Patents by Inventor Yoshinori Nishiki
Yoshinori Nishiki 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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Patent number: 11965256Abstract: The present invention provides an alkaline water electrolysis anode such that even when electric power having a large output fluctuation, such as renewable energy, is used as a power source, the electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a long period of time. The alkaline water electrolysis anode is an alkaline water electrolysis anode 10 provided with an electrically conductive substrate 2 at least a surface of which contains nickel or a nickel base alloy and a catalyst layer 6 disposed on the surface of the electrically conductive substrate 2, the catalyst layer 6 containing a nickel-containing metal oxide having a spinel structure, wherein the nickel-containing metal oxide contains nickel (Ni) and manganese (Mn), and has an atom ratio of Li/Ni/Mn/O of (0.0 to 0.8)/(0.4 to 0.6)/(1.0 to 1.8)/4.0.Type: GrantFiled: October 14, 2021Date of Patent: April 23, 2024Assignees: KYOTO UNIVERSITY, NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, DE NORA PERMELEC LTDInventors: Yoshiharu Uchimoto, Tomoki Uchiyama, Shigenori Mitsushima, Yoshiyuki Kuroda, Kensaku Nagasawa, Yoshinori Nishiki, Awaludin Zaenal, Yun Bao
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Publication number: 20240066536Abstract: [Problem] To provide an electrode manufacturing method and an electrode manufacturing device with high productivity, and an electrode obtained therewith. [Solution] Provided is an electrode manufacturing method, comprising performing pyrolysis while simultaneously directly spraying a coating liquid onto a heated substrate to form a catalytic layer or intermediate layer on the substrate.Type: ApplicationFiled: January 6, 2022Publication date: February 29, 2024Inventors: Zaenal AWALUDIN, Yoshinori NISHIKI
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Patent number: 11866834Abstract: The present invention provides an electrode for electrolysis in which electrolysis performance is hard to deteriorate and excellent catalytic activity is kept stable over a long period of time even when electric power in which there is a large fluctuation in output, such as renewable energy, is used as a power source. The electrode for electrolysis is an electrode 10 for electrolysis provided with an electrically conductive substrate 2 at least the surface of which contains nickel or a nickel-based alloy, an intermediate layer 4 formed on the surface of the electrically conductive substrate 2 and containing a lithium-containing nickel oxide represented by composition formula LixNi2-xO2 (0.02?x?0.5), and a catalyst layer 6 of a nickel cobalt spinel oxide, an iridium oxide, or the like, the catalyst layer 6 formed on the surface of the intermediate layer 4.Type: GrantFiled: March 4, 2019Date of Patent: January 9, 2024Assignees: DE NORA PERMELEC LTD, KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Shigenori Mitsushima, Yoshiyuki Kuroda, Ikuo Nagashima, Tatsuya Taniguchi, Yoshinori Nishiki, Akihiro Kato, Awaludin Zaenal, Fumiya Tsujii, Takaaki Nakai
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Publication number: 20230408444Abstract: The present invention provides an accelerated evaluation method for an anode, the method imitating electric power having a large output fluctuation, such as renewable energy, and enabling an accurate evaluation, in a shorter time, of durability of an anode using such electric power having a large output fluctuation as a power source. The method is an accelerated evaluation method for an anode, the method performing evaluation of the durability of the anode in an accelerated manner by electrochemical operation in an aqueous electrolyte. The method includes a Je step of loading an oxidation current of 0.1 A/cm2 or more to the anode for a duration of Te and an Emin step of holding the anode at a constant potential lower than an open circuit potential for a duration of Train, wherein each of the Je step and the Emin step is repeated 100 times or more.Type: ApplicationFiled: November 17, 2021Publication date: December 21, 2023Inventors: Shigenori MITSUSHIMA, Yoshiyuki KURODA, Kensaku NAGASAWA, Ashraf ABDELHALEEM, Awaludin ZAENAL, Yoshinori NISHIKI
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Patent number: 11794147Abstract: A wastewater treatment method includes: a soft water treatment 1 of crystallizing calcium carbonate from wastewater to remove the calcium carbonate therefrom; and an electrolysis 2 of electrolyzing some of the wastewater from which the calcium carbonate has been removed to obtain an acidic aqueous solution and an alkaline aqueous solution, wherein at least some of the alkaline aqueous solution is circulated to be used in the soft water treatment 1.Type: GrantFiled: September 2, 2020Date of Patent: October 24, 2023Assignees: Yokogawa Electric Corporation, De Nora Permelec LtdInventors: Yasuhiro Matsui, Hideki Komatsu, Yasuhito Ishii, Manabu Ozawa, Yoshinori Nishiki, Masaaki Kato, Rie Morita
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Publication number: 20230332309Abstract: The present invention provides an alkaline water electrolysis anode such that even when electric power having a large output fluctuation, such as renewable energy, is used as a power source, the electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a long period of time. The alkaline water electrolysis anode is an alkaline water electrolysis anode 10 provided with an electrically conductive substrate 2 at least a surface of which contains nickel or a nickel base alloy and a catalyst layer 6 disposed on the surface of the electrically conductive substrate 2, the catalyst layer 6 containing a metal composite oxide having a quadruple perovskite oxide structure, wherein the metal composite oxide contains calcium (Ca), manganese (Mn), and nickel (Ni), and has an atom ratio of Ca/Mn/Ni/O of (1.0)/(6.6 to 7.0)/(0.1 to 0.4)/12.0.Type: ApplicationFiled: October 14, 2021Publication date: October 19, 2023Inventors: Yoshiharu UCHIMOTO, Tomoki UCHIYAMA, Shigenori MITSUSHIMA, Yoshiyuki KURODA, Kensaku NAGASAWA, Yoshinori NISHIKI
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Publication number: 20230323547Abstract: The present invention provides an alkaline water electrolysis anode such that even when electric power having a large output fluctuation, such as renewable energy, is used as a power source, the electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a long period of time. The alkaline water electrolysis anode is an alkaline water electrolysis anode 10 provided with an electrically conductive substrate 2 at least a surface of which contains nickel or a nickel base alloy and a catalyst layer 6 disposed on the surface of the electrically conductive substrate 2, the catalyst layer 6 containing a nickel-containing metal oxide having a spinel structure, wherein the nickel-containing metal oxide contains nickel (Ni) and manganese (Mn), and has an atom ratio of Li/Ni/Mn/O of (0.0 to 0.8)/(0.4 to 0.6)/(1.0 to 1.8)/4.0.Type: ApplicationFiled: October 14, 2021Publication date: October 12, 2023Inventors: Yoshiharu UCHIMOTO, Tomoki UCHIYAMA, Shigenori MITSUSHIMA, Yoshiyuki KURODA, Kensaku NAGASAWA, Yoshinori NISHIKI, Awaludin ZAENAL, Yun BAO
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Publication number: 20230279566Abstract: The present invention provides an alkaline water electrolysis anode such that even when electric power having a large output fluctuation, such as renewable energy, is used as a power source, the electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a long period of time. The alkaline water electrolysis anode is an alkaline water electrolysis anode 10 provided with an electrically conductive substrate 2 at least a surface of which contains nickel or a nickel base alloy and a catalyst layer 6 disposed on the surface of the electrically conductive substrate 2, the catalyst layer 6 containing a lithium composite oxide having a rock salt type structure, wherein the lithium composite oxide contains lithium (Li), nickel (Ni), iron (Fe), and aluminum (Al), and has an atom ratio of Li/Ni/Fe/Al/O of (0.4 to 1.1)/(0.4 to 0.8)/(0.05 to 0.2)/(0.05 to 0.2)/2.0.Type: ApplicationFiled: July 29, 2021Publication date: September 7, 2023Inventors: Yoshiharu UCHIMOTO, Tomoki UCHIYAMA, Shigenori MITSUSHIMA, Yoshiyuki KURODA, Kensaku NAGASAWA, Yoshinori NISHIKI
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Publication number: 20230241555Abstract: A wastewater treatment method includes: a soft water treatment 1 of crystallizing calcium carbonate from wastewater to remove the calcium carbonate therefrom; and an electrolysis 2 of electrolyzing some of the wastewater from which the calcium carbonate has been removed to obtain an acidic aqueous solution and an alkaline aqueous solution, wherein at least some of the alkaline aqueous solution is circulated to be used in the soft water treatment 1.Type: ApplicationFiled: September 2, 2020Publication date: August 3, 2023Inventors: Yasuhiro MATSUI, Hideki KOMATSU, Yasuhito ISHII, Manabu OZAWA, Yoshinori NISHIKI, Masaaki KATO, Rie MORITA
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Patent number: 11692276Abstract: The present invention realizes industrially excellent effects such that when electric power having a large output fluctuation, such as renewable energy, is used as a power source, electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a longer period of time, and in addition, the present invention provides a technique that enables forming a catalyst layer of an oxygen generation anode, which gives such excellent effects, with a more versatile materials and by a simple electrolysis method.Type: GrantFiled: March 8, 2021Date of Patent: July 4, 2023Assignees: DE NORA PERMELEC LTD, KAWASAKI JUKOGYO KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITYInventors: Shigenori Mitsushima, Yoshiyuki Kuroda, Shohei Takatsu, Ikuo Nagashima, Tatsuya Taniguchi, Akihiko Inomata, Ayaka Nagai, Yoshinori Nishiki, Akihiro Kato, Awaludin Zaenal, Takaaki Nakai
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Publication number: 20230109702Abstract: The present invention realizes industrially excellent effects such that when electric power having a large output fluctuation, such as renewable energy, is used as a power source, electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a longer period of time, and in addition, the present invention provides a technique that enables forming a catalyst layer of an oxygen generation anode, which gives such excellent effects, with a more versatile materials and by a simple electrolysis method.Type: ApplicationFiled: March 8, 2021Publication date: April 13, 2023Inventors: Shigenori MITSUSHIMA, Yoshiyuki KURODA, Shohei TAKATSU, Ikuo NAGASHIMA, Tatsuya TANIGUCHI, Akihiko INOMATA, Ayaka NAGAI, Yoshinori NISHIKI, Akihiro KATO, Awaludin ZAENAL, Takaaki NAKAI
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Patent number: 11519082Abstract: An organic hydride production apparatus includes: an electrolyte membrane having proton conductivity; a cathode that includes a cathode catalyst layer used to hydrogenate a hydrogenation target substance using protons to produce an organic hydride and also includes a cathode chamber; an anode that includes an anode catalyst layer used to oxidize water to produce protons and also includes an anode chamber; and a gas introduction unit that introduces, into the anolyte at a certain position, a certain gas used to remove at least one of the hydrogenation target substance and the organic hydride that have passed through the electrolyte membrane and been mixed into the anolyte.Type: GrantFiled: May 15, 2019Date of Patent: December 6, 2022Assignees: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, DE NORA PERMELEC LTD.Inventors: Shigenori Mitsushima, Kensaku Nagasawa, Yoshinori Nishiki, Akihiro Kato, Setsuro Ogata, Awaludin Zaenal, Akiyoshi Manabe, Koji Matsuoka, Yasushi Sato
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Publication number: 20220333257Abstract: An organic hydride production apparatus includes: an electrolyte membrane having proton conductivity; a cathode, provided on one side of the electrolyte membrane, that contains a cathode catalyst used to hydrogenate a hydrogenation target substance using protons to produce an organic hydride; an anode, provided opposite to the one side of the electrolyte membrane, that contains an anode catalyst used to oxidize water to produce protons; and an anode support, provided opposite to the electrolyte membrane side of the anode, that supports the anode. The anode support is formed of an elastic porous body of which the Young's modulus is greater than 0.1 N/mm2 and less than 43 N/mm2.Type: ApplicationFiled: July 6, 2022Publication date: October 20, 2022Applicants: National University Corporation YOKOHAMA National University, DE NORA PERMELEC LTDInventors: Shigenori MITSUSHIMA, Kensaku NAGASAWA, Yoshinori NISHIKI, Setsuro OGATA, Akihiro KATO, Awaludin ZAENAL, Koji MATSUOKA, Yasushi SATO
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Publication number: 20220242757Abstract: An apparatus (100) for producing an acidic aqueous solution includes: an electrodialyzer (110) that has a monovalent ion perm-selective ion-exchange membrane and separates wastewater containing chloride ions and alkali metal ions into electrodialysis concentrated water and electrodialysis diluted water by an electrodialysis treatment; an electrolyzer (120) includes an anode that that electrolyzes the electrodialysis concentrated water to produce an acidic aqueous solution; and a first circulator (13) that circulates at least some of the acidic aqueous solution to the wastewater supplied to the electrodialyzer (110), and that adjusts a pH of the wastewater supplied to the electrodialyzer to 3 to 9.Type: ApplicationFiled: September 4, 2020Publication date: August 4, 2022Applicant: DE NORA PERMELEC LTDInventors: Manabu OZAWA, Yoshinori NISHIKI, Masaaki KATO, Rie MORITA
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Patent number: 11236428Abstract: To provide an electrolysis cell for producing an organic chemical hydride capable of advancing a reduction reaction in a cathode of an organic compound having an unsaturated bond with high current efficiency and a small electric power consumption unit.Type: GrantFiled: September 18, 2015Date of Patent: February 1, 2022Assignees: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, DE NORA PERMELEC LTD.Inventors: Shigenori Mitsushima, Yasutomo Takakuwa, Yoshinori Nishiki, Akihiro Kato, Akiyoshi Manabe
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Patent number: 11035045Abstract: An organic hydride production apparatus that enables the reduction reaction at the cathode of an organic compound having an unsaturated bond to proceed at high current efficiency and at a low electric power consumption rate, and a method for producing an organic hydride that uses this production apparatus.Type: GrantFiled: November 19, 2015Date of Patent: June 15, 2021Assignees: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, DE NORA PERMELEC LTD.Inventors: Shigenori Mitsushima, Yasutomo Takakuwa, Yoshinori Nishiki, Akihiro Kato, Akiyoshi Manabe
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Publication number: 20200407860Abstract: The present invention provides an electrode for electrolysis in which electrolysis performance is hard to deteriorate and excellent catalytic activity is kept stable over a long period of time even when electric power in which there is a large fluctuation in output, such as renewable energy, is used as a power source. The electrode for electrolysis is an electrode 10 for electrolysis provided with an electrically conductive substrate 2 at least the surface of which contains nickel or a nickel-based alloy, an intermediate layer 4 formed on the surface of the electrically conductive substrate 2 and containing a lithium-containing nickel oxide represented by composition formula LixNi2-xO2 (0.02?x?0.5), and a catalyst layer 6 of a nickel cobalt spinel oxide, an iridium oxide, or the like, the catalyst layer 6 formed on the surface of the intermediate layer 4.Type: ApplicationFiled: March 4, 2019Publication date: December 31, 2020Inventors: Shigenori MITSUSHIMA, Yoshiyuki KURODA, Ikuo NAGASHIMA, Tatsuya TANIGUCHI, Yoshinori NISHIKI, Akihiro KATO, Awaludin ZAENAL, Fumiya TSUJII, Takaaki NAKAI
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Patent number: 10676832Abstract: Provided is a method capable of producing, in a simple and low-cost manner, an electrolysis electrode which can be used in alkaline water electrolysis and has superior durability against output variation. The method for producing an anode for alkaline water electrolysis includes: a step of dissolving lithium nitrate and a nickel carboxylate in water to prepare an aqueous solution containing lithium ions and nickel ions, a step of applying the aqueous solution to the surface of a conductive substrate having at least the surface composed of nickel or a nickel-based alloy, and a step of subjecting the conductive substrate to which the aqueous solution has been applied to a heat treatment at a temperature within a range from at least 450° C. to not more than 600° C., thereby forming a catalyst layer composed of a lithium-containing nickel oxide on the conductive substrate.Type: GrantFiled: September 11, 2017Date of Patent: June 9, 2020Assignees: DE NORA PERMELEC LTD, NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Shigenori Mitsushima, Sho Fujita, Ikuo Nagashima, Yoshinori Nishiki, Akiyoshi Manabe, Akihiro Kato
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Publication number: 20200080212Abstract: An organic hydride production apparatus includes: an electrolyte membrane having proton conductivity; a cathode, provided on one side of the electrolyte membrane, that contains a cathode catalyst used to hydrogenate a hydrogenation target substance using protons to produce an organic hydride; an anode, provided opposite to the one side of the electrolyte membrane, that contains an anode catalyst used to oxidize water to produce protons; and an anode support, provided opposite to the electrolyte membrane side of the anode, that supports the anode. The anode support is formed of an elastic porous body of which the Young's modulus is greater than 0.1 N/mm2 and less than 43 N/mm2.Type: ApplicationFiled: November 18, 2019Publication date: March 12, 2020Applicants: National University Corporation YOKOHAMA National University, DE NORA PERMELEC LTDInventors: Shigenori MITSUSHIMA, Kensaku NAGASAWA, Yoshinori NISHIKI, Setsuro OGATA, Akihiro KATO, Awaludin ZAENAL, Koji MATSUOKA, Yasushi SATO
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Publication number: 20190352786Abstract: An organic hydride production apparatus includes: an electrolyte membrane having proton conductivity; a cathode that includes a cathode catalyst layer used to hydrogenate a hydrogenation target substance using protons to produce an organic hydride and also includes a cathode chamber; an anode that includes an anode catalyst layer used to oxidize water to produce protons and also includes an anode chamber; and a gas introduction unit that introduces, into the anolyte at a certain position, a certain gas used to remove at least one of the hydrogenation target substance and the organic hydride that have passed through the electrolyte membrane and been mixed into the anolyte.Type: ApplicationFiled: October 18, 2017Publication date: November 21, 2019Applicants: National University Corporation YOKOHAMA National University, DE NORA PERMELEC LTDInventors: Shigenori MITSUSHIMA, Kensaku NAGASAWA, Yoshinori NISHIKI, Akihiro KATO, Setsuro OGATA, Awaludin ZAENAL, Akiyoshi MANABE, Koji MATSUOKA, Yasushi SATO