Patents by Inventor Dong Hak Kwak

Dong Hak Kwak 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).

  • Patent number: 7829219
    Abstract: A cathode for lithium secondary batteries coated with a slurry including an active material, a binder and a solvent, and further including a polymerization inhibitor, is disclosed. Gelation of the slurry is prevented during production of the cathode so that adhesion of the slurry is enhanced, thus achieving improved coating properties of the cathode and facilitating the coating of the slurry.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: November 9, 2010
    Assignee: Ecopro Co. Ltd.
    Inventors: Hui Chan Yun, Jong Seob Kim, Ho Seok Yang, Young Ki Lee, Dong Hak Kwak
  • Patent number: 7625670
    Abstract: Provided are a cathode active material for a non-aqueous electrolyte lithium secondary battery, a process for preparing the same and a lithium secondary battery comprising the same. The cathode active material for a non-aqueous electrolyte lithium secondary battery is represented by the formula LiaNi1?(v+w+x+y+z)MnvCowMxM?yM?zO2 wherein M, M? and M? are independently selected from the group consisting of Al, Mg, Sr, Ca, P, Pb, Y and Zr, and mixtures thereof, a is in a range of 0.9 to 1.05, 1?(v+w+x+y+z) is in a range of 0.685 to 0.745, v is in a range of 0.05 to 0.06, w is in a range of 0.20 to 0.24, and x+y+z is in a range of 0.005 to 0.015.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: December 1, 2009
    Assignee: Ecopro Co. Ltd.
    Inventors: Young Ki Lee, Dong Hak Kwak, Hui Chan Yun, Jong Seob Kim