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公开(公告)号：US11616234B2
公开(公告)日：2023-03-28
申请号：US16760778
申请日：2018-11-02
Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE
Inventor： Jeong Hee Choi , Sang Min Lee , Min Ho Lee , Cheol Ho Lee , Jong Wook Bae
IPC: H01M4/62 , H01M4/04 , H01M4/139 , H01M10/0525 , H01M4/02
Abstract: Disclosed is a rapidly rechargeable lithium secondary battery. The present invention provides a negative electrode for a lithium secondary battery, the negative electrode being characterized by including: a current collector; a negative electrode material layer which is formed on the current collector and includes negative electrode active material particles, conductive material particles, and a binder; and a surface layer which is formed on the surface of the negative electrode material layer, is formed of insulating particles that are inert with respect to lithium, and partially shields the negative electrode material layer. According to the present invention, a negative electrode for a lithium secondary battery having a high charging speed without lifetime degradation can be provided.
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公开(公告)号：US20230053799A1
公开(公告)日：2023-02-23
申请号：US18046442
申请日：2022-10-13
Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE
Inventor： Seung Kwon SEOL , Won Suk CHANG
Abstract: Carbon nanotube (CNT) ink includes a CNT, a rheological modifier for controlling a flow of the CNT, and a solvent. The CNT ink exhibits a liquid-like behavior under shear stress of 10−1 to 10 Pa. A loss modulus of the CNT ink may have a larger value than that of storage modulus under shear stress of 10−1 to 10 Pa. A content of the CNT may be 1 to 20 wt %. A content of the rheological modifier in the CNT ink may be 5 to 40 wt %. A weight ratio of the content of the CNT and the content of the rheological modifier in the CNT ink may be 1:1 to 1:5. The solvent may have a boiling point of 100° C. or less.
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公开(公告)号：US11522196B2
公开(公告)日：2022-12-06
申请号：US16763946
申请日：2018-11-14
Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE , UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
Inventor： Sang Min Lee , Min Sik Park , Gum Jae Park , Ha Young Lim , Jeong Hee Choi
Abstract: The present invention relates to an anode active material, a nonaqueous lithium secondary battery comprising the same, and a preparation method therefor, and the purpose of the present invention is to improve high-rate charging characteristics without deterioration of charging and discharging efficiency and lifetime characteristics when applying an amorphous carbon coating layer as the anode active material of the nonaqueous lithium secondary battery, wherein the amorphous carbon coating layer comprising MoPx particles composed of MoP and MoP2 is formed on the surface of a carbon-based material, thereby reducing resistance when intercalating lithium ions into the surface of the carbon-based material, and improving reactivity and structural stability of the surface. The anode active material according to the present invention comprises a carbon-based material, and an amorphous carbon coating layer comprising MoPx particles composed of MoP and MoP2 formed on the surface of the carbon-based material.
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公开(公告)号：US20220336602A1
公开(公告)日：2022-10-20
申请号：US17641427
申请日：2020-08-31
Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE
Inventor： Jeong Hyun MOON , In-Ho KANG , Sang Cheol KIM , Hyoung Woo KIM , Moonkyong NA , Wook BAHNG , Ogyun SEOK
IPC: H01L29/423 , H01L29/16 , H01L29/10 , H01L29/66 , H01L21/322
Abstract: The present invention relates to a trench-gate SiC MOSFET device and a manufacturing method therefor. The trench-gate SiC MOSFET device of the present invention comprises: a gate oxide film covering a gate trench formed in a SiC substrate (e.g., an n-type 4H-SiC substrate); a doped well (e.g., BPW) formed in a bottom region of the gate trench; a gate electrode formed in the gate trench covered by the gate oxide film; an interlayer insulating film formed on the gate electrode; a source electrode covering the top surface of a doping layer for a source area formed on the entire surface of an epitaxial layer of the substrate and the top surface of the interlayer insulating film; and a drain electrode formed on the rear surface of the substrate.
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公开(公告)号：US11437169B2
公开(公告)日：2022-09-06
申请号：US15757707
申请日：2016-09-06
Applicant: Korea Electrotechnology Research Institute
Inventor： Rock Kil Ko , Dong Woo Ha , Seog Whan Kim , Young Sik Jo
Abstract: The present invention relates to a stacking structure of a superconducting wire. The present invention provides a superconducting wire in which a metal substrate, a buffer layer, a superconducting layer, and a stabilizing layer are stacked, the superconducting wire including: a plurality of wedges which penetrates through the superconducting layer and the buffer layer to connect the stabilizing layer and the metal substrate. According to the present invention, it is possible to provide the superconducting wire of which mechanical strength is improved to have high resistance against to deterioration or delamination. Further, the present invention may provide the superconducting wire which is self-protectable against a quench phenomenon. Further, the present invention may provide the superconducting wire which is suitable for application of a high magnetic field.
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Patent Agency Ranking
公开(公告)号：US20220216462A1
公开(公告)日：2022-07-07
申请号：US17595157
申请日：2020-05-13
Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE , UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
Inventor： Sang Min LEE , Min-Sik PARK , Chul Ho LEE , Jeong Hee CHOI
Abstract: The present invention provides a method for preparing an anode active material for a nonaqueous lithium secondary battery, comprising the steps of: preparing a carbon-based material; forming a precursor coating layer comprising Me and A (wherein A is O or S) on the surface of the carbon-based material; supplying a P precursor to the precursor coating layer of the carbon-based material; and converting at least a part of the precursor coating layer into a compound represented by Mex1Py1 (wherein x1>0 and y1>0) by the reaction of the precursor coating layer and the P precursor, thereby forming a phosphide coating layer, wherein Me is at least one type of the same metal element selected from among Mo, Ni, Fe, Co, Ti, V, Cr, Nb and Mn.
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公开(公告)号：US11121265B2
公开(公告)日：2021-09-14
申请号：US16655477
申请日：2019-10-17
Applicant: Korea Electrotechnology Research Institute
Inventor： O Gyun Seok , In Ho Kang , Sang Cheol Kim , Hyoung Woo Kim , Moon Kyong Na , Jeong Hyun Moon , Wook Bang
IPC: H01L29/872 , H01L29/16 , H01L29/47 , H01L21/04 , H01L29/66
Abstract: The present invention relates to a silicon carbide trench Schottky barrier diode using polysilicon and a method of manufacturing same. The diode has a low turn-on voltage and an improved reverse characteristic. The method includes sequentially forming an epitaxial layer, a polysilicon layer, an oxide film, and a photoresist film on a silicon carbide substrate, patterning the photoresist to form a photoresist pattern, etching the oxide film using the photoresist pattern as an etching mask to form an oxide film pattern, etching the polysilicon layer using the oxide film pattern as an etching mask to form a polysilicon pattern, removing the photoresist pattern, forming an epitaxial pattern by etching the epitaxial layer down to a predetermined depth using the oxide film pattern as an etching mask, and removing the oxide film pattern to produce a trench.
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公开(公告)号：US20200212773A1
公开(公告)日：2020-07-02
申请号：US16349574
申请日：2017-12-21
Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE
Inventor： Shi Uk CHUNG , Jong Moo KIM
Abstract: The present invention relates to a permanent magnet electrical machine, and more particularly, to a permanent magnet electrical machine for reducing a detent force, the machine being capable of reducing a detent force by arranging a plurality of movers having the same teeth at predetermined intervals. In addition, according to the present invention, the permanent magnet electrical machine comprising a stator and a plurality of movers configured to perform linear motion, curvilinear motion, or rotary motion with respect to the stator is provided.
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公开(公告)号：US10294378B2
公开(公告)日：2019-05-21
申请号：US14082328
申请日：2013-11-18
Applicant: Korea Electrotechnology Research Institute
Inventor： Dong-jun Kang , Hoy-yul Park , Myeong-sang Ahn
IPC: C09D183/04 , C09D7/62 , C01B33/145 , C01B33/146 , C08G77/02 , C08K5/5419
Abstract: Disclosed herein is a method of manufacturing a hybrid packaging material, comprising the steps of: (a) forming a colloidal inorganic nanosol; (b) surface-treating the inorganic nanosol of step (a) with an organic metal alkoxide containing an organic function group by stirring the inorganic nanosol together with the organic metal alkoxide; (c) replacing a solvent of the inorganic nanosol with an organic solvent different in type from the solvent to prepare an organic solvent-type inorganic nanosol; (d) substituting the organic solvent of the inorganic nanosol of step (c) with a functional organic monomer or a silicon compound, followed by concentration to prepare a solvent-free organic-inorganic hybrid material; and (e) adding a nanoclay dispersed in a solvent to the solvent-free organic-inorganic hybrid material.
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公开(公告)号：US20190094005A1
公开(公告)日：2019-03-28
申请号：US16202399
申请日：2018-11-28
Applicant: Korea Electrotechnology Research Institute
Inventor： Joong Tark Han , Geon Woong Lee , Seon Hee Seo , Jeong In Jang , Seung Yol Jeong , Hee Jin Jeong
IPC: G01B7/16 , C08K3/04 , C08K3/08 , C08K7/00 , C01B32/168 , C01B32/194 , C08J3/21 , D01F1/09 , D01F8/10 , D01F8/18 , D01F9/12 , D01F8/16 , H01B1/22 , H01B1/24
Abstract: A conductive fiber including a metal-nanobelt-carbon-nanomaterial composite. A manufacturing method thereof includes preparing a composite including a carbon nanomaterial and metal nanobelts and manufacturing a conductive fiber by mixing the composite with a polymer. A fibrous strain sensor and a manufacturing method thereof are also provided. Thereby, a conductive fiber including a metal-nanobelt-carbon-nanomaterial composite, which is able to increase conductivity of the conductive fiber through synthesis of metal nanobelts enabling area contact and to exhibit good contact between the carbon nanomaterial and the metal nanobelts due to formation of the metal nanobelts on the surface of the carbon nanomaterial and superior dispersion uniformity, and a fibrous strain sensor including the conductive fiber can be obtained. The conductive fiber can be effectively applied to a strain sensor based on a principle by which resistance drastically increases with an increase in a distance between metal nanobelts aligned in a fiber direction upon tensile strain of metal nanobelts enabling area contact.
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