Patents by Inventor Ryuichi Natsui

Ryuichi Natsui 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: 11271200
    Abstract: A positive-electrode active material contains a lithium composite oxide, wherein the lithium composite oxide is a multiphase mixture including a first phase, of which a crystal structure belongs to a space group Fm-3m, and a second phase, of which a crystal structure belongs to a space group Fd-3m; and in an XRD pattern of the lithium composite oxide, the integrated intensity ratio I(18°-20°)/I(43°-46°) of a first maximum peak I(18°-20°) within a first range of 18 degrees to 20 degrees at a diffraction angle 2? to a second maximum peak I(43°-46°) within a second range of 43 degrees to 46 degrees at the diffraction angle 2? satisfies 0.05?I(18°-20°)/I(43°-46°)?0.90.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: March 8, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Ryuichi Natsui, Kensuke Nakura, Junko Matsushita, Issei Ikeuchi
  • Patent number: 11233237
    Abstract: A positive electrode active material contains a lithium composite oxide containing fluorine and oxygen. The lithium composite oxide satisfies 1<Zs/Za<8, where Zs represents a first ratio of a molar quantity of fluorine to a total molar quantity of fluorine and oxygen in XPS of the lithium composite oxide, and Za represents a second ratio of a molar quantity of fluorine to a total molar quantity of fluorine and oxygen in an average composition of the lithium composite oxide. An XRD pattern of the lithium composite oxide includes a first maximum peak within a first range of 18° to 20° at a diffraction angle 2? and a second maximum peak within a second range of 43° to 46° at the diffraction angle 2?. The ratio I(18°-20°)/I(43°-46°) of a first integrated intensity I(18°-20°) of the first maximum peak to a second integrated intensity I(43°-46°) of the second maximum peak satisfies 0.05?I(18°-20°)/I(43°-46°)?0.90.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: January 25, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takanori Omae, Ryuichi Natsui, Takayuki Ishikawa, Kensuke Nakura
  • Patent number: 11228033
    Abstract: Provided is a cathode active material comprising a lithium composite oxide and a covering material which covers a surface of the lithium composite oxide. The lithium composite oxide is a multi-phase mixture including a first phase having a crystal structure which belongs to a monoclinic crystal; a second phase having a crystal structure which belongs to a hexagonal crystal; and a third phase having a crystal structure which belongs to a cubical crystal. The lithium composite oxide has an integral intensity ratio I(18°-20°)/I(43°-46°) of not less than 0.05 and not more than 0.99, where the integral intensity I(?°-?°) is an integral intensity of a peak which is a maximum peak present within a range of a diffraction angle 2? of not less than ?° and not more than ?° in an X-ray diffraction pattern of the lithium composite oxide. The covering material has an electronic conductivity of not more than 106 S/m.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: January 18, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kensuke Nakura, Ryuichi Natsui, Shuhei Uchida, Takuji Tsujita
  • Patent number: 11201319
    Abstract: A positive electrode active material contains a lithium composite oxide and a covering material. The lithium composite oxide has a crystal structure that belongs to space group Fd-3m. The ration I(111)/I(400) of a first integrated intensity I(111) of a first peak corresponding to a (111) plane to a second integrated intensity I(400) of a second peak corresponding to a (400) plane in an XRD pattern of the lithium composite oxide satisfies 0.05?I(111)/I(400)?0.90. The covering material has an electron conductivity of 106 S/m or less.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: December 14, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takayuki Ishikawa, Ryuichi Natsui, Kensuke Nakura
  • Patent number: 11183684
    Abstract: A cathode active material includes a lithium composite oxide and a covering material which covers a surface of the lithium composite oxide. The lithium composite oxide is a multi-phase mixture including a first phase having a crystal structure which belongs to a space group C2/m and a second phase having a crystal structure which belongs to a space group R-3m. The lithium composite oxide has an integral intensity ratio I(18°-20°)/I(43°-46°) of not less than 0.05 and not more than 1.15, where the integral intensity ratio I(18°-20°)/I(43°-46°) is a ratio of an integral intensity I(18°-20°) to an integral intensity I(43°-46°). The integral intensity I(?°-?°) is an integral intensity of a first peak which is a maximum peak present within a range of a diffraction angle 2? of not less than ?° and not more than ?° in an X-ray diffraction pattern of the lithium composite oxide.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: November 23, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takuji Tsujita, Kensuke Nakura, Shuhei Uchida, Ryuichi Natsui
  • Patent number: 11171327
    Abstract: A positive electrode active material includes a lithium composite oxide containing: at least one element selected from the group consisting of fluorine, chlorine, nitrogen, sulfur, bromine, and iodine; and a covering material that covers a surface of the lithium composite oxide. The lithium composite oxide has a crystal structure that belongs to a space group R-3 m. The ratio I(003)/I(104) of a first integrated intensity I(003) of a first peak corresponding to a (003) plane to a second integrated intensity I(104) of a second peak corresponding to a (104) plane in an XRD pattern of the lithium composite oxide satisfies 0.62?I(003)/I(104) ?0.90. The covering material has an electron conductivity of 106S/m or less.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: November 9, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takayuki Ishikawa, Ryuichi Natsui, Issei Ikeuchi, Kensuke Nakura
  • Patent number: 11081687
    Abstract: A positive-electrode active material contains a compound represented by the following composition formula (1): LixMeyAzO?F???(1) where Me denotes one or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, Cu, Nb, Mo, Ti, Cr, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ru, and W, A denotes one or more elements selected from the group consisting of B, Si, and P, and the following conditions: 1.3?x?2.1, 0.8?y?1.3, 0<z?0.2, 1.8???2.9, and 0.1???1.2 are satisfied. A crystal structure of the compound belongs to a space group Fm-3m.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: August 3, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Ryuichi Natsui, Junko Matsushita, Kensuke Nakura
  • Publication number: 20210193999
    Abstract: A positive electrode active material according to the present disclosure includes: a lithium composite oxide which includes Mn and at least one selected from the group consisting of F, Cl, and N, and S. The lithium composite oxide has a crystalline structure which belongs to the space group Fd-3m, and a relationship 1.40?intensity ratio IMn1/IMn2?1.90 is satisfied. The intensity ratio IMn1/IMn2 is a ratio of an intensity IMn1 to an intensity IMn2. The intensity IMn1 and the intensity IMn2 are intensities of a first proximity peak and a second proximity peak, respectively, of the Mn in a radial distribution function of the Mn included in the lithium composite oxide.
    Type: Application
    Filed: February 3, 2021
    Publication date: June 24, 2021
    Inventors: TAKANORI OMAE, RYUICHI NATSUI, ISSEI IKEUCHI, KENSUKE NAKURA
  • Patent number: 11043661
    Abstract: A positive electrode active material contains a lithium composite oxyfluoride and an organosilicon compound binding to the lithium composite oxyfluoride. The organosilicon compound has insulation property.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: June 22, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takayuki Ishikawa, Ryuichi Natsui, Kensuke Nakura
  • Publication number: 20210167357
    Abstract: A positive electrode active material according to the present disclosure includes a lithium composite oxide that contains first particles having a crystal structure belonging to space group R-3m and second particles having a crystal structure belonging to space group C2/m. The crystal structure of the second particles has a larger amount of cation mixing than the crystal structure of the first particles. The second particles have a smaller particle size than the first particles. Mathematical Formula 0.05?integrated intensity ratio I(18°-20°)/I(43°-46°)?0.99 is satisfied. The integrated intensity ratio I(18°-20°)/I(43°-46°) is a ratio of the integrated intensity I(18°-20°) to the integrated intensity I(43°-46°). The integrated intensity I(A°-B°) is the integrated intensity of a maximum peak present in the range of angle of diffraction 2? greater than or equal to A° and less than or equal to B° in the X-ray diffraction pattern of the lithium composite oxide.
    Type: Application
    Filed: February 3, 2021
    Publication date: June 3, 2021
    Inventors: RYUICHI NATSUI, KENSUKE NAKURA
  • Publication number: 20210151740
    Abstract: A positive electrode active material according to the present disclosure includes a lithium composite oxide that contains at least one element selected from the group consisting of F, Cl, N, and S, and at least one element selected from the group consisting of Bi, La, Ce, Ga, Sr, Y, and Sn. Mathematical formula 0.05?integrated intensity ratio I(18°-20°)/I(43°-46°)?0.90 is satisfied. The integrated intensity ratio I(18°-20°)/I(43°-46°) is a ratio of an integrated intensity I(18°-20°) to an integrated intensity I(43°-46°). The integrated intensity I(A°-B°)is an integrated intensity of a maximum peak present in a range of angle of diffraction 2? greater than or equal to A° and less than or equal to B° in the X-ray diffraction pattern of the lithium composite oxide.
    Type: Application
    Filed: January 27, 2021
    Publication date: May 20, 2021
    Inventors: SHUHEI UCHIDA, RYUICHI NATSUI, KENSUKE NAKURA
  • Publication number: 20210143397
    Abstract: A positive electrode active material includes a lithium composite oxide having a crystal structure belonging to the space group Fd-3m and has an integrated intensity ratio I(18°-20°)/I(43°-46°) of greater than or equal to 0.05 and less than or equal to 0.90 and an integrated intensity ratio I(63°-65°)/I(17°-19°) of greater than or equal to 0.8 and less than or equal to 2.0. The integrated intensity ratio I(18°-20°)/I(43°-46°) is a ratio of an integrated intensity I(18°-20°) to an integrated intensity I(43°-46°). The integrated intensity ratio I(63°-65°)/I(17°-19°) is a ratio of an integrated intensity I(63°-65°) to an integrated intensity I(17°-19°). The integrated intensity I(A°-B°) is an integrated intensity of a maximum peak present in a range of angle of diffraction 2? greater than or equal to A° and less than or equal to B° in the X-ray diffraction pattern of the positive electrode active material.
    Type: Application
    Filed: January 20, 2021
    Publication date: May 13, 2021
    Inventors: SHUHEI UCHIDA, RYUICHI NATSUI, KENSUKE NAKURA
  • Publication number: 20210143424
    Abstract: A positive electrode active material includes a first lithium composite oxide and a second lithium composite oxide that covers at least a part of the surface of the first lithium composite oxide. The first lithium composite oxide includes at least one selected from the group consisting of F, Cl, N, and S. The first lithium composite oxide has a crystal structure belonging to a layered structure. The second lithium composite oxide has a crystal structure belonging to space group Fd-3m. The positive electrode active material has an integrated intensity ratio I(18°-20°)/I(43°-46°) of greater than or equal to 0.05 and less than or equal to 0.90.
    Type: Application
    Filed: January 20, 2021
    Publication date: May 13, 2021
    Inventors: SHUHEI UCHIDA, RYUICHI NATSUI, KENSUKE NAKURA
  • Publication number: 20210083274
    Abstract: A positive electrode active material includes a lithium composite oxide and a covering material that covers a surface of the lithium composite oxide. The covering material has an electron conductivity of 106 S/m or less. The lithium composite oxide is a multiphase mixture including a first phase having a first crystal structure that belongs to a space group Fm-3m and a second phase having a second crystal structure that belongs to a space group other than a space group Fm-3m. The ratio I(18°-20°)/I(43°-46°) of a first integrated intensity I(18°-20°) of a first maximum peak present at a first diffraction angle 2? of 18° or more and 20° or less to a second integrated intensity I(43°-46°) of a second maximum peak present at a second diffraction angle 2? of 43° or more and 46° or less in an XRD pattern of the lithium composite oxide satisfies 0.05?I(18°-20°)/I(45°-46°)?0.90.
    Type: Application
    Filed: December 1, 2020
    Publication date: March 18, 2021
    Inventors: Takayuki ISHIKAWA, Ryuichi NATSUI, Issei IKEUCHI, Kensuke NAKURA
  • Publication number: 20210074997
    Abstract: A positive electrode active material according to the present disclosure includes a lithium composite oxide that is a multiphase mixture including a first phase having a crystal structure belonging to a monoclinic crystal (e.g., space group C2/m), a second phase having a crystal structure belonging to a hexagonal crystal (e.g., space group R-3m), and a third phase having a crystal structure belonging to a cubic crystal (e.g., space group Fm-3m or space group Fd-3m). In addition, a battery according to an aspect of the present disclosure includes a positive electrode containing the positive electrode active material, a negative electrode, and an electrolyte. The positive electrode active material according to the present disclosure improves the capacity of the battery.
    Type: Application
    Filed: November 9, 2020
    Publication date: March 11, 2021
    Inventors: RYUICHI NATSUI, KENSUKE NAKURA
  • Publication number: 20210057717
    Abstract: A positive electrode active material according to the present disclosure includes a lithium composite oxide. The lithium composite oxide is a multiphase mixture including a first phase having a crystal structure belonging to space group C2/m and a second phase having a crystal structure belonging to space group R-3m and includes at least one selected from the group consisting of F, Cl, N, and S. In an XRD pattern of the lithium composite oxide, the integrated intensity ratio I(20°-23°)/I(18°-20°) of a second maximum peak present in a diffraction angle 2? range of greater than or equal to 20° and less than or equal to 23° to a first maximum peak present in a diffraction angle 2? range of greater than or equal to 18° and less than or equal to 20° satisfies 0.05?I(20°-23°)/I(18°-20°)?0.26.
    Type: Application
    Filed: November 4, 2020
    Publication date: February 25, 2021
    Inventors: RYUICHI NATSUI, KENSUKE NAKURA
  • Publication number: 20210057742
    Abstract: A positive electrode active material according to the present disclosure includes: a lithium composite oxide which contains Mn and at least one selected from the group consisting of F, Cl, and N, and S. The lithium composite oxide has a crystalline structure which belongs to a layered structure, and a relationship 0.95?intensity ratio IMn1/IMn2?1.75 is satisfied. The intensity ratio IMn1/IMn2 is a ratio of an intensity IMn1 to an intensity IMn2. The intensity IMn1 is an intensity of a first proximity peak of the Mn in a radial distribution function of the Mn contained in the lithium composite oxide. The intensity IMn2 is an intensity of a second proximity peak of the Mn in the radial distribution function of the Mn contained in the lithium composite oxide.
    Type: Application
    Filed: November 9, 2020
    Publication date: February 25, 2021
    Inventors: ISSEI IKEUCHI, RYUICHI NATSUI, KENSUKE NAKURA
  • 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: 20210005884
    Abstract: A positive-electrode active material containing a compound that has a crystal structure belonging to the space group FM-3M and is represented by the composition formula (1): LixMeyO?F???(1) wherein Me denotes one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, and Al, and the following conditions are satisfied. 1.3?x?2.2, 0.8?y?1.3, 1???2.93, 0.07???2.
    Type: Application
    Filed: September 22, 2020
    Publication date: January 7, 2021
    Inventors: Ryuichi NATSUI, Kensuke NAKURA