongmin YUK , Dong Wook LEE , Kah-Young SONG , Jun Young KIM
IPC: H01M8/1051 , H01M8/1004 , H01M4/86
Abstract: Disclosed are a radical scavenger, a method for preparing same, and a membrane-electrode assembly containing same, wherein the radical scavenger can maintain the performance of a fuel cell for a long time and enhance the lifespan thereof since the elution of metal ions derived from radical scavenging particles during fuel cell operation can be continuously prevented for a long time. The radical scavenger of the present invention comprises: radical scavenging particles; and a porous protective film on the surface of the radical scavenging particles, wherein the porous protective film comprises at least one material of high oxidative stability selected from the group consisting of silica, carbon nitride, heteroatom-doped graphene, a porphyrin-based compound, a phenazine-based compound, and derivatives thereof.
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公开(公告)号：US20210344006A1
公开(公告)日：2021-11-04
申请号：US17271659
申请日：2019-07-16
Inventor： Jong Keon YOON , Yunjung KIM , Hyunwoong YUN , Sunwoo HWANG , Hoejin HAH , Hee-Tak KIM , Youngil ROH
IPC: H01M4/38 , H01M4/04 , H01M4/36 , H01M4/66 , H01M10/0525 , H01M50/449 , H01M4/58
Abstract: A lithium metal negative electrode and a lithium metal battery including the lithium metal negative electrode. The lithium metal negative electrode includes a protective layer present on at least one surface of the negative electrode for stabilizing between the lithium metal and the electrolyte. The protective layer includes a polymer of alpha lipoic acid (ALA) and sulfur molecule (S8), a depolymerized product of the polymer, an inorganic sulfide-based compound, and at least one of an inorganic nitride-based compound, or an inorganic nitrate-based compound.
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公开(公告)号：US20210288303A1
公开(公告)日：2021-09-16
申请号：US17133819
申请日：2020-12-24
Inventor： Hee-Tak KIM , Juhyuk LEE
IPC: H01M4/04 , H01M10/054 , H01M4/583 , H01M4/133 , H01M4/1393
Abstract: Disclosed are an electrode for secondary batteries containing a high-density carbon defect structure and a method of producing the same. The electrode can prevent deterioration of battery performance due to dendrite formation by inhibiting self-diffusion and aggregation of metal nuclei, and can exhibit an unprecedentedly high number of charge/discharge cycles and excellent energy efficiency by uniformly electrodepositing metal ions on the surface of the electrode. When the method of producing a carbon electrode for a secondary battery is used, an electrode containing a high-density carbon defect structure can be produced, and thus a battery with higher efficiency and a longer lifespan can be produced. The secondary battery comprising the electrode is useful for fields related to medium/large-scale energy storage technology, in particular, for mobile devices, automobile batteries, and renewable-energy power generation systems.
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公开(公告)号：US20210249675A1
公开(公告)日：2021-08-12
申请号：US17173559
申请日：2021-02-11
Inventor： Hee-Tak KIM , Jonghyun HYUN
IPC: H01M8/1041 , H01M8/103 , H01M8/1081 , H01M8/1086 , H01F1/00
Abstract: Provided is an ion-conducting layer including: an ion conductive matrix; and a 1D composite dispersed in the ion conductive matrix and oriented in a membrane thickness direction, in which the 1D composite includes a core of a non-conductive 1D nanostructure; an intermediate layer enclosing the core and having magnetic nanoparticles bonded to a surface thereof; and a surface layer conducting the same kind of ions as ions in the matrix.
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9.发明申请公开(公告)号：US20200280074A1
公开(公告)日：2020-09-03
申请号：US16647545
申请日：2018-09-28
Inventor： Jun-Young KIM , Moo-Seok LEE , Hee-Tak KIM , Seongmin YUK , Dong-Hyun LEE
IPC: H01M4/86 , H01M8/1004 , H01M8/1018
Abstract: A radical scavenger, a manufacturing method therefor, a membrane-electrode assembly including the radical scavenger, and a fuel cell including the membrane-electrode assembly are disclosed. The membrane-electrode assembly contains an ion exchange membrane; catalyst electrodes disposed on both surfaces of the ion exchange membrane, respectively; and a radical scavenger disposed at any one position selected from the group consisting of in the catalyst electrodes, in the ion exchange membrane, between the ion exchange membrane and the catalyst electrodes, and a combination thereof.
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