Patents by Inventor Joo Hyeong WOO

Joo Hyeong WOO 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).

  • CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY
    Publication number: 20230125905
    Abstract: Disclosed is a cathode active material for a lithium secondary battery including a core containing lithium composite metal oxide, and a coating layer disposed on the core and including an amorphous phase, wherein the amorphous phase contains lithium oxide and boron oxide in a form of mixture.
    Type: Application
    Filed: June 1, 2021
    Publication date: April 27, 2023
    Inventors: Jae Shin SHIN, Sung Kyun CHANG, Chang Min CHOI, Joo Hyeong WOO, Jae Joon JO
  • POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY
    Publication number: 20220367856
    Abstract: Disclosed is a cathode active material for a lithium secondary battery including a core containing lithium composite metal oxide and a coating layer disposed on the core and having an amorphous phase, wherein the amorphous phase contains lithium oxide and tungsten oxide in a form of mixture.
    Type: Application
    Filed: June 15, 2020
    Publication date: November 17, 2022
    Inventors: Joo Hyeong WOO, Sung Kyun CHANG, Sang Hoon JEON, Chang Min CHOI, Sung Woo CHO, Ji Sun AN
  • Cathode active material and lithium secondary battery comprising same
    Patent number: 11495791
    Abstract: The present invention relates to a cathode active material, and a lithium secondary battery comprising the same, the present invention provides a cathode active material, represented by the following Chemical Formula 1, wherein I003/I104 ratio is 1.6 or more, and R-factor value represented by the following Formula 1 is 0.40 to 0.44, and c-axis lattice constant (c) and a-axis lattice constant (a) satisfy 3(a)+5.555?(c)?3(a)+5.580: R-factor=(I102+I006)/(I101)??Formula 1 wherein I003, I006, I101, I102, and I104 are the intensity of diffraction peaks on the (003), (006), (101), (102), and (104) planes by X-ray diffraction analysis using CuK?-rays, Li?[(NixCoy)1-?A?]Oz??Chemical Formula 1 in the Chemical Formula 1, 0.95???1.1, 0.75?x?0.95, 0.03?y?0.25, 0<??0.2, and 1.9?z?2.1, and A is a dopant metal element, and the average oxidation number N of A is 3.05?N?3.35.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: November 8, 2022
    Assignee: L&F CO., LTD.
    Inventors: Ji Hyun Shin, Sun Hye Lim, Joo Hyeong Woo, Su An Choi, Sang Hoon Jeon, Ji Sun An
  • POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY
    Publication number: 20220263074
    Abstract: Disclosed is a cathode active material for a lithium secondary battery including a core containing lithium composite metal oxide and a coating layer disposed on the core and having an amorphous phase, wherein the amorphous phase contains lithium oxide, tungsten oxide, and boron oxide in a form of mixture.
    Type: Application
    Filed: June 15, 2020
    Publication date: August 18, 2022
    Inventors: Joo Hyeong WOO, Sung Kyun CHANG, Sang Hoon JEON, Chang Min CHOI, Sung Woo CHO, Ji Sun AN
  • Positive Electrode Active Material, and Lithium Secondary Battery Comprising Same
    Publication number: 20200203717
    Abstract: The present invention relates to a cathode active material, and a lithium secondary battery comprising the same, the present invention provides a cathode active material, represented by the following Chemical Formula 1, wherein I003/I104 ratio is 1.6 or more, and R-factor value represented by the following Formula 1 is 0.40 to 0.44, and c-axis lattice constant (c) and a-axis lattice constant (a) satisfy 3(a)+5.555?(c)?3(a)+5.580: R-factor=(I102+I006)/(I101)??Formula 1 wherein I003, I006, I101, I102, and I104 are the intensity of diffraction peaks on the (003), (006), (101), (102), and (104) planes by X-ray diffraction analysis using CuK?-rays, Li?[(NixCoy)1-?A?]Oz??Chemical Formula 1 in the Chemical Formula 1, 0.95???1.1, 0.75?x?0.95, 0.03?y?0.25, 0<??0.2, and 1.9?z?2.1, and A is a dopant metal element, and the average oxidation number N of A is 3.05?N?3.35.
    Type: Application
    Filed: November 27, 2017
    Publication date: June 25, 2020
    Inventors: Ji Hyun SHIN, Sun Hye LIM, Joo Hyeong WOO, Su An CHOI, Sang Hoon JEON, Ji Sun AN