Patents by Inventor Kyu Ju Kwak

Kyu Ju 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).

  • Publication number: 20250174712
    Abstract: A sulfur dioxide-based inorganic electrolyte solution is doped with an iodine compound. A method of manufacturing the inorganic electrolyte solution includes preparing a powder salt by mixing a metal chloride, aluminum chloride and an iodine compound, and synthesizing the inorganic electrolyte solution by injecting sulfur dioxide (SO2) gas into the powder salt. The inorganic electrolyte solution is represented by Chemical Formula 1: M·(AlCl(4-x)Ix)z·ySO2, where M is at least one selected from the group consisting of Li, Na, K, Ca, and Mg, 0<x?1, 0<y?6, and 1?z?2. Reliability and stability of the battery are improved by suppressing growth of dendrites and reducing overvoltage occurring during charging and discharging of the battery by performing pre-treatment of lithium metal using the inorganic electrolyte solution.
    Type: Application
    Filed: May 9, 2024
    Publication date: May 29, 2025
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION, IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
    Inventors: Kyu Ju Kwak, Ji Yong Lee, Won Keun Kim, Eun Ji Kwon, Samuel Seo, Yeon Jong Oh, Dong Hyun Lee, Sang Su Lee, Kyoung Han Ryu, Ji Ho Lim, Han Su Kim, Ji Whan Lee, Seong Hoon Choi, Seung Do Mun
  • Publication number: 20250070226
    Abstract: Disclosed are an ionic liquid, an electrolyte including the ionic liquid, and a lithium secondary battery including the same. The ionic liquid is capable of forming a film having high ionic conductivity on an anode upon reductive decomposition of cations contained therein, and delaying the decomposition of anions.
    Type: Application
    Filed: March 19, 2024
    Publication date: February 27, 2025
    Inventors: Kyu Ju Kwak, Ji Yong Lee, Won Keun Kim, Eun Ji Kwon, Yeon Jong Oh, Ji Ho Lim, Dong Hyun Lee, Sang Su Lee, Kyoung Han Ryu, Samuel Seo
  • Publication number: 20250006991
    Abstract: An electrolyte solution for a lithium secondary battery includes a salt of metal element as an additive and a lithium secondary battery including the same.
    Type: Application
    Filed: December 4, 2023
    Publication date: January 2, 2025
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION, Korea Advanced Institute of Science and Technology
    Inventors: Eun Ji Kwon, Ji Yong Lee, Won Keun Kim, Samuel Seo, Yeon Jong Oh, Kyu Ju Kwak, Dong Hyun Lee, Sang Su Lee, Kyoung Han Ryu, Ji Ho Lim, Nam Soon Choi, Jeong A Lee, Jeong Hwan Byun
  • Publication number: 20240088432
    Abstract: An embodiment sulfur dioxide-based inorganic electrolyte is provided in which the sulfur dioxide-based inorganic electrolyte is represented by a chemical formula M·(A1·Cl(4-x)Fx)z·ySO2. In this formula, M is a first element selected from the group consisting of Li, Na, K, Ca, and Mg, A1 is a second element selected from the group consisting of Al, Fe, Ga, and Cu, x satisfies a first equation 0?x?4, y satisfies a second equation 0?y?6, and z satisfies a third equation 1?z?2.
    Type: Application
    Filed: April 12, 2023
    Publication date: March 14, 2024
    Inventors: Kyu Ju Kwak, Won Keun Kim, Eun Ji Kwon, Samuel Seo, Yeon Jong Oh, Kyoung Han Ryu, Dong Hyun Lee, Han Su Kim, Ji Whan Lee, Seong Hoon Choi, Seung Do Mun
  • Publication number: 20230411697
    Abstract: An electrolyte includes a plurality of additives to form a multi-layered solid electrolyte interface layer. In addition, a lithium secondary battery including the same electrolyte is proposed.
    Type: Application
    Filed: December 23, 2022
    Publication date: December 21, 2023
    Applicants: HYUNDAI MOTORS COMPANY, KIA CORPORATION, Korea Advanced Institute of Science and Technology
    Inventors: Eun Ji Kwon, Won Keun Kim, Samuel Seo, Yeon Jong Oh, Kyu Ju Kwak, Dong Hyun Lee, Kyoung Han Ryu, Jun Kyu Park, Nam Soon Choi, Jeong A Lee, Sae Hun Kim
  • Publication number: 20230344008
    Abstract: Disclosed are a carbonate electrolyte and a lithium secondary battery including the same, in which the carbonate electrolyte includes a specific type of lithium salt at a high concentration equal to or greater than an appropriate level, thereby improving durability of the lithium secondary battery.
    Type: Application
    Filed: March 7, 2023
    Publication date: October 26, 2023
    Applicants: Hyundai Motor Company, Kia Corporation
    Inventors: Yeon Jong OH, Won Keun KIM, Eun Ji KWON, Kyu Ju KWAK, Dong Hyun LEE, Kyoung Han RYU, Samuel SEO
  • Publication number: 20230344009
    Abstract: Disclosed is an electrolyte for a secondary battery that includes an ionic liquid containing an ether functional group, thereby providing effects of lowering the viscosity and improving lithium ion conductivity even when a molecular weight is increased.
    Type: Application
    Filed: December 7, 2022
    Publication date: October 26, 2023
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION, University-Industry Cooperation Group of Kyung Hee University
    Inventors: Kyu Ju Kwak, Won Keun Kim, Eun Ji Kwon, Samuel Seo, Dong Hyun Lee, Kyoung Han Ryu, Yeon Jong Oh, Je Seung Lee, Dae Won Kim, Su Yeon Lee
  • Publication number: 20230327196
    Abstract: A gel polymer electrolyte manufactured through an in-situ crosslinking reaction. The gel polymer electrolyte may include a porous membrane in which a fluorine-based compound, a lithium salt, and a crosslinking agent including a graphene-based compound are crosslinked.
    Type: Application
    Filed: November 16, 2022
    Publication date: October 12, 2023
    Inventors: Eun Ji Kwon, Won Keun Kim, Samuel Seo, Yeon Jong Oh, Kyu Ju Kwak, Kyoung Han Ryu, Dong Hyun Lee, Jong Chan Lee, Da Un Jeong, Jin Sol Yook, Dong Gi Hong
  • Publication number: 20230318025
    Abstract: The present disclosure relates to an electrolyte for a lithium secondary battery, including an ionic liquid, and a lithium secondary battery having the same. Specifically, the electrolyte may include an ionic liquid containing a cation and an anion, and a lithium salt, and the cation may include a functional group containing an oxygen element.
    Type: Application
    Filed: December 12, 2022
    Publication date: October 5, 2023
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION
    Inventors: Kyu Ju Kwak, Won Keun Kim, Eun Ji Kwon, Jin Hyeok Cha, Yeon Jong Oh, Ji Hye Baek, Dong Hyun Lee, Kyoung Han Ryu, Samuel Seo
  • Publication number: 20230069409
    Abstract: Disclosed are a polymer gel electrolyte composition, a polymer gel electrolyte prepared from the composition, and a lithium secondary battery including the electrolyte are proposed. The polymer gel electrolyte may be formed by thermal cross-linking of the polymer gel electrolyte composition including an ether-based organic solvent with excellent compatibility with a lithium metal anode, a nitrate capable of forming a stable film on an electrode surface, and an appropriate ratio of a cross-linking agent having two or more acrylate functional groups. Therefore, the polymer gel electrolyte can smoothly penetrate the anode to form an ion transport channel and improve oxidation stability through interaction between the polymer and the solvent thereof, thereby improving battery life.
    Type: Application
    Filed: August 30, 2022
    Publication date: March 2, 2023
    Inventors: Eun Ji Kwon, Samuel Seo, Won Kuen Kim, Kyoung Han Ryu, Kyu Ju Kwak, Yeon Jong Oh, Dong Won Kim, Ji Wan Kim, Bo Hyung Lee, Myung Keun Oh, Hyun Sik Woo