Patents by Inventor Nobuhiko Hojo

Nobuhiko Hojo 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: 20210135277
    Abstract: An aqueous rechargeable battery includes: a positive electrode including a positive electrode current collector and a positive electrode active material layer provided on a surface of the positive electrode current collector; a negative electrode including a negative electrode current collector and a negative electrode active material layer provided on a surface of the negative electrode current collector; and an aqueous electrolyte solution containing a lithium salt and water. The positive electrode active material layer contains one or more positive electrode active materials and one or more lithium ion-conducting solid electrolytes; and the positive electrode active materials include a lithium transition metal oxide.
    Type: Application
    Filed: September 21, 2018
    Publication date: May 6, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Nobuhiko Hojo, Hiroyuki Matsumoto, Kenji Matsubara, Hiroshi Kawada, Atsushi Fukui
  • Publication number: 20210083324
    Abstract: A rechargeable battery including a positive electrode, a negative electrode, and an electrolyte solution is provided. The electrolyte solution contains water and one or more lithium salts, and the lithium salts include lithium fluorophosphate.
    Type: Application
    Filed: November 30, 2018
    Publication date: March 18, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kenji Matsubara, Nobuhiko Hojo, Hiroyuki Matsumoto, Takayuki Nakatsutsumi, Kazuhiro Iida, Atsushi Fukui
  • Publication number: 20210020911
    Abstract: Provided is a battery including: a positive electrode containing a positive electrode active material; a negative electrode; and an electrolyte solution containing a nonaqueous solvent. The positive electrode active material contains a compound represented by composition formula (1) below and having a crystal structure belonging to space group FM3-M: LixMeyO?F?. (1) Here, Me is one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and C. x, y, ?, and ? satisfy the following conditions: 1.7?x?2.2, 0.8?y?1.3, 1???2.5, and 0.5???2, respectively. The nonaqueous solvent includes at least one solvent selected from hydrofluoroethers, phosphazenes, phosphates, and perfluoropolyethers.
    Type: Application
    Filed: September 30, 2020
    Publication date: January 21, 2021
    Inventors: Hirotetsu SUZUKI, Ryuichi NATSUI, Nobuhiko HOJO
  • Publication number: 20210013488
    Abstract: A battery includes a positive electrode including a positive electrode active material, a negative electrode, and an electrolytic solution including a lithium hexafluorophosphate and an additive. The positive electrode active material includes a compound having a crystal structure belonging to a space group FM3-M and represented by Compositional Formula (1): LixMeyO?F?. The additive is at least one selected from the group consisting of difluorophosphates, tetrafluoroborates, bis(oxalate)borate salts, bis(trifluoromethanesulfonyl)imide salts, and bis(fluorosulfonyl)imide salts.
    Type: Application
    Filed: September 24, 2020
    Publication date: January 14, 2021
    Inventors: Takayuki NAKATSUTSUMI, Ryuichi NATSUI, Nobuhiko HOJO
  • Publication number: 20200411848
    Abstract: A battery includes a positive electrode including a positive electrode active material, a negative electrode, and an electrolytic solution including a nonaqueous solvent. The positive electrode active material includes a compound having a crystal structure belonging to a space group FM3-M and represented by Compositional Formula (1): LixMeyO?F?, where, Me is one or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and Cr; and subscripts x, y, ?, and ? satisfy the following requirements: 1.7?x?2.2, 0.8?y?1.3, 1???2.5, and 0.5???2. The nonaqueous solvent includes a solvent having at least one fluoro group.
    Type: Application
    Filed: September 14, 2020
    Publication date: December 31, 2020
    Inventors: Takayuki NAKATSUTSUMI, Ryuichi NATSUI, Nobuhiko HOJO
  • Publication number: 20200411849
    Abstract: A battery includes a positive electrode including a positive electrode active material, a negative electrode, and an electrolytic solution including an additive. The positive electrode active material includes a compound having a crystal structure belonging to a space group FM3-M and represented by Compositional Formula (1): LixMeyO?F?, where, Me is one or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and Cr; and subscripts x, y, ?, and ? satisfy the following requirements: 1.7?x?2.2, 0.8?y?1.3, 1???2.5, and 0.5???2. The additive is at least one selected from dinitrile compounds and diisocyanate compounds.
    Type: Application
    Filed: September 16, 2020
    Publication date: December 31, 2020
    Inventors: Takayuki NAKATSUTSUMI, Ryuichi NATSUI, Nobuhiko HOJO
  • Patent number: 10833316
    Abstract: Provided is a battery including: a positive electrode containing a positive electrode active material; a negative electrode; and an electrolyte solution containing a nonaqueous solvent. The positive electrode active material contains a compound represented by composition formula (1) below and having a crystal structure belonging to space group FM3-M: LixMeyO?F?. (1) Here, Me is one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and C. x, y, ?, and ? satisfy the following conditions: 1.7?x?2.2, 0.8?y?1.3, 1???2.5, and 0.5???2, respectively. The nonaqueous solvent includes at least one solvent selected from hydrofluoroethers, phosphazenes, phosphates, and perfluoropolyethers.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: November 10, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hirotetsu Suzuki, Ryuichi Natsui, Nobuhiko Hojo
  • Patent number: 10833315
    Abstract: A battery includes a positive electrode including a positive electrode active material, a negative electrode, and an electrolytic solution including a nonaqueous solvent. The positive electrode active material includes a compound having a crystal structure belonging to a space group FM3-M and represented by Compositional Formula (1): LixMeyO?F?, where, Me is one or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and Cr; and subscripts x, y, ?, and ? satisfy the following requirements: 1.7?x?2.2, 0.8?y?1.3, 1???2.5, and 0.5???2. The nonaqueous solvent includes a solvent having at least one fluoro group.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: November 10, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takayuki Nakatsutsumi, Ryuichi Natsui, Nobuhiko Hojo
  • Patent number: 10818912
    Abstract: A battery includes a positive electrode including a positive electrode active material, a negative electrode, and an electrolytic solution including a lithium hexafluorophosphate and an additive. The positive electrode active material includes a compound having a crystal structure belonging to a space group FM3-M and represented by Compositional Formula (1): LixMeyO?F?. The additive is at least one selected from the group consisting of difluorophosphates, tetrafluoroborates, bis(oxalate)borate salts, bis(trifluoromethanesulfonyl)imide salts, and bis(fluorosulfonyl)imide salts.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: October 27, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takayuki Nakatsutsumi, Ryuichi Natsui, Nobuhiko Hojo
  • Patent number: 10811672
    Abstract: A battery includes a positive electrode including a positive electrode active material, a negative electrode, and an electrolytic solution including an additive. The positive electrode active material includes a compound having a crystal structure belonging to a space group FM3-M and represented by Compositional Formula (1): LixMeyO?F?, where, Me is one or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and Cr; and subscripts x, y, ?, and ? satisfy the following requirements: 1.7?x?2.2, 0.8?y?1.3, 1???2.5, and 0.5???2. The additive is at least one selected from dinitrile compounds and diisocyanate compounds.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: October 20, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takayuki Nakatsutsumi, Ryuichi Natsui, Nobuhiko Hojo
  • Patent number: 10797315
    Abstract: An electrochemical device includes a negative electrode containing a negative electrode active material, a positive electrode, and an electrolyte. The negative electrode active material has a crystal structure with an Fm3m space group and contains a compound represented by composition formula (1) below, LixTiyOz ??Formula (1), where 0.4?x/y<2 and x/2+3y/2?z?x/2+2y.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: October 6, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Akira Kano, Junichi Sakamoto, Nobuhiko Hojo
  • Patent number: 10770719
    Abstract: A negative electrode active material includes a carbon material including boron and a silicon material including at least one selected from silicon and silicon oxide. The silicon material does not include boron. A peak of a B1s spectrum of the carbon material occurs at a binding energy of 187.0 eV or more and 192.0 eV or less, the B1s spectrum being measured by X-ray photoelectron spectroscopy. The ratio of the area of the peak of the B1s spectrum of the carbon material which occurs at a binding energy of 187.0 eV or more and 192.0 eV or less, the B1s spectrum being measured by X-ray photoelectron spectroscopy, to the total area of peaks of the B1s spectrum which occur at a binding energy of 184.0 eV or more and 196.5 eV or less is 50% or more.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: September 8, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Akira Kano, Junko Matsushita, Nobuhiko Hojo
  • Patent number: 10559846
    Abstract: A negative-electrode active material comprises a graphite including at least boron and fluorine. The fluorine is disposed at least on a surface of the graphite. A ratio R satisfies 0.5?R?1, where R=SBB/SB, and SB denotes a total peak area of a boron 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy, and SBB denotes a peak area of all spectra each having a peak in a binding energy range of not less than 184.0 eV and not more than 188.5 eV in the boron 1s spectrum.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: February 11, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takayuki Nakatsutsumi, Akira Kano, Junko Matsushita, Nobuhiko Hojo
  • Patent number: 10529997
    Abstract: A redox flow battery includes first and second electrodes, a separator separating the first and second electrodes, an active material, an electrolytic solution containing a redox species, and a circulation mechanism. The active material is insoluble in the electrolytic solution. The circulation mechanism circulates the electrolytic solution between the first electrode and the active material. The redox species performs oxidation and reduction at the first electrode and is oxidized and reduced by the active material. The circulation mechanism includes an electrolytic solution container containing the active material and a permeation preventing unit. The electrolytic solution is brought into contact with the active material in the electrolytic solution container, and the redox species is oxidized and reduced by the active material. The permeation preventing unit is disposed adjacent the outlet for the electrolytic solution of the electrolytic solution container and prevents permeation of the active material.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: January 7, 2020
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Nobuhiko Hojo
  • Patent number: 10497967
    Abstract: A negative-electrode active material comprises a graphite including boron and nitrogen. A ratio R1 satisfies 0.5?R1?1, where R1=SBN/SB, and SB denotes a total peak area of a boron 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy, and SBN denotes a peak area of a spectrum assigned to boron bonded to nitrogen in the boron 1s spectrum. A ratio R2 satisfies 0<R2?0.05, where R2=SB/(SB+SC+SN), and SC denotes a peak area of a carbon 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy, and SN denotes a peak area of a nitrogen 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: December 3, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Tetsuyuki Okano, Takayuki Nakatsutsumi, Mayumi Maenishi, Masahiro Takahata, Junko Matsushita, Akira Kano, Nobuhiko Hojo
  • Patent number: 10411303
    Abstract: A battery electrolyte comprises: a non-aqueous solvent including a perfluoropolyether that is functionalized at only one molecule end, the perfluoropolyether including perfluoroalkyl chains and oxygen atoms in such a manner that a perfluoroalkyl chain and an oxygen atom are alternately bound to each other; and a metal salt that is a magnesium salt, an alkaline earth metal salt, or an alkali metal salt, and that is dissolved in the non-aqueous solvent.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: September 10, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hirotetsu Suzuki, Nobuhiko Hojo
  • Patent number: 10403935
    Abstract: Provided is an electrolytic solution including a nonaqueous solvent and an alkali metal salt. The alkali metal salt is dissolved in the nonaqueous solvent. The nonaqueous solvent contains a perfluoropolyether having a weight-average molecular weight of 350 or more and less than 760. Also provided is a battery including the electrolytic solution, a positive electrode containing a positive electrode active material that can occlude and release an alkali metal cation, and a negative electrode containing a negative electrode active material that can occlude and release the alkali metal cation.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: September 3, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hirotetsu Suzuki, Nobuhiko Hojo
  • Patent number: 10270101
    Abstract: An electrolyte solution for a secondary lithium battery, the electrolyte solution including: a lithium salt, a non-aqueous organic solvent, and a phenanthroline-based compound having a polar substituent. The electrolyte solution enables production of a secondary lithium battery having a good high-temperature lifetime characteristics and good high-temperature preservation characteristics.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: April 23, 2019
    Assignee: Panasonic Corporation
    Inventors: Yu Otsuka, Nobuhiko Hojo, Jun-ichi Yoshida, Toshiki Nokami, Akihiro Shimizu
  • Patent number: 10153512
    Abstract: An electrolyte solution contains a non-aqueous solvent and an alkali metal salt dissolved in the non-aqueous solvent. The non-aqueous solvent contains a linear carboxylate represented by the following formula: where R1 and R2 independently represent an aromatic group, an unsaturated aliphatic group, or a saturated aliphatic group. A battery includes the electrolyte solution, a positive electrode containing a positive electrode active material that has a property of occluding and releasing an alkali metal ion, and a negative electrode containing an alkali metal or a negative electrode active material that has a property of occluding and releasing the alkali metal ion.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: December 11, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takayuki Nakatsutsumi, Mayumi Maenishi, Nobuhiko Hojo
  • Publication number: 20180337430
    Abstract: A nonaqueous electrolyte includes a nonaqueous solvent and an alkali metal salt dissolved in the nonaqueous solvent. The nonaqueous solvent contains a perfluoropolyether and a nitrile compound represented by a formula Rf—CN, where Rf represents a hydrocarbon group which has a carbon number of 2 to 4 and in which at least one hydrogen atom is substituted with fluorine.
    Type: Application
    Filed: March 27, 2018
    Publication date: November 22, 2018
    Inventors: HIROTETSU SUZUKI, NOBUHIKO HOJO