Patents by Inventor Kaoru Nagata

Kaoru Nagata 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: 12249711
    Abstract: A positive-electrode active material for a lithium-ion secondary battery, wherein an average pore size of the positive-electrode active material is 0.2 ?m to 1.0 ?m when a pore size is measured in a range of 0.0036 ?m to 400 ?m.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: March 11, 2025
    Assignees: SUMITOMO METAL MINING CO., LTD., Panasonic Energy Co., Ltd.
    Inventors: Ayumi Miura, Hiroyuki Fujimoto, Masanori Maekawa, Kaoru Nagata
  • Patent number: 12237506
    Abstract: In a non-aqueous electrolyte secondary battery that is one example of the embodiment, a positive electrode mix layer comprises a positive electrode active material comprising a lithium transition metal composite oxide represented by general formula: LiaNibCo(1-b-c)AlcOd (0.9<a?1.2, 0.88?b?0.96, 0.04?c?0.12, 1.9?d?2.1) and lithium carbonate in an amount of 0.1 to 1.0% by mass relative to the mass of the positive electrode active material. The lithium transition metal composite oxide has the form of secondary particles formed by the aggregation of primary particles, wherein tungsten is present, on the surface of each of the primary particles, in an amount of 0.05 to 0.20 mol % relative to the total molar amount of non-Li-metal elements contained in the positive electrode active material.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: February 25, 2025
    Assignee: PANASONIC ENERGY CO., LTD.
    Inventors: Masanori Maekawa, Takayuki Ishikawa, Kaoru Nagata
  • Patent number: 12237505
    Abstract: This positive electrode active material for non-aqueous electrolyte secondary batteries comprises: lithium transition metal oxide particles; a metal compound which contains a metal element M and adheres to the surfaces of the lithium transition metal oxide particles; and a lithium metal compound which contains lithium (Li) and the metal element M and adheres to the surfaces of the lithium transition metal oxide particles. In this connection, the metal element M is composed of at least one substance that is selected from among aluminum (Al), titanium (Ti), manganese (Mn), gallium (Ga), molybdenum (Mo), tin (Sn), tungsten (W) and bismuth (Bi).
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: February 25, 2025
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Koh Masahara, Kaoru Nagata, Takaya Tochio, Taizou Sunano, Akihiro Kawakita, Takeshi Ogasawara
  • Publication number: 20250021051
    Abstract: Provided is a timepiece dial and a timepiece. In a timepiece dial, a surface decoration including a plurality of protrusion portions is formed on a first main surface. In at least one of the protrusion portions, inclination angles of a first inclined surface that increases in height toward a vertex and a second inclined surface that decreases in height from the vertex are different in a first cross-section perpendicular to a first direction. In the first cross-section, two or more of the plurality of protrusion portions have different heights. There are two or more of the protrusion portions in a second cross-section perpendicular to a second direction perpendicular to the first direction along a first main surface.
    Type: Application
    Filed: July 10, 2024
    Publication date: January 16, 2025
    Inventors: Akiko ARAKI, Kaoru NAGATA, Yasunori HARA, Ayaka HARA
  • Publication number: 20240234712
    Abstract: A non-aqueous electrolyte secondary battery that is one aspect of the present disclosure is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte, the positive electrode having a positive electrode current collector and a positive electrode mixture layer that contains a positive electrode active material and that is formed on the surface of the positive electrode current collector, the positive electrode active material including a lithium-containing composite oxide represented by a prescribed general formula, the lithium-containing composite oxide having secondary particles formed by aggregation of primary particles, Ca being present on the surfaces and in the interiors of the secondary particles, and the proportion of Ca present on the surfaces of the secondary particles being 12-58% relative to the total amount of Ca present on the surfaces and in the interiors of the secondary particles.
    Type: Application
    Filed: February 22, 2022
    Publication date: July 11, 2024
    Applicant: Panasonic Energy Co., Ltd.
    Inventors: Takayuki Ishikawa, Kaoru Nagata, Masanori Maekawa
  • Publication number: 20240136517
    Abstract: A non-aqueous electrolyte secondary battery that is one aspect of the present disclosure is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte, the positive electrode having a positive electrode current collector and a positive electrode mixture layer that contains a positive electrode active material and that is formed on the surface of the positive electrode current collector, the positive electrode active material including a lithium-containing composite oxide represented by a prescribed general formula, the lithium-containing composite oxide having secondary particles formed by aggregation of primary particles, Ca being present on the surfaces and in the interiors of the secondary particles, and the proportion of Ca present on the surfaces of the secondary particles being 12-58% relative to the total amount of Ca present on the surfaces and in the interiors of the secondary particles.
    Type: Application
    Filed: February 22, 2022
    Publication date: April 25, 2024
    Applicant: Panasonic Energy Co., Ltd.
    Inventors: Takayuki Ishikawa, Kaoru Nagata, Masanori Maekawa
  • Patent number: 11811059
    Abstract: An object of the present disclosure is to provide a nonaqueous electrolyte secondary battery that can suppress lowering in capacity due to high-temperature storage of the battery. The nonaqueous electrolyte secondary battery (10) includes: a positive electrode (11) containing one or more positive electrode active materials; a negative electrode (12); and a nonaqueous electrolyte containing a fluorine compound, where: the positive electrode active materials include a complex oxide A containing Li, Ni, and W and a complex oxide B containing Li, Ni, and W as an optional element; W content in the complex oxide A is 5 mol % or more; W content in the complex oxide B is 0.5 mol % or less; and a mass ratio of the complex oxide A is 0.002% or more and 0.1% or less relative to the total of the complex oxide A and the complex oxide B.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: November 7, 2023
    Assignee: PANASONIC ENERGY CO., LTD.
    Inventors: Masahiro Kinoshita, Kaoru Nagata
  • Publication number: 20230317941
    Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries according to one embodiment of the present disclosure contains a lithium transition metal composite oxide which is represented by general formula LiaNibCocAldXeOf (wherein 0.9?a?1.2; 0.88?b?0.96; 0?c?0.12; 0?d?0.12; 0?e?0.1; 1.9?f?2.1; (b+c+d)=1; and X represents at least one element that is selected from among Mn, Mg, Ca, Sr, Ba, Ti, Zr, V, Nb, Ta, Mo, W and B); and the lithium transition metal composite oxide has a pore volume of pores having a pore diameter of 0.3 ?m or less of from 6×10?4 mL/g to 50×10?4 mL/g, while having a particle fracture strength of 120 MPa or more at the volume average particle diameter.
    Type: Application
    Filed: August 26, 2021
    Publication date: October 5, 2023
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Masanori Maekawa, Takayuki Ishikawa, Kaoru Nagata
  • Publication number: 20230282817
    Abstract: This cathode active material for a secondary battery using a non-aqueous electrolyte includes nickel-rich lithium transition-metal oxide, exhibits a hard X-ray photoelectron spectroscopy (HAXPES) peak of 1,560 to 1,565 eV in binding energy from an Al-rich layer, using a photon energy of 6 KeV, and with respect to the mean particle diameter r of the lithium transition-metal oxide particle, the Al concentration is approximately constant within 0.35 r of the center.
    Type: Application
    Filed: April 11, 2023
    Publication date: September 7, 2023
    Applicants: PANASONIC HOLDINGS CORPORATION, SANYO Electric Co., Ltd.
    Inventors: Miki Mizawa, Kaoru Nagata, Masanori Maekawa, Masahiro Kinoshita
  • Patent number: 11658295
    Abstract: This cathode active material for a secondary battery using a non-aqueous electrolyte includes nickel-rich lithium transition-metal oxide, exhibits a hard X-ray photoelectron spectroscopy (HAXPES) peak of 1,560 to 1,565 eV in binding energy from an Al-rich layer, using a photon energy of 6 KeV, and with respect to the mean particle diameter r of the lithium transition-metal oxide particle, the Al concentration is approximately constant within 0.35r of the center.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: May 23, 2023
    Assignees: PANASONIC HOLDINGS CORPORATION, SANYO Electric Co., Ltd.
    Inventors: Miki Mizawa, Kaoru Nagata, Masanori Maekawa, Masahiro Kinoshita
  • Publication number: 20230065283
    Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery according to an aspect of the present disclosure contains a lithium metal composite oxide having secondary particles formed by the aggregation of primary particles, wherein W is present on the surface and inside of the secondary particles of the lithium metal composite oxide. The amount of W present on the surface of the secondary particles of the lithium metal composite oxide represented by general formula Li?NiaCobAlcMdWeO? (in the formula, 0.9???1.2, 0.8?a?0.96, 0<b?0.10, 0<c?0.10, 0?d?0.1, 0.0003?e/(a+b+c+d+e)?0.002, 1.9???2.1, a+b+c+d=1, and M is at least one element selected from among Mn, Fe, Ti, Si, Nb, Zr, Mo, and Zn) is 25-45% of the total amount of W present on the surface and inside of the secondary particles of the lithium metal composite oxide.
    Type: Application
    Filed: January 22, 2021
    Publication date: March 2, 2023
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Takayuki Ishikawa, Kaoru Nagata, Masanori Maekawa
  • Patent number: 11456452
    Abstract: A positive electrode for a non-aqueous electrolyte secondary battery contains a first particle and a second particle. The first particle contains an electrochemically active positive-electrode active material, and the positive-electrode active material contains a lithium transition metal oxide. The second particle contains an electrochemically inactive metal oxide. An electrochemically inactive phosphate adheres to the surface of the second particle.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: September 27, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takaya Tochio, Kaoru Nagata, Takeshi Ogasawara
  • Publication number: 20220216470
    Abstract: In a non-aqueous electrolyte secondary battery that is one example of the embodiment, a positive electrode mix layer comprises a positive electrode active material comprising a lithium transition metal composite oxide represented by general formula: LiaNibCo(1-b-c)AlcOd (0.9<a?1.2, 0.88?b?0.96, 0.04?c?0.12, 1.9?d?2.1) and lithium carbonate in an amount of 0.1 to 1.0% by mass relative to the mass of the positive electrode active material. The lithium transition metal composite oxide has the form of secondary particles formed by the aggregation of primary particles, wherein tungsten is present, on the surface of each of the primary particles, in an amount of 0.05 to 0.20 mol % relative to the total molar amount of non-Li-metal elements contained in the positive electrode active material.
    Type: Application
    Filed: April 15, 2020
    Publication date: July 7, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Masanori Maekawa, Takayuki Ishikawa, Kaoru Nagata
  • Patent number: 10910631
    Abstract: A non-aqueous electrolyte secondary battery according to one mode of the present disclosure is provided with: a positive electrode including a positive-electrode active material layer; a negative electrode; and a non-aqueous electrolyte, wherein the positive-electrode active material layer includes positive-electrode active material particles having a particle size distribution in which the difference (D90-D10) between a 90% diameter (D90) and a 10% diameter (D10) measured with a laser diffraction method is larger than 13 ?m. In addition, the positive-electrode active material layer is characterized in that, on an arbitrarily defined cross section thereof, the total area of positive-electrode active material particles A, each of which has a particle size not smaller than 15 ?m and has a particle area at least 0.8-fold the area of a circle circumscribing the positive-electrode active material particle, is 20% or larger with respect to the total area of the cross section.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: February 2, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kaoru Nagata, Noriko Manabe
  • Publication number: 20200411860
    Abstract: An object of the present disclosure is to provide a nonaqueous electrolyte secondary battery that can suppress lowering in capacity due to high-temperature storage of the battery. The nonaqueous electrolyte secondary battery (10) includes: a positive electrode (11) containing one or more positive electrode active materials; a negative electrode (12); and a nonaqueous electrolyte containing a fluorine compound, where: the positive electrode active materials include a complex oxide A containing Li, Ni, and W and a complex oxide B containing Li, Ni, and W as an optional element; W content in the complex oxide A is 5 mol % or more; W content in the complex oxide B is 0.5 mol % or less; and a mass ratio of the complex oxide A is 0.002% or more and 0.1% or less relative to the total of the complex oxide A and the complex oxide B.
    Type: Application
    Filed: February 7, 2019
    Publication date: December 31, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Masahiro Kinoshita, Kaoru Nagata
  • Publication number: 20200295366
    Abstract: This positive electrode active material for non-aqueous electrolyte secondary batteries comprises: lithium transition metal oxide particles; a metal compound which contains a metal element M and adheres to the surfaces of the lithium transition metal oxide particles; and a lithium metal compound which contains lithium (Li) and the metal element M and adheres to the surfaces of the lithium transition metal oxide particles. In this connection, the metal element M is composed of at least one substance that is selected from among aluminum (Al), titanium (Ti), manganese (Mn), gallium (Ga), molybdenum (Mo), tin (Sn), tungsten (W) and bismuth (Bi).
    Type: Application
    Filed: January 26, 2017
    Publication date: September 17, 2020
    Applicants: Panasonic Intellectual Property Management Co., Ltd., Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Koh Masahara, Kaoru Nagata, Takaya Tochio, Taizou Sunano, Akihiro Kawakita, Takeshi Ogasawara
  • Patent number: 10714748
    Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries, which has high energy density and excellent cycle characteristics. A positive electrode active material for nonaqueous electrolyte secondary batteries of the present invention is represented by general formula LiNixCoyM(1-x-y)O2 (wherein M represents at least one element selected from among metal elements, 0.3?x<1.0 and 0<y?0.5) and is configured of particles, each of which is an aggregate of crystallites. Each particle has a compressive breaking strength of from 200 MPa to 500 MPa (inclusive), and the crystallite diameter in the vector direction of the particle is from 100 nm to 300 nm (inclusive).
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: July 14, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Hidekazu Hiratsuka, Kaoru Nagata, Tsutomu Nishioka, Tatsuhiko Suzuki
  • Publication number: 20200099050
    Abstract: A positive electrode for a non-aqueous electrolyte secondary battery contains a first particle and a second particle. The first particle is an electrochemically active positive-electrode active material, and the positive-electrode active material contains a lithium transition metal oxide. The second particle is an electrochemically inactive metal oxide and has a BET specific surface area in the range of 10 to 100 m2/g and a sphericity of 0.8 or more.
    Type: Application
    Filed: December 18, 2017
    Publication date: March 26, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takaya Tochio, Kaoru Nagata, Takeshi Ogasawara
  • Publication number: 20200020941
    Abstract: This cathode active material for a secondary battery using a non-aqueous electrolyte includes nickel-rich lithium transition-metal oxide, exhibits a hard X-ray photoelectron spectroscopy (HAXPES) peak of 1,560 to 1,565 eV in binding energy from an Al-rich layer, using a photon energy of 6 KeV, and with respect to the mean particle diameter r of the lithium transition-metal oxide particle, the Al concentration is approximately constant within 0.35 r of the center.
    Type: Application
    Filed: September 20, 2019
    Publication date: January 16, 2020
    Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.
    Inventors: Miki Mizawa, Kaoru Nagata, Masanori Maekawa, Masahiro Kinoshita
  • Publication number: 20190386299
    Abstract: A positive electrode for a non-aqueous electrolyte secondary battery contains a first particle and a second particle. The first particle contains an electrochemically active positive-electrode active material, and the positive-electrode active material contains a lithium transition metal oxide. The second particle contains an electrochemically inactive metal oxide. An electrochemically inactive phosphate adheres to the surface of the second particle.
    Type: Application
    Filed: December 14, 2017
    Publication date: December 19, 2019
    Applicants: Panasonic Intellectual Property Management Co., Ltd., Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takaya Tochio, Kaoru Nagata, Takeshi Ogasawara