Patents by Inventor ISSEI IKEUCHI

ISSEI IKEUCHI 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: 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
  • 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: 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
  • Patent number: 10886529
    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(43°-46°)?0.90.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: January 5, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takayuki Ishikawa, Ryuichi Natsui, Issei Ikeuchi, Kensuke Nakura
  • Patent number: 10854876
    Abstract: A positive-electrode active material contains a compound represented by the following composition formula (1): LixMeyO?X???(1) where Me denotes one or more elements selected from the group consisting of Mn, Ni, Co, Fe, Al, Sn, Cu, Nb, Mo, Bi, Ti, V, Cr, Y, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, Ta, W, La, Ce, Pr, Sm, Eu, Dy, and Er, X denotes two or more elements selected from the group consisting of F, Cl, Br, I, N, and S, and x, y, ?, and ? satisfy 0.75?x?2.25, 0.75?y?1.50, 1??<3, and 0<??2, respectively. A crystal structure of the compound belongs to a space group Fm-3m.
    Type: Grant
    Filed: February 18, 2019
    Date of Patent: December 1, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Issei Ikeuchi, Ryuichi Natsui, Kensuke Nakura
  • Patent number: 10840499
    Abstract: A positive electrode active material comprising: a compound which has a crystal structure belonging to space group Fm-3m and which is represented by the following composition formula: LixMeyO?X?. In the formula, the Me represents one or more elements selected from the group consisting of Mn, Ni, Co, Fe, Al, Sn, Cu, Nb, Mo, Bi, Ti, V, Cr, Y, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, Ta, W, La, Ce, Pr, Sm, Eu, Dy, and Er. The X represents one element selected from the group consisting of Cl, Br, I, N, and S. The following conditions are satisfied: 0.5?x?1.5; 0.5?y?1.0; 1??<2; and 0<??1.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: November 17, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Issei Ikeuchi, Ryuichi Natsui, Kensuke Nakura
  • Publication number: 20200083529
    Abstract: A positive-electrode active material contains a lithium composite oxide containing manganese. The crystal structure of the lithium composite oxide belongs to a space group Fd-3m. The integrated intensity ratio I(111)/I(400) of a first peak I(111) on the (111) plane to a second peak I(400) on the (400) plane in an XRD pattern of the lithium composite oxide satisfies 0.05?I(111)/I(400)?0.90.
    Type: Application
    Filed: November 14, 2019
    Publication date: March 12, 2020
    Inventors: RYUICHI NATSUI, KENSUKE NAKURA, JUNKO MATSUSHITA, ISSEI IKEUCHI
  • Patent number: 10586981
    Abstract: A positive electrode active material for a battery, the positive electrode active material comprising a compound having a crystal structure of space group Fm-3m and represented by composition formula (1): LixMe1?Me2?O2 . . . (1). In the formula, Me1 represents one or more elements selected from the group consisting of Mn, Ni, Co, Fe, Al, Sn, Cu, Nb, Mo, Bi, Ti, V, Cr, Y, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, Ta, W, La, Ce, Pr, Sm, Eu, Dy, and Er, Me2 represents one or more elements selected from the group consisting of B, Si, and P, and the following conditions are met: 0<?; 0<?; ?+?=y; 0.5?x/y?3.0; and 1.5?x+y?2.3.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: March 10, 2020
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Issei Ikeuchi, Ryuichi Natsui, Kensuke Nakura
  • Publication number: 20200044249
    Abstract: A positive-electrode active material contains a lithium composite oxide containing at least one selected from the group consisting of F, Cl, N, and S. The crystal structure of the lithium composite oxide belongs to a space group C2/m. An XRD pattern of the lithium composite oxide comprises a first peak within the first range of 44 degrees to 46 degrees of a diffraction angle 2? and a second peak within the second range of 18 degrees to 20 degrees of the diffraction angle 2?. The ratio of the second integrated intensity of the second peak to the first integrated intensity of the first peak is within a range of 0.05 to 0.90.
    Type: Application
    Filed: October 9, 2019
    Publication date: February 6, 2020
    Inventors: RYUICHI NATSUI, KENSUKE NAKURA, JUNKO MATSUSHITA, ISSEI IKEUCHI
  • Publication number: 20200020943
    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: Application
    Filed: September 3, 2019
    Publication date: January 16, 2020
    Inventors: RYUICHI NATSUI, KENSUKE NAKURA, JUNKO MATSUSHITA, ISSEI IKEUCHI
  • Publication number: 20200006749
    Abstract: A positive-electrode active material contains a lithium composite oxide containing at least one selected from the group consisting of fluorine, chlorine, nitrogen, sulfur, bromine, and iodine. The crystal structure of the lithium composite oxide belongs to the space group R-3m. The integrated intensity ratio I(003)/I(104) of a peak intensity I(003) on the (003) plane to a peak intensity I(104) on the (104) plane in an XRD pattern of the lithium composite oxide satisfies 0.62?I(003)/I(104)?0.90.
    Type: Application
    Filed: September 3, 2019
    Publication date: January 2, 2020
    Inventors: ISSEI IKEUCHI, RYUICHI NATSUI, KENSUKE NAKURA
  • Publication number: 20190221837
    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-3m. The ratio |(003)/|(104) of a first integrated intensity ||(003) of a first peak corresponding to a (003) plane to a second integrated intensity ||(104) of a second peak corresponding to a (104) plane in an XRD pattern of the lithium composite oxide satisfies 0.62?|(003)/|(104)?0.90.
    Type: Application
    Filed: December 7, 2018
    Publication date: July 18, 2019
    Inventors: TAKAYUKI ISHIKAWA, RYUICHI NATSUI, ISSEI IKEUCHI, KENSUKE NAKURA
  • Publication number: 20190221838
    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(43°-46°)?0.90.
    Type: Application
    Filed: December 10, 2018
    Publication date: July 18, 2019
    Inventors: Takayuki Ishikawa, Ryuichi Natsui, Issei Ikeuchi, Kensuke Nakura
  • Publication number: 20190181443
    Abstract: A positive-electrode active material contains a compound represented by the following composition formula (1): LixMeyO?X???(1) where Me denotes one or more elements selected from the group consisting of Mn, Ni, Co, Fe, Al, Sn, Cu, Nb, Mo, Bi, Ti, V, Cr, Y, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, Ta, W, La, Ce, Pr, Sm, Eu, Dy, and Er, X denotes two or more elements selected from the group consisting of F, Cl, Br, I, N, and S, and x, y, ?, and ? satisfy 0.75?x?2.25, 0.75?y?1.50, 1??<3, and 0<??2, respectively. A crystal structure of the compound belongs to a space group Fm-3m.
    Type: Application
    Filed: February 18, 2019
    Publication date: June 13, 2019
    Inventors: ISSEI IKEUCHI, RYUICHI NATSUI, KENSUKE NAKURA
  • Publication number: 20180138496
    Abstract: A positive electrode active material comprising: a compound which has a crystal structure belonging to space group Fm-3m and which is represented by the following composition formula: LixMeyO?X?. In the formula, the Me represents one or more elements selected from the group consisting of Mn, Ni, Co, Fe, Al, Sn, Cu, Nb, Mo, Bi, Ti, V, Cr, Y, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, Ta, W, La, Ce, Pr, Sm, Eu, Dy, and Er. The X represents one element selected from the group consisting of Cl, Br, I, N, and S. The following conditions are satisfied: 0.5?x?1.5; 0.5?y?1.0; 1??<2; and 0<??1.
    Type: Application
    Filed: September 12, 2017
    Publication date: May 17, 2018
    Inventors: ISSEI IKEUCHI, RYUICHI NATSUI, KENSUKE NAKURA
  • Publication number: 20180090757
    Abstract: A positive electrode active material for a battery, the positive electrode active material comprising a compound having a crystal structure of space group Fm-3m and represented by composition formula (1): LixMe1?Me2?O2 . . . (1). In the formula, Me1 represents one or more elements selected from the group consisting of Mn, Ni, Co, Fe, Al, Sn, Cu, Nb, Mo, Bi, Ti, V, Cr, Y, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, Ta, W, La, Ce, Pr, Sm, Eu, Dy, and Er, Me2 represents one or more elements selected from the group consisting of B, Si, and P, and the following conditions are met: 0<?; 0<?; ?+?=y; 0.5?x/y?3.0; and 1.5?x+y?2.3.
    Type: Application
    Filed: July 12, 2017
    Publication date: March 29, 2018
    Inventors: ISSEI IKEUCHI, RYUICHI NATSUI, KENSUKE NAKURA
  • Publication number: 20170244104
    Abstract: A cathode active material contains a compound having a crystal structure of space group FM-3M, represented by composition formula (1), and having a half-width in 2? of 0.9° or more and 2.4° or less for a (200) diffraction peak in powder X-ray diffraction (XRD): LixMeyO2. . . (1). In the formula, Me represents one or two or more elements selected from the group consisting of Mn, Nb, Ti, Ni, Co, Fe, Sn, Cu, Mo, Bi, V, and Cr. In addition to this, the following conditions are met: 0.5?x/y?3.0; and 1.5?x+y?2.3.
    Type: Application
    Filed: January 16, 2017
    Publication date: August 24, 2017
    Inventors: RYUICHI NATSUI, ISSEI IKEUCHI, KENSUKE NAKURA
  • Publication number: 20170244103
    Abstract: A cathode active material contains a compound having a crystal structure of space group FM-3M and represented by composition formula (1): LixMeyO2 . . . (1). In the formula, Me represents any of the following: Mn; Mn and one or two or more elements selected from the group consisting of Co, Fe, Sn, Cu, Mo, Bi, V, and Cr; Ni, Mn, and one or two or more elements selected from the group consisting of Co, Fe, Sn, Cu, Mo, Bi, V, and Cr; and one or two or more elements selected from the group consisting of Ni, Co, Fe, Sn, Cu, Mo, Bi, V, and Cr. In addition to this, the following conditions are met: 0.5?x/y?3.0; and 1.5?x+y?2.3.
    Type: Application
    Filed: January 16, 2017
    Publication date: August 24, 2017
    Inventors: RYUICHI NATSUI, ISSEI IKEUCHI, KENSUKE NAKURA