Patents by Inventor Dong Wook Ha

Dong Wook Ha 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: 20240113277
    Abstract: In a method of manufacturing a cathode active material for a lithium secondary battery, a preliminary lithium metal oxide particle is prepared. The preliminary lithium metal oxide particle is cleaned using a boron compound cleaning solution. A cathode active material for a lithium secondary particle includes a lithium metal oxide particle where a ratio of a B+ peak intensity relative to a sum of peak intensities of Li+, B+ and LiB+ fragments by a TOF-SIMS analysis is in a range from 0.03% to 1.5%.
    Type: Application
    Filed: December 13, 2023
    Publication date: April 4, 2024
    Inventors: Sang Bok Kim, Ji Hoon Choi, Jik Soo Kim, Mi Jung Noh, Dong Il Jang, Dong Wook Ha
  • Patent number: 11944958
    Abstract: Disclosed herein are a catalyst for hydrocracking reaction of high molecular weight components in bio-oil, a method for preparing the same and a method for bio-oil upgrading using the same. The catalyst includes a zeolite carrier; and at least one metal selected from the group consisting of nickel (Ni), ruthenium (Ru) and cerium (Ce) supported on the carrier. The catalyst promotes the hydrocracking of high molecular weight compounds contained in the bio-oil, but also inhibits the polymerization reaction of the decomposed product, thereby more effectively enhancing the hydrocracking reaction of the bio-oil.
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: April 2, 2024
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Chunjae Yoo, Jeong-Myeong Ha, Dong Jin Suh, Jae Wook Choi, Young Hyun Yoon, Kyeongsu Kim, Chang Soo Kim, Kwang Ho Kim, Thi Lien Do
  • Publication number: 20240066503
    Abstract: Provided is a nitrogen oxide removing denitrification catalyst having high durability against sulfur dioxide, a preparing method of the same, and a method for removing nitrogen oxide using the same. The denitrification catalyst is a quaternary denitrification catalyst containing vanadium-molybdenum-antimony-titania used in a selective catalytic reduction (SCR) reaction using an ammonia reductant to remove nitrogen oxides included in exhaust gases, antimony, molybdenum and vanadium are carried on a titania carrier, and molybdenum and vanadium are combined to be present in a form of a complex oxide (V2MoO8).
    Type: Application
    Filed: March 30, 2023
    Publication date: February 29, 2024
    Inventors: Dong Wook KWON, Heon Phil HA, Min Gie JUNG
  • Publication number: 20240047646
    Abstract: A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer on the cathode current collector. The cathode active material layer includes a plurality of a lithium-metal oxide particle that has a shape of a single particle. An activation energy (Ea) of the cathode is in a range from 50 kJ/mol to 80 kJ/mol.
    Type: Application
    Filed: August 1, 2023
    Publication date: February 8, 2024
    Inventors: Sang Han LEE, Jung Hwan KIM, Jong Hyuk LEE, In Haeng CHO, Dong Wook HA
  • Patent number: 11888102
    Abstract: In a method of manufacturing a cathode active material for a lithium secondary battery, a preliminary lithium metal oxide particle is prepared. The preliminary lithium metal oxide particle is cleaned using a boron compound cleaning solution. A cathode active material for a lithium secondary particle includes a lithium metal oxide particle where a ratio of a B+ peak intensity relative to a sum of peak intensities of Li+, B+ and LiB+ fragments by a TOF-SIMS analysis is in a range from 0.03% to 1.5%.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: January 30, 2024
    Assignee: SK On Co., Ltd.
    Inventors: Sang Bok Kim, Ji Hoon Choi, Jik Soo Kim, Mi Jung Noh, Dong Il Jang, Dong Wook Ha
  • Patent number: 11830992
    Abstract: In a method for regenerating a lithium precursor, a lithium-containing waste mixture is put into a reactor. An inside of the reactor is replaced with carbon dioxide. Temperature raising treatment is performed on the lithium-containing waste mixture and the carbon dioxide to produce lithium carbonate and a transition metal-containing mixture. The lithium precursor may be recovered with high yield and high efficiency through dry treatment using carbon dioxide.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: November 28, 2023
    Assignee: SK Innovation Co., Ltd.
    Inventors: Yeon Hwa La, Dong Wook Ha
  • Publication number: 20230378460
    Abstract: A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer satisfying a specific formula formed on the cathode current collector. The cathode active material layer includes lithium metal oxide particles that have a single particle shape, and a single crystalline structure or a poly-crystalline structure including two or more single crystals. A lithium secondary battery including the cathode, and a method of preparing a cathode active material are also provided.
    Type: Application
    Filed: May 18, 2023
    Publication date: November 23, 2023
    Inventors: Sang Han LEE, Ju Wook LEE, Jong Hyuk LEE, Jung Hwan KIM, Soo Min PARK, In Haeng CHO, Dong Wook HA
  • Publication number: 20230361291
    Abstract: A cathode active material for a lithium secondary battery according to an embodiment of the present invention includes a lithium-transition metal oxide particle. The lithium-transition metal oxide particle has a FWHM ratio measured by an in-situ X-ray Diffraction spectroscopy (XRD) and defined by Equation 1 of 400% or less. Life-span properties of a lithium secondary battery can be improved by preventing deformation of a lattice structure and/or a crystal structure in the lithium-transition metal composite oxide particles.
    Type: Application
    Filed: April 25, 2023
    Publication date: November 9, 2023
    Inventors: Ji Yae DO, Jeong Bae YOON, Min Suk KANG, Hee Jun KWEON, Sang Bok KIM, Yong Hyun CHO, Dong Wook HA
  • Publication number: 20230299284
    Abstract: A cathode composition for a lithium secondary battery includes a cathode active material including cathode active material particles having a single particle shape, flake graphite, and a conductive material including an amorphous carbon-based conductive material.
    Type: Application
    Filed: March 13, 2023
    Publication date: September 21, 2023
    Inventors: Jong Hyuk LEE, Sang Han LEE, Jung Hwan KIM, In Haeng CHO, Dong Wook HA
  • Publication number: 20230223530
    Abstract: A lithium secondary battery includes a cathode including a cathode current collector and a cathode active material layer disposed on at least one surface of the cathode current collector, the cathode active material layer including a cathode active material including first cathode active material particles, each of which has a single particle shape; an anode facing the cathode; and a non-aqueous electrolyte including a non-aqueous organic solvent that contains a fluorine-based organic solvent, a lithium salt and an additive.
    Type: Application
    Filed: January 4, 2023
    Publication date: July 13, 2023
    Inventors: In Haeng CHO, Jung Hwan Kim, Sang Han Lee, Jong Hyuk Lee, Dong Wook Ha
  • Publication number: 20230223531
    Abstract: A cathode for a lithium secondary battery according to embodiments of the present invention includes a cathode current collector, and a cathode active material layer formed on the cathode current collector. The cathode active material layer includes first lithium metal oxide particles each having a secondary particle shape in which primary particles are aggregated and second lithium metal oxide particles each having a single particle shape. A cross-section of the cathode active material layer from an SEM satisfies Equations 1 and 2.
    Type: Application
    Filed: January 6, 2023
    Publication date: July 13, 2023
    Inventors: Jung Hwan KIM, Dong Wook HA, Soo Min Park, Sang Han Lee, Jong Hyuk Lee, In Haeng Cho
  • Publication number: 20230207793
    Abstract: Provided is a negative electrode for a secondary battery satisfying the following Relation 1: [Relation 1] (V1?V2)/V1*100?45% wherein V1 is a volume fraction (vol %) of silicon-based active material particles having a gray scale value of 30,000 or more in an XRM measurement on a negative electrode in a fully discharged state after formation, and V2 is a volume fraction (vol %) of silicon-based active material particles having a gray scale value of 30,000 or more in an XRM measurement on a negative electrode in a fully charged state after 500 cycles of charging and discharging.
    Type: Application
    Filed: December 8, 2022
    Publication date: June 29, 2023
    Inventors: Ju Ho CHUNG, Jeong Hoon JEUN, Gwi Ok PARK, Eun Jun PARK, Dong Wook HA
  • Publication number: 20230178726
    Abstract: A cathode active material precursor for a lithium secondary battery has a structure of a nickel composite hydroxide. A first peak intensity ratio represented by Equation 1 is 0.5 or more, and a second peak intensity ratio represented by Equation 2 is 0.7 or more. A cathode active material and a lithium secondary battery having a stabilized crystal structure are provided using the cathode active material precursor.
    Type: Application
    Filed: December 2, 2022
    Publication date: June 8, 2023
    Inventors: Mi Jung NOH, Jeong Bae YOON, Je Nam CHOI, Sang Bok KIM, Jae Ho CHOI, Dong Wook HA
  • Publication number: 20230178718
    Abstract: An anode active material for a lithium secondary battery is provided which includes a composite including: a silicon-based material including a lithium silicate; and a lithium-containing phosphate, wherein a peak intensity ratio B/A is 0.01 to 0.5, wherein A is a peak intensity at 2?=28.5°, and B is a peak intensity at 2?=22.3°, when an X-ray diffraction (XRD) analysis is performed using a Cu—K? ray.
    Type: Application
    Filed: November 30, 2022
    Publication date: June 8, 2023
    Inventors: Eun Jun PARK, Sang Hye SHIN, Joon Hyung MOON, Myoung Lae KIM, Dong Wook HA
  • Publication number: 20230048057
    Abstract: In a method of recovering an active metal of a lithium secondary battery, a cathode active material mixture is prepared from a waste cathode of a lithium secondary. The cathode active material mixture is reacted with a reductive reaction gas to form a preliminary precursor mixture having a reduction degree of transition metal defined by Equation 1 in a range from 0.24 to 1.6. A lithium precursor is recovered from the preliminary precursor mixture. A lithium recovery rationis improved by adjusting the reduction degree of transition metal.
    Type: Application
    Filed: January 25, 2021
    Publication date: February 16, 2023
    Inventors: Suk Joon HONG, Hyeon Jung KIM, Sung Real SON, Dong Wook HA, Ji Min KIM, Ji Yun PARK
  • Publication number: 20220352571
    Abstract: In a recovery method for a lithium precursor according to embodiments of the present invention, a cathode active material mixture including a lithium composite oxide is prepared. The cathode active material mixture is reacted with a carbon-based solid material in an atmosphere of an inert gas to form a preliminary precursor mixture containing lithium oxide. A washing treatment of the preliminary precursor mixture is performed to separate a lithium precursor. The lithium precursor can be recovered with high yield and high efficiency.
    Type: Application
    Filed: September 18, 2020
    Publication date: November 3, 2022
    Inventors: Suk Joon HONG, Ji Min KIM, Sung Real SON, Dong Wook HA
  • 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
  • Publication number: 20220216469
    Abstract: A cathode active material for a lithium secondary battery is provided. According to embodiments of the present invention, the cathode active material includes a lithium-transition metal composite oxide particle including a plurality of primary particles. The lithium-transition metal composite oxide particle has a lithium-boron-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by removing residual lithium.
    Type: Application
    Filed: January 6, 2022
    Publication date: July 7, 2022
    Inventors: Sang Bok Kim, Tae Kyoung Lee, Mi Jung Noh, Ji Hoon Choi, Dong Wook Ha
  • Publication number: 20210098787
    Abstract: A cathode active material precursor according to embodiments of the present invention includes nickel (Ni) and cobalt (Co) and includes an excess amount of Ni. A101/A001 is 1 or more and I101/I001 is 1 or more. A101 is a peak area of (101) plane, and A001 is a peak area of (001) plane by an X-ray diffraction (XRD) analysis, and I101 is a peak intensity of (101) plane, and I001 is a peak intensity of (001) plane by the XRD analysis. A cathode and a lithium secondary battery having improved crystallinity and long-term stability using the cathode active material precursor.
    Type: Application
    Filed: March 28, 2019
    Publication date: April 1, 2021
    Inventors: Mi Jung NOH, Jik Soo KIM, Sang Bok KIM, Dong Wook HA
  • Publication number: 20210074996
    Abstract: In a method of manufacturing a cathode active material for a lithium secondary battery, a preliminary lithium metal oxide particle is prepared. The preliminary lithium metal oxide particle is cleaned using a boron compound cleaning solution. A cathode active material for a lithium secondary particle includes a lithium metal oxide particle where a ratio of a B+ peak intensity relative to a sum of peak intensities of Li+, B+ and LiB+ fragments by a TOF-SIMS analysis is in a range from 0.03% to 1.5%.
    Type: Application
    Filed: September 8, 2020
    Publication date: March 11, 2021
    Inventors: Sang Bok Kim, Ji Hoon Choi, Jik Soo Kim, Mi Jung Noh, Dong Il Jang, Dong Wook Ha