Patents by Inventor Kunihiro Uramatsu

Kunihiro Uramatsu 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 COMPOSITE OXIDE PARTICLES FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERIES AND PROCESS FOR PRODUCING THE SAME, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    Publication number: 20190157667
    Abstract: The present invention relates to lithium composite oxide particles which can be produced by mixing nickel-cobalt-manganese-based compound particles, a zirconium raw material and a lithium raw material with each other and then calcining the resulting mixture, and comprise a Zr compound that is allowed to be present on a surface thereof, in which the Zr compound is represented by the chemical formula: Lix(Zr1-yAy)Oz wherein x, y and z are 2.0?x?8.0; 0?y?1.0; and 2.0?z?6.0, respectively, and a content of Zr in the lithium composite oxide particles is 0.05 to 1.0% by weight. By using the lithium composite oxide particles as a positive electrode active substance, it is possible to produce a lithium ion secondary battery that has a low electric resistance at a high temperature, and is excellent in cycle characteristic at a high temperature as well as high-temperature rate characteristic.
    Type: Application
    Filed: December 18, 2018
    Publication date: May 23, 2019
    Inventors: Minoru Yamazaki, Osamu Sasaki, Shoichi Fujino, Hideharu Mitsui, Takayuki Yamamura, Kunihiro Uramatsu, Akihisa Kajiyama, Ryuta Masaki
  • LITHIUM COMPOSITE OXIDE PARTICLES FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERIES AND PROCESS FOR PRODUCING THE SAME, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    Publication number: 20150024273
    Abstract: The present invention relates to lithium composite oxide particles which can be produced by mixing nickel-cobalt-manganese-based compound particles, a zirconium raw material and a lithium raw material with each other and then calcining the resulting mixture, and comprise a Zr compound that is allowed to be present on a surface thereof, in which the Zr compound is represented by the chemical formula: Lix(Zr1-yAy)Oz wherein x, y and z are 2.0?x?8.0; 0?y?1.0; and 2.0?z?6.0, respectively, and a content of Zr in the lithium composite oxide particles is 0.05 to 1.0% by weight. By using the lithium composite oxide particles as a positive electrode active substance, it is possible to produce a lithium ion secondary battery that has a low electric resistance at a high temperature, and is excellent in cycle characteristic at a high temperature as well as high-temperature rate characteristic.
    Type: Application
    Filed: March 14, 2013
    Publication date: January 22, 2015
    Inventors: Minoru Yamazaki, Osamu Sasaki, Shoichi Fujino, Hideharu Mitsui, Takayuki Yamamura, Kunihiro Uramatsu, Akihisa Kajiyama, Ryuta Masaki