Patents by Inventor Sumitoshi Yajima

Sumitoshi Yajima 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 oxide containing lithum, nickel, cobalt, manganese, and fluorine, process for producing the same, and lithium secondary cell employing it
    Publication number: 20060057466
    Abstract: There is obtained an active material for a lithium secondary battery that has a wide usable voltage range, a high charge-discharge cycle durability, a high capacity and high safety and availability. The particles of a lithium-nickel-cobalt-manganese-fluorine-containing composite oxide having an R-3m rhombohedral structure represented by a general formula LipNixMn1-x-yCoyO2-qFq (where 0.98?p?1.07, 0.3?x?0.5, 0.1?y?0.38, and 0?q?0.05), and the particles of the lithium-nickel-cobalt-manganese-fluorine-containing composite oxide characterized in that the half-width of the diffraction peak of a (110) plane whose 2? is 65±0.5° in the X-ray diffraction using a Cu—K? line is, 0.12 to 0.25° are used as an active substance for a positive electrode.
    Type: Application
    Filed: July 7, 2004
    Publication date: March 16, 2006
    Applicant: Seimi Chemical Co., Ltd.
    Inventors: Manabu Suhara, Takuya Mihara, Sumitoshi Yajima, Koichiro Ueda, Yukimitsu Wakasugi