Patents by Inventor Ryuuta YAMAYA

Ryuuta YAMAYA 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: 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
  • Patent number: 10593939
    Abstract: A cathode material for a lithium-ion secondary battery including: active material particles including central particles represented by general formula LixAyDzPO4 (here, A represents at least one element selected from the group consisting of Co, Mn, Ni, Fe, Cu, and Cr, 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, 0.9<x<1.1, 0<y?1, 0?z<1, and 0.9<y+z<1.1) and a carbonaceous film that coats surfaces of the central particles, wherein, when a mixture of the active material particles, a conductive auxiliary agent and a binder in which a mixing ratio thereof is 94:1:5 in terms of a mass ratio is dissolved in a solvent to form paste having a total solid content amount of 45% by mass, a viscosity of the past is 5,000 mPa·s or less at a shear rate of 4.0 [1/s].
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: March 17, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Ryuuta Yamaya, Susumu Murata
  • Publication number: 20200067093
    Abstract: A cathode material for a lithium ion secondary battery including agglomerated particles formed by agglomeration of a plurality of primary particles of a cathode active material which are coated with a carbonaceous film, in which an amount of carbon per a crystallite diameter of the cathode active material is 0.008% by mass/nm or more and 0.050% by mass/nm or less, and a peak intensity ratio (ID/IG) between a D band and a G band in a Raman spectrum obtained by Raman spectrometry is 0.85 or more and 1.15 or less. The cathode active material is represented by LixAyDzPO4, where A represents at least one element selected from the group consisting of Co, Mn, Ni, Fe, Cu, and Cr, 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, 0.9<x<1.1, 0<y?1, 0?z<1, and 0.9<y+z<1.1.
    Type: Application
    Filed: February 22, 2019
    Publication date: February 27, 2020
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Ryuuta YAMAYA, Tsutomu NOZOE
  • Publication number: 20200067082
    Abstract: A method of producing a positive electrode material for lithium-ion secondary batteries, which includes a pyrolyzed carbon coating, the method including a heat treatment step of thermally decomposing an organic compound using a rotary kiln to form a pyrolyzed carbon coating, wherein the organic compound is a carbon source that forms the pyrolyzed carbon coating of a positive electrode material.
    Type: Application
    Filed: August 19, 2019
    Publication date: February 27, 2020
    Inventors: Tsutomu NOZOE, Ryuuta YAMAYA
  • 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: 10547048
    Abstract: An electrode material for a lithium ion battery including an active material represented by LiMPO4 (M is at least one selected from the group consisting of Fe, Mn, Co, Ni, Zn, Al, Ga, Mg, and Ca), in which an oil absorption amount for which diethyl carbonate is used (DEC oil absorption amount) is 50 cc/100 g or more and 80 cc/100 g or less, and a ratio (DEC/NMP) of the DEC oil absorption amount to an oil absorption amount for which N-methyl-2-pyrrolidinone is used (NMP oil absorption amount) is 1.3 or more and 1.8 or less.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: January 28, 2020
    Assignee: SUMITOMO OSAKA CLEMENT CO., LTD.
    Inventors: Satoru Oshitari, Ryuuta Yamaya
  • Publication number: 20190305363
    Abstract: An electrode material for a lithium ion secondary battery of the present invention is an electrode material for a lithium ion secondary battery, which comprises a mixture of an oxide-based electrode active material and a granulated body generated from primary particles, wherein the primary particles include an olivine-type electrode active material represented by General Formula LixAyDzPO4 and a carbonaceous film that coats a surface of the olivine-type electrode active material, and wherein an average particle diameter of the primary particles is 30 nm or more and 500 nm or less, an average particle diameter of the granulated body is 0.5 ?m or more and 60 ?m or less, a tensile strength ? of the granulated body is 4 MPa or more, and a brittleness of the granulated body that is defined as a ratio (?/b) of the tensile strength ? of the granulated body to a compression constant b of the granulated body is 0.2 or more.
    Type: Application
    Filed: September 24, 2018
    Publication date: October 3, 2019
    Inventors: Tsutomu NOZOE, 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
  • Publication number: 20190305362
    Abstract: An electrode material for a lithium ion secondary battery of the present invention is an electrode material for a lithium ion secondary battery containing a granulated body which is generated from primary particles, wherein the primary particles include an olivine-type electrode active material and a carbonaceous film that coats a surface of the olivine-type electrode active material, in which an average particle diameter of the primary particles is 30 nm or more and 500 nm or less, an average particle diameter of the granulated body is 0.5 ?m or more and 60 ?m or less, a tensile strength ? of the granulated body is 4 MPa or more, and a brittleness of the granulated body that is defined as a ratio (?/b) of the tensile strength ? of the granulated body to a compression constant b of the granulated body is 0.2 or more.
    Type: Application
    Filed: September 24, 2018
    Publication date: October 3, 2019
    Inventors: Tsutomu NOZOE, Ryuuta YAMAYA
  • 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
  • Patent number: 10431817
    Abstract: An electrode material includes an inorganic particle and a carbonaceous film coating a surface of the inorganic particle, in which an amount of carbon is 0.8 to 2.5% by mass, and volume of micropores in a micropore diameter range of 2 to 200 nm is 3×10?2 to 3×10?1 cm3/g. A method for manufacturing an electrode material includes a step of immersing the inorganic particle in an aqueous solution, a step of producing a slurry including the inorganic particle immersed in an aqueous solution, a carbonaceous film precursor, and water, a step of producing a dried substance of the slurry, and a step of calcinating the dried substance in a non-oxidative atmosphere, in which an amount of the carbonaceous film precursor blended into the inorganic particle is 1.0 to 5.0 parts by mass. A lithium-ion secondary battery includes a cathode that is the electrode; an anode; and a non-aqueous electrolyte.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: October 1, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Hirofumi Yasumiishi, Ryuuta Yamaya
  • Patent number: 10403892
    Abstract: A cathode material for a lithium-ion secondary battery which is made of agglomerated secondary particles formed by agglomeration of a plurality of primary particles of electrode active material particles made of a transition metal lithium phosphate compound having an olivine structure that is coated with a carbonaceous material, in which an arithmetic average roughness Ra of agglomerated secondary particle surfaces observed using a three-dimensional scanning electron microscope is 15 nm or more and 25 nm or less.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: September 3, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Hirofumi Yasumiishi, Ryuuta Yamaya
  • Publication number: 20190267623
    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. The cathode material for the lithium ion secondary battery is formed by coating a surface of a central particle represented by General 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: August 29, 2019
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Tsutomu NOZOE, Ryuuta YAMAYA
  • Patent number: 10326163
    Abstract: A cathode material for a lithium-ion secondary battery which is made of agglomerated secondary particles formed by agglomeration of a plurality of primary particles of electrode active material particles made of a transition metal lithium phosphate compound having an olivine structure that is coated with a carbonaceous material, in which an arithmetic average roughness Ra of agglomerated secondary particle surfaces observed using a three-dimensional scanning electron microscope is 3 nm or more and less than 15 nm.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: June 18, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Hirofumi Yasumiishi, Ryuuta Yamaya
  • 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: 20190103601
    Abstract: An electrode material for a lithium ion battery including an active material represented by LiMPO4 (M is at least one selected from the group consisting of Fe, Mn, Co, Ni, Zn, Al, Ga, Mg, and Ca), in which an oil absorption amount for which diethyl carbonate is used (DEC oil absorption amount) is 50 cc/100 g or more and 80 cc/100 g or less, and a ratio (DEC/NMP) of the DEC oil absorption amount to an oil absorption amount for which N-methyl-2-pyrrolidinone is used (NMP oil absorption amount) is 1.3 or more and 1.8 or less.
    Type: Application
    Filed: March 22, 2018
    Publication date: April 4, 2019
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: 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: 20190097214
    Abstract: A cathode material for a lithium-ion secondary battery including: active material particles including central particles represented by general formula LixAyDzPO4 (here, A represents at least one element selected from the group consisting of Co, Mn, Ni, Fe, Cu, and Cr, 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, 0.9<x<1.1, 0<y?1, 0?z<1, and 0.9<y+z<1.1) and a carbonaceous film that coats surfaces of the central particles, wherein, when a mixture of the active material particles, a conductive auxiliary agent and a binder in which a mixing ratio thereof is 94:1:5 in terms of a mass ratio is dissolved in a solvent to form paste having a total solid content amount of 45% by mass, a viscosity of the past is 5,000 mPa·s or less at a shear rate of 4.0 [l/s].
    Type: Application
    Filed: March 26, 2018
    Publication date: March 28, 2019
    Inventors: Ryuuta YAMAYA, Susumu MURATA
  • Patent number: 10193155
    Abstract: A cathode material which does not easily deteriorate when used in batteries, a method for producing cathode materials, a cathode, and a lithium ion battery are provided. A cathode material including a cathode active material, in which the cathode active material is expressed by Li1+xAyDzPO4 (here, A represents one or more metal elements selected from the group consisting of Co, Mn, Ni, Fe, Cu, and Cr, D represents one or more metal elements selected from the group consisting of Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, Y, and rare earth elements, 0<x<1, 0<y<1, 0?z<1.5, and 0.9<y+z?1), and, in thermogravimetric analysis in an inert gas atmosphere, when a temperature is increased in a temperature range from 100° C. to 300° C. at a temperature-increase rate of 10° C./minute, a weight loss ratio in the temperature range is 0.3% by weight or less.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: January 29, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Masataka Oyama, Satoru Oshitari, Ryuuta Yamaya