Patents Assigned to PETOCA MATERIALS, LTD.
  • Graphite material for negative electrode of lithium ion secondary battery and process for producing the same
    Publication number: 20020160266
    Abstract: According to the present invention, milled carbon fiber is mixed with a boron compound and graphitized in the presence of nitrogen, and thereafter subjected to modifying treatment by applying impact selectively to fiber edge parts of the carbon fiber.
    Type: Application
    Filed: February 28, 2002
    Publication date: October 31, 2002
    Applicant: PETOCA MATERIALS, LTD.
    Inventors: Yoshinori Yamazaki, Toshifumi Kawamura, Tetsuo Yamamoto, Toshio Tamaki