Patents by Inventor TAKAYUKI NAKATSUTSUMI

TAKAYUKI NAKATSUTSUMI 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: 20210218064
    Abstract: A secondary battery includes a negative electrode containing a lithium silicate phase and silicon particles dispersed in the lithium silicate phase and an electrolytic solution containing a fluorine-containing linear carboxylic acid ester represented by R1—(CO)O—CH2—R2 (wherein R1 is an alkyl group and R2 is an alkyl group in which at least one hydrogen atom is substituted with fluorine).
    Type: Application
    Filed: February 21, 2019
    Publication date: July 15, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kazuhiro Iida, Takayuki Nakatsutsumi, 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: 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: 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: 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: 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: 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: 20180337424
    Abstract: A negative-electrode active material comprises: a graphite including boron; and a covering layer that covers a surface of the graphite. The covering layer comprises carbon. A ratio R satisfies 0?R?0.001, where R=SB/(SB+SC), and SB denotes a total peak area of a boron 1 s spectrum of the negative-electrode active material obtained by X-ray photoelectron spectroscopy, and SC denotes a total peak area of a carbon 1 s spectrum of the negative-electrode active material obtained by X-ray photoelectron spectroscopy.
    Type: Application
    Filed: April 23, 2018
    Publication date: November 22, 2018
    Inventors: TAKAYUKI NAKATSUTSUMI, NOBUHIKO HOJO, AKIRA KANO, JUNKO MATSUSHITA
  • Publication number: 20180337399
    Abstract: A negative electrode active material for a nonaqueous secondary battery includes graphite containing boron. The graphite has an average discharge potential of 0.16 V or more and 0.2 V or less, based on Li. A nonaqueous secondary battery includes: a positive electrode including a positive electrode active material capable of occluding and releasing an alkali metal ion; a negative electrode including a negative electrode active material above; and a nonaqueous electrolyte solution.
    Type: Application
    Filed: May 8, 2018
    Publication date: November 22, 2018
    Inventors: NOBUHIKO HOJO, TAKAYUKI NAKATSUTSUMI, TETSUYUKI OKANO, MAYUMI MAENISHI, MASAHIRO TAKAHATA
  • Publication number: 20180337398
    Abstract: A negative electrode active material for a nonaqueous secondary battery includes graphite containing boron. The graphite has a crystallite size Lc of 100 nm or more in the c-axis direction, In a Raman spectrum obtained by Raman spectroscopy of a surface of the graphite, a ratio R is 0.4 or more, the ratio R being a ratio of a maximum peak value Id of Raman intensity of a D band appearing in a Raman shift range of 1300 cm?1 or more and 1400 cm?1 or less to a maximum peak value Ig of Raman intensity of a G band appearing in a Raman shift range of 1500 cm?1 or more and 1650 cm?1 or less.
    Type: Application
    Filed: May 8, 2018
    Publication date: November 22, 2018
    Inventors: MAYUMI MAENISHI, TAKAYUKI NAKATSUTSUMI, TETSUYUKI OKANO, NOBUHIKO HOJO
  • Publication number: 20180337423
    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: Application
    Filed: April 23, 2018
    Publication date: November 22, 2018
    Inventors: TETSUYUKI OKANO, TAKAYUKI NAKATSUTSUMI, MAYUMI MAENISHI, MASAHIRO TAKAHATA, JUNKO MATSUSHITA, AKIRA KANO, NOBUHIKO HOJO
  • Publication number: 20180337425
    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: Application
    Filed: April 23, 2018
    Publication date: November 22, 2018
    Inventors: TAKAYUKI NAKATSUTSUMI, AKIRA KANO, JUNKO MATSUSHITA, NOBUHIKO HOJO
  • Patent number: 10050310
    Abstract: A non-aqueous electrolytic solution of the present invention includes: a solvent component including a glyme solvent and a phosphazene solvent; and an alkali metal salt composed of an alkali metal cation and an anion, the alkali metal salt being dissolved in the solvent component. The phosphazene solvent is a cyclic phosphazene compound represented by the formula (1). where X1 to X6 each independently represent a halogen atom or OR1, R1 is a substituted or unsubstituted aromatic group or a substituted or unsubstituted saturated aliphatic group, the aromatic group and the saturated aliphatic group each optionally contain a halogen atom, a nitrogen atom, an oxygen atom, a sulfur atom, or a silicon atom, and the saturated aliphatic group is linear or cyclic.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: August 14, 2018
    Assignee: Panasonic Corporation
    Inventors: Hirotetsu Suzuki, Nobuhiko Hojo, Takayuki Nakatsutsumi
  • Publication number: 20180090790
    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: November 15, 2017
    Publication date: March 29, 2018
    Inventors: TAKAYUKI NAKATSUTSUMI, RYUICHI NATSUI, NOBUHIKO HOJO
  • Patent number: 9929431
    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 cyclopropanecarbonitrile. A battery includes an electrolyte solution which contains a non-aqueous solvent containing cyclopropanecarbonitrile and an alkali metal salt dissolved in the non-aqueous solvent, 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 19, 2016
    Date of Patent: March 27, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takayuki Nakatsutsumi, Mayumi Maenishi, Nobuhiko Hojo
  • Publication number: 20180083313
    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: November 15, 2017
    Publication date: March 22, 2018
    Inventors: TAKAYUKI NAKATSUTSUMI, RYUICHI NATSUI, NOBUHIKO HOJO