Patents by Inventor Izumi Uchiyama

Izumi Uchiyama 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: 8178239
    Abstract: A cathode material for a secondary battery containing a cathode active material represented by the general formula LinFePO4 (wherein n represents a number from 0 to 1) as a primary component and molybdenum (Mo), wherein the cathode active material LinFePO4 is composited with the Mo. In a preferred embodiment, the cathode material has conductive carbon deposited on the surface thereof.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: May 15, 2012
    Assignees: Mitsui Engineering & Shipbuilding Co., Ltd., Research Institute of Innovative Technology for the Earth
    Inventors: Naoki Hatta, Toshikazu Inaba, Izumi Uchiyama
  • Patent number: 8119285
    Abstract: A positive electrode material is disclosed which contains an iron lithium phosphate as a positive electrode active material and has a large charge/discharge capacity, high-rate adaptability, and good charge/discharge cycle characteristics at the same time. Also disclosed are a simple method for producing such a positive electrode material and a high-performance secondary battery employing such a positive electrode material. Specifically, disclosed is a positive electrode material for secondary battery characterized by mainly containing a positive electrode active material represented by the general formula: LinFePO4 (wherein n is a number of 0-1) and further containing at least one different metal element selected from the group consisting of vanadium (V), chromium (Cr), copper (Cu), zinc (Zn), indium (In) and tin (Sn). This positive electrode material can be produced using a halide of such a metal element as the raw material.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: February 21, 2012
    Assignee: Mitsui Engineering & Shipbuilding Co., Ltd.
    Inventors: Naoki Hatta, Toshikazu Inaba, Izumi Uchiyama
  • Patent number: 7491468
    Abstract: A method for producing a cathode material for a secondary battery, characterized in that it comprises admixing a compound liberating a phosphate ion in a solution (phosphoric acid H3PO4, phosphorus pentoxide PO5, ammonium dihydrogenphosphate NH4H2PO4 and the like), water and metallic iron, adding lithium carbonate, lithium hydroxide or a hydrate thereof to the resultant mixture, and firing the resultant reaction product, to thereby synthesize LiFePO4.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: February 17, 2009
    Assignees: Japan as represented by the President of the University of Kyusyu, Mitsui Engineering & Shipbuilding Co., Ltd. et al.
    Inventors: Shigeto Okada, Jun-ichi Yamaki, Naoki Hatta, Izumi Uchiyama, Toshikazu Inaba
  • Publication number: 20080138709
    Abstract: A cathode material for a secondary battery containing a cathode active material represented by the general formula LinFePO4 (wherein n represents a number from 0 to 1) as a primary component and molybdenum (Mo), wherein the cathode active material LinFePO4 is composited with the Mo. In a preferred embodiment, the cathode material has conductive carbon deposited on the surface thereof.
    Type: Application
    Filed: January 30, 2004
    Publication date: June 12, 2008
    Applicant: Mitsui Engineering & Shipbuilding Co., Ltd. Et al.
    Inventors: Naoki Hatta, Toshikazu Inaba, Izumi Uchiyama
  • Publication number: 20080131777
    Abstract: A positive electrode material is disclosed which contains an iron lithium phosphate as a positive electrode active material and has a large charge/discharge capacity, high-rate adaptability, and good charge/discharge cycle characteristics at the same time. Also disclosed are a simple method for producing such a positive electrode material and a high-performance secondary battery employing such a positive electrode material. Specifically, disclosed is a positive electrode material for secondary battery characterized by mainly containing a positive electrode active material represented by the general formula: LinFePO4 (wherein n is a number of 0-1) and further containing at least one different metal element selected from the group consisting of vanadium (V), chromium (Cr), copper (Cu), zinc (Zn), indium (In) and tin (Sn). This positive electrode material can be produced using a halide of such a metal element as the raw material.
    Type: Application
    Filed: October 26, 2004
    Publication date: June 5, 2008
    Inventors: Naoki Hatta, Toshikazu Inaba, Izumi Uchiyama
  • Publication number: 20060147365
    Abstract: A method for producing a cathode material for a secondary battery, characterized in that it comprises admixing a compound liberating a phosphate ion in a solution (phosphoric acid H3PO4, phosphorus pentoxide PO5, ammonium dihydrogenphosphate NH4H2PO4 and the like), water and metallic iron, adding lithium carbonate, lithium hydroxide or a hydrate thereof to the resultant mixture, and firing the resultant reaction product , to thereby synthesize LiFePO4.
    Type: Application
    Filed: October 17, 2003
    Publication date: July 6, 2006
    Inventors: Shigeto Okada, Jun-Ichi Yamaki, Naoki Hatta, Izumi Uchiyama, Toshikazu Inaba