Patents by Inventor Taishi Fukazawa

Taishi Fukazawa 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).

  • Patent number: 10535888
    Abstract: A membrane electrode assembly of an embodiment includes: a first electrode having a first base, and a first catalyst layer provided on the first base, the first catalyst layer including a plurality of first catalyst units with a laminated structure, and the laminated structure including void layers; and an electrolyte membrane being in direct contact with both first surfaces of the first catalyst units facing each other among the first catalyst units, and second surfaces of the first catalyst units on the opposite side from the first base side. A portion is included where the electrolyte membrane exists over a region being at least 80% of a thickness of the first catalyst layer from the second surfaces of the first catalyst units toward the first base.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: January 14, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiko Nakano, Wu Mei, Taishi Fukazawa, Yuta Kanai, Hiroki Hiraga
  • Patent number: 10529554
    Abstract: A method for fabricating a layer structure in a trench includes: simultaneously forming a dielectric film containing a Si—N bond on an upper surface, and a bottom surface and sidewalls of the trench, wherein a top/bottom portion of the film formed on the upper surface and the bottom surface and a sidewall portion of the film formed on the sidewalls are given different chemical resistance properties by bombardment of a plasma excited by applying voltage between two electrodes between which the substrate is place in parallel to the two electrodes; and substantially removing either one of but not both of the top/bottom portion and the sidewall portion of the film by wet etching which removes the one of the top/bottom portion and the sidewall portion of the film more predominantly than the other according to the different chemical resistance properties.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: January 7, 2020
    Assignee: ASM IP Holding B.V.
    Inventors: Dai Ishikawa, Atsuki Fukazawa, Eiichiro Shiba, Shinya Ueda, Taishi Ebisudani, SeungJu Chun, YongMin Yoo, YoonKi Min, SeYong Kim, JongWan Choi
  • Publication number: 20190296364
    Abstract: A laminated electrolyte membrane of an embodiment includes: a first electrolyte membrane; a second electrolyte membrane; and a nanosheet laminated catalyst layer provided between the first electrolyte membrane and the second electrolyte membrane and including a laminated structure in which a plurality of nanosheet catalysts is laminated with a gap.
    Type: Application
    Filed: September 12, 2018
    Publication date: September 26, 2019
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiko NAKANO, Norihiro YOSHINAGA, Wu MEI, Taishi FUKAZAWA
  • Patent number: 10249898
    Abstract: In one embodiment, a membrane electrode assembly comprises a catalyst layer being porous and containing a catalyst material, the catalyst layer comprising a plurality of catalyst units each having a porous body structure or a laminated structure containing a void layer, and an electrolyte membrane adjacent to the porous catalyst layer. The catalyst unit bites into the electrolyte membrane, and an average biting ratio is not less than 10%, and not more than 80% of a thickness of the catalyst layer.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: April 2, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wu Mei, Taishi Fukazawa, Tianyi Yang
  • Publication number: 20190088967
    Abstract: An electrode of an embodiment includes a catalyst layer having pores. A mode diameter of the pores is 10 ?m or more and 100 ?m or less.
    Type: Application
    Filed: February 28, 2018
    Publication date: March 21, 2019
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Taishi Fukazawa, Wu Mei, Yuta Kanai
  • Publication number: 20180277871
    Abstract: A membrane electrode assembly of an embodiment includes: a first electrode having a first base, and a first catalyst layer provided on the first base, the first catalyst layer including a plurality of first catalyst units with a laminated structure, and the laminated structure including void layers; and an electrolyte membrane being in direct contact with both first surfaces of the first catalyst units facing each other among the first catalyst units , and second surfaces of the first catalyst units on the opposite side from the first base side. A portion is included where the electrolyte membrane exists over a region being at least 80% of a thickness of the first catalyst layer from the second surfaces of the first catalyst units toward the first base.
    Type: Application
    Filed: September 15, 2017
    Publication date: September 27, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiko Nakano, Wu Mei, Taishi Fukazawa, Yuta Kanai, Hiroki Hiraga
  • Publication number: 20180083299
    Abstract: A fuel cell driving method of an embodiment includes applying a voltage with a potential cycle including repetitions of low potential and high potential by use of a power supply connected to an anode and a cathode of a membrane electrode assembly having the anode, an electrolyte membrane, and the cathode. The low potential is 0.85 V or less for the cathode with reference to a potential of the anode. The high potential is 1.10 V or more for the cathode with reference to a potential of the anode.
    Type: Application
    Filed: February 22, 2017
    Publication date: March 22, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Wu MEI, Taishi FUKAZAWA, Yuta KANAI
  • Patent number: 9865882
    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: Grant
    Filed: March 26, 2013
    Date of Patent: January 9, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wu Mei, Shigeru Matake, Taishi Fukazawa, Yoshihiro Akasaka, Katsuyuki Naito
  • Patent number: 9793549
    Abstract: According to one embodiment, a catalyst-supporting substrate comprises a substrate and a catalyst layer including a plurality of pores, the catalyst layer being supported on the substrate. The average diameter of the section of the pore when the catalyst is cut in the thickness direction of the thickness is 5 nm to 400 nm, and the long-side to short-side ratio of the pore on the section is 1:1 to 10:1 in average.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: October 17, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Taishi Fukazawa, Wu Mei, Yoshihiro Akasaka, Norihiro Yoshinaga
  • Patent number: 9777382
    Abstract: According to one embodiment, an electrochemical cell includes an anode, a cathode and an electrolytic membrane interposed therebetween. At least one of the anode and the cathode is formed of an integral solid conductive plate and includes a first surface in contact with the electrolytic membrane and a second surface apart from the first surface in a thickness direction. The at least one of the anode and the cathode includes a plurality of first pores opened in the first surface and a plurality of second pores opened in the second surface, the second pores communicating with a part of the first pores. The first pores are smaller than the second pores, and the concentration of pores in the first surface is higher than that in the second surface.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: October 3, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Norihiro Yoshinaga, Hiroaki Hirazawa, Yoshihiro Akasaka, Katsuyuki Naito, Taishi Fukazawa, Jun Tamura, Ryosuke Yagi
  • Publication number: 20170077539
    Abstract: In one embodiment, a membrane electrode assembly comprises a catalyst layer being porous and containing a catalyst material, the catalyst layer comprising a plurality of catalyst units each having a porous body structure or a laminated structure containing a void layer, and an electrolyte membrane adjacent to the porous catalyst layer. The catalyst unit bites into the electrolyte membrane, and an average biting ratio is not less than 10%, and not more than 80% of a thickness of the catalyst layer.
    Type: Application
    Filed: August 19, 2016
    Publication date: March 16, 2017
    Inventors: Wu MEI, Taishi FUKAZAWA, Tianyi YANG
  • Publication number: 20160355934
    Abstract: According to one embodiment, an electrochemical cell includes an anode, a cathode and an electrolytic membrane interposed therebetween. At least one of the anode and the cathode is formed of an integral solid conductive plate and includes a first surface in contact with the electrolytic membrane and a second surface apart from the first surface in a thickness direction. The at least one of the anode and the cathode includes a plurality of first pores opened in the first surface and a plurality of second pores opened in the second surface, the second pores communicating with a part of the first pores. The first pores are smaller than the second pores, and the concentration of pores in the first surface is higher than that in the second surface.
    Type: Application
    Filed: June 3, 2015
    Publication date: December 8, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Norihiro YOSHINAGA, Hiroaki HIRAZAWA, Yoshihiro AKASAKA, Katsuyuki NAITO, Taishi FUKAZAWA, Jun TAMURA, Ryosuke YAGI
  • Publication number: 20160301081
    Abstract: According to an embodiment, a porous catalyst layer includes a metal portion including plural noble metal-including sheets stacked apart from each other, and a porous nanocarbon layer disposed between two adjacent noble metal-including sheets. The plural noble metal-including sheets in the metal portion have an integrated portion. The porous nanocarbon layer includes fibrous nanocarbon.
    Type: Application
    Filed: June 16, 2016
    Publication date: October 13, 2016
    Inventors: Wu MEI, Shigeru MATAKE, Taishi FUKAZAWA, Yoshihiro AKASAKA
  • Publication number: 20160285116
    Abstract: An electrode for a fuel cell according to an embodiment of an embodiment includes: a catalyst layer having a noble metal catalyst unit that has a porous structure or a layer-by-layer structure including void layers and a hydrophilic material; a porous water management layer arranged adjacent to the catalyst layer and including a hydrophilic material and a conductive material; and a gas diffusion layer arranged adjacent to the porous water management layer, where a size of the noble metal catalyst unit is equal to or more than 0.05 ?m and equal to or less than 2 ?m, the porosity of the porous water management layer is equal to or more than 30 vol % and equal to or less than 85 vol %, and the hydrophilicity thereof is equal to or more than 0.05 and equal to or less than 1.
    Type: Application
    Filed: February 24, 2016
    Publication date: September 29, 2016
    Inventors: Tianyi YANG, Wu MEI, Taishi FUKAZAWA
  • Patent number: 9406941
    Abstract: A catalyst layer includes a layered structure. The layered structure is laminated with sheet-like unit catalysts and pore layers. The sheet-like unit catalysts have mean thicknesses of 4 to 30 nm. The pore layers are sandwiched between the sheet-like unit catalysts.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: August 2, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wu Mei, Taishi Fukazawa, Yoshihiro Akasaka
  • Publication number: 20160141631
    Abstract: A method of manufacturing a membrane electrode assembly, including: forming a catalyst layer precursor containing a mixture of a catalyst material and a pore-forming material on a substrate having a flatness of 60% or more; removing the pore-forming material from the catalyst layer precursor on the substrate, thereby forming a catalyst layer containing the catalyst material and having a porosity of 20 to 90% by volume; transferring the catalyst layer from the substrate to a gas diffusion layer, to provide an electrode; and bonding the catalyst layer of the electrode to an electrolyte membrane, to provide a membrane electrode assembly.
    Type: Application
    Filed: January 21, 2016
    Publication date: May 19, 2016
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Wu Mei, Shigeru Matake, Taishi Fukazawa, Yoshihiro Akasaka, Katsuyuki Naito
  • Publication number: 20160087282
    Abstract: Embodiments of the present disclosure aim to provide a catalyst layer ensuring a high cell voltage and having both excellent robustness and sufficient endurance, and also to provide a process for producing the layer, a membrane electrode assembly and an electrochemical cell.
    Type: Application
    Filed: September 10, 2015
    Publication date: March 24, 2016
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Wu MEI, Shigeru MATAKE, Taishi FUKAZAWA, Yoshihiro AKASAKA
  • Patent number: 9276269
    Abstract: A catalyst layer containing a catalyst material, the catalyst layer having a porosity of 20 to 90% by vol and satisfying a relation: R1?R0×1.2, wherein R1 is an alignment ratio of the catalyst layer; and R0 is an alignment ratio of the catalyst material in powder form having a random crystalline plane distribution, and each of the alignment ratios is calculated from a X-ray diffraction spectrum having a diffraction angle 2? range from 10 to 90 degree measured using Cu-K?-rays.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: March 1, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Wu Mei, Shigeru Matake, Taishi Fukazawa, Yoshihiro Akasaka, Katsuyuki Naito
  • 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: 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