Patents by Inventor Kei KITAURA

Kei KITAURA 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).

  • Negative electrode active material for electrical device
    Patent number: 10818920
    Abstract: A negative electrode active material having high cycle durability contains an alloy represented by the following chemical formula (1): SixSnyMzAa??(1) wherein M is Zn, A is unavoidable impurities, x, y, z, and a represent % by mass values, and in that case, 0<x<100, 0<y<100, 0<z<100, 0?a<0.5, and x+y+z+a=100, in which the half width of the diffraction peak of the (111) surface of Si in the range of 2?=24 to 33° by X ray diffraction measurement of the alloy using CuK? ray is 0.7° or more, and the x is more than 23 and less than 64, the y is 4 or more and less than 34, and the z is more than 0 and less than 65.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: October 27, 2020
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Fumihiro Miki, Manabu Watanabe, Nobutaka Chiba, Kei Kitaura, Tohru Wada
  • Negative Electrode Active Material for Electrical Device
    Publication number: 20190214643
    Abstract: A negative electrode active material having high cycle durability contains an alloy represented by the following chemical formula (1): SixSnyMzAa??(1) wherein M is Zn, A is unavoidable impurities, x, y, z, and a represent % by mass values, and in that case, 0<x<100, 0<y<100, 0<z<100, 0?a<0.5, and x+y+z+a=100, in which the half width of the diffraction peak of the (111) surface of Si in the range of 2?=24 to 33° by X ray diffraction measurement of the alloy using CuK? ray is 0.7° or more, and the x is more than 23 and less than 64, the y is 4 or more and less than 34, and the z is more than 0 and less than 65.
    Type: Application
    Filed: March 12, 2019
    Publication date: July 11, 2019
    Inventors: Fumihiro Miki, Manabu Watanabe, Nobutaka Chiba, Kei Kitaura, Tohru Wada
  • Negative electrode active material for electric device and electric device using same
    Patent number: 10290867
    Abstract: A negative electrode active material having high cycle durability contains an alloy represented by the following chemical formula (1): SixSnyMzAa??(1) (in the chemical formula (1), M is at least one metal selected from the group consisting of Ti, Zn, C, and combinations thereof, A is unavoidable impurities, x, y, z, and a represent % by mass values, and in that case, 0<x<100, 0<y<100, 0<z<100, 0?a<0.5, and x+y+z+a=100), in which the half width of the diffraction peak of the (111) surface of Si in the range of 2?=24 to 33° by X ray diffraction measurement of the alloy using the CuK? ray is 0.7° or more.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: May 14, 2019
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Fumihiro Miki, Manabu Watanabe, Nobutaka Chiba, Kei Kitaura, Tohru Wada
  • NEGATIVE ELECTRODE ACTIVE MATERIAL FOR ELECTRIC DEVICE AND ELECTRIC DEVICE USING SAME
    Publication number: 20160141613
    Abstract: A negative electrode active material having high cycle durability contains an alloy represented by the following chemical formula (1): SixSnyMzAa??(1) (in the chemical formula (1), M is at least one metal selected from the group consisting of Ti, Zn, C, and combinations thereof, A is unavoidable impurities, x, y, z, and a represent % by mass values, and in that case, 0<x<100, 0<y<100, 0<z<100, 0?a<0.5, and x+y+z+a=100), in which the half width of the diffraction peak of the (111) surface of Si in the range of 2?=24 to 33° by X ray diffraction measurement of the alloy using the CuK? ray is 0.7° or more.
    Type: Application
    Filed: May 19, 2014
    Publication date: May 19, 2016
    Applicant: Nissan Motor Co., Ltd.
    Inventors: Fumihiro MIKI, Manabu WATANABE, Nobutaka CHIBA, Kei KITAURA, Tohru WADA