Patents by Inventor Kunchan Lee
Kunchan Lee 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: 20240088431Abstract: Provided is a novel solid electrolyte having excellent lithium ion conductivity. The lithium ion conductive solid electrolyte of the present invention includes a chalcogenide having a monoclinic crystal structure, wherein the monoclinic crystal has an a-axis length of 9.690 to 9.711 ?, a b-axis length of 11.520 to 11.531 ?, a c-axis length of 10.680 to 10.695 ?, and an axis angle ? in the range of 90.01 to 90.08°. The all-solid-state battery of the present invention includes a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, and a solid electrolyte layer between the positive electrode and the negative electrode, wherein the solid electrolyte layer includes the lithium ion conductive solid electrolyte.Type: ApplicationFiled: December 23, 2021Publication date: March 14, 2024Applicant: Resonac CorporationInventors: Kunchan LEE, Ryosuke SEI
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Publication number: 20240066502Abstract: To provide a means removing chlorine gas, which can remove chlorine gas contained in, for example, exhaust gas with high efficiency and does not require frequent exchange. A chlorine gas decomposition catalyst including a metal oxide (X), wherein the metal oxide (X) includes an oxide (X1) of at least one element selected from the group consisting of Ce and Co.Type: ApplicationFiled: December 23, 2021Publication date: February 29, 2024Applicant: Resonac CorporationInventors: Kunchan LEE, Kazuki IWAGAKI, Toshinori MORIYA, Hitoshi ATOBE
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Publication number: 20230307696Abstract: A solid electrolyte material, a solid electrolyte, a method for producing these, and an all-solid-state battery. The solid electrolyte material includes a lithium ion conductive compound (a) including lithium, tantalum, phosphorus, and oxygen as constituent elements, and at least one compound (b) selected from a boron compound, a bismuth compound, and a phosphorus compound, wherein the compound (b) is a compound different from the compound (a).Type: ApplicationFiled: June 9, 2021Publication date: September 28, 2023Applicant: SHOWA DENKO K.K.Inventors: Ryosuke SEI, Kunchan LEE, Yoshiyuki INAGUMA
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Publication number: 20230291003Abstract: A solid electrolyte material, a solid electrolyte, a method for producing the solid electrolyte, and an all-solid-state battery. The solid electrolyte material includes lithium, tantalum, phosphorus, and oxygen as constituent elements, and a temperature of an exothermic peak in a differential thermal analysis (DTA) curve of the solid electrolyte material is in the range of 500 to 850° C.Type: ApplicationFiled: June 9, 2021Publication date: September 14, 2023Applicant: SHOWA DENKO K.K.Inventors: Ryosuke SEI, Kunchan LEE
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Publication number: 20230282875Abstract: A solid electrolyte material, a solid electrolyte, a method for producing the solid electrolyte, and an all-solid-state battery. The solid electrolyte material includes lithium, tantalum, phosphorus, and oxygen as constituent elements and includes at least one element selected from boron, niobium, silicon, and bismuth as a constituent element, and is amorphous.Type: ApplicationFiled: June 9, 2021Publication date: September 7, 2023Applicant: SHOWA DENKO K.K.Inventors: Ryosuke SEI, Kunchan LEE
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Publication number: 20230223589Abstract: One embodiment of the present invention relates to a solid electrolyte material, a solid electrolyte, a method for producing the solid electrolyte, or an all-solid-state battery, and the solid electrolyte material includes lithium, tantalum, phosphorus, and oxygen as constituent elements and has a content of the phosphorus element of more than 5.3 atomic % and less than 8.3 atomic %, and is amorphous.Type: ApplicationFiled: June 9, 2021Publication date: July 13, 2023Applicant: SHOWA DENKO K.K.Inventors: Ryosuke SEI, Kunchan LEE
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Publication number: 20230223590Abstract: The invention relates to a solid electrolyte material, solid electrolyte, method for producing the solid electrolyte, and all-solid-state battery, and the solid electrolyte material includes lithium, tantalum, phosphorus, and oxygen as constituent elements and includes at least one element selected from boron, niobium, bismuth, and silicon as a constituent element, and satisfies any of requirements (I) to (III). Requirement (I): A peak top of a 31P-NMR spectrum of the solid electrolyte material is in the range of ?9.5 to 5.0 ppm. Requirement (II): A peak top of a 7Li-NMR spectrum of the solid electrolyte material is in the range of ?2.00 to 0.00 ppm. Requirement (III): A peak top of a 31P-NMR spectrum of the solid electrolyte material is in the range of ?9.5 to 5.0 ppm, and a peak top of a 7Li-NMR spectrum of the solid electrolyte material is in the range of ?2.00 to 0.00 ppm.Type: ApplicationFiled: June 9, 2021Publication date: July 13, 2023Applicant: SHOWA DENKO K.K.Inventors: Ryosuke SEI, Kunchan LEE
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Publication number: 20230216085Abstract: One embodiment of the present invention relates to a solid electrolyte material, a solid electrolyte, a method for producing the solid electrolyte, or an all-solid-state battery, and the solid electrolyte material includes lithium, tantalum, boron, phosphorus, and oxygen as constituent elements, wherein a peak position of a peak having the maximum peak intensity among an 11B-NMR peak is in the range of -15.0 to -5.0 ppm.Type: ApplicationFiled: June 9, 2021Publication date: July 6, 2023Applicant: SHOWA DENKO K.K.Inventors: Ryosuke SEI, Kunchan LEE
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Publication number: 20230178796Abstract: A lithium ion conductive solid electrolyte or an all-solid-state battery. The lithium ion conductive solid electrolyte satisfies any of (I) to (III): (I) having a crystal structure based on LiTa2PO8 and a crystal structure based on at least one compound selected from LiTa3O8, Ta2O5, and TaPO5; (II) being represented by the stoichiometric formula of Lia1Tab1Bc1Pd1Oe1 where 0.5<a1<2.0, 1.0<b1?2.0, 0<c1<0.5, 0.5<d1<1.0, and 5.0<e1?8.0; (III) being represented by the stoichiometric formula of Lia2Tab2Mac2Bd2Pe2Of2 where 0.5<a2<2.0, 1.0<b2?2.0, 0<c2<0.5, 0<d2<0.5, 0.5<e2<1.0, and 5.0<f2?8.0, and Ma is one or more elements selected from the group consisting of Nb, Zr, Ga, Sn, Hf, Bi, W, Mo, Si, Al, and Ge.Type: ApplicationFiled: June 9, 2021Publication date: June 8, 2023Applicant: SHOWA DENKO K.K.Inventors: Ryosuke SEI, Kunchan LEE
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Publication number: 20230026839Abstract: The present invention aims to provide a lithium ion-conducting oxide capable of providing a solid electrolyte with an excellent ion conductivity, and a solid electrolyte, a sintered body, an electrode material or an electrode and an all-solid-state battery using the same. The lithium ion-conducting oxide of the present invention includes at least lithium, tantalum, phosphorus, silicon, and oxygen as constituent elements, has a peak in a region of ?20.0 ppm to 0.0 ppm on the solid-state 31P-NMR spectrum, and has a peak in a range of ?80.0 ppm to ?100.0 ppm on the solid-state 29Si-NMR spectrum.Type: ApplicationFiled: December 25, 2020Publication date: January 26, 2023Applicant: SHOWA DENKO K.K.Inventors: Ryosuke SEI, Kunchan LEE
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Publication number: 20230017483Abstract: The present invention aims to provide a lithium-ion-conducting oxide sintered body capable of providing a solid electrolyte with an excellent ion conductivity, and a solid electrolyte, an electrode and an all-solid-state battery using the same. The lithium-ion-conducting oxide sintered body including at least lithium, tantalum, phosphorus, silicon, and oxygen as constituent elements, and having a polycrystalline structure consisting of crystal grains and grain interfaces formed between the crystal grains.Type: ApplicationFiled: December 25, 2020Publication date: January 19, 2023Applicant: SHOWA DENKO K.K.Inventors: Ryosuke SEI, Kunchan LEE
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Publication number: 20220359907Abstract: An embodiment of the present invention relates to a lithium ion-conducting oxide or a lithium-ion secondary battery. The lithium ion-conducting oxide includes at least lithium, tantalum, phosphorus, M2, and oxygen as constituent elements, wherein M2 is at least one element selected from the group consisting of elements of the Group 14 and Al (provided that carbon is excluded), a ratio of number of atoms of each constituent element of lithium, tantalum, phosphorus, M2, and oxygen is 1:2:1?y:y:8, wherein y is more than 0 and less than 0.7, and the lithium ion-conducting oxide contains a monoclinic crystal.Type: ApplicationFiled: August 26, 2020Publication date: November 10, 2022Applicant: SHOWA DENKO K.K.Inventors: Ryosuke SEI, Kunchan LEE, Shunsuke KURAHASHI
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Publication number: 20220311001Abstract: A lithium ion-conducting oxide including at least lithium, tantalum, M1, phosphorus, and oxygen as constituent elements. M1 is at least one metal element selected from elements of the Group 4, the Group 5, the Group 6, the Group 13, and the Group 14 (provided that tantalum is excluded), a ratio of number of atoms of each constituent element of lithium, tantalum, M1, phosphorus, and oxygen is 1:2?x:x:1:8, wherein x is more than 0 and less than 1, and the lithium ion-conducting oxide contains a monoclinic crystal. Also disclosed is a lithium-ion secondary battery including the lithium ion-conducting oxide.Type: ApplicationFiled: August 26, 2020Publication date: September 29, 2022Applicant: SHOWA DENKO K.K.Inventors: Ryosuke SEI, Kunchan LEE, Shunsuke KURAHASHI
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Publication number: 20200406241Abstract: An object of the invention is to provide an oxygen reduction catalyst composed of a titanium oxynitride having high oxygen reduction capacity. The oxygen reduction catalyst of the invention is a titanium oxynitride that has a nitrogen element content of 0.1 to 2.0 mass %, has a crystal structure of rutile titanium dioxide in a powder X-ray diffraction measurement, and has a signal intensity ratio N—Ti—N/O—Ti—N in an X-ray photoelectron spectroscopic analysis of in the range of 0.01 to 0.50. Further, the oxygen reduction catalyst of the invention is a titanium oxynitride that includes titanium oxide particles, has a crystal structure of rutile titanium dioxide, and has an amorphous layer in a surface layer of the titanium oxide particles.Type: ApplicationFiled: December 22, 2017Publication date: December 31, 2020Applicants: SHOWA DENKO K.K., NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITYInventors: Kunchan LEE, Yoshinori YAMATO, Kenichiro OTA, Akimitsu ISHIHARA
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Patent number: 10727514Abstract: Provided are an oxygen reduction catalyst having a high electrode potential under a fuel cell operating environment, an electrode containing the oxygen reduction catalyst, a membrane electrode assembly in which a cathode is the electrode, and a fuel cell including the membrane electrode assembly. The oxygen reduction catalyst used here contains cobalt, sulfur, and oxygen as elements, has a CoS2 cubic structure in powder X-ray diffractometry, and having an S—Co/S—O peak area ratio of 6 to 15 in an S2p spectrum in X-ray photoelectron spectroscopic analysis.Type: GrantFiled: March 22, 2018Date of Patent: July 28, 2020Assignee: SHOWA DENKO K.K.Inventors: Takuya Imai, Kazuo Furuya, Kunchan Lee
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Patent number: 10720649Abstract: Provided are an oxygen reduction catalyst having a high electrode potential under a fuel cell operating environment, an electrode containing the oxygen reduction catalyst, a membrane electrode assembly in which a cathode is the electrode, and a fuel cell including the membrane electrode assembly. The oxygen reduction catalyst used here contains cobalt, sulfur, and oxygen as elements, has a CoS hexagonal structure in powder X-ray diffractometry, and having an S—Co/S—O peak area ratio of 2.1 to 8.9 in an S2p spectrum in X-ray photoelectron spectroscopic analysis.Type: GrantFiled: March 22, 2018Date of Patent: July 21, 2020Assignee: SHOWA DENKO K.K.Inventors: Takuya Imai, Kazuo Furuya, Kunchan Lee
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Patent number: 10658676Abstract: An object of the invention is to provide an oxygen reduction catalyst composed of a titanium oxynitride having high oxygen reduction capacity. The oxygen reduction catalyst of the invention is a titanium oxynitride that has a nitrogen element content of 8.0 to 15 mass %, has a crystal structure of anatase titanium dioxide in a powder X-ray diffraction measurement, and has a signal intensity ratio N—Ti—N/O—Ti—N in an X-ray photoelectron spectroscopic analysis of in the range of 0.35 to 0.70.Type: GrantFiled: December 22, 2017Date of Patent: May 19, 2020Assignees: SHOWA DENKO K.K., NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITYInventors: Kunchan Lee, Yoshinori Yamato, Kenichiro Ota, Akimitsu Ishihara
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Publication number: 20200147590Abstract: An oxygen reduction catalyst containing as constituent elements cobalt, sulfur, and a transition metal element M being at least one element selected from chromium and molybdenum, the oxygen reduction catalyst being ascertained to have a crystal structure of a cobalt disulfide cubic crystal in powder X-ray diffraction measurement, and having a molar ratio of the transition metal element M to cobalt (M/cobalt) of 5/95 to 15/85. Also disclosed is an electrode having a catalyst layer containing the oxygen reduction catalyst, a membrane electrode assembly including a polymer electrolyte membrane wherein the electrode serves as a cathode and/or an anode, and a fuel cell including the membrane electrode assembly.Type: ApplicationFiled: December 27, 2017Publication date: May 14, 2020Applicant: SHOWA DENKO K.K.Inventors: Takuya IMAI, Kazuo FURUYA, Kunchan LEE, Suguru SAKAGUCHI, Yoshishige OKUNO
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Patent number: 10573902Abstract: The present invention relates to an oxygen reduction catalyst, an electrode, a membrane electrode assembly, and a fuel cell, and the oxygen reduction catalyst is an oxygen reduction catalyst containing substituted CoS2, in which the substituted CoS2 has a cubic crystal structure, the oxygen reduction catalyst contains the substituted CoS2 within 0.83 nm from the surface thereof, and the substituted CoS2 has at least one substitutional atom selected from the group consisting of Cr, Mo, Mn, Tc, Re, Rh, Cu, and Ag in some of Co atom sites.Type: GrantFiled: December 27, 2017Date of Patent: February 25, 2020Assignee: SHOWA DENKO K.K.Inventors: Suguru Sakaguchi, Yoshishige Okuno, Takuya Imai, Kunchan Lee
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Publication number: 20200028182Abstract: Provided are an oxygen reduction catalyst having a high electrode potential under a fuel cell operating environment, an electrode containing the oxygen reduction catalyst, a membrane electrode assembly in which a cathode is the electrode, and a fuel cell including the membrane electrode assembly. The oxygen reduction catalyst used here contains cobalt, sulfur, and oxygen as elements, has a CoS hexagonal structure in powder X-ray diffractometry, and having an S—Co/S—O peak area ratio of 2.1 to 8.9 in an S2p spectrum in X-ray photoelectron spectroscopic analysis.Type: ApplicationFiled: March 22, 2018Publication date: January 23, 2020Applicant: SHOWA DENKO K.K.Inventors: Takuya IMAI, Kazuo FURUYA, Kunchan LEE