Patents by Inventor Takashi Ko

Takashi Ko 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: 11569493
    Abstract: A positive electrode including a positive electrode current collector, an intermediate layer disposed on the positive electrode current collector and including a conductive agent and inorganic particles, and a positive electrode mixture layer disposed on the intermediate layer and including a positive electrode active material and a hydrogen phosphate salt represented by the general formula MaHbPO4 (wherein a satisfies 1?a?2, b satisfies 1?b?2, and M includes at least one element selected from alkali metals and alkaline earth metals), the positive electrode satisfying 0.5?X?3.0, 1.0?Y?7.0, and 0.07?X/Y?3.0 wherein X is the mass ratio (mass %) of the hydrogen phosphate salt relative to the total mass of the positive electrode active material and Y is the mass ratio (mass %) of the conductive agent relative to the total mass of the intermediate layer.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: January 31, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takashi Ko, Yasunori Baba, Katsunori Yanagida, Nobuhiro Hirano, Fumiharu Niina
  • Patent number: 11522188
    Abstract: An advantage is to provide a non-aqueous electrolyte secondary battery with improved heat resistance. A positive electrode active material contains a lithium-transition metal composite oxide containing 80 mol % or more of Ni and 0.1 mol % to 1.5 mol % of B on the basis of the total number of moles of metal elements excluding Li, and B and at least one element (M1) selected from Groups 4 to 6 are present on at least the surfaces of particles of the composite oxide. When particles having a volume-based particle size larger than 70% particle size (D70) are first particles, and particles having a volume-based particle size smaller than 30% particle size (D30) are second particles, the molar fraction of M1 on the basis of the total number of moles of metallic elements excluding Li on the surfaces of the second particles is greater than that of the first particles.
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: December 6, 2022
    Assignees: PANASONIC HOLDINGS CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Natsumi Goto, Ryo Hanazaki
  • Publication number: 20220367869
    Abstract: A positive electrode active material that can achieve high thermal stability at low cost is provided. Provided is a positive electrode active material for a lithium ion secondary battery, the positive electrode active material containing a lithium-nickel-manganese composite oxide, in which metal elements constituting the lithium-nickel-manganese composite oxide include lithium (Li), nickel (Ni), manganese (Mn), cobalt (Co), titanium (Ti), niobium (Nb), and optionally zirconium (Zr), an amount of substance ratio of the elements is represented as Li:Ni:Mn:Co:Zr:Ti:Nb=a:b:c:d:e:f:g (provided that, 0.97?a?1.10, 0.80?b?0.88, 0.04?c?0.12, 0.04?d?0.10, 0?e?0.004, 0.003<f?0.030, 0.001<g?0.006, and b+c+d+e+f+g=1), and in the amount of substance ratio, (f+g)?0.030 and f>g are satisfied.
    Type: Application
    Filed: June 30, 2020
    Publication date: November 17, 2022
    Applicants: SUMITOMO METAL MINING CO., LTD., PANASONIC CORPORATION
    Inventors: Yuki Koshika, Haruki Kaneda, Sho Tsuruta, Takashi Ko, Fumiharu Niina
  • Publication number: 20220367852
    Abstract: A nonaqueous electrolyte secondary battery comprises a positive electrode that contains, as positive electrode active materials: (A) a lithium transition metal composite oxide that has a volume-based D50 of 0.6 ?m to 3 ?m and that consists of secondary particles comprising aggregated primary particles with an average particle diameter of 0.5 um or more or is configured of substantially one kind of particle; and (B) a lithium transition metal composite oxide that has a volume-based D50 of 6 ?m to 25 ?m and that consists of secondary particles, comprising aggregated primary particles with an average particle diameter of 0.3 ?m or less.
    Type: Application
    Filed: August 28, 2020
    Publication date: November 17, 2022
    Applicant: Panasonic Corporation
    Inventors: Keiichi Takahashi, Fumiharu Niina, Natsumi Goto, Takashi Ko
  • Publication number: 20220320490
    Abstract: This positive electrode active material for a nonaqueous electrolyte secondary battery includes a lithium transition metal composite oxide that contains at least 80 mol % of Ni with respect to the total number of moles of metal elements excluding Li. B is present at least on the surfaces of the particles of the composite oxide. When particles having a particle diameter larger than a volume-based particle diameter of 70% (D70) are defined as first particles and particles having a particle diameter smaller than a volume-based particle diameter of 30% (D30) are defined as second particles, the molar fraction of B with respect to the total number of moles of metal elements excluding Li in the second particles is higher than the molar fraction of B with respect to the total number of moles of metal elements excluding Li in the first particles.
    Type: Application
    Filed: August 28, 2020
    Publication date: October 6, 2022
    Applicant: Panasonic Corporation
    Inventors: Natsumi Goto, Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta
  • Publication number: 20220278325
    Abstract: This positive electrode active material for nonaqueous electrolyte secondary batteries is a positive electrode active material that comprises a lithium transition metal composite oxide containing at least 80 mol % Ni with reference to the total number of moles of metal elements excluding Li, and that has B present on the particle surface of at least this composite oxide. Assuming that a particle having a particle diameter larger than the 70% volume-based particle diameter (D70) is denoted as a first particle and a particle having a particle diameter smaller than the 30% volume-based particle diameter (D30) is denoted as a second particle, the mole fraction of B, with reference to the total number of moles of metal elements excluding Li, in the first particle is larger than the mole fraction of B, with reference to the total number of moles of metal elements excluding Li, in the second particle.
    Type: Application
    Filed: August 25, 2020
    Publication date: September 1, 2022
    Applicant: Panasonic Corporation
    Inventors: Natsumi Goto, Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta
  • Patent number: 11430983
    Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode containing a lithium transition metal oxide as a positive electrode active material, a negative electrode containing a carbon material as a negative electrode active material, and a nonaqueous electrolyte. The lithium transition metal oxide contains W and Si, and W and Si adhere to the surface of the carbon material constituting the negative electrode active material. The amount of W adhering to the surface of the carbon material is 2 times or less in terms of a molar ratio to the amount of Si adhering to the surface of the carbon material.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: August 30, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Fumiharu Niina, Takashi Ko, Katsunori Yanagida
  • Publication number: 20220271284
    Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries contains a lithium transition metal composite oxide that contains not less than 80% by mole of Ni relative to the total number of moles of metal elements other than Li; and Ti is present at least in the surfaces of particles of the composite oxide. With respect to this positive electrode active material, if particles having a volume-based particle diameter more than the 70% particle diameter (D70) are taken as first particles and particles having a volume-based particle diameter less than the 30% particle diameter (D30) are taken as second particles, the molar fraction (A2) of Ti relative to the total number of moles of metal elements in the surfaces of the second particles is higher than the molar fraction (A1) of Ti relative to the total number of moles of metal elements in the surfaces of the first particles.
    Type: Application
    Filed: July 21, 2020
    Publication date: August 25, 2022
    Applicant: Panasonic Corporation
    Inventors: Shinya Suzuki, Takashi Ko, Fumiharu Niina, Sho Tsuruta, Katsunori Yanagida, Natsumi Goto
  • Publication number: 20220166007
    Abstract: In a nonaqueous electrolyte secondary battery, a positive electrode contains a positive electrode active material A. The positive electrode active material A includes: a lithium transition metal composite oxide represented by a general formula of LiaNibCocMndAleMfOg (in the formula, M is at least one element selected from Groups IV, V, and VI, and 0.8?a?1.2, b?0.82, 0<c?0.08, 0.05?d?0.12, 0?e?0.05, 0.01?f?0.05, and 1?g?2 are satisfied) in the form of particles; a first layer composed of a lithium metal compound represented by a general formula of LixMyOz (in the formula, 1?x?4, 1?y?5, and 1?z?12 are satisfied) and formed on each particle surface of the lithium transition metal composite oxide; and a second layer composed of a boron compound and formed on the first layer. The first layer is formed over the entire particle surface of the lithium transition metal composite oxide without the second layer being interposed therebetween.
    Type: Application
    Filed: January 27, 2020
    Publication date: May 26, 2022
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Katsunori Yanagida
  • Publication number: 20210296638
    Abstract: Disclosed is a non-aqueous electrolyte secondary battery positive electrode that includes a positive electrode core and a positive electrode mixture layer disposed on the positive electrode core. The positive electrode mixture layer contains a positive electrode active material and carbon nanotubes. The positive electrode active material contains a lithium transition metal composite oxide (I) that either comprises secondary particles that are aggregates of primary particles having an average particle size of 1 ?m or greater, or is substantially composed of single particles, the lithium transition metal composite oxide (I) having a volume-based median diameter of 0.6 ?m to 6 ?m, and a lithium transition metal composite oxide (II) that comprises secondary particles that are aggregates of primary particles having an average particle size of less than 1 ?m, the lithium transition metal composite oxide (II) having a volume-based median diameter of 3 ?m to 25 ?m.
    Type: Application
    Filed: March 11, 2021
    Publication date: September 23, 2021
    Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kohei Kintsu, Takashi Ko, Natsumi Goto, Keiichi Takahashi, Fumiharu Niina, Sho Tsuruta, Ryo Hanazaki, Akira Tsujiko
  • Publication number: 20210288311
    Abstract: A positive electrode for nonaqueous electrolyte secondary batteries which contains a first positive electrode active material, a second positive electrode active material and a phosphoric acid compound. With respect to the first positive electrode active material, the volume per mass of pores having a pore diameter of 100 nm or less is 8 mm3/g or more. With respect to the second positive electrode active material, the volume per mass of pores having a pore diameter of 100 nm or less is 5 mm3/g or less. In addition, the volume per mass of pores having a pore diameter of 100 nm or less of the first positive electrode active material is four times or more the volume per mass of pores having a pore diameter of 100 nm or less of the second positive electrode active material.
    Type: Application
    Filed: September 15, 2017
    Publication date: September 16, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takashi Ko, Fumiharu Niina, Katsunori Yanagida
  • Publication number: 20210234151
    Abstract: A positive electrode material consists of composite particles. Each of the composite particles includes a base material particle, a film, and a carbon nanotube. The film covers at least a part of a surface of the base material particle. The base material particle includes a positive electrode active material. The film includes a boron oxide. The carbon nanotube includes a first portion and a second portion. The first portion is buried in the film. The second portion is exposed on a surface of the film.
    Type: Application
    Filed: January 21, 2021
    Publication date: July 29, 2021
    Applicants: Toyota Jidosha Kabushiki Kaisha, Panasonic Corporation
    Inventors: Ryo Hanazaki, Takashi Ko, Natsumi Goto, Sho Tsuruta, Kohei Kintsu
  • Patent number: 11005090
    Abstract: This non-aqueous electrolyte secondary battery is provided with: a wound electrode body which comprises a positive electrode, a negative electrode and a separator, and wherein the positive electrode and the negative electrode are wound into a roll, with the separator being interposed therebetween; and a non-aqueous electrolyte. The negative electrode comprises a negative electrode collector and a negative electrode mixture layer that is formed on the negative electrode collector. The negative electrode mixture layer contains graphite, a carbon material that has a BET specific surface area of 10 m2/g or more, said BET specific surface area being larger than that of the graphite, and a hydrophobic binder. The coverage of the particle surfaces of the carbon material by the binder is higher than the coverage of the particle surfaces of the graphite by the binder.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: May 11, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kouhei Tuduki, Takashi Ko, Fumiharu Niina, Katsunori Yanagida
  • Publication number: 20210135214
    Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery according to a configuration includes a lithium-transition metal composite oxide containing nickel (Ni) in an amount of greater than or equal to 80 mol %, in which boron (B) is present at least on a particle surface of the lithium-transition metal composite oxide. In the lithium-transition metal composite oxide, when particles having a larger particle size than a volume-based 70% particle size (D70) are first particles and particles having a smaller particle size than a volume-based 30% particle size (D30) are second particles, a coverage ratio of B on surfaces of the second particle is larger than a coverage ratio of B on surfaces of the first particle by 5% or greater.
    Type: Application
    Filed: October 27, 2020
    Publication date: May 6, 2021
    Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Natsumi Goto, Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Ryo Hanazaki
  • Publication number: 20210135213
    Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery according to a configuration includes a lithium-transition metal composite oxide containing nickel (Ni) in an amount of greater than or equal to 80 mol %, in which boron (B) is present at least on a particle surface of the lithium-transition metal composite oxide. In the lithium-transition metal composite oxide, when particles having a larger particle size than a volume-based 70% particle size (D70) are first particles and particles having a smaller particle size than a volume-based 30% particle size (D30) are second particles, a coverage ratio of B on surfaces of the first particles is larger than a coverage ratio of B on surfaces of the second particles by 5% or greater.
    Type: Application
    Filed: October 27, 2020
    Publication date: May 6, 2021
    Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Natsumi Goto, Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Ryo Hanazaki
  • Publication number: 20210098786
    Abstract: An advantage is to provide a non-aqueous electrolyte secondary battery with improved heat resistance. A positive electrode active material contains a lithium-transition metal composite oxide containing 80 mol % or more of Ni and 0.1 mol % to 1.5 mol % of B on the basis of the total number of moles of metal elements excluding Li, and B and at least one element (M1) selected from Groups 4 to 6 are present on at least the surfaces of particles of the composite oxide. When particles having a volume-based particle size larger than 70% particle size (D70) are first particles, and particles having a volume-based particle size smaller than 30% particle size (D30) are second particles, the molar fraction of M1 on the basis of the total number of moles of metallic elements excluding Li on the surfaces of the second particles is greater than that of the first particles.
    Type: Application
    Filed: September 22, 2020
    Publication date: April 1, 2021
    Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Natsumi Goto, Ryo Hanazaki
  • Patent number: 10923713
    Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide, at least one element of a group 5 element and group 6 element in the periodic table, and a phosphoric acid compound. The nonaqueous electrolyte contains a lithium salt containing a P—O bond and a P—F bond.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: February 16, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Fumiharu Niina, Takashi Ko, Katsunori Yanagida
  • Patent number: 10910633
    Abstract: A nonaqueous electrolyte secondary battery in which low-crystalline carbon-covered graphite is used as negative electrode active material, wherein a cobalt-containing lithium transitional metal oxide is used for: a first positive electrode active material in which the volume per unit mass of pores having a pore size of 100 nm or less is 8 mm3/g or greater; and a second positive electrode active material in which the volume per unit mass of pores having a pore size of 100 nm or less is 5 mm3/g or less.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: February 2, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takashi Ko, Fumiharu Niina, Katsunori Yanagida, Yasunori Baba, Yuki Morikawa
  • Patent number: 10892472
    Abstract: A non-aqueous electrolyte secondary battery which uses a lithium titanium composite oxide as a negative electrode active material is configured to use a first positive electrode active material that is a Co-containing lithium transition metal oxide and has a volume per mass of 8 mm3/g or more with respect to pores having a pore diameter of 100 nm or less and a second positive electrode active material that has a volume per mass of 5 mm3/g or less with respect to pores having a pore diameter of 100 nm or less.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: January 12, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuki Morikawa, Yasunori Baba, Takashi Ko, Fumiharu Niina, Katsunori Yanagida
  • Patent number: 10868299
    Abstract: The present invention relates to a non-aqueous electrolyte secondary cell comprising: a positive electrode having a positive electrode mixture layer that contains a first positive-electrode active material and a second positive-electrode active material; a negative electrode containing a lithium-titanium composite oxide as a negative-electrode active material; and a non-aqueous electrolyte. The volume per mass of pores in the first positive-electrode active material having a pore diameter of 100 nm or less is four or more times the volume per mass of pores in the second positive-electrode active material having a pore diameter of 100 nm or less. The content of the first positive-electrode active material is 30 mass % or less with respect to the total amount of the first positive-electrode active material and the second positive-electrode active material.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: December 15, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yasunori Baba, Takashi Ko, Fumiharu Niina, Katsunori Yanagida