Patents by Inventor Hyoungjeen Jeen

Hyoungjeen Jeen 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).

  • Strontium cobaltite oxygen sponge catalyst and methods of use
    Patent number: 9550166
    Abstract: Rapid, reversible redox activity may be accomplished at significantly reduced temperatures, as low as about 200° C., from epitaxially stabilized, oxygen vacancy ordered SrCoO2.5 and thermodynamically unfavorable perovskite SrCoO3-?. The fast, low temperature redox activity in SrCoO3-? may be attributed to a small Gibbs free energy difference between the two topotactic phases. Epitaxially stabilized thin films of strontium cobaltite provide a catalyst adapted to rapidly transition between oxidation states at substantially low temperatures. Methods of transitioning a strontium cobaltite catalyst from a first oxidation state to a second oxidation state are described.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: January 24, 2017
    Assignee: UT-BATTELLE, LLC
    Inventors: Ho Nyung Lee, Hyoungjeen Jeen, Woo Seok Choi, Michael Biegalski, Chad M. Folkman, I-Cheng Tung, Dillon D. Fong, John W. Freeland, Dongwon Shin, Hiromichi Ohta, Matthew F. Chisholm
  • STRONTIUM COBALTITE OXYGEN SPONGE CATALYST AND METHODS OF USE
    Publication number: 20150148218
    Abstract: Rapid, reversible redox activity may be accomplished at significantly reduced temperatures, as low as about 200° C., from epitaxially stabilized, oxygen vacancy ordered SrCoO2.5 and thermodynamically unfavorable perovskite SrCoO3-?. The fast, low temperature redox activity in SrCoO3-? may be attributed to a small Gibbs free energy difference between the two topotactic phases. Epitaxially stabilized thin films of strontium cobaltite provide a catalyst adapted to rapidly transition between oxidation states at substantially low temperatures. Methods of transitioning a strontium cobaltite catalyst from a first oxidation state to a second oxidation state are described.
    Type: Application
    Filed: November 26, 2013
    Publication date: May 28, 2015
    Inventors: Ho Nyung Lee, Hyoungjeen Jeen, Woo Seok Choi, Michael Biegalski, Chad M. Folkman, I-Cheng Tung, Dillon D. Fong, John W. Freeland, Dongwon Shin, Hiromichi Ohta, Matthew F. Chisholm