Patents by Inventor Il Geun Oh

Il Geun Oh 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: 20200373559
    Abstract: A positive electrode includes a current collector and a positive electrode active material layer disposed on the current collector, wherein the positive electrode active material layer includes a positive electrode active material, carbon nanotube, and a binder, the binder includes polyvinylidene fluoride which has a weight average molecular weight of 720,000 g/mol to 980,000 g/mol, a BET specific surface area of the carbon nanotube is 140 m2/g to 195 m2/g, and the positive electrode satisfies the following Formula 1: 1.3?B/A?3.4??[Formula 1] in Formula 1, B is an amount (wt %) of the polyvinylidene fluoride in the positive electrode active material layer, and A is an amount (wt %) of the carbon nanotube in the positive electrode active material layer.
    Type: Application
    Filed: February 19, 2019
    Publication date: November 26, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Joo Yul Baek, Jun Muk Lim, Chang Ju Lee, Il Geun Oh, Je Young Kim, Sang Hoon Choy
  • Publication number: 20200343544
    Abstract: The present invention relates to a negative electrode active material including a spherical carbon-based particle, and a carbon layer disposed on the spherical carbon-based particle and including a nano-particle, wherein the nano-particle has a silicon core, an oxide layer disposed on the silicon core and including SiOx (0<x?2), and a coating layer covering at least a portion of the surface of the oxide layer and including LiF.
    Type: Application
    Filed: November 9, 2018
    Publication date: October 29, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Jung Hyun CHOI, Yong Ju LEE, Eun Kyung KIM, Rae Hwan JO, Su Min LEE, Dong Hyuk KIM, Se Mi PARK, Il Geun OH
  • Publication number: 20200313173
    Abstract: A negative electrode active material which includes a core including SiOx (0<x<2), a shell disposed on the core and includes lithium silicate, and a coating layer disposed on the shell and includes carbon nanotubes. Also, a method of preparing a negative electrode active material as well as a negative electrode and a battery including the same.
    Type: Application
    Filed: October 19, 2018
    Publication date: October 1, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Il Geun OH, Eun Kyung KIM, Yong Ju LEE, Rae Hwan JO, Su Min LEE, Jung Hyun CHOI, Dong Hyuk KIM, Se Mi PARK
  • Publication number: 20200280059
    Abstract: The present invention relates to a negative electrode active material which includes a carbonaceous matrix including a first particle and a second particle, wherein the first particle includes a silicon core, an oxide layer which is disposed on the silicon core and includes SiOx (0<x?2), and a coating layer which covers at least a portion of a surface of the oxide layer and includes LiF, and the second particle is flaky graphite.
    Type: Application
    Filed: August 30, 2018
    Publication date: September 3, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Jung Hyun CHOI, So Ra LEE, Eun Kyung KIM, Yong Ju LEE, Sun Young SHIN, Hyeon Min SONG, Jee Eun KIM, Seo Young KWON, Il Geun OH, Jae Young LEE
  • Publication number: 20200274147
    Abstract: A negative electrode active material for a lithium secondary battery including complex particles including silicon oxide particles doped with a metal of lithium, magnesium, calcium or aluminum, a linear conductive material disposed between the doped silicon oxide particles, and a carbon-based binder that hinds the doped silicon oxide particles and the conductive material together. The carbon-based binder is a result of sintering. a carbon-based precursor. A method of preparing the negative electrode active material, a negative electrode and a lithium secondary battery are also provided. The negative electrode active material according to the present disclosure is superior at least in initial efficiency and life characteristics.
    Type: Application
    Filed: May 3, 2019
    Publication date: August 27, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Su-Min LEE, Je-Young KIM, Il-Geun OH, Yong-Ju LEE
  • Publication number: 20200266424
    Abstract: The present invention relates to a negative electrode active material including a carbonaceous matrix having a plurality of nano-particles, wherein the nano-particles have a silicon core, an oxide layer disposed on the silicon core and including SiOx (0<x?2), and a coating layer covering at least a portion of the surface of the oxide layer and including LiF.
    Type: Application
    Filed: November 9, 2018
    Publication date: August 20, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Jung Hyun CHOI, Seung Youn CHOI, Eun Kyung KIM, Yong Ju LEE, Rae Hwan JO, Su Min LEE, Dong Hyuk KIM, Se Mi PARK, Il Geun OH
  • Publication number: 20200243836
    Abstract: The present invention relates to a method of preparing a negative electrode active material which includes forming a mixture by mixing Li2O and SiOx(0<x<2) particles including SiO2, forming a reaction product by performing a heat treatment on the mixture at 400° C. to 600° C., and removing a portion of lithium silicate in the reaction product by washing the reaction product.
    Type: Application
    Filed: October 19, 2018
    Publication date: July 30, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Il Geun OH, Eun Kyung KIM, Yong Ju LEE, Rae Hwan JO, Su Min LEE, Jung Hyun CHOI, Dong Hyuk KIM, Se Mi PARK
  • Publication number: 20200176753
    Abstract: A negative electrode for a lithium secondary battery (and a lithium secondary battery including the same) including: a negative electrode current collector; a first negative electrode mixture layer present on at least one surface of the negative electrode current collector and including a first carbonaceous negative electrode active material, a first polymer binder and a first conductive material; a second negative electrode mixture layer present on a top surface of the first negative electrode mixture layer and including a silicon-based negative electrode active material, a second polymer binder and a second conductive material; and a third negative electrode mixture layer present on a top surface of the second negative electrode mixture layer and including a second carbonaceous negative electrode active material, a third polymer binder and a third conductive material.
    Type: Application
    Filed: February 11, 2020
    Publication date: June 4, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Su-Min LEE, Yong-Ju LEE, Eun-Kyung KIM, Sun-Young SHIN, Il-Geun OH, Rae-Hwan JO
  • Publication number: 20200168890
    Abstract: A negative electrode active material which includes a secondary particle including first primary particles, wherein the first primary particle includes a core including SiOx, wherein 0?x<2, an intermediate layer which covers at least a portion of a surface of the core and includes silicon nitride, silicon oxynitride, or a mixture thereof, and a carbon coating layer which covers at least a portion of the intermediate layer and includes nitrogen-doped carbon, and a negative electrode and a lithium secondary battery which include the same.
    Type: Application
    Filed: May 10, 2018
    Publication date: May 28, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Jung Hyun CHOI, Yong Ju LEE, Dong Hyuk KIM, Eun Kyung KIM, Rae Hwan JO, Il Geun OH
  • Publication number: 20200112019
    Abstract: A negative electrode active material including a core, an intermediate layer on a surface of the core, and a shell layer on a surface of the intermediate layer, wherein the core includes a silicon oxide of SiOx (0 <x<2); the intermediate layer includes a lithium silicate, the shell layer includes lithium fluoride (LiF) and the intermediate layer is present in an amount of 5 wt %-15 wt % based on a total weight of the negative electrode active material. Also, a method for preparing the negative electrode active material, and a negative electrode and lithium secondary battery including the same. The negative electrode active material provides excellent initial efficiency and life characteristics.
    Type: Application
    Filed: December 7, 2018
    Publication date: April 9, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Il-Geun OH, Jung-Hyun CHOI, Je-Young KIM, Yong-Ju LEE
  • Publication number: 20200099052
    Abstract: A negative electrode active material including silicon-based active material particles each including a core including SiOx, wherein 0?x?2, and a coating layer present on the core. Also, a negative electrode active material in which the coating layer is any one of a carbon coating layer or a polymer coating layer, and the coating layer includes a fluorinated material including at least one of an alkali metal or an alkaline earth metal.
    Type: Application
    Filed: November 26, 2019
    Publication date: March 26, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Jung Hyun CHOI, Yong Ju LEE, Eun Kyung KIM, Rae Hwan JO, Dong Hyuk KIM, Il Geun OH
  • Publication number: 20190267614
    Abstract: The present invention relates to a method of preparing a positive electrode for a secondary battery, which includes preparing a positive electrode by forming a positive electrode active material layer including a positive electrode active material, a conductive agent, and a binder on a positive electrode collector, impregnating the positive electrode in a sacrificial salt solution including a sacrificial salt additive, and, after the impregnating of the positive electrode in the sacrificial salt solution, drying the positive electrode to fill pores of the positive electrode active material layer with the sacrificial salt additive, and a positive electrode for a secondary battery prepared thereby.
    Type: Application
    Filed: May 25, 2018
    Publication date: August 29, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Yong Ju Lee, Sun Young Shin, Se Mi Park, Il Geun Oh, Eun Kyung Kim