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).
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Publication number: 20200411849Abstract: 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: ApplicationFiled: September 16, 2020Publication date: December 31, 2020Inventors: Takayuki NAKATSUTSUMI, Ryuichi NATSUI, Nobuhiko HOJO
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Publication number: 20200411848Abstract: 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: ApplicationFiled: September 14, 2020Publication date: December 31, 2020Inventors: Takayuki NAKATSUTSUMI, Ryuichi NATSUI, Nobuhiko HOJO
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Patent number: 10833315Abstract: 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: GrantFiled: November 15, 2017Date of Patent: November 10, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takayuki Nakatsutsumi, Ryuichi Natsui, Nobuhiko Hojo
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Patent number: 10818912Abstract: 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: GrantFiled: November 16, 2017Date of Patent: October 27, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takayuki Nakatsutsumi, Ryuichi Natsui, Nobuhiko Hojo
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Patent number: 10811672Abstract: 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: GrantFiled: November 15, 2017Date of Patent: October 20, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takayuki Nakatsutsumi, Ryuichi Natsui, Nobuhiko Hojo
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Patent number: 10559846Abstract: 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: GrantFiled: April 23, 2018Date of Patent: February 11, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takayuki Nakatsutsumi, Akira Kano, Junko Matsushita, Nobuhiko Hojo
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Patent number: 10497967Abstract: 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: GrantFiled: April 23, 2018Date of Patent: December 3, 2019Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Tetsuyuki Okano, Takayuki Nakatsutsumi, Mayumi Maenishi, Masahiro Takahata, Junko Matsushita, Akira Kano, Nobuhiko Hojo
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Patent number: 10153512Abstract: 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: GrantFiled: May 18, 2016Date of Patent: December 11, 2018Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Takayuki Nakatsutsumi, Mayumi Maenishi, Nobuhiko Hojo
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Publication number: 20180337398Abstract: 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: ApplicationFiled: May 8, 2018Publication date: November 22, 2018Inventors: MAYUMI MAENISHI, TAKAYUKI NAKATSUTSUMI, TETSUYUKI OKANO, NOBUHIKO HOJO
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Publication number: 20180337399Abstract: 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: ApplicationFiled: May 8, 2018Publication date: November 22, 2018Inventors: NOBUHIKO HOJO, TAKAYUKI NAKATSUTSUMI, TETSUYUKI OKANO, MAYUMI MAENISHI, MASAHIRO TAKAHATA
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Publication number: 20180337425Abstract: 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: ApplicationFiled: April 23, 2018Publication date: November 22, 2018Inventors: TAKAYUKI NAKATSUTSUMI, AKIRA KANO, JUNKO MATSUSHITA, NOBUHIKO HOJO
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Publication number: 20180337424Abstract: 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: ApplicationFiled: April 23, 2018Publication date: November 22, 2018Inventors: TAKAYUKI NAKATSUTSUMI, NOBUHIKO HOJO, AKIRA KANO, JUNKO MATSUSHITA
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Publication number: 20180337423Abstract: 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: ApplicationFiled: April 23, 2018Publication date: November 22, 2018Inventors: TETSUYUKI OKANO, TAKAYUKI NAKATSUTSUMI, MAYUMI MAENISHI, MASAHIRO TAKAHATA, JUNKO MATSUSHITA, AKIRA KANO, NOBUHIKO HOJO
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Patent number: 10050310Abstract: 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: GrantFiled: July 18, 2014Date of Patent: August 14, 2018Assignee: Panasonic CorporationInventors: Hirotetsu Suzuki, Nobuhiko Hojo, Takayuki Nakatsutsumi
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Publication number: 20180090790Abstract: 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: ApplicationFiled: November 15, 2017Publication date: March 29, 2018Inventors: TAKAYUKI NAKATSUTSUMI, RYUICHI NATSUI, NOBUHIKO HOJO
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Patent number: 9929431Abstract: 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: GrantFiled: May 19, 2016Date of Patent: March 27, 2018Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takayuki Nakatsutsumi, Mayumi Maenishi, Nobuhiko Hojo
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Publication number: 20180083313Abstract: 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: ApplicationFiled: November 15, 2017Publication date: March 22, 2018Inventors: TAKAYUKI NAKATSUTSUMI, RYUICHI NATSUI, NOBUHIKO HOJO
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Publication number: 20180076484Abstract: 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: ApplicationFiled: November 16, 2017Publication date: March 15, 2018Inventors: TAKAYUKI NAKATSUTSUMI, RYUICHI NATSUI, NOBUHIKO HOJO
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Patent number: 9653757Abstract: A nonaqueous electrolyte solution for a secondary battery includes: a nonaqueous solvent including a cyclic carbonate having at least one fluoro group on a side chain thereof, a chain carbonate, and trimethylacetonitrile; and a lithium salt dissolved in the nonaqueous solvent.Type: GrantFiled: December 26, 2013Date of Patent: May 16, 2017Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Takayuki Nakatsutsumi, Takashi Takeuchi, Takanobu Chiga, Miyuki Nakai
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Patent number: 9640840Abstract: A sodium secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolytic solution including a non-aqueous solvent. The non-aqueous solvent includes a fluoro group-containing chain carboxylic acid ester represented by General Formula (1): wherein R1 is an aromatic group, an unsaturated aliphatic group or a saturated aliphatic group; R2, R3 and R4 are each a hydrogen atom, an aromatic group, an unsaturated aliphatic group or a saturated aliphatic group; and at least one of R1, R2, R3 and R4 includes one or more fluoro groups.Type: GrantFiled: November 25, 2014Date of Patent: May 2, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takayuki Nakatsutsumi, Nobuhiko Hojo, Hirotetsu Suzuki, Yu Otsuka