Patents by Inventor Hakyoon Kim

Hakyoon 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: 20220223861
    Abstract: A positive electrode for a secondary battery in which a positive electrode mixture including a positive electrode active material is formed on at least one surface of a current collector is provided. The positive electrode includes a lithium by-product so as to satisfy the following Equation 1 based on the total weight of the positive electrode mixture. 4000 A - 2000 ? B ? ( ppm ) [ Equation ? ? 1 ] wherein in the Equation 1, A is the molar content of Ni when the total mole of transition metal contained in the positive electrode active material is 1, and B is the content of lithium by-product, when A is 0.5 or less, the minimum value of B is 6000 ppm. The positive electrode also has a harness at which cracks occur in a measuring rod of 2 pi (Ø) or more.
    Type: Application
    Filed: December 23, 2020
    Publication date: July 14, 2022
    Applicant: LG Energy Solution, Ltd.
    Inventors: Hakyoon Kim, Gi Beom Han, Sang Wook Lee, Sora Baek, Jungmin Han, Wang Mo Jung
  • Publication number: 20220149367
    Abstract: The present disclosure provides a positive electrode active material for a secondary battery, comprising: a lithium nickel-based oxide doped with a doping element (M?), wherein the doping element (M?) is at least one selected from the group consisting of titanium (Ti) and magnesium (Mg), wherein when the doping element (M?) is Ti, the doping content of Ti is 3000 ppm to 5000 ppm based on the total amount of the lithium nickel-based oxide excluding the doping element, wherein when the doping element (M?) is Mg, the doping content of Mg is 500 ppm to 5000 ppm based on the total amount of the lithium nickel-based oxide excluding the doping element, and wherein when the doping element (M?) is Ti and Mg, the total doping content of Ti and Mg is 3500 ppm to 5000 ppm based on the total amount of the lithium nickel oxide excluding the doping elements.
    Type: Application
    Filed: September 22, 2020
    Publication date: May 12, 2022
    Applicant: LG Energy Solution, Ltd.
    Inventors: Jungmin Han, Gi Beom Han, Sang Wook Lee, Hakyoon Kim, Sora Baek, Wang Mo Jung
  • Publication number: 20210265614
    Abstract: The present disclosure relates to a method for preparing a positive electrode additive for a lithium secondary battery having a high irreversible capacity and being capable of preventing gelation and reducing gas generation, and a positive electrode additive prepared thereby. The method for preparing the positive electrode additive includes the steps of: mixing a lithium raw material, a nickel raw material and, optionally, a raw material containing an element M, and then heat-treating the mixture, thereby preparing a predetermined lithium nickel oxide, wherein the lithium raw material includes Li2O and LiOH, and the LiOH is used in an amount of 5 to 10% by weight with respect to the total weight of the lithium raw material.
    Type: Application
    Filed: October 15, 2019
    Publication date: August 26, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Boram Lee, Sin Young Park, Daejin Lee, Hakyoon Kim, Taegon Kim, Wang Mo Jung
  • Patent number: 8876135
    Abstract: There is disclosed a combined-drive bicycle which can increase a driving speed and the beneficial effects of exercise and simultaneously to give fun to a rider. The combined-drive bicycle includes a handle assembly configured to steer a front wheel, the handle assembly comprising a crank handle to generate a handle motive force and a first gear rotated by the rotation of the crank handle, a pedal assembly configured to transmit the handle motive force and a pedal motive force generated by pedals to a rear wheel selectively or simultaneously, and a motive force transmission part to transmit the handle motive force to the pedal assembly, irrelevant to the steering of the handle assembly.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: November 4, 2014
    Inventor: Hakyoon Kim
  • Publication number: 20120104723
    Abstract: There is disclosed a combined-drive bicycle which can increase a driving speed and the beneficial effects of exercise and simultaneously to give fun to a rider. The combined-drive bicycle includes a handle assembly configured to steer a front wheel, the handle assembly comprising a crank handle to generate a handle motive force and a first gear rotated by the rotation of the crank handle, a pedal assembly configured to transmit the handle motive force and a pedal motive force generated by pedals to a rear wheel selectively or simultaneously, and a motive force transmission part to transmit the handle motive force to the pedal assembly, irrelevant to the steering of the handle assembly.
    Type: Application
    Filed: July 14, 2010
    Publication date: May 3, 2012
    Inventor: Hakyoon Kim