Patents by Inventor Yoshihiro Akasaka

Yoshihiro Akasaka 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).

  • Publication number: 20160036048
    Abstract: According to one embodiment, there is provided a composite. The composite includes a graphene sheet material, active material particles, and a carbon layer located between the graphene sheet material and the active material particles. The graphene sheet material includes at least one of a planar graphene sheet of a monoatomic layer and a laminate of 10 layers or less of the planar graphene sheets. The active material particles include a titanium-niobium composite oxide. The carbon layer includes a carbon material having a n-electron system.
    Type: Application
    Filed: March 17, 2015
    Publication date: February 4, 2016
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Katsuyuki NAITO, Yasuhiro HARADA, Norihiro YOSHINAGA, Yoshihiro AKASAKA, Yorikazu YOSHIDA, Kazuki ISE
  • Publication number: 20160027935
    Abstract: A method for producing a stacked electrode of an embodiment includes preparing a multi-layered graphene film, applying a dispersion liquid of metal nanowires onto the multi-layered graphene film, and removing a solvent from the dispersion liquid to prepare a metal wiring on the multi-layered graphene film.
    Type: Application
    Filed: October 5, 2015
    Publication date: January 28, 2016
    Inventors: Katsuyuki Naito, Eishi Tsutsumi, Norihiro Yoshinaga, Yoshihiro Akasaka
  • Publication number: 20150333322
    Abstract: According to one embodiment, there is provided a composite. The composite includes active material particles of a titanium composite oxide or oxide of titanium, and a graphene structure including a carbon material. The carbon material has a graphene framework defining a graphene surface. The graphene structure is located in between the active material particles. The graphene structure has at least one side surface in contact with the active material particle. The side surface includes the carbon material whose graphene surface is slanted relative to the side surface.
    Type: Application
    Filed: March 17, 2015
    Publication date: November 19, 2015
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Katsuyuki NAITO, Yasuhiro Harada, Norihiro Yoshinaga, Yoshihiro Akasaka
  • Publication number: 20150333321
    Abstract: According to one embodiment, there is provided a composite. The composite includes active material particles of a titanium composite oxide or oxide of titanium, and a graphene structure including a carbon material. The carbon material has a graphene framework defining a graphene surface. The graphene structure is located in between the active material particles. The graphene structure has at least one side surface in contact with the active material particle. The side surface includes the carbon material whose graphene surface is slanted relative to the side surface.
    Type: Application
    Filed: March 17, 2015
    Publication date: November 19, 2015
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Katsuyuki NAITO, Yasuhiro HARADA, Norihiro YOSHINAGA, Yoshihiro AKASAKA
  • Patent number: 9165696
    Abstract: According to one embodiment, the transparent electrode laminate includes a transparent substrate and an electrode layer which is formed on the transparent substrate and includes a three-dimensional network of metal nanowires. The electrode layer includes a first conductive region and a second conductive region adjacent to the first conductive region. Surfaces of the metal nanowires in the first conductive region are reacted to form reaction products. Surfaces of the metal nanowires in the second conductive region are unreacted. The second region has conductivity higher than that of the first conductive region and an optical transparency.
    Type: Grant
    Filed: September 18, 2012
    Date of Patent: October 20, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Katsuyuki Naito, Eishi Tsutsumi, Norihiro Yoshinaga, Yoshihiro Akasaka
  • Patent number: 9159463
    Abstract: According to one embodiment, a conductive material includes a carbon substance and a metallic substance mixed with and/or laminated to the carbon substance. The carbon substance has at least one dimension of 200 nm or less. The carbon substance includes a graphene selected from single-layered graphene and multi-layered graphene, a part of carbon atoms constituting the graphene is substituted with a nitrogen atom. The metallic substance includes at least one of a metallic particle and a metallic wire.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: October 13, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Katsuyuki Naito, Norihiro Yoshinaga, Yoshihiko Nakano, Yoshihiro Akasaka, Shigeru Matake
  • Publication number: 20150262724
    Abstract: According to one embodiment, a method of manufacturing a transparent conductor is provided. In the method, a silver nanowire layer including a plurality of silver nanowires and having openings is formed on a graphene film supported by a copper support. Then, a transparent resin layer insoluble in a copper-etching solution is formed on the silver nanowire layer such that the transparent resin layer contacts the graphene film through the openings. The copper support is then brought into contact with the non-acidic copper-etching solution to remove the copper support, thereby exposing the graphene film.
    Type: Application
    Filed: March 13, 2015
    Publication date: September 17, 2015
    Inventors: Katsuyuki Naito, Yoshihiro Akasaka, Tianyi Yang, Norihiro Yoshinaga
  • Publication number: 20150257258
    Abstract: According to one embodiment, a transparent conductor includes a transparent substrate; a metal nanowire layer disposed on the transparent substrate and including a plurality of metal nanowires; a graphene oxide layer covering the metal nanowire layer; and an electrical insulating resin layer disposed in contact with the graphene oxide layer.
    Type: Application
    Filed: March 5, 2015
    Publication date: September 10, 2015
    Inventors: Katsuyuki NAITO, Norihiro YOSHINAGA, Tianyi YANG, Yoshihiro AKASAKA
  • Publication number: 20140339097
    Abstract: An electrolysis device of an embodiment includes: an anode, a cathode having a nitrogen-containing carbon alloy catalyst, and an electrolysis cell having a membrane electrode assembly composed of an electrolyte present between the anode and the cathode so that voltage is applied to the anode and the cathode, wherein the electrolyte is any one of acidic, neutral, or alkali, water is produced by the electrolysis device at the cathode, when the electrolyte is acidic, and hydroxide ion is produced by the electrolysis device at the anode, when the electrolyte is neutral or alkali.
    Type: Application
    Filed: August 7, 2014
    Publication date: November 20, 2014
    Inventors: Norihiro YOSHINAGA, Yoshihiko NAKANO, Norihiro TOMIMATSU, Yoshihiro AKASAKA
  • Publication number: 20140295179
    Abstract: According to one embodiment, the transparent conductive film contains a laminated structure including a conductive layer and a transparent polymer layer. The conductive layer contains a metal nanowire and a carbon material including grapheme. The transparent polymer layer contains a transparent polymer having a glass transition temperature of 100° C. or less. The carbon material constitutes one surface of the transparent conductive film.
    Type: Application
    Filed: February 27, 2014
    Publication date: October 2, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Katsuyuki NAITO, Norihiro YOSHINAGA, Yoshihiro AKASAKA, Tomio ONO
  • Publication number: 20140284306
    Abstract: A pattern forming material contains a block copolymer or graft copolymer and forms a structure having micro polymer phases, in which, with respect to at least two polymer chains among polymer chains constituting the block copolymer or graft copolymer, the ratio between N/(Nc?No) values of monomer units constituting respective polymer chains is 1.4 or more, where N represents total number of atoms in the monomer unit, Nc represents the number of carbon atoms in the monomer unit, No represents the number of oxygen atoms in the monomer unit.
    Type: Application
    Filed: June 4, 2014
    Publication date: September 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koji ASAKAWA, Toshiro HIRAOKA, Yoshihiro AKASAKA, Yasuyuki HOTTA
  • Patent number: 8778201
    Abstract: A pattern forming material contains a block copolymer or graft copolymer and forms a structure having micro polymer phases, in which, with respect to at least two polymer chains among polymer chains constituting the block copolymer or graft copolymer, the ratio between N/(Nc?No) values of monomer units constituting respective polymer chains is 1.4 or more, where N represents total number of atoms in the monomer unit, Nc represents the number of carbon atoms in the monomer unit, No represents the number of oxygen atoms in the monomer unit.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: July 15, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koji Asakawa, Toshiro Hiraoka, Yoshihiro Akasaka, Yasuyuki Hotta
  • Publication number: 20140134521
    Abstract: A carbon material of an embodiment includes: a columnar structure in which a carbon compound having a graphene skeleton is laminated, the graphene skeleton whose some of carbon atoms are substituted with nitrogen atoms. In the carbon material, a graphene skeleton surface of the carbon compound is inclined at an angle of 5 degrees or more and 80 degrees or less with respect to a column axial direction of the columnar structure.
    Type: Application
    Filed: November 12, 2013
    Publication date: May 15, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Katsuyuki NAITO, Norihiro YOSHINAGA, Shigeru MATAKE, Yoshihiro AKASAKA
  • Patent number: 8597856
    Abstract: A direct methanol fuel cell includes a cathode catalyst layer; an electrolyte membrane; an anode catalyst layer; a first fuel control layer that is water-repellent and conductive and that has pores; a second fuel control layer that is water-repellent and conductive and that has larger pores than the those of the first fuel control layer; a third fuel control layer that is water-repellent and conductive and that has smaller porous than those of the first fuel control layer and those of the second fuel control layer; and an anode GDL layer that is water-repellent and conductive, wherein the membrane and the layers above are arranged in the above order.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: December 3, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiro Akasaka, Masato Akita, Ryosuke Yagi, Hiroyasu Sumino, Kazuhiro Yasuda, Taishi Fukazawa
  • Publication number: 20130255764
    Abstract: A stacked electrode of an embodiment includes: a multi-layered graphene film and a metal wiring formed thereon, wherein the metal wiring contains randomly oriented metal nanowires, the multi-layered graphene film contains a laminate of graphene sheets, the graphene sheets each contain an aggregate of graphene plates, and the graphene plates have an average area of (A+B)2 nm2 or more, wherein A (nm) represents the average diameter of the metal nanowires, B (nm) satisfies the equation (1) of B2/(A+B)2=(1?X), and X represents the ratio of the area of the metal nanowires projected in the stacking direction of the stacked electrode.
    Type: Application
    Filed: February 20, 2013
    Publication date: October 3, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Katsuyuki Naito, Eishi Tsutsumi, Norihiro Yoshinaga, Yoshihiro Akasaka
  • Publication number: 20130255763
    Abstract: A carbon electrode of an embodiment includes: a graphene having a graphene skeleton, carbon atoms in the graphene skeleton being partially substituted by a nitrogen atom, wherein the graphene contains an oxygen atom, and the carbon electrode is doped with a cation.
    Type: Application
    Filed: February 20, 2013
    Publication date: October 3, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Katsuyuki Naito, Norihiro Yoshinaga, Shigeru Matake, Yoshihiro Akasaka, Takashi Yoshida
  • Publication number: 20130260286
    Abstract: An oxygen reduction catalyst of an embodiment includes: a stack of single-layer graphenes; and a phosphorus compound, wherein some of carbon atoms of the graphenes are replaced by nitrogen atoms, and the phosphorus compound has a peak of phosphorus 2p orbital of 133.0 to 134.5 eV in X-ray photoelectron spectrum.
    Type: Application
    Filed: February 20, 2013
    Publication date: October 3, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Katsuyuki Naito, Yoshihiko Nakano, Norihiro Yoshinaga, Shigeru Matake, Yoshihiro Akasaka
  • Publication number: 20130252132
    Abstract: According to one embodiment, the noble metal catalyst layer includes first noble metal layer and a second noble metal layer formed on the first noble metal layer. The first noble metal layer includes a first noble metal element and has a porosity of 65 to 95 vol. %, a volume of pores having a diameter of 5 to 80 nm accounts for 50% or more of a volume of total pores in the first noble metal layer. The second noble metal layer includes a second noble metal element, and has an average thickness of 3 to 20 nm and a porosity of 50 vol. % or less.
    Type: Application
    Filed: March 26, 2013
    Publication date: September 26, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Wu MEI, Shigeru Matake, Taishi Fukazawa, Yoshihiro Akasaka, Katsuyuki Naito
  • Patent number: 8481224
    Abstract: According to one embodiment, an anode for a direct methanol fuel cell includes an anode catalyst layer containing a noble metal catalyst and a proton-conductive polyelectrolyte. A log differential pore volume distribution curve measured by a mercury intrusion porosimetry of the anode catalyst layer has a peak within a pore diameter range of 0.06 to 0.3 ?m and satisfies the following relationship: 0.5?(V1/V0)?0.9 wherein V0 is a cumulative pore volume of pores having a diameter of from 0.02 to 1 ?m, as measured by a mercury intrusion porosimetry, and V1 is a cumulative pore volume of pores having a diameter of from 0.02 to 0.2 ?m, as measured by a mercury intrusion porosimetry.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: July 9, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Taishi Fukazawa, Yoshihiro Akasaka, Jungmin Song
  • Patent number: 8435416
    Abstract: A pattern forming material contains a block copolymer or graft copolymer and forms a structure having micro polymer phases, in which, with respect to at least two polymer chains among polymer chains constituting the block copolymer or graft copolymer, the ratio between N/(Nc-No) values of monomer units constituting respective polymer chains is 1.4 or more, where N represents total number of atoms in the monomer unit, Nc represents the number of carbon atoms in the monomer unit, No represents the number of oxygen atoms in the monomer unit.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: May 7, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koji Asakawa, Toshiro Hiraoka, Yoshihiro Akasaka, Yasuyuki Hotta