Patents by Inventor Yu Song CHOI

Yu Song CHOI 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: 11912917
    Abstract: A method of manufacturing quantum dots includes placing nickel powder having a certain particle size, a precursor material, and an organic solvent into a container, maintaining a pressure in the container at a certain value, and synthesizing quantum dots by stirring the nickel powder, the precursor material, and the organic solvent in the container.
    Type: Grant
    Filed: May 20, 2021
    Date of Patent: February 27, 2024
    Assignee: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Yu Song Choi, Tae Young Ahn, Min U Kim, Jang Hyeon Cho
  • Publication number: 20230411590
    Abstract: A lithium anode of a thermal battery may include a metal alloy foam in which a plurality of pores is formed and including nickel (Ni), iron (Fe), chromium (Cr), and aluminum (Al) mixed in a predetermined composition ratio, and lithium impregnated into the metal alloy foam in a molten state and accommodated in the pores, wherein the chromium in the composition ratio may facilitate the impregnation of the lithium into the pores and reduce the reactivity of the metal alloy foam to the lithium at an operating temperature of the thermal battery, and the aluminum in the composition ratio may facilitate the impregnation of the lithium into the pores and prevent the lithium from penetrating into a surface of the metal alloy foam.
    Type: Application
    Filed: September 1, 2023
    Publication date: December 21, 2023
    Inventors: Yu Song CHOI, Tae Young AHN, Jang Hyeon CHO
  • Patent number: 11784299
    Abstract: A lithium anode of a thermal battery may include a metal alloy foam in which a plurality of pores is formed and including nickel (Ni), iron (Fe), chromium (Cr), and aluminum (Al) mixed in a predetermined composition ratio, and lithium impregnated into the metal alloy foam in a molten state and accommodated in the pores, wherein the chromium in the composition ratio may facilitate the impregnation of the lithium into the pores and reduce the reactivity of the metal alloy foam to the lithium at an operating temperature of the thermal battery, and the aluminum in the composition ratio may facilitate the impregnation of the lithium into the pores and prevent the lithium from penetrating into a surface of the metal alloy foam.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: October 10, 2023
    Assignee: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Yu Song Choi, Tae Young Ahn, Jang Hyeon Cho
  • Publication number: 20230174856
    Abstract: A method of manufacturing quantum dots includes placing nickel powder having a certain particle size, a precursor material, and an organic solvent into a container, maintaining a pressure in the container at a certain value, and synthesizing quantum dots by stirring the nickel powder, the precursor material, and the organic solvent in the container.
    Type: Application
    Filed: May 20, 2021
    Publication date: June 8, 2023
    Inventors: Yu Song CHOI, Tae Young AHN, Min U KIM, Jang Hyeon CHO
  • Patent number: 11508959
    Abstract: A lithium coating method includes: coating an oxide layer having lithiophilic properties on a metal material by heating the metal material at a certain temperature; and coating a lithium layer on the oxide layer by bringing the metal material coated with the oxide layer into contact with molten lithium.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: November 22, 2022
    Assignee: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Yu Song Choi, Tae Young Ahn, Hye Ryeon Yu, Jang Hyeon Cho
  • Publication number: 20220293916
    Abstract: A lithium coating method includes: coating an oxide layer having lithiophilic properties on a metal material by heating the metal material at a certain temperature; and coating a lithium layer on the oxide layer by bringing the metal material coated with the oxide layer into contact with molten lithium.
    Type: Application
    Filed: May 21, 2020
    Publication date: September 15, 2022
    Inventors: Yu Song CHOI, Tae Young AHN, Hye Ryeon YU, Jang Hyeon CHO
  • Publication number: 20210126239
    Abstract: A lithium anode of a thermal battery may include a metal alloy foam in which a plurality of pores is formed and including nickel (Ni), iron (Fe), chromium (Cr), and aluminum (Al) mixed in a predetermined composition ratio, and lithium impregnated into the metal alloy foam in a molten state and accommodated in the pores, wherein the chromium in the composition ratio may facilitate the impregnation of the lithium into the pores and reduce the reactivity of the metal alloy foam to the lithium at an operating temperature of the thermal battery, and the aluminum in the composition ratio may facilitate the impregnation of the lithium into the pores and prevent the lithium from penetrating into a surface of the metal alloy foam.
    Type: Application
    Filed: October 14, 2019
    Publication date: April 29, 2021
    Applicant: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Yu Song CHOI, Tae Young AHN, Jang Hyeon CHO
  • Patent number: 9647260
    Abstract: Disclosed is a method of manufacturing an anode for a thermally activated reserve battery using a thin metal foam and a cup, which includes rolling a metal foam, coating the metal foam with a molten eutectic salt, impregnating the metal foam with lithium, and providing the metal foam with an electrode cup and a conductive separation membrane, and in which lithium having excellent capacity and output characteristics is employed in an anode for a thermal battery operating at high temperature.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: May 9, 2017
    Assignee: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Yu Song Choi, Hye-Ryeon Yu, Jung Min Lee, Hae Won Cheong
  • Publication number: 20160276651
    Abstract: Disclosed is a method of manufacturing an anode for a thermally activated reserve battery using a thin metal foam and a cup, which includes rolling a metal foam, coating the metal foam with a molten eutectic salt, impregnating the metal foam with lithium, and providing the metal foam with an electrode cup and a conductive separation membrane, and in which lithium having excellent capacity and output characteristics is employed in an anode for a thermal battery operating at high temperature.
    Type: Application
    Filed: July 28, 2014
    Publication date: September 22, 2016
    Inventors: Yu Song CHOI, Hye-Ryeon YU, Jung Min LEE, Hae Won CHEONG