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: 9722250
    Abstract: An electrode material including electrode active material particles and a carbonaceous film layer coating surfaces of the electrode active material particles and including a metal oxide, a content ratio of the metal oxide in the carbonaceous film layer being 5% by mass to 70% by mass. A method for manufacturing an electrode material, in which electrode active material particles, a metal salt or metal alkoxide containing any one or more metal atoms selected from a group consisting of Al, Zr, Si, and Ti, and an organic compound which is a precursor of carbon are mixed so that a total blending amount of the metal salt or metal alkoxide satisfies that an amount of a metal oxide in the carbonaceous film layer when the metal salt or metal alkoxide is all changed to the metal oxide is 5% by mass to 70% by mass, and are heated in a non-oxidative atmosphere.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: August 1, 2017
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kouji Oono, Kenta Ooishi, Takao Kitagawa, Masataka Oyama, Satoru Oshitari, Ryuuta Yamaya
  • Patent number: 9692054
    Abstract: There are provided an electrode material for a lithium ion secondary battery having a high discharge capacity and a high mass energy density at a low temperature or at a high-speed charge and discharge, an electrode for a lithium ion secondary battery, and a lithium ion secondary battery. An electrode material for a lithium ion secondary battery of the present invention includes an electrode active material made of LiFexMn1?x?yMyPO4 (0.220?x?0.350, 0.0050?y?0.018) in which the M is either or both of Co and Zn, the electrode material has an orthorhombic crystal structure, a space group is Pnma, values of crystal lattice constants a, b, and c satisfy 10.28 ??a?10.42 ?, 6.000 ??b?6.069 ?, and 4.710 ??c?4.728 ?, and lattice volume V satisfies 289.00 ?3?V?298.23 ?3.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: June 27, 2017
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Satoru Oshitari, Masataka Oyama, Ryuuta Yamaya
  • Patent number: 9692046
    Abstract: An electrode material for a lithium-ion secondary battery of the present invention includes particles which are made of LiFexMn1-w-x-y-zMgyCazAwPO4 (here, A represents at least one element selected from the group consisting of Co, Ni, Zn, Al, and Ga, 0.05?x?0.35, 0.01?y?0.08, 0.0001?z?0.001, and 0?w?0.02) and have an orthorhombic crystal structure, a 0.1 CA capacity during constant-current charge in a range of 4.0 V to 4.3 V is 100 mAh/g or more, and a ratio (1 CA/0.1 CA) of a 1 CA capacity to the 0.1 CA capacity during the constant-current charge in the range of 4.0 V to 4.3 V is 0.60 or more.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: June 27, 2017
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Satoru Oshitari, Masataka Oyama, Naoyuki Kurosawa, Ryuuta Yamaya
  • Publication number: 20170092941
    Abstract: [Problems] To provide an electrode material for a lithium-ion rechargeable battery capable of improving the battery characteristics, durability, and stability of a lithium-ion rechargeable battery, an electrode for a lithium-ion rechargeable battery, and a lithium-ion rechargeable battery. [Means] An electrode material for a lithium-ion rechargeable battery of the present invention is an electrode material for a lithium-ion rechargeable battery formed by coating the surface of an electrode active material represented by General Formula LixAyDzPO4 (here, A represents at least one element selected from Co, Mn, Ni, Fe, Cu, and Cr, D represents at least one element selected from Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, and Y, 1?x?1.1, 0<y?1, 0?z<1, 0.9<y+z?1) with a carbonaceous film, in which a saturated adsorbed moisture amount in a carbonaceous film single body, which is detected in a temperature range of room temperature or more and 250° C.
    Type: Application
    Filed: March 21, 2016
    Publication date: March 30, 2017
    Inventors: RYUUTA YAMAYA, SATORU OSHITARI, MASATAKA OYAMA
  • Publication number: 20170092953
    Abstract: [Problems] To provide an electrode material for a lithium-ion rechargeable battery having a high mass energy density at a low temperature or in a high-speed charge and discharge. [Means for Solving the Problems] An electrode material for a lithium-ion rechargeable battery includes particles which are made of LiFexMn1-w-x-y-zMgyCazAwPO4 (here, A represents at least one element selected from Co, Ni, Zn, Al, and Ga, 0?w?0.05, 0.05?x?0.35, 0.01?y?0.10, and 0.0001?z?0.002), have an orthorhombic crystal structure, and have a space group of Pmna, in which a change ratio (V1?V2)/V1 between a lattice volume V1 of LiFexMn1-w-x-y-zMgyCazAwPO4 and a lattice volume V2 of FexMn1-w-x-y-zMgyCazAwPO4 obtained by chemically deintercalating Li from LiFexMn1-w-x-y-zMgyCazAwPO4 is in a range of 0.06 to 0.09.
    Type: Application
    Filed: March 21, 2016
    Publication date: March 30, 2017
    Inventors: SATORU OSHITARI, MASATAKA OYAMA, RYUUTA YAMAYA
  • Publication number: 20170092937
    Abstract: Provided are an electrode material for a lithium-ion rechargeable battery including core particles of an active material and a carbonaceous film, in which a powder resistance is 150 ?·cm or less, and a lithium-ion rechargeable battery produced using the electrode material and a lithium metal exhibits a difference between a sum of a charge capacity with an upper limit voltage of 4.2 V and the lithium-ion rechargeable battery charged at a constant current and a charge capacity with the lithium-ion rechargeable battery charged at a constant voltage for seven days at 4.2 V after the constant current charging and a discharge capacity with the lithium-ion rechargeable battery discharged at a constant current to 2 V after the constant voltage charging reaches 25 mAh/g or less, a method for manufacturing the electrode material, an electrode including the electrode material, and a lithium-ion rechargeable battery including the electrode as a cathode.
    Type: Application
    Filed: January 14, 2016
    Publication date: March 30, 2017
    Inventors: Masataka OYAMA, Kouji OONO, Takao KITAGAWA
  • Publication number: 20170092933
    Abstract: An electrode material for a lithium-ion rechargeable battery of the present invention is an electrode material for a lithium-ion rechargeable battery formed by coating a surface of an electrode active material represented by General Formula LiFexMn1-x-yMyPO4 (here, M represents at least one element selected from Mg, Ca, Co, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, and rare earth elements, 0.05?x?1.0, 0?y?0.14) with a carbonaceous film, in which an angle of repose is in a range of 35° or more and 50° or less.
    Type: Application
    Filed: February 26, 2016
    Publication date: March 30, 2017
    Inventors: Satoru OSHITARI, Masataka OYAMA, Ryuuta YAMAYA
  • Publication number: 20160322630
    Abstract: A positive electrode material for lithium ion secondary batteries includes central particles composed of LiFexMn1-x-yMyPO4 (0.05?x?1.0, 0?y?0.14, wherein M represents at least one element selected from Mg, Ca, Co, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, and rare earth elements), and a carbonaceous film that covers surfaces of the central particles, in which a specific magnetization is 0.70 emu/g or less, and an amount of water detected by a Karl Fischer titration method (coulometric titration method) in a temperature range of 100° C. or higher and 250° C. or lower is 8,000 ppm or less.
    Type: Application
    Filed: November 19, 2015
    Publication date: November 3, 2016
    Inventors: Masataka OYAMA, Akinori YAMAZAKI, Satoru OSHITARI, Ryuuta YAMAYA, Takao KITAGAWA
  • Publication number: 20160190583
    Abstract: There are provided an electrode material for a lithium ion secondary battery having a high discharge capacity and a high mass energy density at a low temperature or at a high-speed charge and discharge, an electrode for a lithium ion secondary battery, and a lithium ion secondary battery. An electrode material for a lithium ion secondary battery of the present invention includes an electrode active material made of LiFexMn1-x-yMyPO4 (0.220?x?0.350, 0.0050?y?0.018) in which the M is either or both of Co and Zn, the electrode material has an orthorhombic crystal structure, a space group is Pnma, values of crystal lattice constants a, b, and c satisfy 10.28 ??a?10.42 ?, 6.000 ??b?6.069 ?, and 4.710 ??c?4.728 ?, and lattice volume V satisfies 289.00 ?3?V?298.23 ?3.
    Type: Application
    Filed: August 13, 2015
    Publication date: June 30, 2016
    Inventors: Satoru OSHITARI, Masataka OYAMA, Ryuuta YAMAYA
  • Publication number: 20160190589
    Abstract: An electrode material including electrode active material particles and a carbonaceous film layer coating surfaces of the electrode active material particles and including a metal oxide, a content ratio of the metal oxide in the carbonaceous film layer being 5% by mass to 70% by mass. A method for manufacturing an electrode material, in which electrode active material particles, a metal salt or metal alkoxide containing any one or more metal atoms selected from a group consisting of Al, Zr, Si, and Ti, and an organic compound which is a precursor of carbon are mixed so that a total blending amount of the metal salt or metal alkoxide satisfies that an amount of a metal oxide in the carbonaceous film layer when the metal salt or metal alkoxide is all changed to the metal oxide is 5% by mass to 70% by mass, and are heated in a non-oxidative atmosphere.
    Type: Application
    Filed: April 27, 2015
    Publication date: June 30, 2016
    Inventors: Kouji OONO, Kenta OOISHI, Takao KITAGAWA, Masataka OYAMA, Satoru OSHITARI, Ryuuta YAMAYA
  • Publication number: 20160190635
    Abstract: An electrode material for a lithium ion secondary battery of the present invention includes an electrode active material made of LiFexMn1-x-yMyPO4 (0.05?x?0.35, 0.005?y?0.14) in which the M is at least one selected from Co and Zn which are elements that are electrochemically inactive in a voltage range of 1.0 V to 4.3 V and have a smaller ionic radius than Mn, a crystal structure is orthorhombic, a space group is Pmna, values of crystal lattice constants a, b, and c satisfy 10.28 ??a?10.42 ?, 6.000 ??b?6.069 ?, and 4.710 ??c?4.728 ?, and lattice volume V satisfies 289.00 ?3?V?298.23 ?3.
    Type: Application
    Filed: March 27, 2015
    Publication date: June 30, 2016
    Inventors: Satoru OSHITARI, Masataka OYAMA, Ryuuta YAMAYA
  • Publication number: 20160118661
    Abstract: A cathode material including active material particles formed of a cathode active material, in which the cathode active material is LixAyDzPO4 (here, A represents one or more metal elements selected from a group consisting of Fe, Co, Mn, Ni, Cu and Cr, D represents one or more metal elements selected from a group consisting of Mg, Ca, Sr, Ba, Ti, Zn, Ge, Sc, Y, and rare earth elements, 0<x?2, 0<y?1 and 0?z<1.5), an average valence of the metal element represented by A and the metal element represented by D are in a range of 2 to 2.02, and a particle pH of the active material particles is in a range of 6.5 to 8.5.
    Type: Application
    Filed: March 25, 2015
    Publication date: April 28, 2016
    Inventors: Satoru OSHITARI, Masataka OYAMA, Ryuuta YAMAYA
  • Publication number: 20160111712
    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: Application
    Filed: March 23, 2015
    Publication date: April 21, 2016
    Inventors: Masataka OYAMA, Satoru OSHITARI, Ryuuta YAMAYA
  • Publication number: 20160093888
    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: Application
    Filed: March 10, 2015
    Publication date: March 31, 2016
    Inventors: Masataka OYAMA, Satoru OSHITARI, Ryuuta YAMAYA
  • Publication number: 20140322602
    Abstract: An electrode material includes surface-coated LixAyDzPO4 particles that contain Fe on surfaces of LixAyDzPO4 (wherein A represents one or two or more elements selected from the group consisting of Co, Mn, Ni, Cu, and Cr; D represents one or two or more 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?2; 0<y?1; and 0?z?1.5) particles and include a carbon coating film with which the surfaces of the LixAyDzPO4 particles containing Fe are coated, in which the surface-coated LixAyDzPO4 particles have a Li elution amount of 200 ppm to 700 ppm and a P elution amount of 500 ppm to 2000 ppm when being dipped in a sulfuric acid solution (pH=4) for 24 hours.
    Type: Application
    Filed: April 24, 2014
    Publication date: October 30, 2014
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Akinori YAMAZAKI, Ryuuta YAMAYA, Satoru OSHITARI, Hirofumi YASUMIISHI, Masataka OYAMA