Patents by Inventor Kentaro KURATANI

Kentaro KURATANI 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).

  • Lithium-iron-manganese-based composite oxide and lithium-ion secondary battery using same
    Patent number: 10847788
    Abstract: There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is suppressed. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula is coated with an oxide of at least one metal selected from the group consisting of La, Pr, Nd, Sm and Eu: LixM1(y-p)MnpM2(z-q)FeqO(2-?) wherein 1.05?x?1.32, 0.33?y?0.63, 0.06?z?0.50, 0<p?0.63, 0.06?q?0.50, 0???0.80, y?p, and z?q; M1 is at least one element selected from Ti and Zr; and M2 is at least one element selected from the group consisting of Co, Ni and Mn.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: November 24, 2020
    Assignees: NEC Corporation, Tanaka Chemical Corporation
    Inventors: Ryota Yuge, Noriyuki Tamura, Sadanori Hattori, Mitsuharu Tabuchi, Kentaro Kuratani, Kyousuke Doumae, Hideka Shibuya
  • Lithium-iron-manganese-based composite oxide and lithium-ion secondary battery using same
    Patent number: 10164250
    Abstract: There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is reduced. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula (1) is coated with an inorganic material: LixM1(y-p)MnpM2(z-p)FeqO(2-?) (1) (wherein 1.05?x?1.32, 0.33?y?0.63, 0.06?z?0.50, 0<p?0.63, 0.06?q?0.50, 0???0.80, y?p, and z?q; M1 is at least one element selected from Ti and Zr; and M2 is at least one element selected from the group consisting of Co, Ni and Mn).
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: December 25, 2018
    Assignees: NEC Corporation, Tanaka Chemical Corporation
    Inventors: Kentaro Nakahara, Ryota Yuge, Noriyuki Tamura, Sadanori Hattori, Kentaro Kuratani, Kyousuke Doumae, Hideka Shibuya, Mitsuharu Tabuchi
  • LITHIUM-IRON-MANGANESE-BASED COMPOSITE OXIDE AND LITHIUM-ION SECONDARY BATTERY USING SAME
    Publication number: 20180069236
    Abstract: There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is suppressed. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula is coated with an oxide of at least one metal selected from the group consisting of La, Pr, Nd, Sm and Eu: LixM1(y-p)MnpM2(z-q)FeqO(2-?) wherein 1.05?x?1.32, 0.33?y?0.63, 0.06?z?0.50, 0<p?0.63, 0.06?q?0.50, 0???0.80, y?p, and z?q; M1 is at least one element selected from Ti and Zr; and M2 is at least one element selected from the group consisting of Co, Ni and Mn.
    Type: Application
    Filed: February 9, 2016
    Publication date: March 8, 2018
    Applicants: NEC Corporation, Tanaka Chemical Corporation
    Inventors: Ryota YUGE, Noriyuki TAMURA, Sadanori HATTORI, Mitsuharu TABUCHI, Kentaro KURATANI, Kyousuke DOUMAE, Hideka SHIBUYA
  • LITHIUM-IRON-MANGANESE-BASED COMPOSITE OXIDE AND LITHIUM-ION SECONDARY BATTERY USING SAME
    Publication number: 20160218360
    Abstract: There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is reduced. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula (1) is coated with an inorganic material: LixM1(y-p)MnpM2(z-p)FeqO(2-?) (1) (wherein 1.05?x?1.32, 0.33?y?0.63, 0.06?z?0.50, 0<p?0.63, 0.06?q?0.50, 0???0.80, y?p, and z?q; M1 is at least one element selected from Ti and Zr; and M2 is at least one element selected from the group consisting of Co, Ni and Mn).
    Type: Application
    Filed: August 19, 2014
    Publication date: July 28, 2016
    Applicants: NEC Corporation, Tanaka Chemical Corporation
    Inventors: Kentaro NAKAHARA, Ryota YUGE, Noriyuki TAMURA, Sadanori HATTORI, Kentaro KURATANI, Kyousuke DOUMAE, Hideka SHIBUYA, Mitsuharu TABUCHI