Patents by Inventor Doe Hyoung KIM

Doe Hyoung KIM 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: 20240337443
    Abstract: Disclosed is a kiln having a portion with which raw materials for preparing active materials and/or the prepared active materials come into contact during firing, the portion containing a substance represented by the following Formula 1: NiaXz ??(1) wherein a and z are weight fractions satisfying 0.85?a<1 and 0<z?0.15, respectively; and X includes at least one element selected from the group consisting of Cr, Fe, Co, Mn, P, Cu, Mo, Si, Nb, Ti, W, C, Na, Al, Mg, Zn, B, Ta, O, Sn, Ag, Re, Ru and Zr, or an alloy or compound of at least two elements selected therefrom.
    Type: Application
    Filed: June 28, 2022
    Publication date: October 10, 2024
    Inventors: Sung Woo CHO, Sung Kyun CHANG, Hyuk Won KWON, Ji Woo OH, Doe Hyoung KIM, Hyeon Cheol JEONG
  • Publication number: 20240294394
    Abstract: Disclosed is a composite transition metal precursor for a cathode active material containing Ni and at least one transition metal, wherein a molar amount of Ni is 60% or more based on a total amount of transition metal and a ratio (I101/I001) of an intensity of a (101) plane to an intensity of a (001) plane ranges from 0.7 to 1.1 in XRD analysis.
    Type: Application
    Filed: September 29, 2021
    Publication date: September 5, 2024
    Inventors: Sun Hong PARK, Won Gyeong KANG, Sung Kyun CHANG, Doe Hyoung KIM
  • Publication number: 20240266519
    Abstract: Disclosed is a cathode active material including a particle core, a surface bulk portion formed in an outer direction of the particle core, and a surface portion formed in an outer direction of the surface bulk portion to constitute an outermost layer of the active material, wherein the surface portion contains a resistance-reducing element capable of reducing a resistance increase rate of the active material, and the surface bulk portion contains a structure-stabilizing element capable of improving the structural stability of the active material, and the structure-stabilizing element has higher diffusion power than that of the resistance-reducing element under calcination conditions for producing an active material.
    Type: Application
    Filed: November 5, 2021
    Publication date: August 8, 2024
    Inventors: Kyung Min KIM, Su Youn KWON, Jin Hyeon LIM, Sung Kyun CHANG, Doe Hyoung KIM
  • 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
  • Patent number: 12002956
    Abstract: Disclosed are novel precursor particles for preparing a cathode active material including transition metal precursor particles containing one or more transition metals, and one or more of an alkali metal and an alkaline earth metal, wherein the alkali metal and the alkaline earth metal are contained in one or more of inner and outer parts of the transition metal precursor particles, and a novel precursor powder including the novel precursor particles.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: June 4, 2024
    Assignee: L&F CO., LTD.
    Inventors: Sung Kyun Chang, Sang Hoon Jeon, Sunhong Park, Doe Hyoung Kim
  • Publication number: 20240063386
    Abstract: Disclosed are novel precursor particles for preparing a cathode active material including transition metal precursor particles containing one or more transition metals, and one or more of an alkali metal and an alkaline earth metal, wherein the alkali metal and the alkaline earth metal are contained in one or more of inner and outer parts of the transition metal precursor particles, and a novel precursor powder including the novel precursor particles.
    Type: Application
    Filed: October 27, 2023
    Publication date: February 22, 2024
    Inventors: Sung Kyun CHANG, Sang Hoon JEON, Sunhong PARK, 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
  • Patent number: 11888130
    Abstract: Disclosed are a secondary battery, an active material, a method for preparing the same, and a lithium secondary battery including the same. In an embodiment, provided is a secondary battery including a positive electrode, a negative electrode and an electrolyte, wherein the secondary battery further includes a reaction-inducing substance located in any one of the positive electrode, the negative electrode and the electrolyte, wherein the reaction-inducing substance forms a reaction product by consuming thermal energy when exposed to a predetermined temperature or higher in a use environment of the secondary battery, thereby improving thermal safety of the secondary battery.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: January 30, 2024
    Assignee: L&F CO., LTD.
    Inventors: Sung Kyun Chang, Sang Hoon Jeon, Jun Ho Shin, Ji Woo Oh, Hee Won Jung, Hye-Rim Bae, Chang Hyun Lee, Doe Hyoung Kim
  • Publication number: 20230110681
    Abstract: Disclosed is a coating material for coating a surface of a kiln for preparing an active material, the coating material being represented by the following Formula 1: NiaXz??(1) wherein an equation of a+z=1 is satisfied, with the proviso that 0.2?a<1.0 and 0<z?0.8 are satisfied, and X is at least one element selected from the group consisting of W, Cr, Co, Fe, Cu, Na, Al, Mg, Si, Zn, K, Ti, Mo, N, B, P, C, Ta, Nb, O, Mn, Sn, Ag and Zr, or an alloy or compound of two or more elements selected therefrom.
    Type: Application
    Filed: March 11, 2021
    Publication date: April 13, 2023
    Inventors: Jun Ho SHIN, Sung Kyun CHANG, Seung Hwan KIM, Jong Wan KIM, Ji Woo OH, Doe Hyoung KIM
  • Publication number: 20230074377
    Abstract: Disclosed is an active material for a secondary battery, the active material containing aggregates, each including a plurality of single particles, or a mixture of the aggregates with non-aggregated single particles, the active material including a first region having a relatively high content of an additional element (X) and a second region having a relatively low content of the additional element (X), wherein the first region is at least one region of a grain boundary formed whereby the surfaces of the single particles constituting the aggregate contact one another and a void (pore or gap) between the single particles, and/or a surface region of each single particle, wherein the additional element (X) includes at least one selected from the group consisting of Zr, Ti, Al, W, B, P, Mn, Ni, Mg, Cr, Ca, V, Sr, Y, F, Zn, Ga, Sn, Ru, Ce, La, and Si.
    Type: Application
    Filed: August 6, 2020
    Publication date: March 9, 2023
    Inventors: Hye Yun JUNG, Sung Kyun CHANG, Sang Hoon JEON, Sun Hye LIM, Jae Yeoung PARK, Doe Hyoung KIM
  • Publication number: 20220376239
    Abstract: Disclosed are novel precursor particles for preparing a cathode active material including transition metal precursor particles containing one or more transition metals, and one or more of an alkali metal and an alkaline earth metal, wherein the alkali metal and the alkaline earth metal are contained in one or more of inner and outer parts of the transition metal precursor particles, and a novel precursor powder including the novel precursor particles.
    Type: Application
    Filed: September 25, 2019
    Publication date: November 24, 2022
    Inventors: Sung Kyun CHANG, Sang Hoon JEON, Sunhong PARK, Doe Hyoung KIM
  • Publication number: 20220376364
    Abstract: The present invention relates to a battery pack, and more particularly, to a battery pack configured to stably assemble a plurality of secondary batteries. Provided is a battery pack including a plurality of secondary batteries (100), a holder part (200) configured to fix the plurality of secondary batteries (100) so that the plurality of secondary batteries (100) constitute a unit module, and a conductive connection part that is in contact with the plurality of secondary batteries (100) to provide electrical connection with the outside. The holder part (200) are coupled to each of both ends of a positive electrode and a negative electrode of each of the plurality of secondary batteries (100).
    Type: Application
    Filed: May 17, 2022
    Publication date: November 24, 2022
    Inventors: Doe Hyoung KIM, Sung Goo Cho, Jeong Keun Ahn
  • Publication number: 20220344658
    Abstract: Disclosed is a lithium composite metal oxide containing nickel (Ni) and titanium (Ti) as main components. The lithium composite metal oxide, which is a cathode active material for a lithium secondary battery, has high charge capacity and desirable lifespan characteristics, and realizes optimal performance of a lithium secondary battery when used in combination with an anode active material having high energy density. In particular, the lithium composite metal oxide is capable of maintaining optimal balance with the charge and discharge efficiency of the Si-based anode active material and thus enables manufacture of a high-performance lithium secondary battery.
    Type: Application
    Filed: October 1, 2019
    Publication date: October 27, 2022
    Inventors: Sang Hoon JEON, Sung Kyun CHANG, Ji Hyun SHIN, Sun Hye LIM, Doe Hyoung KIM
  • Patent number: 11394059
    Abstract: Disclosed is a secondary battery including a positive electrode, a negative electrode and an electrolyte, wherein the secondary battery further includes a reaction-inducing substance located in any one of the positive electrode, the negative electrode and the electrolyte, wherein the reaction-inducing substance forms a reaction product when exposed to a predetermined temperature or higher in a use environment of the secondary battery, wherein the reaction product is a non-conductor.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: July 19, 2022
    Assignee: L&F CO., LTD.
    Inventors: Sung Kyun Chang, Sang Hoon Jeon, Jun Ho Shin, Ji Woo Oh, Hee Won Jung, Hye-Rim Bae, Chang Hyun Lee, Doe Hyoung Kim
  • Publication number: 20200144682
    Abstract: Disclosed are a secondary battery, an active material, a method for preparing the same, and a lithium secondary battery including the same. In an embodiment, provided is a secondary battery including a positive electrode, a negative electrode and an electrolyte, wherein the secondary battery further includes a reaction-inducing substance located in any one of the positive electrode, the negative electrode and the electrolyte, wherein the reaction-inducing substance forms a reaction product by consuming thermal energy when exposed to a predetermined temperature or higher in a use environment of the secondary battery, thereby improving thermal safety of the secondary battery.
    Type: Application
    Filed: October 22, 2019
    Publication date: May 7, 2020
    Applicant: L&F Co., Ltd.
    Inventors: Sung Kyun CHANG, Sang Hoon JEON, Jun Ho SHIN, Ji Woo OH, Hee Won JUNG, Hye-Rim BAE, Chang Hyun LEE, Doe Hyoung KIM
  • Publication number: 20200144680
    Abstract: Disclosed is a secondary battery including a positive electrode, a negative electrode and an electrolyte, wherein the secondary battery further includes a reaction-inducing substance located in any one of the positive electrode, the negative electrode and the electrolyte, wherein the reaction-inducing substance forms a reaction product when exposed to a predetermined temperature or higher in a use environment of the secondary battery, wherein the reaction product is a non-conductor.
    Type: Application
    Filed: October 22, 2019
    Publication date: May 7, 2020
    Applicant: L&F Co., Ltd.
    Inventors: Sung Kyun CHANG, Sang Hoon JEON, Jun Ho SHIN, Ji Woo OH, Hee Won JUNG, Hye-Rim BAE, Chang Hyun LEE, Doe Hyoung KIM