Patents by Inventor Jeong A Gu

Jeong A Gu 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: 20250023040
    Abstract: Disclosed is a cathode active material including a one-body core containing lithium transition metal oxide, and a composite coating layer located on the one-body core, wherein the composite coating layer includes a crystalline coating part and an amorphous coating part.
    Type: Application
    Filed: December 1, 2022
    Publication date: January 16, 2025
    Inventors: Da Jeong PARK, Jun Sung LEE, Jeong A GU, Sung Kyun CHANG
  • Patent number: 12027697
    Abstract: Disclosed, as a particle for cathode active materials, is a novel one-body particle for cathode active materials, including a core of lithium transition metal oxide containing Ni and a surface-layer portion formed on at least a part of the core, wherein the surface-layer portion contains both Co and a structure-stabilizing element, the core is present as a non-aggregated primary particle, and the structure-stabilizing element has a bond dissociation energy (BDE) with oxygen (O) greater than a bond dissociation energy (BDE) of Co and oxygen (O).
    Type: Grant
    Filed: October 22, 2021
    Date of Patent: July 2, 2024
    Assignee: L&F CO., LTD.
    Inventors: Hyun Gyu Han, Han Ah Kim, Gi Hwan Chang, Jeong A Gu, Sung Kyun Chang, Doe Hyoung Kim
  • Publication number: 20240038973
    Abstract: Disclosed, as a particle for cathode active materials, is a novel one-body particle for cathode active materials, including a core of lithium transition metal oxide containing Ni and a surface-layer portion formed on at least a part of the core, wherein the surface-layer portion contains both Co and a structure-stabilizing element, the core is present as a non-aggregated primary particle, and the structure-stabilizing element has a bond dissociation energy (BDE) with oxygen (O) greater than a bond dissociation energy (BDE) of Co and oxygen (O).
    Type: Application
    Filed: October 22, 2021
    Publication date: February 1, 2024
    Inventors: Hyun Gyu HAN, Han Ah KIM, Gi Hwan CHANG, Jeong A GU, Sung Kyun CHANG, Doe Hyoung KIM
  • Publication number: 20220344653
    Abstract: Disclosed is a cathode active material for lithium secondary batteries containing lithium transition metal composite oxide in the form of primary particles having a one-body structure, the cathode active material having a ratio (R/L) of a right area (R) to a left area (L) in a particle size distribution (PSD) graph of less than 1.1, based on a maximum point of a main peak in the particle size distribution (PSD) graph, in which an X-axis represents a particle size (?m) and a Y-axis represents a relative particle amount (%).
    Type: Application
    Filed: September 25, 2019
    Publication date: October 27, 2022
    Inventors: Sung Kyun CHANG, Jeong A GU, Hyun Gyu HAN, Han Ah KIM
  • Patent number: 10903486
    Abstract: A positive active material for a rechargeable lithium battery, a method for manufacturing the same, and a rechargeable lithium battery including the same are provided. A positive active material for a rechargeable lithium battery includes a compound that is capable of reversibly intercalating or deintercalating lithium, wherein the compound is formed of a core portion and a coating layer, the core portion is doped with M, and the coating layer includes Al and B, wherein M is Zr, Ti, Mg, Ca, Al, B, V, Zn, Mo, Ni, Co, Mn, or a combination thereof.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: January 26, 2021
    Assignee: L&F CO., LTD.
    Inventors: Su An Choi, Sang Hoon Jeon, Chang Min Choi, Su Youn Kwon, Jeong A Gu, Bong Jun Jeong
  • Publication number: 20160336595
    Abstract: A positive active material for a rechargeable lithium battery, a method for manufacturing the same, and a rechargeable lithium battery including the same are provided. A positive active material for a rechargeable lithium battery includes a compound that is capable of reversibly intercalating or deintercalating lithium, wherein the compound is formed of a core portion and a coating layer, the core portion is doped with M, and the coating layer includes Al and B, wherein M is Zr, Ti, Mg, Ca, Al, B, V, Zn, Mo, Ni, Co, Mn, or a combination thereof.
    Type: Application
    Filed: July 27, 2016
    Publication date: November 17, 2016
    Inventors: Su An CHOI, Sang Hoon JEON, Chang Min CHOI, Su Youn KWON, Jeong A. GU, Bong Jun JEONG
  • Publication number: 20160028082
    Abstract: A cathode active material for a rechargeable lithium battery and a rechargeable lithium battery including the same, wherein the cathode active material includes a compound being capable of intercalating and deintercallating lithium, wherein the compound consists of a core part and a coating layer, and the core part is doped with M1 and M2 while the coating layer includes B, are provided. The M1 and M2 are independently at least one metal selected from Zr, Ti, Mg, Ca, V, Zn, Mo, Ni, Co, and Mn, and M1 and M2 are different.
    Type: Application
    Filed: September 25, 2015
    Publication date: January 28, 2016
    Inventors: Su An Choi, Sang-Hoon Jeon, Su Youn Kwon, Jeong A Gu, Hyun Chul Jung, Sung Woo Cho, Bong Jun Jeong