Patents by Inventor Kazuki Arihara
Kazuki Arihara 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: 11075397Abstract: The bipolar secondary battery includes a power generation element including unit power generation elements stacked together and including bipolar electrodes stacked via separators, and current collecting plates arranged at both ends of the power generation element in the stacked direction of the unit power generation elements so as to be in contact with the power generation element, wherein the current collecting plates each include an electrically conductive layer and a resin film, the electrically conductive layer being formed on the resin film having a thermal shrinkage percentage of 2% or greater at a temperature of 150° C., and the separators have a higher thermal shrinkage start temperature than the resin films.Type: GrantFiled: April 26, 2018Date of Patent: July 27, 2021Assignee: NISSAN MOTOR CO., LTD.Inventors: Gentaro Kano, Kazuki Arihara, Atsushi Horai, Eiji Minegishi, Takashi Mori, Yusuke Emori, Yusuke Nakashima
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Patent number: 11063327Abstract: A secondary battery is provided with a power generation element, an electroconductive member, an external short circuit, a current detector and an external discharge safety circuit. The power generation element has a unit cell layer that includes a positive electrode, a separator and a negative electrode stacked in that order. The electroconductive member is disposed on one outward side of the power generation element with an insulation member interposed therebetween. A lead wire connects the electroconductive member with the negative electrode tab. The current detector detects whether or not current is flowing to the lead wire. The external discharge safety circuit is provided to short-circuits a path between the positive electrode tab and the negative electrode tab outside the power generation element while current detector detects a current.Type: GrantFiled: March 3, 2017Date of Patent: July 13, 2021Assignee: Nissan Motor Co., Ltd.Inventors: Gentaro Kano, Atsushi Horai, Kazuki Arihara, Hajime Satou, Yasuhiko Ohsawa, Ryoichi Senbokuya, Maki Chumon, Eiji Minegishi
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Publication number: 20200388875Abstract: The bipolar secondary battery includes a power generation element including unit power generation elements stacked together and including bipolar electrodes stacked via separators, and current collecting plates arranged at both ends of the power generation element in the stacked direction of the unit power generation elements so as to be in contact with the power generation element, wherein the current collecting plates each include an electrically conductive layer and a resin film, the electrically conductive layer being formed on the resin film having a thermal shrinkage percentage of 2% or greater at a temperature of 150° C., and the separators have a higher thermal shrinkage start temperature than the resin films.Type: ApplicationFiled: April 26, 2018Publication date: December 10, 2020Applicant: NISSAN MOTOR CO., LTD.Inventors: Gentaro KANO, Kazuki ARIHARA, Atsushi HORAI, Eiji MINEGISHI, Takashi MORI, Yusuke EMORI, Yusuke NAKASHIMA
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Patent number: 10847811Abstract: An object is to provide a catalyst particle that can exhibit high activity. The catalyst particle is an alloy particle formed of platinum atom and a non-platinum metal atom, wherein (i) the alloy particle has an L12 structure as an internal structure and has an extent of ordering of L12 structure in the range of 30 to 100%, (ii) the alloy particle has an LP ratio calculated by CO stripping method of 10% or more, and (iii) the alloy particle has a dN/dA ratio in the range of 0.4 to 1.0.Type: GrantFiled: May 30, 2018Date of Patent: November 24, 2020Assignee: NISSAN MOTOR CO., LTD.Inventors: Kazuki Arihara, Hiroyuki Tanaka, Hisashi Mitsumoto, Takahiro Kaito, Seiho Sugawara, Tsukuru Ohwaki
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Patent number: 10686196Abstract: To provide catalyst particles that can exhibit high activity. Catalyst particles, which are alloy particles formed from platinum atoms and non-platinum metal atoms, each alloy particle having a main body that constitutes a granular form; and a plurality of protrusions protruding outward from the outer surface of the main body, in which the main body is formed from a non-platinum metal and platinum, the protrusions are formed from platinum as a main component, and the aspect ratio (diameter/length) of the protrusions is higher than 0 and lower than or equal to 2.Type: GrantFiled: August 27, 2015Date of Patent: June 16, 2020Assignee: NISSAN MOTOR CO., LTD.Inventors: Kazuki Arihara, Hiroyuki Tanaka
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Patent number: 10675611Abstract: Provided are a carbon powder which can provide a catalyst exhibiting high performance and a catalyst. A carbon powder for fuel cell comprising carbon as a main component, which has a ratio (B/A) of an area B of peak 1 to an area A of peak 0 of more than 0 and 0.15 or less, wherein the area A represents an area of peak 0 at a position of 2?=22.5° to 25° as observed by XRD analysis when the carbon powder for fuel cell is subjected to heat treatment at 1800° C. for 1 hour in an inert atmosphere, and the area B represents an area of peak 1 at a position of 2?=26° as observed by XRD analysis when the carbon powder for fuel cell is subjected to heat treatment at 1800° C. for 1 hour in an inert atmosphere.Type: GrantFiled: January 18, 2017Date of Patent: June 9, 2020Assignees: NISSAN MOTOR CO., LTD., TOYO TANSO CO., LTD.Inventors: Takehiko Okui, Hiroyuki Tanaka, Kazuki Arihara, Tetsuya Mashio, Atsushi Ohma, Takahiro Morishita, Yoshio Shodai
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Patent number: 10601050Abstract: An electrode for a cell includes a resin current collector that is planate and contains a resin and an electrically conductive filler, and an electrode active material layer that is disposed on at least one surface side of the resin current collector and that contains electrode active material particles. The resin current collector includes an electrically conductive layer on its surface side facing the electrode active material layer, the electrically conductive layer having configuration with recesses and projections. This configuration with recesses and projections satisfies the relationship given by formula (1): h/tan ?<D, in which h is the average height of the configuration with recesses and projections, ? is the average inclination angle of the configuration with recesses and projections, and D is the average particle diameter of the electrode active material particles. A cell includes the electrode for a cell described above.Type: GrantFiled: November 2, 2017Date of Patent: March 24, 2020Assignee: Nissan Motor Co., Ltd.Inventors: Kazuki Arihara, Takamasa Nakagawa, Hideaki Horie, Yuuki Kusachi, Masanori Koike, Masatoshi Okura
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Patent number: 10562018Abstract: Provided is a catalyst that can exhibit high activity. The catalyst is an electrode catalyst having catalytic metals supported on a catalyst support, in which the catalytic metals include platinum and a metal component other than platinum; the electrode catalyst has mesopores having a mode radius of pore distribution of mesopores having a radius of 1 nm or more, of 1 nm or more and less than 2.5 nm; alloy microparticles of platinum and the metal component other than platinum are supported inside the mesopores; and a molar content ratio of platinum with respect to the metal component other than platinum in the alloy microparticles supported inside the mesopores is 1.0 to 10.0.Type: GrantFiled: April 6, 2017Date of Patent: February 18, 2020Assignees: NISSAN MOTOR CO., LTD., TANAKA KIKINZOKU KOGYO K.K., NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.Inventors: Yoshinori Suzue, Kazuki Arihara, Tetsuya Mashio, Hiroyuki Tanaka, Katsuichiro Hayakawa, Koichi Matsutani, Hitoshi Nakajima
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Publication number: 20200028145Abstract: A secondary battery is provided with a power generation element, an electroconductive member, an external short circuit, a current detector and an external discharge safety circuit. The power generation element has a unit cell layer that includes a positive electrode, a separator and a negative electrode stacked in that order. The electroconductive member is disposed on one outward side of the power generation element with an insulation member interposed therebetween. A lead wire connects the electroconductive member with the negative electrode tab. The current detector detects whether or not current is flowing to the lead wire. The external discharge safety circuit is provided to short-circuits a path between the positive electrode tab and the negative electrode tab outside the power generation element while current detector detects a current.Type: ApplicationFiled: March 3, 2017Publication date: January 23, 2020Inventors: Gentaro KANO, Atsushi HORAI, Kazuki ARIHARA, Hajime SATOU, Yasuhiko OHSAWA, Ryoichi SENBOKUYA, Maki CHUMON, Eiji MINEGISHI
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Publication number: 20190336956Abstract: Provided is a catalyst that can exhibit high activity. The catalyst is an electrode catalyst having catalytic metals supported on a catalyst support, in which the catalytic metals include platinum and a metal component other than platinum; the electrode catalyst has mesopores having a mode radius of pore distribution of mesopores having a radius of 1 nm or more, of 1 nm or more and less than 2.5 nm; alloy microparticles of platinum and the metal component other than platinum are supported inside the mesopores; and a molar content ratio of platinum with respect to the metal component other than platinum in the alloy microparticles supported inside the mesopores is 1.0 to 10.0.Type: ApplicationFiled: April 6, 2017Publication date: November 7, 2019Applicants: NISSAN MOTOR CO., LTD., TANAKA KIKINZOKU KOGYO K.K., NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.Inventors: Yoshinori SUZUE, Kazuki ARIHARA, Tetsuya MASHIO, Hiroyuki TANAKA, Katsuichiro HAYAKAWA, Koichi MATSUTANI, Hitoshi NAKAJIMA
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Publication number: 20190288293Abstract: An electrode for a cell includes a resin current collector that is planate and contains a resin and an electrically conductive filler, and an electrode active material layer that is disposed on at least one surface side of the resin current collector and that contains electrode active material particles. The resin current collector includes an electrically conductive layer on its surface side facing the electrode active material layer, the electrically conductive layer having configuration with recesses and projections. This configuration with recesses and projections satisfies the relationship given by formula (1): h/tan ?<D, in which h is the average height of the configuration with recesses and projections, ? is the average inclination angle of the configuration with recesses and projections, and D is the average particle diameter of the electrode active material particles. A cell includes the electrode for a cell described above.Type: ApplicationFiled: November 2, 2017Publication date: September 19, 2019Inventors: Kazuki Arihara, Takamasa Nakagawa, Hideaki Horie, Yuuki Kusachi, Masanori Koike, Hitohisa Okura
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Patent number: 10411268Abstract: Provided is an electrode catalyst having enhanced catalytic activity (oxygen reduction reaction (ORR) specific activity). Disclosed is an electrode catalyst containing a catalyst metal particle(s) and a spacer(s) supported on a catalyst support, in which a ratio (dsp/dcat) of an average diameter of the spacer(s) (dsp) with respect to an average diameter of the catalyst metal particle(s) (dcat) is from 3.5 to 10.Type: GrantFiled: May 10, 2017Date of Patent: September 10, 2019Assignees: NISSAN MOTOR CO., LTD., ISHIFUKU METAL INDUSTRY CO., LTD.Inventors: Atsushi Ohma, Kazuki Arihara, Yoshihisa Furuya, Hideo Inoue, Takehito Nishikawa
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Publication number: 20190165382Abstract: Provided is an electrode catalyst having enhanced catalytic activity (oxygen reduction reaction (ORR) specific activity). Disclosed is an electrode catalyst containing a catalyst metal particle(s) and a spacer(s) supported on a catalyst support, in which a ratio (dsp/dcat) of an average diameter of the spacer(s) (dsp) with respect to an average diameter of the catalyst metal particle(s) (dcat) is from 3.5 to 10.Type: ApplicationFiled: May 10, 2017Publication date: May 30, 2019Applicants: NISSAN MOTOR CO., LTD., ISHIFUKU METAL INDUSTRY CO., LTD.Inventors: Atsushi OHMA, Kazuki ARIHARA, Yoshihisa FURUYA, Hideo INOUE, Takehito NISHIKAWA
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Publication number: 20190083957Abstract: Provided are a carbon powder which can provide a catalyst exhibiting high performance and a catalyst. A carbon powder for fuel cell comprising carbon as a main component, which has a ratio (B/A) of an area B of peak 1 to an area A of peak 0 of more than 0 and 0.15 or less, wherein the area A represents an area of peak 0 at a position of 2?=22.5° to 25° as observed by XRD analysis when the carbon powder for fuel cell is subjected to heat treatment at 1800° C. for 1 hour in an inert atmosphere, and the area B represents an area of peak 1 at a position of 2?=26° as observed by XRD analysis when the carbon powder for fuel cell is subjected to heat treatment at 1800° C. for 1 hour in an inert atmosphere.Type: ApplicationFiled: January 18, 2017Publication date: March 21, 2019Applicants: NISSAN MOTOR CO., LTD., TOYO TANSO CO., LTD.Inventors: Takehiko OKUI, Hiroyuki TANAKA, Kazuki ARIHARA, Tetsuya MASHIO, Atsushi OHMA, Takahiro MORISHITA, Yoshio SHODAI
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Publication number: 20180277856Abstract: An object is to provide a catalyst particle that can exhibit high activity. The catalyst particle is an alloy particle formed of platinum atom and a non-platinum metal atom, wherein (i) the alloy particle has an L12 structure as an internal structure and has an extent of ordering of L12 structure in the range of 30 to 100%, (ii) the alloy particle has an LP ratio calculated by CO stripping method of 10% or more, and (iii) the alloy particle has a dN/dA ratio in the range of 0.4 to 1.0.Type: ApplicationFiled: May 30, 2018Publication date: September 27, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Kazuki Arihara, Hiroyuki Tanaka, Hisashi Mitsumoto, Takahiro Kaito, Seiho Sugawara, Tsukuru Ohwaki
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Publication number: 20180248200Abstract: To provide catalyst particles that can exhibit high activity. Catalyst particles, which are alloy particles formed from platinum atoms and non-platinum metal atoms, each alloy particle having a main body that constitutes a granular form; and a plurality of protrusions protruding outward from the outer surface of the main body, in which the main body is formed from a non-platinum metal and platinum, the protrusions are formed from platinum as a main component, and the aspect ratio (diameter/length) of the protrusions is higher than 0 and lower than or equal to 2.Type: ApplicationFiled: August 27, 2015Publication date: August 30, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Kazuki ARIHARA, Hiroyuki TANAKA
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Patent number: 10014532Abstract: An object is to provide a catalyst particle that can exhibit high activity. The catalyst particle is an alloy particle formed of platinum atom and a non-platinum metal atom, wherein (i) the alloy particle has an L12 structure as an internal structure and has an extent of ordering of L12 structure in the range of 30 to 100%, (ii) the alloy particle has an LP ratio calculated by CO stripping method of 10% or more, and (iii) the alloy particle has a dN/dA ratio in the range of 0.4 to 1.0.Type: GrantFiled: August 6, 2014Date of Patent: July 3, 2018Assignee: NISSAN MOTOR CO., LTD.Inventors: Kazuki Arihara, Hiroyuki Tanaka, Hisashi Mitsumoto, Takahiro Kaito, Seiho Sugawara, Tsukuru Ohwaki
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Patent number: 9991522Abstract: A catalyst particle (1) for a fuel cell according to the present invention includes: a metal particle (2) composed of either one of metal other than noble metal and an alloy of the metal other than the noble metal and the noble metal; and a noble metal layer (3) that is provided on a surface of the metal particle and has a thickness of 1 nm to 3.2 nm. By the fact that the catalyst particle for a fuel cell has such a configuration, the catalyst particle can enhance catalytic activity while reducing an amount of the noble metal. The catalyst particle (1) for a fuel cell according to the present invention can enhance the catalytic activity while reducing the amount of the noble metal.Type: GrantFiled: January 22, 2014Date of Patent: June 5, 2018Assignee: NISSAN MOTOR CO., LTD.Inventors: Kazuki Arihara, Hiroyuki Tanaka
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Publication number: 20160197358Abstract: An object is to provide a catalyst particle that can exhibit high activity. The catalyst particle is an alloy particle formed of platinum atom and a non-platinum metal atom, wherein (i) the alloy particle has an L12 structure as an internal structure and has an extent of ordering of L12 structure in the range of 30 to 100%, (ii) the alloy particle has an LP ratio calculated by CO stripping method of 10% or more, and (iii) the alloy particle has a dN/dA ratio in the range of 0.4 to 1.0.Type: ApplicationFiled: August 6, 2014Publication date: July 7, 2016Applicant: NISSAN MOTOR CO., LTD.Inventors: Kazuki ARIHARA, Hiroyuki TANAKA, Hisashi MITSUMOTO, Takahiro KAITO, Seiho SUGAWARA, Tsukuru OHWAKI
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Publication number: 20160013494Abstract: A catalyst particle (1) for a fuel cell according to the present invention includes: a metal particle (2) composed of either one of metal other than noble metal and an alloy of the metal other than the noble metal and the noble metal; and a noble metal layer (3) that is provided on a surface of the metal particle and has a thickness of 1 nm to 3.2 nm. By the fact that the catalyst particle for a fuel cell has such a configuration, the catalyst particle can enhance catalytic activity while reducing an amount of the noble metal. The catalyst particle (1) for a fuel cell according to the present invention can enhance the catalytic activity while reducing the amount of the noble metal.Type: ApplicationFiled: January 22, 2014Publication date: January 14, 2016Applicant: NISSAN MOTOR CO., LTD.Inventors: Kazuki ARIHARA, Hiroyuki TANAKA