Patents by Inventor DEEPAK KARTHIKEYAN

DEEPAK KARTHIKEYAN 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).

  • Fluorine doped lithium rich metal oxide positive electrode battery materials with high specific capacity and corresponding batteries
    Patent number: 8916294
    Abstract: Lithium rich metal oxyfluorides are described with high specific capacity and, good cycling properties. The materials have particularly good high rate capabilities. The fluorine dopant can be introduced in a low temperature process to yield the materials with desirable cycling properties. In some embodiments, the positive electrode active materials have a composition represented approximately by the formula Li1+xNi?Mn?Co?A?O2?zFz where: x is from about 0.02 to about 0.19, ? is from about 0.1 to about 0.4, ? is from about 0.35 to about 0.869, ? is from about 0.01 to about 0.2, ? is from 0.0 to about 0.1 and z is from about 0.01 to about 0.2, where A is Mg, Zn, Al, Ga, B, Zr, Ti, Ca, Ce, Y, Nb or combinations thereof.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: December 23, 2014
    Assignee: Envia Systems, Inc.
    Inventors: Sujeet Kumar, Herman Lopez, Subramanian Venkatachalam, Deepak Karthikeyan
  • FLUORINE DOPED LITHIUM RICH METAL OXIDE POSITIVE ELECTRODE BATTERY MATERIALS WITH HIGH SPECIFIC CAPACITY AND CORRESPONDING BATTERIES
    Publication number: 20100086854
    Abstract: Lithium rich metal oxyfluorides are described with high specific capacity and, good cycling properties. The materials have particularly good high rate capabilities. The fluorine dopant can be introduced in a low temperature process to yield the materials with desirable cycling properties. In some embodiments, the positive electrode active materials have a composition represented approximately by the formula Li1+xNi?Mn?Co?A?O2?zFz where: x is from about 0.02 to about 0.19, ? is from about 0.1 to about 0.4, ? is from about 0.35 to about 0.869, ? is from about 0.01 to about 0.2, ? is from 0.0 to about 0.1 and z is from about 0.01 to about 0.2, where A is Mg, Zn, Al, Ga, B, Zr, Ti, Ca, Ce, Y, Nb or combinations thereof.
    Type: Application
    Filed: September 29, 2009
    Publication date: April 8, 2010
    Inventors: SUJEET KUMAR, HERMAN LOPEZ, SUBRAMANIAN VENKATACHALAM, DEEPAK KARTHIKEYAN