Patents by Inventor Hirofumi Nakamoto

Hirofumi Nakamoto 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: 20150303522
    Abstract: An electrolytic solution for a fluoride ion battery includes: a fluoride salt; and a solvent for dissolving the fluoride salt, in which the solvent is an ether-containing material having a cation and an anion, and in the cation, an ether group represented by —CH2—O—R (where R represents an alkyl group or a fluoroalkyl group) binds to a cation central element which is N or P.
    Type: Application
    Filed: April 15, 2015
    Publication date: October 22, 2015
    Inventors: Hirofumi NAKAMOTO, Zempachi OGUMI, Jun-ichi YAMAKI
  • Publication number: 20150303514
    Abstract: An electrolytic solution for a fluoride ion battery includes: a fluoride salt; and an alcohol material that has one OH group, and in which a molar ratio of the alcohol material is more than 1 with respect to fluoride ions of the fluoride salt.
    Type: Application
    Filed: April 15, 2015
    Publication date: October 22, 2015
    Inventors: Hirofumi NAKAMOTO, Zempachi OGUMI, Jun-ichi YAMAKI
  • Patent number: 9142856
    Abstract: A liquid hydrophobic phase transition substance is provided that may improve the safety of a battery and restrain the deterioration in performance of the battery without deteriorating the properties of the battery. The liquid hydrophobic phase transition substance includes a hydrophobic salt having a melting point of 80° C. or more and a hydrophilic salt of an alkali or an alkaline earth.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: September 22, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hirofumi Nakamoto
  • Publication number: 20150236377
    Abstract: The present invention is to provide: a liquid electrolyte for batteries, which has excellent stability to lithium metals; a method for producing the liquid electrolyte; and a lithium battery comprising the liquid electrolyte. Presented is a liquid electrolyte for lithium batteries, wherein the liquid electrolyte comprises a mesoionic compound represented by the following general formula (1): wherein R1 is an aliphatic hydrocarbon group having 1 to 3 carbon atoms, and R2 is a group represented by any one of the following general formulae (2), (3) and (4): General Formula (2): —C1H21—(OCH2)m—CnH2n+1; General Formula (3): —CxH2x—(CH2OCH2)y—CzH2z+1; and General Formula (4): —CpH2p—(C2H4OCH2)q—CrH2r+1.
    Type: Application
    Filed: September 9, 2013
    Publication date: August 20, 2015
    Inventors: Tsunehisa Hirashita, Shuki Araki, Hirofumi Nakamoto, Atsushi Shirasawa
  • Publication number: 20140295262
    Abstract: An electrolyte solution for a lithium metal battery includes an ionic liquid that has a cation that includes a nitrogen atom and an ether group. The nitrogen atom at a center of the cation and an oxygen atom on the ether group are arranged with a single carbon atom being located between the nitrogen atom and the oxygen atom.
    Type: Application
    Filed: March 21, 2014
    Publication date: October 2, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirofumi NAKAMOTO, Yoshiumi KAWAMURA
  • Publication number: 20140295292
    Abstract: An electrolyte solution for a lithium-air battery contains an ionic liquid that has a cation in which ether groups are incorporated in parallel.
    Type: Application
    Filed: March 20, 2014
    Publication date: October 2, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hirofumi NAKAMOTO
  • Publication number: 20140242473
    Abstract: Provided is an electrolyte solution for a magnesium battery, containing a mesoionic compound represented by the following general formula (1): (in general formula (1), R1 and R2 are each independently a C1-7 hydrocarbyl group or oxygen-containing hydrocarbyl group and X is O or S).
    Type: Application
    Filed: February 27, 2014
    Publication date: August 28, 2014
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, National University Corporation Nagoya Institute Of Technology
    Inventors: Tsunehisa HIRASHITA, Hirofumi NAKAMOTO
  • Publication number: 20140220476
    Abstract: An object of the present invention is to provide a liquid electrolyte for batteries, which has excellent ion conductivity, a method for producing the liquid electrolyte and a battery including the liquid electrolyte. Disclosed is a liquid electrolyte for batteries, comprising a mesoionic compound represented by the following general formula (1): wherein R1 and R2 are each independently an alkyl group having 1 to 3 carbon atoms.
    Type: Application
    Filed: August 28, 2012
    Publication date: August 7, 2014
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NAGOYA INSTITUTE OF TECHNOLOGY
    Inventors: Tsunehisa Hirashita, Shuki Araki, Katsuyuki Kagami, Hirofumi Nakamoto, Taishi Shiotsuki
  • Publication number: 20140212772
    Abstract: Provided is an electrolyte solution capable of further increasing the output of a lithium air battery, the electrolyte solution for a lithium air battery having a total bonding strength between Li2O2 is no less than 0.14.
    Type: Application
    Filed: June 15, 2012
    Publication date: July 31, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirofumi Nakamoto, Taishi Shiotsuki, Atsushi Shirasawa, Yushi Suzuki
  • Publication number: 20140004428
    Abstract: An ionic liquid increases power density and discharge capacity in an air battery. Also, to provide a liquid electrolyte for lithium air batteries and an air battery, both of which include the ionic liquid. The ionic liquid for air batteries in which the cation has a structure represented by the following general formulae (1), (2) or (3): wherein R1 to R4 are independent of each other, and R1 to R4 are each an aliphatic hydrocarbon group having 1 to 8 carbon atoms, or the like; wherein R5 to R7 are independent of each other, and R5 to R7 are each an aliphatic hydrocarbon group having 1 to 8 carbon atoms, or the like; wherein R8 to R10 are independent of each other, and R8 to R10 are each an aliphatic hydrocarbon group having 1 to 8 carbon atoms, or the like.
    Type: Application
    Filed: June 13, 2013
    Publication date: January 2, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hirofumi NAKAMOTO
  • Patent number: 8591603
    Abstract: The main object of the present invention is to provide a method for producing an all solid lithium battery, capable of easily performing dew point control in a battery assembly step. The present invention solves the above-mentioned problems by providing a method for producing an all solid lithium battery, comprising the steps of: preparing a material composition by adding Li2S, P2S5, and P2O5 so as to satisfy a relation of (Li2S)/(P2S5+P2O5)<3 on a molar basis, synthesizing a sulfide solid electrolyte from the above-mentioned material composition by a vitrification means, and assembling an all solid lithium battery in an atmosphere having a dew-point temperature of ?60° C. or more while using the above-mentioned sulfide solid electrolyte.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: November 26, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shigenori Hama, Yukiyoshi Ueno, Yasushi Tsuchida, Hirofumi Nakamoto, Masato Kamiya, Hiroshi Nagase
  • Patent number: 8557412
    Abstract: It is a major object of the invention to provide a method for processing a battery member, by which a cathode active material and a sulfide solid electrolyte material can be efficiently separated from each other and the cathode active material and Li contained in the sulfide solid electrolyte material can be efficiently recovered.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: October 15, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yasushi Tsuchida, Yukinari Kotani, Yukiyoshi Ueno, Shigenori Hama, Hirofumi Nakamoto, Hiroshi Nagase, Masato Kamiya
  • Patent number: 8535849
    Abstract: An electrochemical cell includes an electrolyte membrane containing an ionic conductor. The ionic conductor includes: (a) a cation expressed by one of Formulae (1) and (2): R1R2R3HX+??(1) where, in Formula (1), X indicates any one of N and P, and R1, R2 and R3 each indicate any one of alkyl groups C1 to C18 except a structure in which R1=R2=R3, R1R2HS+??(2) where, in Formula (2), R1 and R2 each indicate any one of alkyl groups C1 to C18 except a structure in which R1=R2; and (b) an anion expressed by Formula (3): R4YOm(OH)n?1O???(3) where, in Formula (3), Y indicates any one of S, C, N and P, R4 indicates any one of an alkyl group and a fluoroalkyl group, and m and n each indicate any one of 1 and 2.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: September 17, 2013
    Assignees: Nissan Motor Co., Ltd., National University Corporation Yokohama National University
    Inventors: Masayoshi Watanabe, Hirofumi Nakamoto, Tomokazu Yamane, Toshihiro Takekawa
  • Publication number: 20130209915
    Abstract: An electrolyte solution for a lithium battery contains 1-butyl-3-methyltetrazolium-5-olate represented by formula (1).
    Type: Application
    Filed: October 24, 2011
    Publication date: August 15, 2013
    Applicants: NATIONAL UNIVERSITY CORPORATION NAGOYA INSTITUTE OF TECHNOLOGY, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tsunehisa Hirashita, Hirofumi Nakamoto, Taishi Shiotsuki
  • Publication number: 20130095388
    Abstract: A liquid hydrophobic phase transition substance is provided that may improve the safety of a battery and restrain the deterioration in performance of the battery without deteriorating the properties of the battery. The liquid hydrophobic phase transition substance includes a hydrophobic salt having a melting point of 80° C. or more and a hydrophilic salt of an alkali or an alkaline earth.
    Type: Application
    Filed: January 12, 2010
    Publication date: April 18, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hirofumi Nakamoto
  • Publication number: 20130084491
    Abstract: An object of the present invention is to provide an ambient temperature molten salt having excellent electron conductivity in addition to ion conductivity. The present invention attains the object by providing an ambient temperature molten salt including a first imidazolium salt having a cationic segment represented by the general formula (1) and an anionic segment represented by MX4 (where M is a transition metal and X is a halogen); and a second salt having a cationic segment as a monovalent cation and an anionic segment as a halogen.
    Type: Application
    Filed: October 22, 2010
    Publication date: April 4, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirofumi Nakamoto, Fuminori Mizuno
  • Publication number: 20130040210
    Abstract: The main object of the present invention is to provide a nonaqueous electrolyte having favorable radical resistance. The present invention attains the object by providing a nonaqueous electrolyte comprising an ionic liquid having a cation portion and an anion portion, an organic solvent, and a metal salt, characterized in that the maximum electric charge calculated by the first-principle calculation in the cation portion of the ionic liquid and the organic solvent is 0.3 or less.
    Type: Application
    Filed: March 10, 2010
    Publication date: February 14, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Fuminori Mizuno, Hidetaka Nishikori, Hirofumi Nakamoto
  • Publication number: 20120315553
    Abstract: A non-aqueous liquid electrolyte secondary battery, including a cathode, an anode and a non-aqueous liquid electrolyte present between the cathode and the anode. The non-aqueous liquid electrolyte secondary battery has a closed structure in which the cathode, the anode and the non-aqueous liquid electrolyte are insulated from at least carbon dioxide and water. The non-aqueous liquid electrolyte secondary battery has a discharge voltage of 3V or less relative to a Li/Li+ reference electrode. The non-aqueous liquid electrolyte includes two or more kinds of anions, and a non-aqueous liquid electrolyte for the non-aqueous liquid electrolyte secondary battery.
    Type: Application
    Filed: February 22, 2010
    Publication date: December 13, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Fuminori Mizuno, Hirofumi Nakamoto, Kenichi Hamamoto
  • Patent number: 8283388
    Abstract: A main object of the present invention is to provide a method for producing a solid electrolyte material-containing sheet excellent in strength. The present invention attains the object by providing a method for producing a solid electrolyte material-containing sheet comprising the steps of: preparing a raw material composition containing a sulfide solid electrolyte material and a binder composition containing a monomer or oligomer having a double bond and a radical polymerization initiator; applying the raw material composition to form a sheet-shaped composition; and polymerizing the sheet-shaped composition by radical polymerization.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: October 9, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hirofumi Nakamoto, Yukiyoshi Ueno, Shigenori Hama, Yasushi Tsuchida, Hiroshi Nagase, Masato Kamiya, Satoshi Wakasugi
  • Publication number: 20120177997
    Abstract: A main object of the present invention is to provide a method for producing a solid electrolyte material-containing sheet excellent in strength. The present invention attains the object by providing a method for producing a solid electrolyte material-containing sheet comprising the steps of: preparing a raw material composition containing a sulfide solid electrolyte material and a binder composition containing a monomer or oligomer having a double bond and a radical polymerization initiator; applying the raw material composition to form a sheet-shaped composition; and polymerizing the sheet-shaped composition by radical polymerization.
    Type: Application
    Filed: February 9, 2009
    Publication date: July 12, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirofumi Nakamoto, Yukiyoshi Ueno, Shigenori Hama, Yasushi Tsuchida, Hiroshi Nagase, Masato Kamiya, Satoshi Wakasugi