Patents by Inventor Nobuhiro Goda

Nobuhiro Goda 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: 10707490
    Abstract: A polymer compound, which is used as a binder for a negative electrode of an electricity storage device, is obtained by condensation of a vinyl polymer that contains a carboxyl group and a third compound that is selected from among an aromatic multifunctional amine, phosphorous acid, phosphorous acid ester, trialkoxysilane, and phosphoric acid.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: July 7, 2020
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yusuke Sugiyama, Takeshi Kondo, Nobuhiro Goda, Masakazu Murase
  • Patent number: 10686223
    Abstract: To provide a nonaqueous electrolyte secondary battery that suppresses elution of Al from a positive electrode current collector formed of aluminum or an aluminum alloy, and is superior in thermal characteristics and input-output characteristics. Provided is a nonaqueous electrolyte secondary battery including a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode has a positive electrode current collector formed of aluminum or an aluminum alloy. The electrolytic solution contains a metal salt and an organic solvent having a heteroelement. Regarding an intensity of a peak derived from the organic solvent in a vibrational spectroscopy spectrum of the electrolytic solution, Is>Io is satisfied when an intensity of an original peak of the organic solvent is represented as Io and an intensity of a peak resulting from shifting of the original peak is represented as Is.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: June 16, 2020
    Assignees: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, THE UNIVERSITY OF TOKYO
    Inventors: Atsuo Yamada, Yuki Yamada, Kohei Mase, Tomoyuki Kawai, Yoshihiro Nakagaki, Yuki Hasegawa, Nobuhiro Goda
  • Patent number: 10538625
    Abstract: A polymer compound is formed by condensing a polyacrylic acid having some of carboxyl groups converted into a lithium salt with a polyfunctional amine represented by the following general formula (1). A chain structure constituted by the polyacrylic acid has free carboxyl groups and carboxyl groups converted into a lithium salt. Y is a straight-chain alkyl group having 1 to 4 carbon atoms, a phenylene group, or an oxygen atom. R1 and R2 are each independently one or more hydrogen atoms, a methyl group, an ethyl group, a trifluoromethyl group, or a methoxy group.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: January 21, 2020
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takeshi Kondo, Yusuke Sugiyama, Nobuhiro Goda
  • Patent number: 10476073
    Abstract: A production process for carbon-coated silicon material includes the step of: heating CaSi2 and a halogen-containing polymer at a temperature being a carbonization temperature or more of the halogen-containing polymer in a state where the CaSi2 and the halogen-containing polymer coexist.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: November 12, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hiroki Oshima, Takashi Mohri, Nobuhiro Goda, Masataka Nakanishi
  • Publication number: 20190338073
    Abstract: A polymer compound is formed by condensing a polyacrylic acid having some of carboxyl groups converted into a lithium salt with a polyfunctional amine represented by the following general formula (1). A chain structure constituted by the polyacrylic acid has free carboxyl groups and carboxyl groups converted into a lithium salt. Y is a straight-chain alkyl group having 1 to 4 carbon atoms, a phenylene group, or an oxygen atom. R1 and R2 are each independently one or more hydrogen atoms, a methyl group, an ethyl group, a trifluoromethyl group, or a methoxy group.
    Type: Application
    Filed: January 30, 2017
    Publication date: November 7, 2019
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takeshi KONDO, Yusuke SUGIYAMA, Nobuhiro GODA
  • Patent number: 10446838
    Abstract: Cycle characteristics of a nonaqueous secondary battery are to be improved. An active material including: a first active material that contains a nano silicon produced by heating a layered polysilane represented by a composition formula (SiH)n and having a structure in which multiple six-membered rings formed from silicon atoms are connected; and a second active material that contains a graphite, is used in a negative electrode. With this, expansion and contraction due to stress during charging and discharging can be mitigated, and thereby cycle characteristics improve.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: October 15, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takeshi Kondo, Yusuke Sugiyama, Takashi Mohri, Hiroki Oshima, Tomohiro Niimi, Mutsumi Takahashi, Nobuhiro Goda, Takahiro Sugioka, Yuta Kawamoto
  • Patent number: 10347910
    Abstract: A nano silicon material having reduced amounts of oxygen (O) and chlorine (Cl) contained therein is provided. The nano silicon material contains fluorine (F) and nano-sized silicon crystallites. Generation of a layer in which oxygen (O) and chlorine (Cl) are present is suppressed due to the presence of fluorine (F), so that a decrease in the moving speed of lithium ions is suppressed. In addition, due to the presence of fluorine (F), the concentrations of oxygen (O) and chlorine (Cl) are reduced, so that reaction thereof with lithium ions is suppressed.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: July 9, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takeshi Kondo, Yusuke Sugiyama, Nobuhiro Goda, Takashi Mohri, Hiroki Oshima, Masataka Nakanishi
  • Patent number: 10333139
    Abstract: Provided is a negative electrode active material including complex particles formed of: nano silicon aggregated particles produced by heating a layered polysilane represented by a composition formula of (SiH)n and having a structure in which multiple six-membered rings formed from silicon atoms are connected; and a composited carbon layer formed from an amorphous carbon and at least covering one portion of the aggregated particles. A mean particle diameter D50 of the aggregated particles is within a range of 0.2 ?m to 30 ?m, and a mean particle diameter D50 of the complex particles is within a range of 0.5 ?m to 40 ?m.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: June 25, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takeshi Kondo, Tomohiro Niimi, Yusuke Sugiyama, Masataka Nakanishi, Nobuhiro Goda
  • Patent number: 10308515
    Abstract: Provided is a method for producing a CaSi2-containing composition, the method including: a molten metal step of adding Ca and/or M (M is at least one element selected from elements of groups 3 to 9) to a CaSi2-containing composition containing crystalline silicon to prepare a molten metal containing Ca, M and Si that satisfy the following condition: when a molar ratio of Ca, M and Si is x:y:z (x+y+z=100), x, y and z satisfy 23<x?100/3, 0<y<10 and 64<z?200/3, respectively; and a cooling step of cooling the molten metal to obtain a CaSi2-containing composition containing a reduced amount of crystalline silicon.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: June 4, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Masanori Harata, Nobuhiro Goda, Takashi Mohri, Hiroki Oshima
  • Publication number: 20190119448
    Abstract: A polymer compound to be used as a binder for a negative electrode of a power storage device is provided. The polymer compound is formed by condensation of a polyacrylic acid and a polyfunctional amine represented by the following general formula (1), where X is a ring structure having 1 to 3 benzene rings; and C1 to C4 are each a carbon atom constituting a benzene ring in the ring structure.
    Type: Application
    Filed: March 27, 2017
    Publication date: April 25, 2019
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yusuke SUGIYAMA, Takeshi KONDO, Nobuhiro GODA
  • Patent number: 10230100
    Abstract: A negative-electrode active material is used for a negative electrode, the negative-electrode active material including: agglomerated particles including nanometer-size silicon produced by heat treating a lamellar polysilane having a structure in which multiple six-membered rings constituted of a silicon atom are disposed one after another, and expressed by a compositional formula, (SiH)n; and a carbon layer including amorphous carbon, and covering at least some of the agglomerated particles to be composited therewith. An electric storage apparatus including the same is not only able to reduce the irreversible capacity, but also able to inhibit the generation of “SEI.
    Type: Grant
    Filed: December 25, 2013
    Date of Patent: March 12, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yusuke Sugiyama, Masataka Nakanishi, Nobuhiro Goda, Tomohiro Niimi, Masakazu Murase, Takeshi Kondo, Shigenori Koishi, Hiroshi Hirate, Yoshihiro Nakagaki, Mutsumi Takahashi
  • Patent number: 10217990
    Abstract: A silicon material useful as a negative electrode active material is provided. The silicon material has an Si/O atom ratio within a range of greater than 1/0.5 and not greater than 1/0.1 and a band gap within a range of greater than 1.1 eV and not greater than 2.1 eV. A secondary battery in which this silicon material is used as a negative electrode active material has long life.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: February 26, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takashi Mohri, Masanori Harata, Masataka Nakanishi, Hiroki Oshima, Nobuhiro Goda
  • Patent number: 10164255
    Abstract: A silicon material useful as a negative electrode active material is provided. The silicon material has a band gap within a range of greater than 1.1 eV and not greater than 1.7 eV. A secondary battery in which this silicon material is used as a negative electrode active material has improved initial efficiency.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: December 25, 2018
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takashi Mohri, Masataka Nakanishi, Hiroki Oshima, Masanori Harata, Nobuhiro Goda
  • Publication number: 20180323427
    Abstract: A negative electrode active material is composed of a silicon material coated with a carbon layer containing a Group 4 to 6 metal. A method for producing a negative electrode active material includes a step of decomposing a compound containing the Group 4 to 6 metal and a carbon source by heating in the presence of a silicon material, the compound, and the carbon source.
    Type: Application
    Filed: November 1, 2016
    Publication date: November 8, 2018
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yusuke SUGIYAMA, Hirotaka SONE, Nobuhiro GODA, Takashi MOHRI
  • Publication number: 20180277852
    Abstract: An object is to provide a nonaqueous electrolyte secondary battery that has an SEI coating with a special structure and has excellent battery characteristics. As an electrolytic solution of the nonaqueous electrolyte secondary battery, an electrolytic solution containing: a salt whose cation is an alkali metal, an alkaline earth metal, or aluminum and whose cation is an alkali metal, an alkaline earth metal, or aluminum; and an organic solvent having a heteroelement is used, wherein, Is>Io is satisfied, and an S,O-containing coating having an S?O structure is formed on the surface of a positive electrode and/or a negative electrode. Alternatively, the above described electrolytic solution is used, and, as a binding agent for negative electrodes, a binding agent formed of a polymer having a hydrophilic group is used.
    Type: Application
    Filed: May 31, 2018
    Publication date: September 27, 2018
    Applicant: THE UNIVERSITY OF TOKYO
    Inventors: Atsuo YAMADA, Yuki YAMADA, Yoshihiro NAKAGAKI, Tomoyuki KAWAI, Kohei MASE, Yuki HASEGAWA, Manabu MIYOSHI, Nobuhiro GODA, Hiroyuki SASAKI, Takefumi FUKUMOTO
  • Publication number: 20180265366
    Abstract: A method for producing a silicon material, the method including: a step of heating CaSi2 powder in a range of 400 to 1000° C.; a step of reacting acid with the CaSi2 powder having been subjected to the step of heating CaSi2 powder in a range of 400 to 1000° C., to obtain a layered silicon compound; and a step of heating the layered silicon compound at not less than 300° C.
    Type: Application
    Filed: October 27, 2016
    Publication date: September 20, 2018
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Masanori HARATA, Takashi MOHRI, Nobuhiro GODA, Yasuhiro YAMAGUCHI
  • Publication number: 20180179072
    Abstract: Provided is a method for producing a silicon material, the method including: a molten metal preparing step of preparing Ca-x at % Si alloy (42?x?75) molten metal; a solidifying step of cooling the molten metal by a rapid cooling device to solidify the Ca-x at % Si alloy; a synthesizing step of reacting the solidified Ca-x at % Si alloy with acid to obtain a layered silicon compound; and a heating step of heating the layered silicon compound at not less than 300° C.
    Type: Application
    Filed: May 20, 2016
    Publication date: June 28, 2018
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Masanori HARATA, Takashi MOHRI, Nobuhiro GODA
  • Publication number: 20180170761
    Abstract: Provided is a method for producing a CaSi2-containing composition, the method including: a molten metal step of adding Ca and/or M (M is at least one element selected from elements of groups 3 to 9) to a CaSi2-containing composition containing crystalline silicon to prepare a molten metal containing Ca, M and Si that satisfy the following condition: when a molar ratio of Ca, M and Si is x:y:z (x+y+z=100), x, y and z satisfy 23<x?100/3, 0<y<10 and 64<z?200/3, respectively; and a cooling step of cooling the molten metal to obtain a CaSi2-containing composition containing a reduced amount of crystalline silicon.
    Type: Application
    Filed: May 20, 2016
    Publication date: June 21, 2018
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Masanori HARATA, Nobuhiro GODA, Takashi MOHRI, Hiroki OSHIMA
  • Patent number: 9966607
    Abstract: A polymer compound for use as a binder for a negative electrode of an electrical storage device is formed by condensing polyacrylic acid and a multifunctional amine represented by the following formula (1), in which Y represents a straight chain alkyl group having 1 to 4 carbon atoms, a phenylene group, or an oxygen atom, and R1 and R2 each independently represent one or more hydrogen atoms, methyl groups, ethyl groups, trifluoromethyl groups, or methoxy groups.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: May 8, 2018
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yusuke Sugiyama, Nobuhiro Goda, Masakazu Murase, Takeshi Kondo, Yuta Kawamoto, Tomokuni Abe, Yuta Nakagawa, Jun Kaneda
  • Patent number: 9935310
    Abstract: Providing a silicon-containing material having a novel structure being distinct from the structure of conventional silicon oxide disproportionated to use. A silicon-containing material according to the present invention includes at least the following: a continuous phase including silicon with Si—Si bond, and possessing a bubble-shaped skeleton being continuous three-dimensionally; and a dispersion phase including silicon with Si—O bond, and involved in an area demarcated by said continuous phase to be in a dispersed state.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: April 3, 2018
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yoshihiro Nakagaki, Nobuhiro Goda, Manabu Miyoshi, Yushi Kondo, Kensuke Yotsumoto