Patents by Inventor Masataka OYAMA

Masataka OYAMA 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: 10897044
    Abstract: A cathode material for a lithium-ion secondary battery of the present invention is active material particles including central particles represented by General Formula LixAyDzPO4 (0.9<x<1.1, 0<y?1, 0?z<1, and 0.9<y+z<1.1; here, A represents at least one element selected from the group consisting of Co, Mn, Ni, Fe, Cu, and Cr, and D represents at least one element selected from the group consisting of Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, and Y) and a carbonaceous film that coats surfaces of the central particles, in which a coarse particle ratio in a particle size distribution is 35% or more and 65% or less.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: January 19, 2021
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Ryuuta Yamaya, Masataka Oyama
  • Patent number: 10818923
    Abstract: A cathode material for a lithium-ion secondary battery of the present invention is active material particles including central particles represented by LixAyMzPO4 and a carbonaceous film that coats surfaces of the central particles, in which a median diameter is 0.50 ?m or more and 0.80 ?m or less, and a chromaticity b* in an L*a*b* color space is 1.9 or more and 2.3 or less.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: October 27, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Masataka Oyama, Takao Kitagawa
  • Patent number: 10804529
    Abstract: An electrode material including a carbonaceous-coated electrode active material having primary particles of an electrode active material and secondary particles that are aggregates of the primary particles, and a carbonaceous film that coats the primary particles of the electrode active material and the secondary particles that are the aggregates of the primary particles, in which a proportion of a volume of micropores having a micropore diameter of 50 nm or less in a volume of micropores having a micropore diameter of 300 nm or less, which is obtained using a nitrogen adsorption method, is 40% or more.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: October 13, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kouji Oono, Satoru Oshitari, Masataka Oyama
  • Publication number: 20200287209
    Abstract: An electrode material including a carbonaceous-coated electrode active material having primary particles of the electrode active material and secondary particles that are aggregates of the primary particles, and a carbonaceous film that coats the primary particles of the electrode active material and the secondary particles that are the aggregates of the primary particles, in which a specific surface area, which is obtained using a nitrogen adsorption method, is 4 m2/g or more and 40 m2/g or less, a volume of micropores per unit mass is 0.05 cm3/g or more and 0.3 cm3/g or less, and an average micropore diameter, which is obtained from the volume of the micropores per unit mass and the specific surface area, is 26 nm or more and 90 nm or less.
    Type: Application
    Filed: September 4, 2019
    Publication date: September 10, 2020
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kouji Oono, Satoru Oshitari, Tsutomu Nozoe, Masataka Oyama
  • Patent number: 10693138
    Abstract: A cathode material is provided which comprises secondary particles of cathode active material particles including central particles of LixFeyMzPO4 and a carbonaceous film which coats the central particles, wherein a particle size distribution thereof has maximum values of a relative particle amount on both fine and coarse particle sides. A particle diameter with the maximum relative particle amount on the fine particle side is in a range A of 0.70 ?m to 2.00 ?m, and a particle diameter with the maximum relative particle amount on the coarse particle side is in a range B of 7.00 ?m to 15.00 ?m. A difference between maximum values of a relative particle amount is 2.00% to 6.00%.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: June 23, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Masataka Oyama, Koji Oono, Takao Kitagawa
  • Patent number: 10680240
    Abstract: Embodiments provide an electrode material for a lithium ion battery capable of decreasing a metal elution amount even when an electrode active material having a large specific surface area is used as the electrode material and capable of obtaining a lithium ion battery in which a decrease in a capacity caused by storage at a high temperature in a fully charged state is suppressed and a lithium ion battery. The electrode material for a lithium ion battery includes electrode active material particles and a carbonaceous film that coats surfaces of the electrode active material particles, in which a tap density is 0.95 g/cm3 or more and 1.6 g/cm3 or less, and a volume ratio of micro pores to a total volume that is evaluated from nitrogen adsorption measurement is 1.5% or more and 2.5% or less.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: June 9, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Satoru Oshitari, Masataka Oyama, Ryuuta Yamaya
  • Publication number: 20200161657
    Abstract: A lithium-ion secondary battery including a cathode, an anode, and an electrolyte, in which the lithium-ion secondary battery includes inorganic phosphate particles, and the cathode includes cathode active material particles which include central particles made of LixAyMzPO4 (0?x?1.1, 0.8?y?1.1, and 0?z?0.2; here, A represents at least one element selected from the group consisting of Fe, Mn, Co, and Ni, and M represents at least one element selected from the group consisting of Mg, Ca, Co, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, and rare earth elements) and a carbonaceous film that coats surfaces of the central particles.
    Type: Application
    Filed: January 8, 2020
    Publication date: May 21, 2020
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Masataka OYAMA, Takao KITAGAWA
  • Patent number: 10629908
    Abstract: A cathode material for a lithium-ion secondary battery which includes granulated bodies in which primary particles are aggregated, wherein an average particle diameter of the granulated bodies is 4.50 ?m or more and 6.20 ?m or less, and particle diameters of 90% or more of the granulated bodies are 1.00 ?m or more and 11.00 ?m or less, wherein particle diameters of the granulated bodies are evaluated such that 300 granulated bodies are randomly selected from a view of the granulated bodies using a scanning electron microscope, a plurality of diameters of each of the 300 granulated bodies that pass through a central point thereof are evaluated, and a maximum diameter selected from the plurality of diameters is considered as a particle diameter of each of granulated bodies.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: April 21, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Masataka Oyama, Takao Kitagawa
  • Publication number: 20200106087
    Abstract: An electrode material including a carbonaceous-coated electrode active material having primary particles of an electrode active material, secondary particles that are aggregates of the primary particles, and a carbonaceous film that coats the primary particles of the electrode active material and the secondary particles that are the aggregates of the primary particles, in which, in the electrode material, when ten random 180 nm×180 nm views are observed using an electron microscope at a magnification of 100,000 times, the number of free carbon aggregates is three or less, and the number of protrusions twice or more as thick as the carbonaceous film is three or less.
    Type: Application
    Filed: March 26, 2019
    Publication date: April 2, 2020
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kouji OONO, Satoru OSHITARI, Masataka OYAMA
  • Publication number: 20200106092
    Abstract: An electrode material for a lithium ion secondary battery of the present invention includes an electrode active material represented by LiFexMn1-w-x-yMgyAwPO4 and a carbonaceous film coating a surface of the electrode active material, a particle diameter D10 of secondary particles is 0.5 ?m or more, a particle diameter D90 of the secondary particles is 25 ?m or less, and a ratio (O/I) of an average value of thicknesses I of the carbonaceous film on the surfaces of the primary particles in a range of 0.3 ?m or less from a center of the secondary particle at 300 measurement points to an average value of thicknesses of the carbonaceous film on the surfaces of the primary particles in a range of 0.3 ?m or less from an outermost surface of the secondary particle at 300 measurement points is 0.85 or more and less than 1.00.
    Type: Application
    Filed: March 15, 2019
    Publication date: April 2, 2020
    Inventors: Satoru OSHITARI, Masataka Oyama, Kouji Oono
  • Publication number: 20200106086
    Abstract: An electrode material including a carbonaceous-coated electrode active material having primary particles of an electrode active material and secondary particles that are aggregates of the primary particles, and a carbonaceous film that coats the primary particles of the electrode active material and the secondary particles that are the aggregates of the primary particles, in which a proportion of a volume of micropores having a micropore diameter of 50 nm or less in a volume of micropores having a micropore diameter of 300 nm or less, which is obtained using a nitrogen adsorption method, is 40% or more.
    Type: Application
    Filed: February 22, 2019
    Publication date: April 2, 2020
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kouji OONO, Satoru OSHITARI, Masataka OYAMA
  • Patent number: 10573890
    Abstract: A cathode material for a lithium-ion secondary battery including: granulated bodies in which primary particles are aggregated, wherein an average particle diameter of the granulated bodies is 0.90 ?m or more and 2.00 ?m or less, particle diameters of 90% or more of the granulated bodies are 0.25 ?m or more and 3.50 ?m or less, wherein particle diameters of the granulated bodies are evaluated such that 300 granulated bodies are randomly selected from a view of the granulated bodies using a scanning electron microscope, a plurality of diameters of each of the 300 granulated bodies that pass through a central point thereof are evaluated, and a maximum diameter selected from said plurality of diameters is considered as a particle diameter of each of the granulated bodies.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: February 25, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Masataka Oyama, Ryuuta Yamaya, Takao Kitagawa
  • Patent number: 10566621
    Abstract: A lithium-ion secondary battery including a cathode, an anode, and an electrolyte, in which the lithium-ion secondary battery includes inorganic phosphate particles, and the cathode includes cathode active material particles which include central particles made of LixAyMzPO4 (0?x?1.1, 0.8?y?1.1, and 0?z?0.2; here, A represents at least one element selected from the group consisting of Fe, Mn, Co, and Ni, and M represents at least one element selected from the group consisting of Mg, Ca, Co, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, and rare earth elements) and a carbonaceous film that coats surfaces of the central particles.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: February 18, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD
    Inventors: Masataka Oyama, Takao Kitagawa
  • Patent number: 10566622
    Abstract: A cathode material for a lithium-ion secondary battery, the cathode material including: secondary particles which are granulated active material particles including central particles and a carbonaceous film that coats surfaces of the central particles, wherein a granulated body breakage degree ((a?b)/a) of the secondary particles is 0.03 or more and 0.30 or less, and the granulated body breakage degree is calculated based on a relative particle amount a, at which a maximum peak is shown in a particle size distribution of the secondary particles, and a relative particle amount b, at which a maximum peak in a particle size distribution of the secondary particles is shown after a dispersion treatment of the secondary particles is performed using a homogenizer.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: February 18, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Masataka Oyama, Takao Kitagawa
  • Publication number: 20190305304
    Abstract: Embodiments provide an electrode material for a lithium ion battery capable of decreasing a metal elution amount even when an electrode active material having a large specific surface area is used as the electrode material and capable of obtaining a lithium ion battery in which a decrease in a capacity caused by storage at a high temperature in a fully charged state is suppressed and a lithium ion battery. The electrode material for a lithium ion battery includes electrode active material particles and a carbonaceous film that coats surfaces of the electrode active material particles, in which a tap density is 0.95 g/cm3 or more and 1.6 g/cm3 or less, and a volume ratio of micro pores to a total volume that is evaluated from nitrogen adsorption measurement is 1.5% or more and 2.5% or less.
    Type: Application
    Filed: September 26, 2018
    Publication date: October 3, 2019
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Satoru OSHITARI, Masataka OYAMA, Ryuuta YAMAYA
  • Publication number: 20190305364
    Abstract: A cathode material for a lithium ion secondary battery enabling diffusion of lithium ions in a two-dimensional direction or a three-dimensional direction in crystals is provided. The cathode material is formed by coating a surface of a central particle represented by-the Formula LixFe1?y?zAyMzPO4 with a carbonaceous film, in which a content of a carbon atom is 0.3% by mass or more and 3.4% by mass or less, and, in a Moessbauer spectrum obtained by Moessbauer spectroscopy, when an area intensity of a spectrum having an isomer shift value in a range of 1.0 mm/sec or more and 1.4 mm/sec or less is represented by ?, and an area intensity of a spectrum having an isomer shift value in a range of 0.3 mm/sec or more and 0.7 mm/sec or less is represented by ?, {?/((?+?)×(1?y?z)} is 0.01 or more and 0.1 or less.
    Type: Application
    Filed: September 27, 2018
    Publication date: October 3, 2019
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Masataka OYAMA, Satoru OSHITARI, Ryuuta YAMAYA, Takao KITAGAWA
  • Patent number: 10290856
    Abstract: A cathode material including an aggregate formed by aggregating active material particles, in which the active material particle is a particle including a cathode active material as a formation material and a carbonaceous material is provided on a surface of the particle, a ratio between a weight ratio of carbon contained in the aggregate to a BET specific surface area of the cathode material is in a range of 0.08 to 0.2, a tap density is in a range of 0.9 g/cm3 to 1.5 g/cm3, and an oil absorption amount for which N-methyl-2-pyrrolidone is used is 70 cc/100 g or less.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: May 14, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Masataka Oyama, Satoru Oshitari, Ryuuta Yamaya
  • Publication number: 20190103611
    Abstract: A cathode material for a lithium-ion secondary battery including: granulated bodies in which primary particles are aggregated, wherein an average particle diameter of the granulated bodies is 0.90 ?m or more and 2.00 ?m or less, particle diameters of 90% or more of the granulated bodies are 0.25 ?m or more and 3.50 ?m or less, wherein particle diameters of the granulated bodies are evaluated such that 300 granulated bodies are randomly selected from a view of the granulated bodies using a scanning electron microscope, a plurality of diameters of each of the 300 granulated bodies that pass through a central point thereof are evaluated, and a maximum diameter selected from said plurality of diameters is considered as a particle diameter of each of the granulated bodies.
    Type: Application
    Filed: March 26, 2018
    Publication date: April 4, 2019
    Inventors: Masataka OYAMA, Ryuuta YAMAYA, Takao KITAGAWA
  • Publication number: 20190103610
    Abstract: A cathode material fora lithium-ion secondary battery which includes granulated bodies in which primary particles are aggregated, wherein an average particle diameter of the granulated bodies is 4.50 ?m or more and 6.20 ?m or less, and particle diameters of 90% or more of the granulated bodies are 1.00 ?m or more and 11.00 ?m or less, wherein particle diameters of the granulated bodies are evaluated such that 300 granulated bodies are randomly selected from a view of the granulated bodies using a scanning electron microscope, a plurality of diameters of each of the 300 granulated bodies that pass through a central point thereof are evaluated, and a maximum diameter selected from the plurality of diameters is considered as a particle diameter of each of granulated bodies.
    Type: Application
    Filed: March 26, 2018
    Publication date: April 4, 2019
    Inventors: Masataka OYAMA, Takao KITAGAWA
  • Publication number: 20190097230
    Abstract: A cathode material for a lithium-ion secondary battery, the cathode material including: secondary particles which are granulated active material particles including central particles and a carbonaceous film that coats surfaces of the central particles, wherein a granulated body breakage degree ((a?b)/a) of the secondary particles is 0.03 or more and 0.30 or less, and the granulated body breakage degree is calculated based on a relative particle amount a, at which a maximum peak is shown in a particle size distribution of the secondary particles, and a relative particle amount b, at which a maximum peak in a particle size distribution of the secondary particles is shown after a dispersion treatment of the secondary particles is performed using a homogenizer.
    Type: Application
    Filed: March 26, 2018
    Publication date: March 28, 2019
    Inventors: Masataka OYAMA, Takao KITAGAWA