Patents by Inventor Akihisha TONEGAWA

Akihisha TONEGAWA 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).

  • COMPOSITE PARTICLES, NEGATIVE ELECTRODE MIXTURE LAYER AND LITHIUM-ION SECONDARY BATTERY
    Publication number: 20240250242
    Abstract: One embodiment of the present invention is composite particles containing silicon and carbon, which are characterized as follows. When the cross-sectional diameter and the silicon content rate of the composite particles are measured by cross-sectional SEM-EDS and composite particles having a cross-sectional diameter of half or less than the number average of the cross-sectional diameter are defined as small diameter composite particles, the proportion of the number of the small diameter composite particles in the number of the composite particles measured is 5% or more and 50% or less, the ratio of the average silicon content rate (% by mass) of particles other than the small diameter composite particles to the average silicon content rate (% by mass) of the small diameter composite particles is 0.90 or less, and the silicon content rate of the entire composite particles is 45% by mass or more.
    Type: Application
    Filed: May 26, 2022
    Publication date: July 25, 2024
    Applicant: Resonac Corporation
    Inventors: Yuji ITO, Masato FUJiTA, Akihisha TONEGAWA, Takayuki KURITA, Hirofumi INOUE