Patents by Inventor Jiyun HEO

Jiyun HEO 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).

  • Method of preparing high-purity electrolyte solution for vanadium redox flow battery using catalytic reaction
    Patent number: 11682784
    Abstract: The present invention relates to a method of preparing a high-purity electrolyte solution for a vanadium redox flow battery using a catalytic reaction, and more specifically, to a method of preparing a high-purity electrolyte solution having a vanadium oxidation state of +3 to +5 from a mixture solution containing a vanadium precursor, a reducing agent, and an acidic solution, by using a catalyst. By using a catalyst and a reducing agent that does not leave impurities such as Zn2+, which are generated when preparing electrolyte solutions using an existing metal reducing agent, the high-purity electrolyte solution for a vanadium redox flow battery (VRFB) according to the present invention eliminates the need for an additional electrolysis process; does not form toxic substances during a reaction process, and thus is environmentally friendly; and is electrochemically desirable under milder process conditions than that of an existing process.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: June 20, 2023
    Assignee: LOTTE CHEMICAL CORPORATION
    Inventors: Hee-Tak Kim, Jiyun Heo
  • METHOD OF PREPARING HIGH-PURITY ELECTROLYTE SOLUTION FOR VANADIUM REDOX FLOW BATTERY USING CATALYTIC REACTION
    Publication number: 20200411894
    Abstract: The present invention relates to a method of preparing a high-purity electrolyte solution for a vanadium redox flow battery using a catalytic reaction, and more specifically, to a method of preparing a high-purity electrolyte solution having a vanadium oxidation state of +3 to +5 from a mixture solution containing a vanadium precursor, a reducing agent, and an acidic solution, by using a catalyst. By using a catalyst and a reducing agent that does not leave impurities such as Zn2+, which are generated when preparing electrolyte solutions using an existing metal reducing agent, the high-purity electrolyte solution for a vanadium redox flow battery (VRFB) according to the present invention eliminates the need for an additional electrolysis process; does not form toxic substances during a reaction process, and thus is environmentally friendly; and is electrochemically desirable under milder process conditions than that of an existing process.
    Type: Application
    Filed: February 25, 2019
    Publication date: December 31, 2020
    Inventors: Hee-Tak KIM, Jiyun HEO