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: 20240150910Abstract: Provided is a surface-coated metal porous body having a three-dimensional network structure, the surface-coated metal porous body including: a framework forming the three-dimensional network structure; and a coating film provided on a surface of the framework, wherein the framework has a body including a metal element as a constituent element, the coating film includes a scale-like carbon material and a fine-grained conductive material, a distance D between two points that are farthest from each other on an outer perimeter of a main surface of the scale-like carbon material is 5% or more and 120% or less relative to a thickness of the framework, and the scale-like carbon material is deposited on the surface of the framework.Type: ApplicationFiled: June 25, 2020Publication date: May 9, 2024Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC TOYAMA CO., LTD.Inventors: Kazuki OKUNO, Masatoshi MAJIMA, Hitoshi TSUCHIDA
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Patent number: 11949111Abstract: In a lithium ion secondary battery (1), a positive electrode (2) and a negative electrode (3) are alternately adjacent to each other via separators (4) and (5). The positive electrode (2) includes a positive electrode current collector composed of a metal porous body, a first positive electrode active material (21) held on one side of the positive electrode current collector, and a second positive electrode active material (22) held on the other side. The negative electrode (3) includes a negative electrode current collector composed of a metal porous body, a first negative electrode active material (31) held on one side of the negative electrode current collector, and a second negative electrode active material (32) held on the other side. The first positive electrode active material (21) faces the first negative electrode active material (31), and the positive electrode active material (22) faces the second negative electrode active material (32).Type: GrantFiled: May 9, 2019Date of Patent: April 2, 2024Assignees: HONDA MOTOR CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kiyoshi Tanaami, Akihisa Tanaka, Shintaro Aoyagi, Kazuki Okuno, Akihisa Hosoe, Kikuo Senoo, Hiroshi Takebayashi
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Patent number: 11757106Abstract: A porous body includes a framework having a three-dimensional network structure, the framework having a body including crystal grains including nickel and cobalt as constituent elements, the cobalt having a proportion in mass of 0.2 or more and 0.8 or less with respect to a total mass of the nickel and the cobalt, the crystal grains having a shorter grain diameter of 2 ?m or more, as determined in a first observed image obtained by observing the body of the framework in cross section at a magnification of 200 times.Type: GrantFiled: December 24, 2019Date of Patent: September 12, 2023Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Koma Numata, Masatoshi Majima, Mitsuyasu Ogawa, Kazuki Okuno, Naho Mizuhara, Ryoko Kanda
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Publication number: 20230099013Abstract: A porous body includes a framework having a three-dimensional network structure, the framework having a body including crystal grains including nickel and cobalt as constituent elements, the cobalt having a proportion in mass of 0.2 or more and 0.8 or less with respect to a total mass of the nickel and the cobalt, the crystal grains having a shorter grain diameter of 2 ?m or more, as determined in a first observed image obtained by observing the body of the framework in cross section at a magnification of 200 times.Type: ApplicationFiled: December 24, 2019Publication date: March 30, 2023Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Koma NUMATA, Masatoshi MAJIMA, Mitsuyasu OGAWA, Kazuki OKUNO, Naho MIZUHARA, Ryoko KANDA
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Publication number: 20230080341Abstract: A metal porous body sheet includes a metal porous body having a three-dimensional mesh structure and has a first main surface and a second main surface that is a reverse surface to the first main surface. The first main surface is formed with multiple holes extending from the first main surface toward the second main surface along a first direction.Type: ApplicationFiled: January 21, 2021Publication date: March 16, 2023Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takahiro HIGASHINO, Kazuki OKUNO, Hiromasa TAWARAYAMA, Masatoshi MAJIMA, Soichiro OKUMURA
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Publication number: 20220416255Abstract: A porous body including a framework having a three-dimensional network structure, the framework having a body including nickel, cobalt, a first element and a second element as constituent elements, the cobalt having a proportion in mass of 0.2 or more and 0.8 or less relative to a total mass of the nickel and the cobalt, the first element including of at least one element selected from the group including of boron, iron and calcium, the second element including of at least one element selected from the group consisting of sodium, magnesium, aluminum, silicon, potassium, titanium, chromium, copper, zinc and tin, the first and second elements together having a proportion in mass of 5 ppm or more and 50,000 ppm or less in total relative to the body of the framework.Type: ApplicationFiled: December 9, 2020Publication date: December 29, 2022Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Ryoko KANDA, Masatoshi MAJIMA, Mitsuyasu OGAWA, Kazuki OKUNO, Koma NUMATA, Yohei NODA
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Patent number: 11466343Abstract: 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: GrantFiled: December 6, 2018Date of Patent: October 11, 2022Assignees: 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: 20220238891Abstract: Provided is an electrode including: a current, collector; an electrode material mixture; and an electrode tab, the current collector being a porous metal body having a region A and a region B with a porosity lower than that of the region A, the region A having pores filled with the electrode material mixture, the electrode tab being fixed on the region B, the region A having a subregion A1 and a subregion A2 with a porosity lower than that of the subregion A1, the subregion A2 being more distant from the electrode tab than the subregion A1. Also provided is an electricity storage device including the electrode.Type: ApplicationFiled: January 13, 2022Publication date: July 28, 2022Inventors: Kiyoshi TANAAMI, Toshimitsu TANAKA, Yuji ISOGAI, Kazuki OKUNO, Akihisa HOSOE, Hiroshi TAKEBAYASHI
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Patent number: 11380946Abstract: 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: GrantFiled: September 13, 2018Date of Patent: July 5, 2022Assignees: 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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Patent number: 11271215Abstract: 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: GrantFiled: July 11, 2018Date of Patent: March 8, 2022Assignees: 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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Patent number: 11228043Abstract: 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: August 31, 2020Date of Patent: January 18, 2022Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazuki Okuno, Takahiro Higashino, Masatoshi Majima, Tomoyuki Awazu
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Patent number: 11189830Abstract: 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: GrantFiled: March 8, 2018Date of Patent: November 30, 2021Assignees: Sumitomo Electric Industries, Ltd., Tokyo Denki UniversityInventors: Koji Nitta, Shoichiro Sakai, Atsushi Fukunaga, Kazuki Okuno, Naoaki Yabuuchi
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Publication number: 20210313574Abstract: Provided is a negative electrode for a lithium ion secondary battery capable of obtaining a lithium ion secondary battery having a high capacity and excellent charge-and-discharge cycle characteristics. A negative electrode for a lithium ion secondary battery (1) includes: a current collector (3) composed of a metal porous body having a three-dimensional network structure (2); and a negative electrode active material (4) held on the current collector (3). An overcoat layer (5) covering an outer surface of the current collector (3) is included, and the overcoat layer (5) includes hard carbon.Type: ApplicationFiled: May 9, 2019Publication date: October 7, 2021Applicants: HONDA MOTOR CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kiyoshi Tanaami, Akihisa Tanaka, Shintaro Aoyagi, Kazuki Okuno, Akihisa Hosoe, Kikuo Senoo, Hiroshi Takebayashi
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Publication number: 20210249666Abstract: A metal porous body includes a flat plate shape and having continuous pores, a framework of the metal porous body including an alloy layer containing nickel and at least one of chromium and tin, a cobalt layer being formed on a surface of the alloy layer.Type: ApplicationFiled: June 22, 2018Publication date: August 12, 2021Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Koma NUMATA, Masatoshi MAJIMA, Tomoyuki AWAZU, Kazuki OKUNO, Chihiro HIRAIWA
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Publication number: 20210119229Abstract: A metal porous sheet includes a metal porous body having a skeleton with a three-dimensional network structure, and has a main surface in which a trench is formed. A depth of the trench is more than or equal to 10 percent of a thickness of the metal porous sheet. An area of the trench is more than or equal to 10 percent of an area of the main surface in a plan view.Type: ApplicationFiled: April 6, 2020Publication date: April 22, 2021Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Koma NUMATA, Masatoshi MAJIMA, Mitsuyasu OGAWA, Takahiro HIGASHINO, Kazuki OKUNO, Hiromasa TAWARAYAMA
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Publication number: 20210119202Abstract: Provided is a lithium ion secondary battery electrode allowing excellent charge-and-discharge cycle characteristics to be obtained when used in a lithium ion secondary battery. The lithium ion secondary battery electrode includes a current collector composed of a metal porous body having a three-dimensional network structure in which columnar skeletons are three-dimensionally connected, a first active material held on one side of the current collector, and a second active material held on the other side of the current collector.Type: ApplicationFiled: May 8, 2019Publication date: April 22, 2021Applicants: HONDA MOTOR CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kiyoshi Tanaami, Akihisa Tanaka, Shintaro Aoyagi, Kazuki Okuno, Akihisa Hosoe, Kikuo Senoo, Hiroshi Takebayashi
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Publication number: 20210111398Abstract: To provide an electrode for lithium ion secondary batteries, and a lithium ion secondary battery made using this electrode for lithium ion secondary batteries, which can suppress an increase in electron resistance of a current collector area, and improve heat dissipation, in an electrode for lithium ion secondary batteries establishing a foam metal body as the collector. In the electrode for lithium ion secondary batteries made using a foam porous body consisting of metal as a current collector, the electrode shape is rectangular, and a current collector region is made to span at least two adjacent sides.Type: ApplicationFiled: October 15, 2020Publication date: April 15, 2021Inventors: Kiyoshi TANAAMI, Yuji ISOGAI, Shintaro AOYAGI, Hideki SAKAI, Kazuki OKUNO, Akihisa HOSOE, Kikuo SENOO, Hiroshi TAKEBAYASHI
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Publication number: 20210111411Abstract: To provide an electrode for lithium ion secondary batteries, and a lithium ion secondary battery made using this electrode for lithium ion secondary batteries, which can sufficiently secure electron conductivity between a foam metal body and an electrode active material in an electrode for lithium ion secondary batteries which establish a foam metal body as the collector, reduce the resistance of a lithium ion secondary batter, and improve the durability. A carbon layer consisting of carbon material is disposed on a surface of a foam porous body consisting of metal, and used as a collector. More specifically, an electrode for lithium ion secondary batteries includes a collector, and an electrode mixture filled into the collector, in which the collector is made to have a carbon layer consisting of carbon material on a surface of a foam porous body consisting of metal.Type: ApplicationFiled: October 13, 2020Publication date: April 15, 2021Inventors: Kiyoshi TANAAMI, Yuji ISOGAI, Shintaro AOYAGI, Hideki SAKAI, Kazuki OKUNO, Akihisa HOSOE, Kikuo SENOO, Hiroshi TAKEBAYASHI
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Publication number: 20210075020Abstract: In a lithium ion secondary battery (1), a positive electrode (2) and a negative electrode (3) are alternately adjacent to each other via separators (4) and (5). The positive electrode (2) includes a positive electrode current collector composed of a metal porous body, a first positive electrode active material (21) held on one side of the positive electrode current collector, and a second positive electrode active material (22) held on the other side. The negative electrode (3) includes a negative electrode current collector composed of a metal porous body, a first negative electrode active material (31) held on one side of the negative electrode current collector, and a second negative electrode active material (32) held on the other side. The first positive electrode active material (21) faces the first negative electrode active material (31), and the positive electrode active material (22) faces the second negative electrode active material (32).Type: ApplicationFiled: May 9, 2019Publication date: March 11, 2021Applicants: HONDA MOTOR CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kiyoshi Tanaami, Akihisa Tanaka, Shintaro Aoyagi, Kazuki Okuno, Akihisa Hosoe, Kikuo Senoo, Hiroshi Takebayashi
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Publication number: 20200403252Abstract: 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: August 31, 2020Publication date: December 24, 2020Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazuki OKUNO, Takahiro HIGASHINO, Masatoshi MAJIMA, Tomoyuki AWAZU