Patents by Inventor Makiko Uehara

Makiko Uehara 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).

  • LITHIUM ION SECONDARY BATTERY
    Publication number: 20130122373
    Abstract: Provided is a lithium ion secondary battery which is low in capacity drop of the battery during fast-charge and has high energy density. In the present lithium ion secondary battery, the positive electrode contains a lithium nickel manganese oxide represented by formula (I): LixNiaM1bMn2-a-bO4 ??(I) (In formula (I), M1 represents at least one selected from the group consisting of Ti, Si, Co, Fe, Cr, Al, Mg, B and Li; 0<x?1; 0.4?a?0.6; and 0?b?0.4) and having a specific surface area of 0.2 to 1 m2g?1; and the negative electrode contains a lithium titanium oxide represented by formula (II): LiyTi5/3-cM2cO4 ??(II) (in formula (II), M2 represents at least one selected from the group consisting of Ta, Zr, Cr, Ni and V; 4/3 y 7/3 and 0?c<0.1) and having a specific surface area of 4 to 20 m2g?1.
    Type: Application
    Filed: July 22, 2011
    Publication date: May 16, 2013
    Applicant: NEC ENERGY DEVICES, LTD.
    Inventors: Hidetoshi Tamura, Takehiro Noguchi, Makiko Uehara