Patents by Inventor Kouhei Tuduki

Kouhei Tuduki 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: 9153841
    Abstract: Provided is a nonaqueous electrolyte secondary battery which, even in the case of using a low-viscosity solvent having a narrow potential window, can increase the electrochemical stability of the nonaqueous electrolyte solution and suppress side reactions of the nonaqueous electrolyte solution during charge and discharge to reduce the degradation of the battery characteristics and has an excellent storage characteristic in high-temperature environments and a nonaqueous electrolyte solution for the nonaqueous electrolyte secondary battery.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: October 6, 2015
    Assignees: SANYO Electric Co., Ltd., MITSUBISHI CHEMICAL CORPORATION
    Inventors: Hidekazu Yamamoto, Kouhei Tuduki, Taizou Sunano, Maruo Kamino, Youichi Ohashi, Minoru Kotato
  • Patent number: 8927158
    Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode having a positive-electrode active material, a negative electrode having a negative-electrode active material, and a nonaqueous electrolytic solution having a nonaqueous solvent dissolving a solute. The negative-electrode active material includes powdered silicon and/or a silicon alloy, the nonaqueous electrolytic solution includes additives composed of at least one fluorinated lithium phosphate selected from the group consisting of lithium monofluorophosphate, lithium difluorophosphate, and lithium trifluorophosphate and a diisocyanate compound, and the nonaqueous solvent includes a chain carbonate compound.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: January 6, 2015
    Assignees: SANYO Electric Co., Ltd., Mitsubishi Chemical Corporation
    Inventors: Hidekazu Yamamoto, Kouhei Tuduki, Taizou Sunano, Maruo Kamino, Youichi Ohashi, Minoru Kotato
  • Publication number: 20130022879
    Abstract: Provided is a nonaqueous electrolyte secondary battery which, even in the case of using a low-viscosity solvent having a narrow potential window, can increase the electrochemical stability of the nonaqueous electrolyte solution and suppress side reactions of the nonaqueous electrolyte solution during charge and discharge to reduce the degradation of the battery characteristics and has an excellent storage characteristic in high-temperature environments and a nonaqueous electrolyte solution for the nonaqueous electrolyte secondary battery.
    Type: Application
    Filed: April 28, 2011
    Publication date: January 24, 2013
    Applicants: MITSUBISHI CHEMICAL CORPORATION, SANYO Electric Co., Ltd.
    Inventors: Hidekazu Yamamoto, Kouhei Tuduki, Taizou Sunano, Maruo Kamino, Youichi Ohashi, Minoru Kotato
  • Publication number: 20110274986
    Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode having a positive-electrode active material, a negative electrode having a negative-electrode active material, and a nonaqueous electrolytic solution having a nonaqueous solvent dissolving a solute. The negative-electrode active material includes powdered silicon and/or a silicon alloy, the nonaqueous electrolytic solution includes additives composed of at least one fluorinated lithium phosphate selected from the group consisting of lithium monofluorophosphate, lithium difluorophosphate, and lithium trifluorophosphate and a diisocyanate compound, and the nonaqueous solvent includes a chain carbonate compound.
    Type: Application
    Filed: May 9, 2011
    Publication date: November 10, 2011
    Applicants: MITSUBISHI CHEMICAL CORPORATION, SANYO ELECTRIC CO., LTD.
    Inventors: Hidekazu Yamamoto, Kouhei Tuduki, Taizou Sunano, Maruo Kamino, Youichi Ohashi, Minoru Kotato
  • Publication number: 20110200887
    Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode (1), a negative electrode (2) containing a negative electrode active material, a separator 3 interposed between the electrodes (1) and (2), and a non-aqueous electrolyte containing a non-aqueous solvent and a solute dissolved in the solvent. The non-aqueous electrolyte contains a compound represented by the following chemical formula (1): wherein n is an integer of from 2 to 6, each R represents a linear saturated hydrocarbon that may be an unsubstituted or may have a substituted group, and the Rs may be the same or different groups.
    Type: Application
    Filed: February 17, 2011
    Publication date: August 18, 2011
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Kouhei Tuduki, Hidekazu Yamamoto, Taizou Sunano, Maruo Kamino