Patents by Inventor Dong-joon Ihm

Dong-joon Ihm 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).

  • Composition for forming electrode active material of lithium secondary battery, composition for forming separator and method of preparing lithium secondary battery using the compositions
    Patent number: 6692873
    Abstract: An electrode active material forming composition, a separator forming composition and a manufacturing method of a lithium secondary battery using the compositions are provided.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: February 17, 2004
    Assignee: SKC Co., Ltd.
    Inventors: Chi-kyun Park, Archana Kakirde, Peikang Liu, Venkatesan Manivannan, Chul Chai, Dong-joon Ihm, Jon-ha Lee, Kwon-sun Roh
  • Lithium secondary battery
    Patent number: 6503661
    Abstract: A composition for forming polymer electrolyte and a lithium secondary battery employing the polymer electrolyte prepared using the composition are provided. The composition for forming polymer solid electrolyte having a polymer resin, a plasticizer, a filler and a solvent, wherein the filler is synthetic zeolite having an affinity for an organic solvent or moisture. Therefore, the mechanical strength and ionic conductivity can be improved by adding synthetic zeolite as a filler when forming polymer electrolyte. Also, use of such polymer electrolyte makes it possible to prepare lithium secondary batteries having good high-current discharge characteristics and excellent discharge capacity characteristics even under repeated charge/discharge conditions.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: January 7, 2003
    Assignee: SKC Co., Ltd.
    Inventors: Chi-kyun Park, Archana Kakirde, Peikang Liu, Venkatesan Manivannan, Chul Chai, Dong-joon Ihm, Jon-ha Lee
  • Lithium battery and method for the preparation thereof
    Publication number: 20030003367
    Abstract: The present invention provides a lithium battery having improved performance properties and no risk of electrolyte leakage which comprises both a liquid electrolyte and a gel-type electrolyte.
    Type: Application
    Filed: May 9, 2002
    Publication date: January 2, 2003
    Inventors: Kwon-Sun Roh, Dong-Joon Ihm, Jon-Ha Lee
  • Liquid electrolyte composition and lithium battery comprising same
    Publication number: 20020187404
    Abstract: A liquid electrolyte composition comprising a sulfide of a IV-group element, an organic solvent and a lithium salt is advantageously used for the preparation of a lithium battery having improved mean voltage, cycling life and capacity properties.
    Type: Application
    Filed: April 5, 2002
    Publication date: December 12, 2002
    Inventors: Kwon-Sun Roh, Dong-Joon Ihm, Jon-Ha Lee
  • Polymer electrolyte precursor having improved impedence
    Publication number: 20020172859
    Abstract: A polymer electrolyte precursor comprising a VdF-HFP copolymer, a lithium and a plasticizer is used for the preparation of a bellcore-type polymer battery having improved impedence, low-temperature characteristics, cycle life and self-discharge properties.
    Type: Application
    Filed: May 9, 2002
    Publication date: November 21, 2002
    Inventors: Kwon-Sun Roh, Jong-Hyuk Choi, Dong-Joon Ihm, Jon-Ha Lee