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).
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Patent number: 12249711Abstract: 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: GrantFiled: September 16, 2020Date of Patent: March 11, 2025Assignees: SUMITOMO METAL MINING CO., LTD., Panasonic Energy Co., Ltd.Inventors: Ayumi Miura, Hiroyuki Fujimoto, Masanori Maekawa, Kaoru Nagata
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Patent number: 12237506Abstract: 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: GrantFiled: April 15, 2020Date of Patent: February 25, 2025Assignee: PANASONIC ENERGY CO., LTD.Inventors: Masanori Maekawa, Takayuki Ishikawa, Kaoru Nagata
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Patent number: 12237505Abstract: 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: GrantFiled: January 26, 2017Date of Patent: February 25, 2025Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Koh Masahara, Kaoru Nagata, Takaya Tochio, Taizou Sunano, Akihiro Kawakita, Takeshi Ogasawara
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Publication number: 20250021051Abstract: 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: ApplicationFiled: July 10, 2024Publication date: January 16, 2025Inventors: Akiko ARAKI, Kaoru NAGATA, Yasunori HARA, Ayaka HARA
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Publication number: 20240234712Abstract: 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: ApplicationFiled: February 22, 2022Publication date: July 11, 2024Applicant: Panasonic Energy Co., Ltd.Inventors: Takayuki Ishikawa, Kaoru Nagata, Masanori Maekawa
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Publication number: 20240136517Abstract: 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: ApplicationFiled: February 22, 2022Publication date: April 25, 2024Applicant: Panasonic Energy Co., Ltd.Inventors: Takayuki Ishikawa, Kaoru Nagata, Masanori Maekawa
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Patent number: 11811059Abstract: 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: GrantFiled: February 7, 2019Date of Patent: November 7, 2023Assignee: PANASONIC ENERGY CO., LTD.Inventors: Masahiro Kinoshita, Kaoru Nagata
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Publication number: 20230317941Abstract: 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: ApplicationFiled: August 26, 2021Publication date: October 5, 2023Applicant: SANYO Electric Co., Ltd.Inventors: Masanori Maekawa, Takayuki Ishikawa, Kaoru Nagata
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Publication number: 20230282817Abstract: 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: ApplicationFiled: April 11, 2023Publication date: September 7, 2023Applicants: PANASONIC HOLDINGS CORPORATION, SANYO Electric Co., Ltd.Inventors: Miki Mizawa, Kaoru Nagata, Masanori Maekawa, Masahiro Kinoshita
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Patent number: 11658295Abstract: 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: GrantFiled: September 20, 2019Date of Patent: May 23, 2023Assignees: PANASONIC HOLDINGS CORPORATION, SANYO Electric Co., Ltd.Inventors: Miki Mizawa, Kaoru Nagata, Masanori Maekawa, Masahiro Kinoshita
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Publication number: 20230065283Abstract: 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: ApplicationFiled: January 22, 2021Publication date: March 2, 2023Applicant: SANYO Electric Co., Ltd.Inventors: Takayuki Ishikawa, Kaoru Nagata, Masanori Maekawa
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Patent number: 11456452Abstract: 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: GrantFiled: December 14, 2017Date of Patent: September 27, 2022Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takaya Tochio, Kaoru Nagata, Takeshi Ogasawara
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Publication number: 20220216470Abstract: 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: ApplicationFiled: April 15, 2020Publication date: July 7, 2022Applicant: SANYO Electric Co., Ltd.Inventors: Masanori Maekawa, Takayuki Ishikawa, Kaoru Nagata
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Patent number: 10910631Abstract: 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: GrantFiled: February 1, 2017Date of Patent: February 2, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Kaoru Nagata, Noriko Manabe
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Publication number: 20200411860Abstract: 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: ApplicationFiled: February 7, 2019Publication date: December 31, 2020Applicant: SANYO Electric Co., Ltd.Inventors: Masahiro Kinoshita, Kaoru Nagata
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Publication number: 20200295366Abstract: 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: ApplicationFiled: January 26, 2017Publication date: September 17, 2020Applicants: 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
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Patent number: 10714748Abstract: 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: GrantFiled: March 8, 2018Date of Patent: July 14, 2020Assignee: SANYO Electric Co., Ltd.Inventors: Hidekazu Hiratsuka, Kaoru Nagata, Tsutomu Nishioka, Tatsuhiko Suzuki
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Publication number: 20200099050Abstract: 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: ApplicationFiled: December 18, 2017Publication date: March 26, 2020Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Takaya Tochio, Kaoru Nagata, Takeshi Ogasawara
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Publication number: 20200020941Abstract: 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: ApplicationFiled: September 20, 2019Publication date: January 16, 2020Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.Inventors: Miki Mizawa, Kaoru Nagata, Masanori Maekawa, Masahiro Kinoshita
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Publication number: 20190386299Abstract: 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: ApplicationFiled: December 14, 2017Publication date: December 19, 2019Applicants: Panasonic Intellectual Property Management Co., Ltd., Panasonic Intellectual Property Management Co., Ltd.Inventors: Takaya Tochio, Kaoru Nagata, Takeshi Ogasawara