Patents by Inventor Shiroh Oie

Shiroh Oie 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 material for lithium ion secondary batteries, and method for producing same
    Patent number: 9312532
    Abstract: A negative electrode material for lithium ion secondary batteries comprises amorphous coated particles that are composed of a plurality of consolidated particles having no specific shape, said consolidated particles being obtained by consolidating a plurality of primary spheroidized graphite particles, and 0.5-20% by mass of an amorphous carbon layer that covers the surfaces of the consolidated particles and binds the consolidated particles with each other; and 0.5-20% by mass of a highly crystalline carbon layer that is formed so as to cover the outer surfaces of the amorphous coated particles and has an interplanar distance ascribed to CVD processing of 0.335 nm or more but less than 0.3369 nm. The negative electrode material for lithium ion secondary batteries is also characterized by having a porosity of 5% by volume or less, and a method for producing the negative electrode material for lithium ion secondary batteries.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: April 12, 2016
    Assignee: Nippon Coke & Engineering Co., Ltd.
    Inventors: Tatsuo Umeno, Tadanori Tsunawaki, Koutarou Mizuma, Shinya Okabe, Shiroh Oie
  • NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, AND METHOD FOR PRODUCING SAME
    Publication number: 20130309578
    Abstract: A negative electrode material for lithium ion secondary batteries comprises amorphous coated particles that are composed of a plurality of consolidated particles having no specific shape, said consolidated particles being obtained by consolidating a plurality of primary spheroidized graphite particles, and 0.5-20% by mass of an amorphous carbon layer that covers the surfaces of the consolidated particles and binds the consolidated particles with each other; and 0.5-20% by mass of a highly crystalline carbon layer that is formed so as to cover the outer surfaces of the amorphous coated particles and has an interplanar distance ascribed to CVD processing of 0.335 nm or more but less than 0.3369 nm. The negative electrode material for lithium ion secondary batteries is also characterized by having a porosity of 5% by volume or less, and a method for producing the negative electrode material for lithium ion secondary batteries.
    Type: Application
    Filed: December 6, 2011
    Publication date: November 21, 2013
    Inventors: Tatsuo Umeno, Tadanori Tsunawaki, Koutarou Mizuma, Shinya Okabe, Shiroh Oie