Patents by Inventor Fukui Atsushi

Fukui Atsushi 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: 10205165
    Abstract: The invention provides a nonaqueous electrolyte secondary battery having a large battery capacity and excellent charge/discharge cycle characteristics. The nonaqueous electrolyte secondary battery includes a negative electrode including a particulate negative electrode active material (33), a positive electrode and a nonaqueous electrolyte. The particulate negative electrode active material (33) includes a plurality of two-phase regions (34) in the particle wherein the two-phase regions include a first phase (A) containing silicon and a second phase (B) containing silicon oxide disposed on the periphery of the first phase, the negative electrode active material being such that the ratio of the intensity at 480 cm?1 wavelength to the intensity at 510 cm?1 wavelength in a Raman spectrum obtained by Raman spectroscopy is not more than 0.1 and the ratio of the intensity at 2?=21.6 to the intensity at 2?=28.4 in an X-ray diffraction pattern obtained by X-ray diffractometry is not more than 0.1.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: February 12, 2019
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Kouhei Tuduki, Fukui Atsushi, Taizou Sunano
  • Publication number: 20150380735
    Abstract: The invention provides a nonaqueous electrolyte secondary battery having a large battery capacity and excellent charge/discharge cycle characteristics. The nonaqueous electrolyte secondary battery includes a negative electrode including a particulate negative electrode active material (33), a positive electrode and a nonaqueous electrolyte. The particulate negative electrode active material (33) includes a plurality of two-phase regions (34) in the particle wherein the two-phase regions include a first phase (A) containing silicon and a second phase (B) containing silicon oxide disposed on the periphery of the first phase, the negative electrode active material being such that the ratio of the intensity at 480 cm?1 wavelength to the intensity at 510 cm?1 wavelength in a Raman spectrum obtained by Raman spectroscopy is not more than 0.1 and the ratio of the intensity at 2?=21.6 to the intensity at 2?=28.4 in an X-ray diffraction pattern obtained by X-ray diffractometry is not more than 0.1.
    Type: Application
    Filed: March 24, 2014
    Publication date: December 31, 2015
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Kouhei Tuduki, Fukui Atsushi, Taizou Sunano