Patents by Inventor Kazuki Okuno
Kazuki Okuno 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: 20200388890Abstract: A coolant includes a refrigerant, a porous plate-shaped heat insulator, and an enclosure in which the refrigerant and the heat insulator are enclosed in a sealed state, and the heat insulator has a thermal conductivity per unit area of 300 W/(K·m2) or less and a thickness equal to or greater than 0.5 mm and equal to or less than 10.0 mm.Type: ApplicationFiled: September 13, 2018Publication date: December 10, 2020Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., Sumitomo Wiring Systems, Ltd., AutoNetworks Technologies, Ltd.Inventors: Koma NUMATA, Masatoshi MAJIMA, Kazuki OKUNO, Hiroki HIRAI, Tetsuji TANAKA, Makoto HIGASHIKOZONO, Junichi ONO
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Publication number: 20200377973Abstract: A metal porous body having a three-dimensional network structure, includes: a framework forming the three-dimensional network structure; and a coating layer having fine pores and coating the framework, the three-dimensional network structure including a rib and a node connecting a plurality of ribs, the framework including an alkali-resistant first metal, the fine pores having an average fine pore diameter of 10 nm or more and 1 ?m or less, the coating layer including an alkali-resistant second metal and optionally including an alkali-soluble metal, the alkali-soluble metal being contained at a proportion of 0% by mass or more and 30% by mass or less with reference to a total mass of the framework and the coating layer.Type: ApplicationFiled: December 6, 2018Publication date: December 3, 2020Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITYInventors: Kazuki OKUNO, Takahiro HIGASHINO, Hiromasa TAWARAYAMA, Masatoshi MAJIMA, Haruki MASUMURA, Yoshiyuki KURODA, Shigenori MITSUSHIMA
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Publication number: 20200373585Abstract: A metal porous body is a metal porous body mainly composed of nickel and having a framework of a three-dimensional network structure, Ni(OH)2 being present in a surface of the framework, when the metal porous body is subjected to at least 30 potential scans between a lower limit potential of ?0.10 V and an upper limit potential of +0.65 V with respect to a hydrogen standard potential in not less than 10% by mass and not more than 35% by mass of a potassium hydroxide aqueous solution, at least oxygen being detected within a depth of 5 nm from the surface, and hydrogen being detected at least in the surface.Type: ApplicationFiled: July 11, 2018Publication date: November 26, 2020Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC TOYAMA CO., LTD., PRIMEARTH EV ENERGY CO., LTD.Inventors: Kazuki OKUNO, Masatoshi MAJIMA, Hitoshi TSUCHIDA, Junichi NISHIMURA, Koutarou KIMURA, Yusuke SHIMIZU
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Publication number: 20200373586Abstract: Provided are a porous metal body that is excellent in terms of corrosion resistance and that is suitable for a collector for batteries such as lithium-ion batteries, capacitors, or fuel cells; and methods for producing the porous metal body. A production method includes a step of coating a porous nickel body with an alloy containing at least nickel and tungsten or a metal containing at least tin; and a subsequent step of a heat treatment. Another production method includes a step of forming a nickel-plated layer on a porous base and then continuously forming an alloy-plated layer containing at least nickel and tungsten or tin, a step of removing the porous base, and a step of reducing metal. Such a method can provide a porous metal body in which tungsten or tin is diffused in a porous nickel body or a nickel-plated layer.Type: ApplicationFiled: August 11, 2020Publication date: November 26, 2020Inventors: Kazuki Okuno, Masahiro Kato, Masatoshi Majima, Tomoyuki Awazu, Hidetoshi Saito, Junichi Nishimura, Keiji Shiraishi, Hitoshi Tsuchida, Kengo Tsukamoto
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Patent number: 10811696Abstract: A porous metal body including a skeleton having a three-dimensional mesh-like structure, the porous metal body having a plate-like overall shape. The skeleton has a hollow structure and includes a primary metal layer and at least one of a first microporous layer and a second microporous layer. The primary metal layer is composed of nickel or a nickel alloy. The first microporous layer contains nickel and chromium and is disposed on the outer peripheral surface of the primary metal layer. The second microporous layer contains nickel and chromium and is disposed on the inner peripheral surface of the primary metal layer, the inner peripheral surface facing the hollow space of the skeleton.Type: GrantFiled: July 28, 2016Date of Patent: October 20, 2020Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazuki Okuno, Takahiro Higashino, Masatoshi Majima, Tomoyuki Awazu
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Patent number: 10797323Abstract: A current collector included in a fuel cell, the fuel cell including a membrane electrode assembly including a solid polymer electrolyte layer and a pair of electrode layers formed to sandwich the solid polymer electrolyte layer, the current collector stacked on each electrode layer, and a gas flow path for supply of a gas to each electrode layer, the current collector including a metal porous body which is stacked on the electrode layer, has a flowing gas supplied to the electrode layer, and is rendered conducting to the electrode layer, and the metal porous body including an electrically conductive layer containing electrically conductive particles fixed to a corrosion-resistant and water-repellent resin at least on a side of the electrode layer.Type: GrantFiled: March 19, 2015Date of Patent: October 6, 2020Assignees: Sumitomo Electric Industries, Ltd., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Kazuki Okuno, Takahiro Higashino, Masatoshi Majima, Tsutomu Iwaki, Masahiro Yanagida, Tetsuo Sakai
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Publication number: 20200251750Abstract: A porous metal body has a three-dimensional mesh-like structure skeleton and containing at least nickel and tin. The nickel content is 50 mass % or more, and the tin content is 5 mass % or more and 25 mass % or less. The porous metal body has a thickness of 0.10 mm or more and 0.50 mm or less.Type: ApplicationFiled: March 23, 2020Publication date: August 6, 2020Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazunari MIYAMOTO, Tomoyuki AWAZU, Masatoshi MAJIMA, Kazuki OKUNO, Takahiro HIGASHINO
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Publication number: 20200190680Abstract: A composite metal porous body according to an aspect of the present invention has a framework of a three-dimensional network structure. The framework includes a porous base material and a metal film coated on the surface of the porous base material. The metal film contains titanium metal or titanium alloy as the main component.Type: ApplicationFiled: March 13, 2018Publication date: June 18, 2020Applicant: Sumitomo Electric Industries, Ltd.Inventors: Koma NUMATA, Masatoshi MAJIMA, Tomoyuki AWAZU, Mitsuyasu OGAWA, Kazuki OKUNO, Takahiro HIGASHINO
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Publication number: 20200161666Abstract: A metal porous body includes a flat plate shape and having continuous pores, a framework of the metal porous body having an alloy layer containing nickel and chromium, and a silver layer being formed on a surface of the alloy layer.Type: ApplicationFiled: June 22, 2018Publication date: May 21, 2020Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Koma NUMATA, Masatoshi MAJIMA, Tomoyuki AWAZU, Kazuki OKUNO, Chihiro HIRAIWA
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Publication number: 20200136136Abstract: An aqueous solution electrolyte secondary battery includes: a positive electrode including a positive electrode active material that reversibly occludes and releases lithium ions; a negative electrode including a negative electrode active material that reversibly occludes and releases lithium ions; and an aqueous solution electrolyte in which a lithium salt is dissolved. The negative electrode active material contains Mo, at least part of the Mo causes an oxidation-reduction reaction of Mo3+/Mo6+ through charging and discharging, and a potential window for charging and discharging exceeds 2.0 V.Type: ApplicationFiled: March 8, 2018Publication date: April 30, 2020Applicants: Sumitomo Electric Industries, Ltd., Tokyo Denki UniversityInventors: Koji NITTA, Shoichiro SAKAI, Atsushi FUKUNAGA, Kazuki OKUNO, Naoaki YABUUCHI
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Publication number: 20200099063Abstract: A porous metal body including a skeleton having a three-dimensional mesh-like structure, the porous metal body having a plate-like overall shape. The skeleton has a hollow structure and includes a primary metal layer and at least one of a first microporous layer and a second microporous layer. The primary metal layer is composed of nickel or a nickel alloy. The first microporous layer contains nickel and chromium and is disposed on the outer peripheral surface of the primary metal layer. The second microporous layer contains nickel and chromium and is disposed on the inner peripheral surface of the primary metal layer, the inner peripheral surface facing the hollow space of the skeleton.Type: ApplicationFiled: July 28, 2016Publication date: March 26, 2020Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazuki OKUNO, Takahiro HIGASHINO, Masatoshi MAJIMA, Tomoyuki AWAZU
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Publication number: 20200040471Abstract: The present invention provides an oxide-dispersed metal porous body including a porous metal framework, and oxide particles carried in the metal framework.Type: ApplicationFiled: April 23, 2018Publication date: February 6, 2020Applicants: Sumitomo Electric Industries, Ltd., National University Corporation YOKOHAMA National UniversityInventors: Kazuki OKUNO, Masatoshi MAJIMA, Takahiro HIGASHINO, Hiromasa TAWARAYAMA, Shigenori MITSUSHIMA
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Patent number: 10374243Abstract: Provided is a porous current collector which is used for a fuel electrode and has a high gas reforming function and high durability. A porous current collector 9 is provided adjacent to a fuel electrode 4 of a fuel cell 101 that includes a solid electrolyte layer 2, the fuel electrode 4 disposed on one side of the solid electrolyte layer, and an air electrode 3 disposed on the other side. The porous current collector includes a porous metal body 1 and a first catalyst 20. The porous metal body has an alloy layer 12a at least on a surface thereof, the alloy layer containing nickel (Ni) and tin (Sn). The first catalyst, which is in the form of particles, is supported on a surface of the alloy layer, the surface facing pores of the porous metal body, and is capable of processing a carbon component contained in a fuel gas that flows inside the pores.Type: GrantFiled: February 23, 2015Date of Patent: August 6, 2019Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takahiro Higashino, Masatoshi Majima, Hiromasa Tawarayama, Naho Mizuhara, Kazuki Okuno, Chihiro Hiraiwa, Yohei Noda, Masahiro Kato
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Patent number: 10287646Abstract: Provided is a porous metal body having superior corrosion resistance to conventional metal porous bodies composed of nickel-tin binary alloys and conventional metal porous bodies composed of nickel-chromium binary alloys. The porous metal body has a three-dimensional network skeleton and contains at least nickel, tin, and chromium. The concentration of chromium contained in the porous metal body is highest at the surface of the skeleton of the porous metal body and decreases toward the inner side of the skeleton. In one embodiment, the chromium concentration at the surface of the skeleton of the porous metal body is more preferably 3% by mass or more and 70% by mass or less.Type: GrantFiled: April 9, 2014Date of Patent: May 14, 2019Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC TOYAMA CO., LTD.Inventors: Kazuki Okuno, Masatoshi Majima, Kengo Tsukamoto, Hitoshi Tsuchida, Hidetoshi Saito
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Publication number: 20190081332Abstract: An object of the present invention is to inexpensively provide a porous metal body which is usable for an electrode of a fuel cell or the like and which has excellent corrosion resistance. There is provided a porous metal body for a fuel cell, which is a sheet-shaped porous metal body, including at least nickel, tin, and chromium, in which the chromium concentration of at least one surface of the porous metal body is 3% to 50% by mass. In the porous metal body, preferably, the chromium concentration of one surface is higher than the chromium concentration of another surface.Type: ApplicationFiled: November 8, 2018Publication date: March 14, 2019Inventors: Kazuki OKUNO, Tomoyuki AWAZU, Masahiro KATO, Masatoshi MAJIMA, Kengo TSUKAMOTO, Hitoshi TSUCHIDA, Hidetoshi SAITO
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Publication number: 20190067703Abstract: Provided are a porous metal body that is excellent in terms of corrosion resistance and that is suitable for a collector for batteries such as lithium-ion batteries, capacitors, or fuel cells; and methods for producing the porous metal body. A production method includes a step of coating a porous nickel body with an alloy containing at least nickel and tungsten or a metal containing at least tin; and a subsequent step of a heat treatment. Another production method includes a step of forming a nickel-plated layer on a porous base and then continuously forming an alloy-plated layer containing at least nickel and tungsten or tin, a step of removing the porous base, and a step of reducing metal. Such a method can provide a porous metal body in which tungsten or tin is diffused in a porous nickel body or a nickel-plated layer.Type: ApplicationFiled: October 26, 2018Publication date: February 28, 2019Inventors: Kazuki OKUNO, Masahiro KATO, Masatoshi MAJIMA, Tomoyuki AWAZU, Hidetoshi SAITO, Junichi NISHIMURA, Keiji SHIRAISHI, Hitoshi TSUCHIDA, Kengo TSUKAMOTO
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Patent number: 10205177Abstract: A porous metal body is provided that is inexpensive, usable for an electrode of a fuel cell or the like, and has excellent corrosion resistance. There is provided a porous metal body for a fuel cell, which is a sheet-shaped porous metal body, including at least nickel, tin, and chromium, in which the chromium concentration of at least one surface of the porous metal body is 3% to 50% by mass. In the porous metal body, preferably, the chromium concentration of one surface is higher than the chromium concentration of another surface.Type: GrantFiled: April 9, 2014Date of Patent: February 12, 2019Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC TOYAMA CO., LTD.Inventors: Kazuki Okuno, Tomoyuki Awazu, Masahiro Kato, Masatoshi Majima, Kengo Tsukamoto, Hitoshi Tsuchida, Hidetoshi Saito
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Publication number: 20190044159Abstract: A porous metal body has a three-dimensional mesh-like structure skeleton and containing at least nickel and tin. The nickel content is 50 mass % or more, and the tin content is 5 mass % or more and 25 mass % or less. The porous metal body has a thickness of 0.10 mm or more and 0.50 mm or less.Type: ApplicationFiled: January 23, 2017Publication date: February 7, 2019Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazunari MIYAMOTO, Tomoyuki AWAZU, Masatoshi MAJIMA, Kazuki OKUNO, Takahiro HIGASHINO
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Patent number: 10164262Abstract: Provided are a porous metal body that is excellent in terms of corrosion resistance and that is suitable for a collector for batteries such as lithium-ion batteries, capacitors, or fuel cells; and methods for producing the porous metal body. A production method includes a step of coating a porous nickel body with an alloy containing at least nickel and tungsten or a metal containing at least tin; and a subsequent step of a heat treatment. Another production method includes a step of forming a nickel-plated layer on a porous base and then continuously forming an alloy-plated layer containing at least nickel and tungsten or tin, a step of removing the porous base, and a step of reducing metal. Such a method can provide a porous metal body in which tungsten or tin is diffused in a porous nickel body or a nickel-plated layer.Type: GrantFiled: December 9, 2016Date of Patent: December 25, 2018Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC TOYAMA CO., LTD.Inventors: Kazuki Okuno, Masahiro Kato, Masatoshi Majima, Tomoyuki Awazu, Hidetoshi Saito, Junichi Nishimura, Keiji Shiraishi, Hitoshi Tsuchida, Kengo Tsukamoto
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Patent number: 10128513Abstract: An object of the present invention is to provide, at a low cost, a porous metal body that can be used in an electrode of a fuel cell and that has better corrosion resistance. The porous metal body has a three-dimensional mesh-like structure and contains nickel (Ni), tin (Sn), and chromium (Cr). A content ratio of the tin is 10% by mass or more and 25% by mass or less, and a content ratio of the chromium is 1% by mass or more and 10% by mass or less. On a cross section of a skeleton of the porous metal body, the porous metal body contains a solid solution phase of chromium, nickel, and tin. The solid solution phase contains a solid solution phase of chromium and trinickel tin (Ni3Sn), the solid solution phase having a chromium content ratio of 2% by mass or less, and does not contain a solid solution phase that is other than a solid solution phase of chromium and trinickel tin (Ni3Sn) and that has a chromium content ratio of less than 1.5% by mass.Type: GrantFiled: February 20, 2015Date of Patent: November 13, 2018Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC TOYAMA CO., LTD.Inventors: Kazuki Okuno, Masahiro Kato, Tomoyuki Awazu, Masatoshi Majima, Kengo Tsukamoto, Hitoshi Tsuchida, Hidetoshi Saito