Patents by Inventor Shigekazu Yasuoka

Shigekazu Yasuoka 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: 20220359884
    Abstract: A battery includes: an electrode group including an air electrode and a negative electrode that are stacked with a separator interposed therebetween; and a container housing the electrode group together with an alkaline electrolyte liquid. The air electrode includes a catalyst for an air electrode. This catalyst for an air electrode is a catalyst for an air electrode including an oxide containing at least bismuth (Bi), ruthenium (Ru), sodium (Na), and oxygen, and Na/(Ru+Bi+Na) representing an atomic ratio of the sodium to a sum of the bismuth, the ruthenium, and the sodium is 0.126 or more and 0.145 or less.
    Type: Application
    Filed: April 21, 2022
    Publication date: November 10, 2022
    Inventors: Minori Inoue, Takeshi Kajiwara, Shohei Unoki, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Patent number: 11495804
    Abstract: An air electrode catalyst for an air secondary battery includes a pyrochlore-type composite oxide having two or more crystal structures having a different amount of oxygen. A battery, according to some embodiments, includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and a container accommodating the electrode group along with an alkali electrolyte solution, wherein the air electrode includes the air electrode catalyst. The air electrode catalyst may have a pyrochlore-type composite oxide having a crystal structure represented by Bi2Ru2O6.92 and a crystal structure represented by Bi2Ru2O7.33.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: November 8, 2022
    Assignees: FDK CORPORATION, JAPAN METALS AND CHEMICALS CO., LTD.
    Inventors: Shohei Unoki, Takeshi Kajiwara, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Patent number: 11322751
    Abstract: A battery includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and an accommodating bag accommodating the electrode group along with an alkali electrolyte solution. The air electrode includes a catalyst for an air secondary battery. This catalyst for an air secondary battery is produced by a method for producing a catalyst for an air secondary battery, the method including a precursor preparation step of preparing a bismuth-ruthenium oxide precursor, a calcination step of calcining the bismuth-ruthenium oxide precursor obtained in this precursor preparation step to form a bismuth-ruthenium oxide, and a nitric acid treatment step of immersing the bismuth-ruthenium oxide obtained by this calcination step in a nitric acid aqueous solution.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: May 3, 2022
    Assignee: FDK CORPORATION
    Inventors: Shohei Unoki, Takeshi Kajiwara, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Patent number: 11228027
    Abstract: A nickel-hydrogen secondary battery includes an electrode group comprising a separator, a positive electrode, and a negative electrode, and the positive electrode contains a positive electrode active material including a base particle comprising a nickel hydroxide particle containing Mn in solid solution and a conductive layer comprising a Co compound and covering the surface of the base particle, wherein the X-ray absorption edge energy of Mn detected within 6500 to 6600 eV by measurement with an XAFS method is 6548 eV or higher.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: January 18, 2022
    Assignees: FDK CORPORATION, FUJITSU LIMITED
    Inventors: Takeshi Ito, Yuzo Imoto, Masaru Kihara, Takayuki Yano, Shigekazu Yasuoka, Shuuichi Doi, Takashi Yamazaki, Yuji Kataoka
  • Publication number: 20210043945
    Abstract: A battery includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and an accommodating bag accommodating the electrode group along with an alkali electrolyte solution. The air electrode includes a catalyst for an air secondary battery. This catalyst for an air secondary battery is produced by a method for producing a catalyst for an air secondary battery, the method including a precursor preparation step of preparing a bismuth-ruthenium oxide precursor, a calcination step of calcining the bismuth-ruthenium oxide precursor obtained in this precursor preparation step to form a bismuth-ruthenium oxide, and a nitric acid treatment step of immersing the bismuth-ruthenium oxide obtained by this calcination step in a nitric acid aqueous solution.
    Type: Application
    Filed: March 25, 2019
    Publication date: February 11, 2021
    Inventors: Shohei Unoki, Takeshi Kajiwara, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Publication number: 20200251746
    Abstract: An air electrode catalyst for an air secondary battery includes a pyrochlore-type composite oxide having two or more crystal structures having a different amount of oxygen. A battery, according to some embodiments, includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and a container accommodating the electrode group along with an alkali electrolyte solution, wherein the air electrode includes the air electrode catalyst. The air electrode catalyst may have a pyrochlore-type composite oxide having a crystal structure represented by Bi2Ru2O6.92 and a crystal structure represented by Bi2Ru2O7.33.
    Type: Application
    Filed: February 4, 2020
    Publication date: August 6, 2020
    Inventors: Shohei Unoki, Takeshi Kajiwara, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Publication number: 20200161646
    Abstract: A nickel-hydrogen secondary battery includes an electrode group comprising a separator, a positive electrode, and a negative electrode, and the positive electrode contains a positive electrode active material including a base particle comprising a nickel hydroxide particle containing Mn in solid solution and a conductive layer comprising a Co compound and covering the surface of the base particle, wherein the X-ray absorption edge energy of Mn detected within 6500 to 6600 eV by measurement with an XAFS method is 6548 eV or higher.
    Type: Application
    Filed: January 27, 2020
    Publication date: May 21, 2020
    Inventors: Takeshi Ito, Yuzo Imoto, Masaru Kihara, Takayuki Yano, Shigekazu Yasuoka, Shuuichi Doi, Takashi Yamazaki, Yuji Kataoka
  • Patent number: 10418628
    Abstract: A multi-phase hydrogen storage alloy comprising a hexagonal Ce2Ni7 phase and a hexagonal Pr5Co19 phase, where the Ce2Ni7 phase abundance is ?30 wt % and the Pr5Co19 phase abundance is ?8 wt % and where the alloy comprises a mischmetal where Nd in the mischmetal is <50 at % or a multi-phase hydrogen storage alloy comprising one or more rare earth elements, a hexagonal Ce2Ni7 phase and a hexagonal Pr5Co19 phase, where the Ce2Ni7 phase abundance is from about 30 to about 72 wt % and the Pr5Co19 phase abundance is ?8 wt % have improved electrochemical performance. The alloys are useful in an electrode in a metal hydride battery, a fuel cell or a metal hydride air battery.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: September 17, 2019
    Assignees: BASF Corporation, FDK Corporation
    Inventors: Kwo Young, Taihei Ouchi, Jean Nei, Diana Wong, Shigekazu Yasuoka
  • Patent number: 10177385
    Abstract: A nickel-hydrogen secondary battery includes an electrode group including a separator, a positive electrode and a negative electrode, the positive electrode includes a positive electrode active material, the positive electrode active material includes a composite particle including a compound of Co and a compound of Ni, and the ratio R represented by A/B satisfies a relationship of R?0.3, when the amount of jumping in the X-ray absorption fine structure spectrum of the Co in 7600 to 7800 eV and the amount of jumping in the X-ray absorption fine structure spectrum of the Ni in 8300 to 8500 eV obtained by measurement according to a conversion electron yield method are defined as A and B, respectively.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: January 8, 2019
    Assignees: FDK CORPORATION, FUJITSU LIMITED
    Inventors: Yuzo Imoto, Takeshi Ito, Shigekazu Yasuoka, Shuuichi Doi, Takashi Yamazaki, Yuji Kataoka
  • Patent number: 9972837
    Abstract: A multi-phase hydrogen storage alloy comprising a hexagonal Ce2Ni7 phase and a hexagonal Pr5Co19 phase, where the Ce2Ni7 phase abundance is ?30 wt % and the Pr5Co19 phase abundance is ?8 wt % and where the alloy comprises a mischmetal where Nd in the mischmetal is <50 at % or a multi-phase hydrogen storage alloy comprising one or more rare earth elements, a hexagonal Ce2Ni7 phase and a hexagonal Pr5Co19 phase, where the Ce2Ni7 phase abundance is from about 30 to about 72 wt % and the Pr5Co19 phase abundance is ?8 wt % have improved electrochemical performance. The alloys are useful in an electrode in a metal hydride battery, a fuel cell or a metal hydride air battery.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: May 15, 2018
    Assignees: BASF Corporation, FDK Corporation
    Inventors: Kwo Young, Taihei Ouchi, Jean Nei, Diana Wong, Shigekazu Yasuoka
  • Publication number: 20180131001
    Abstract: A multi-phase hydrogen storage alloy comprising a hexagonal Ce2Ni7 phase and a hexagonal Pr5Co19 phase, where the Ce2Ni7 phase abundance is ?30 wt % and the Pr5Co19 phase abundance is ?8 wt % and where the alloy comprises a mischmetal where Nd in the mischmetal is <50 at % or a multi-phase hydrogen storage alloy comprising one or more rare earth elements, a hexagonal Ce2Ni7 phase and a hexagonal Pr5Co19 phase, where the Ce2Ni7 phase abundance is from about 30 to about 72 wt % and the Pr5Co19 phase abundance is ?8 wt % have improved electrochemical performance. The alloys are useful in an electrode in a metal hydride battery, a fuel cell or a metal hydride air battery.
    Type: Application
    Filed: January 4, 2018
    Publication date: May 10, 2018
    Inventors: Kwo Young, Taihei Ouchi, Jean Nei, Diana Wong, Shigekazu Yasuoka
  • Publication number: 20170237065
    Abstract: A nickel-hydrogen secondary battery includes an electrode group comprising a separator, a positive electrode, and a negative electrode, and the positive electrode contains a positive electrode active material including a base particle comprising a nickel hydroxide particle containing Mn in solid solution and a conductive layer comprising a Co compound and covering the surface of the base particle, wherein the X-ray absorption edge energy of Mn detected within 6500 to 6600 eV by measurement with an XAFS method is 6548 eV or higher.
    Type: Application
    Filed: February 6, 2017
    Publication date: August 17, 2017
    Inventors: Takeshi Ito, Yuzo Imoto, Masaru Kihara, Takayuki Yano, Shigekazu Yasuoka, Shuuichi Doi, Takashi Yamazaki, Yuji Kataoka
  • Publication number: 20170141401
    Abstract: A nickel-hydrogen secondary battery includes an electrode group including a separator, a positive electrode and a negative electrode, the positive electrode includes a positive electrode active material, the positive electrode active material includes a composite particle including a compound of Co and a compound of Ni, and the ratio R represented by A/B satisfies a relationship of R?0.3, when the amount of jumping in the X-ray absorption fine structure spectrum of the Co in 7600 to 7800 eV and the amount of jumping in the X-ray absorption fine structure spectrum of the Ni in 8300 to 8500 eV obtained by measurement according to a conversion electron yield method are defined as A and B, respectively.
    Type: Application
    Filed: November 11, 2016
    Publication date: May 18, 2017
    Inventors: Yuzo Imoto, Takeshi Ito, Shigekazu Yasuoka, Shuuichi Doi, Takashi Yamazaki, Yuji Kataoka
  • Publication number: 20150333327
    Abstract: A multi-phase hydrogen storage alloy comprising a hexagonal Ce2Ni7 phase and a hexagonal Pr5Co19 phase, where the Ce2Ni7 phase abundance is ?30 wt % and the Pr5Co19 phase abundance is 8 wt % and where the alloy comprises a mischmetal where Nd in the mischmetal is <50 at % or a multi-phase hydrogen storage alloy comprising one or more rare earth elements, a hexagonal Ce2Ni7 phase and a hexagonal Pr5Co19 phase, where the Ce2Ni7 phase abundance is from about 30 to about 72 wt % and the Pr5Co19 phase abundance is ?8 wt % have improved electrochemical performance. The alloys are useful in an electrode in a metal hydride battery, a fuel cell or a metal hydride air battery.
    Type: Application
    Filed: May 13, 2015
    Publication date: November 19, 2015
    Inventors: Kwo Young, Taihei Ouchi, Jean Nei, Diana Wong, Shigekazu Yasuoka
  • Patent number: 8563170
    Abstract: A negative electrode for alkaline storage battery using a hydrogen-absorbing alloy includes fluorinated oil and a surface active agent.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: October 22, 2013
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yoshifumi Magari, Tadayoshi Tanaka, Shigekazu Yasuoka, Masaru Kihara, Akira Saguchi, Toshiki Sato
  • Patent number: 8481210
    Abstract: An alkaline storage battery has a negative electrode using a hydrogen-absorbing alloy represented by a general formula Ln1-xMgxNiyAz wherein Ln is at least one element selected from rare-earth elements including Y, Ca, Zr, and Ti, A is at least one element selected from Co, Fe, Mn, V, Cr, Nb, Al, Ga, Zn, Sn, Cu, Si, P and B, and 0.15?x?0.30, 0<z?1.5, and 2.8?y+z?4.0 are satisfied. The hydrogen-absorbing alloy has a hexagonal system crystal structure or a rhombohedral system crystal structure as its main phase and has a subphase of line which average number of not less than 50 nm in thickness existing in the range of 10 ?m×10 ?m in the cross section of the main phase is 3 or less.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: July 9, 2013
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Jun Ishida, Yoshifumi Magari, Shigekazu Yasuoka
  • Patent number: 8317950
    Abstract: A hydrogen-absorbing alloy for alkaline storage battery which is produced by a rapid cool using a rapid quenching method and whose component is represented by a general formula Ln1-xMgxNia-b-cAlbZc is used for a negative electrode of an alkaline storage battery.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: November 27, 2012
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yoshifumi Magari, Jun Ishida, Shigekazu Yasuoka
  • Patent number: 8105715
    Abstract: A hydrogen absorbing alloy is provided that is represented by the general formula Ln1-xMgxNiyAz, where: Ln is at least one element selected from the group consisting of Ca, Zr, Ti, and rare-earth elements including Y; A is at least one element selected from the group consisting of Co, Mn, V, Cr, Nb, Al, Ga, Zn, Sn, Cu, Si, P, and B; and x, y, and z satisfy the following conditions 0.05?x?0.25, 0<z?1.5, and 2.8?y+z?4.0, wherein Ln contains 20 mole % or more of Sm.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: January 31, 2012
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Jun Ishida, Yoshifumi Magari, Shigekazu Yasuoka
  • Patent number: 8101121
    Abstract: A hydrogen absorbing alloy represented by the formula Ln1?xMgxNiy?aAla (where Ln is at least one element selected from rare earth elements, 0.05?x<0.20, 2.8?y?3.9 and 0.10?a?0.25) which is used for an alkaline storage battery.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: January 24, 2012
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Shigekazu Yasuoka, Jun Ishida, Tetsuyuki Murata, Hiroshi Nakamura
  • Patent number: 8053114
    Abstract: Low temperature discharge capability and high rate discharge capability are improved in an alkaline storage battery that uses as its negative electrode a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least nickel and a rare-earth element. An alkaline storage battery uses as the negative electrode a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least nickel and a rare-earth element. The hydrogen-absorbing alloy particles have a surface layer and an interior portion, the surface layer having a nickel content greater than that of the interior portion, and nickel particles having a particle size within a range of from 10 nm to 50 nm are present in the surface layer.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: November 8, 2011
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yoshifumi Magari, Jun Ishida, Shigekazu Yasuoka