Patents by Inventor Tae-kyoung Lee

Tae-kyoung Lee 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: 20250125380
    Abstract: A catalyst electrode including a metal layer and a catalyst layer formed on the metal layer is provided. The catalyst layer includes silver and iridium. A membrane electrode assembly and a method for manufacturing a catalyst electrode are also provided.
    Type: Application
    Filed: October 11, 2024
    Publication date: April 17, 2025
    Inventors: Yun Ji Lim, Hyun Su Han, Tae Kyoung Lee, Soo Bean Kim, Tae Hong Seok
  • Publication number: 20250125381
    Abstract: A catalyst electrode including a metal layer and a catalyst layer formed on the metal layer is provided. The catalyst layer includes iridium and palladium. A membrane electrode assembly and a method for manufacturing a catalyst electrode are also provided.
    Type: Application
    Filed: October 11, 2024
    Publication date: April 17, 2025
    Inventors: Soo Bean Kim, Hyun Su Han, Tae Kyoung Lee, Tae Hong Seok, Yun Ji Lim
  • Publication number: 20250034731
    Abstract: Disclosed are an electrochemical hybrid catalyst that has a configuration in which two species of single atomic metals, that is, nickel (Ni) and iron (Fe), each bonded to (coordinated with) nitrogen in a nitrogen-doped carbon nanostructure, are adjacent to each other and are indirectly linked via nitrogen to form a catalyst site or an active site and thus exhibits high carbon monoxide selectivity and current density at a low overpotential during reduction reaction for converting carbon dioxide into carbon monoxide, and a carbon dioxide conversion system using the same.
    Type: Application
    Filed: May 9, 2024
    Publication date: January 30, 2025
    Inventors: Hyun Su HAN, Ju Hwan IM, Seung Ok LEE, Tae Kyoung LEE, Soo Bean KIM, Tae Hong SEOK, Yun Ji LIM
  • Patent number: 12132198
    Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes a lithium-transition metal composite oxide particle including a plurality of primary particles, and the lithium-transition metal composite oxide particle includes a lithium-sulfur-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.
    Type: Grant
    Filed: November 25, 2022
    Date of Patent: October 29, 2024
    Assignee: SK ON CO., LTD.
    Inventors: Sang Bok Kim, Sang Hye Shin, Sang Min Park, Tae Kyoung Lee, Myoung Lae Kim, Jeong Bae Yoon, Jik Soo Kim, Ji Hoon Choi
  • Publication number: 20240349637
    Abstract: Embodiments relate to a method for presetting a compensation angle for steering clearance, an apparatus for performing same, and an autonomous agricultural machine in which the apparatus is installed, the method comprising: driving an agricultural machine while a steering wheel is in a reference state; supplying a control signal to a steering control motor so that the steering wheel rotates in one direction in the reference state; receiving, by a calculation unit, a measurement result of the control signal from a current sensor; and determining a compensation angle for the steering clearance on the basis of a current measurement result of the control signal.
    Type: Application
    Filed: July 3, 2024
    Publication date: October 24, 2024
    Applicant: GINT CO., LTD.
    Inventors: Yong Hyeon KIM, Seung Rak SON, Tae Kyoung LEE
  • Patent number: 12107256
    Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes lithium-transition metal composite oxide particles including a plurality of primary particles, and the lithium-transition metal composite oxide particles have a lithium-potassium-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.
    Type: Grant
    Filed: January 4, 2023
    Date of Patent: October 1, 2024
    Assignee: SK ON CO., LTD.
    Inventors: Sang Min Park, Tae Kyoung Lee, Sang Bok Kim, Jik Soo Kim, Sang Hye Shin, Yu Na Shim, Jeong Bae Yoon
  • Publication number: 20240204185
    Abstract: The cathode active material according to exemplary embodiments includes lithium metal oxide particle including a layered crystal structure and a cubic crystal structure, wherein the lithium metal oxide particle contains 80 mol % or more of nickel based on a total number of moles of all elements except for lithium and oxygen, and the lithium metal oxide particle includes the cubic crystal structure only in a region having a thickness of less than 200 nm from a surface thereof when analyzing a crystal structure thereof by a high-resolution transmission electron microscopy.
    Type: Application
    Filed: February 16, 2024
    Publication date: June 20, 2024
    Inventors: Yeong Bin YOO, Hee Jun KWEON, Tae Kyoung LEE, Ji Hoon CHOI, Kook Hyun HAN
  • Publication number: 20230238527
    Abstract: A cathode active material for a lithium secondary battery according to an embodiment of the present invention includes a lithium metal oxide particle that contains tungsten and has a secondary shape in which a plurality of primary particles are aggregated. The lithium metal oxide particle includes a sulfur-containing portion formed between the primary particles in an inner region of the lithium metal oxide particle.
    Type: Application
    Filed: January 20, 2023
    Publication date: July 27, 2023
    Inventors: Hee Jun Kweon, Sang Bok Kim, Sang Min Park, Sang Hye Shin, Tae Kyoung Lee, Ji Hoon Choi
  • Publication number: 20230238526
    Abstract: A cathode active material for a lithium secondary battery according to an embodiment of the present invention includes a plurality of a lithium-transition metal composite oxide particle having a shape of a secondary particle in which a plurality of primary particles are aggregated. The lithium-transition metal composite oxide particle includes a lithium-molybdenum-containing portion having a hexagonal close-packed structure formed between the primary particles.
    Type: Application
    Filed: January 19, 2023
    Publication date: July 27, 2023
    Inventors: Sang Min PARK, Hee Jun KWEON, Myoung Lae KIM, Sang Bok KIM, Jung Moon SUNG, Keum Jung YOON, Tae Kyoung LEE, Ji Hoon CHOI
  • Publication number: 20230207778
    Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes lithium-transition metal composite oxide particles including a plurality of primary particles, and the lithium-transition metal composite oxide particles have a lithium-potassium-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.
    Type: Application
    Filed: January 4, 2023
    Publication date: June 29, 2023
    Inventors: Sang Min Park, Tae Kyoung Lee, Sang Bok Kim, Jik Soo Kim, Sang Hye Shin, Yu Na Shim, Jeong Bae Yoon
  • Publication number: 20230197934
    Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes a lithium-transition metal composite oxide particle including a plurality of primary particles, and the lithium-transition metal composite oxide particle includes a lithium-sulfur-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.
    Type: Application
    Filed: February 24, 2023
    Publication date: June 22, 2023
    Inventors: Sang Bok KIM, Sang Hye SHIN, Sang Min PARK, Tae Kyoung LEE, Myoung Lae KIM, Jeong Bae YOON, Jik Soo KIM, Ji Hoon CHOI
  • Publication number: 20230187618
    Abstract: A cathode active material for a lithium secondary battery according to exemplary embodiments may include lithium metal oxide particles; and a coating layer which is formed on surfaces of the lithium metal oxide particles and contains a first metal and a second metal, wherein the coating layer may include a region having a predetermined tendency that the concentrations of the first metal and the second metal are changed. In addition, a method of manufacturing the cathode active material for a lithium secondary battery is provided.
    Type: Application
    Filed: December 5, 2022
    Publication date: June 15, 2023
    Inventors: Sung Soon PARK, Ji Hoon CHOI, Ji Sun LEE, Tae Kyoung LEE, Dong ll JANG
  • Publication number: 20230155129
    Abstract: A cathode active material for a sulfide-based all-solid-state battery according to embodiments of the present invention includes a first lithium-transition metal composite oxide particle having a secondary particle structure that includes a plurality of primary particles therein. The first lithium-transition metal composite oxide particle includes a lithium-sulfur-containing portion formed between the primary particles.
    Type: Application
    Filed: November 11, 2022
    Publication date: May 18, 2023
    Inventors: Sang Min PARK, Hee Jun KWEON, Sang Bok KIM, Tae Kyoung LEE, Ji Hoon CHOI
  • Patent number: 11637279
    Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes a lithium-transition metal composite oxide particle including a plurality of primary particles, and the lithium-transition metal composite oxide particle includes a lithium-sulfur-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.
    Type: Grant
    Filed: October 27, 2021
    Date of Patent: April 25, 2023
    Assignee: SK ON CO., LTD.
    Inventors: Sang Bok Kim, Sang Hye Shin, Sang Min Park, Tae Kyoung Lee, Myoung Lae Kim, Jeong Bae Yoon, Jik Soo Kim, Ji Hoon Choi
  • Publication number: 20230105644
    Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes a lithium-transition metal composite oxide particle including a plurality of primary particles, and the lithium-transition metal composite oxide particle includes a lithium-sulfur-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.
    Type: Application
    Filed: November 25, 2022
    Publication date: April 6, 2023
    Inventors: Sang Bok KIM, Sang Hye Shin, Sang Min Park, Tae Kyoung Lee, Myoung lae Kim, Jeong Bae Yoon, Jik Soo Kim, Ji Hoon Choi
  • Patent number: 11621412
    Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes lithium-transition metal composite oxide particles including a plurality of primary particles, and the lithium-transition metal composite oxide particles have a lithium-potassium-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.
    Type: Grant
    Filed: November 23, 2021
    Date of Patent: April 4, 2023
    Assignee: SK ON CO., LTD.
    Inventors: Sang Min Park, Tae Kyoung Lee, Sang Bok Kim, Jik Soo Kim, Sang Hye Shin, Yu Na Shim, Jeong Bae Yoon
  • Publication number: 20220367851
    Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes a lithium-transition metal composite oxide particle including a plurality of primary particles, and the lithium-transition metal composite oxide particle includes a lithium-sulfur-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.
    Type: Application
    Filed: October 27, 2021
    Publication date: November 17, 2022
    Inventors: Sang Bok KIM, Sang Hye SHIN, Sang Min PARK, Tae Kyoung LEE, Myoung Lae KIM, Jeong Bae YOON, Jik Soo KIM, Ji Hoon CHOI
  • Publication number: 20220320507
    Abstract: A cathode active material for a lithium secondary battery according to embodiments of the present invention has a high-nickel composition and includes a lithium-nickel composite metal oxide particle in which lithium, nickel and a metal having an oxidation number of +2 are combined in a predetermined range. A cation disorder caused when a nickel ion is present at a lithium-ion site is reduced to improve structural stability of the cathode active material. An initial capacity and a battery efficiency of a lithium secondary battery can be improved using the cathode active material.
    Type: Application
    Filed: March 29, 2022
    Publication date: October 6, 2022
    Inventors: Mi Jung NOH, Jik Soo KIM, Jae Ho CHOI, Tae Kyoung LEE, Sang Bok KIM, Sang Min PARK
  • Publication number: 20220310997
    Abstract: A cathode active material for a lithium secondary battery according to embodiments of the present invention has a high-nickel composition and includes a lithium-nickel composite metal oxide particle in which lithium, nickel and a metal having an oxidation number of +2 are combined in a predetermined range. A cation disorder caused when a nickel ion is present at a lithium-ion site is reduced to improve structural stability of the cathode active material. An initial capacity and a battery efficiency of a lithium secondary battery can be improved using the cathode active material.
    Type: Application
    Filed: October 27, 2021
    Publication date: September 29, 2022
    Inventors: Mi Jung NOH, Jik Soo KIM, Jae Ho CHOI, Tae Kyoung LEE, Sang Bok KIM, Sang Min PARK
  • Publication number: 20220293920
    Abstract: A cathode active material for a secondary battery includes a lithium metal oxide particle having a secondary particle structure in which a plurality of primary particles are aggregated, a first coating portion formed on at least a portion of a surface of the lithium metal oxide particle, the first coating portion including a first metal, and a second coating portion formed on at least a portion of an interface between the primary particles, the second coating portion including a second metal. A secondary battery including the cathode active material is provided.
    Type: Application
    Filed: March 15, 2022
    Publication date: September 15, 2022
    Inventors: Hee Jun KWEON, Sung Soon PARK, Jik Soo KIM, Tae Kyoung LEE, Ji Hoon CHOI, Dong Wook HA