Patents by Inventor Mori Nagayama

Mori Nagayama 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).

  • Cathode formed of graphite/carbon composite for lithium ion secondary battery
    Patent number: 6139989
    Abstract: A high crystallinity powdery graphite is mixed with an organic binder capable of forming a low crystallinity carbon after firing. A high shearing force is applied to the mixture so that a composition is obtained wherein both the components are dispersed in each other under a mechano-chemical reaction. Then a paste of the composition is extruded so that the high crystallinity graphite is highly oriented. A green extrudate of the composition is fired in an inert atmosphere or a non-oxidation atmosphere at a temperature in a range between 500 and 1,100.degree. C. so that the organic binder contained therein is carbonized and a graphite-carbon carbonaceous composite of an amorphous or random layered structure is obtained, which then is ground and used as a cathode for a lithium ion secondary battery.
    Type: Grant
    Filed: February 21, 1996
    Date of Patent: October 31, 2000
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Takamasa Kawakubo, deceased, Masataka Wakihara, Mori Nagayama