Patents by Inventor Yoshiho Masuda

Yoshiho Masuda 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 battery and method for producing negative electrode material for lithium-ion secondary battery
    Patent number: 11646406
    Abstract: A negative electrode material for a lithium-ion secondary battery is disclosed which contains a mass of graphite particle spherical aggregates in which a plurality of flat graphite particles are aggregated. The mass of the graphite particle spherical aggregates has an average circularity, D90/D10, and a crystallite size Lc (004) within a predetermined range, and the proportion of the graphite particle spherical aggregates in which the largest flat graphite particle observed on the outermost surface has a circle equivalent diameter of 2 ?m to 12 ?m in graphite particle spherical aggregates having a circle equivalent diameter of 10 ?m or more when observed by SEM is 80% or more.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: May 9, 2023
    Assignee: TOKAI CARBON CO., LTD.
    Inventors: Toshiki Yamazaki, Yoshiho Masuda
  • NEGATIVE ELECTRODE MATERIAL FOR LITHIUM-ION SECONDARY BATTERY AND METHOD FOR PRODUCING NEGATIVE ELECTRODE MATERIAL FOR LITHIUM-ION SECONDARY BATTERY
    Publication number: 20210020906
    Abstract: A negative electrode material for a lithium-ion secondary battery is disclosed which contains a mass of graphite particle spherical aggregates in which a plurality of flat graphite particles are aggregated. The mass of the graphite particle spherical aggregates has an average circularity, D90/D10, and a crystallite size Lc (004) within a predetermined range, and the proportion of the graphite particle spherical aggregates in which the largest flat graphite particle observed on the outermost surface has a circle equivalent diameter of 2 ?m to 12 ?m in graphite particle spherical aggregates having a circle equivalent diameter of 10 ?m or more when observed by SEM is 80% or more.
    Type: Application
    Filed: December 19, 2018
    Publication date: January 21, 2021
    Applicant: TOKAI CARBON CO., LTD.
    Inventors: Toshiki Yamazaki, Yoshiho Masuda