Patents by Inventor Woo Yeon Kong

Woo Yeon Kong 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: 20240282956
    Abstract: A lithium secondary battery includes a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material and a nonaqueous electrolyte solution, wherein the positive electrode active material has a lithium composite transition metal oxide having a nickel content of 60 mol % or more in a total transition metal in a form of secondary particles formed by agglomeration of primary particles; and a boron containing coating layer on a surface of all or some of the primary particles, the nonaqueous electrolyte solution comprises a boron dissolved in the nonaqueous electrolyte solution, and a ratio B/A of a boron content (B) in the nonaqueous electrolyte solution to a boron content (A) in the positive electrode active material is 0.001 to 5. The lithium secondary battery according to the present disclosure has improved life characteristics.
    Type: Application
    Filed: June 15, 2022
    Publication date: August 22, 2024
    Applicant: LG Energy Solution, Ltd.
    Inventors: Dong-Hun Lee, Woo-Yeon Kong, Hye-Mi Kim, Sin-Yong Park, Sang-Wook Lee, Je-Young Kim, Wang-Mo Jung
  • Patent number: 10559816
    Abstract: The present disclosure suppresses, by uniformly coating lithium transition metal composite oxide particles with LiwNbxOy (1?w?8, 1?x?13, 1?y?20), a direct contact between a positive electrode active material and a liquid electrolyte and thereby suppresses a side reaction between the positive electrode active material and the liquid electrolyte, and improves stability at high temperatures and high voltages, and in particular, is effective in enhancing battery performance by forming Li2O—Nb2O5 through reacting the coating layer with Li present on the surfaces of the lithium transition metal composite oxide particles.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: February 11, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Woo Yeon Kong, Hye Lim Jeon, Sung Bin Park, Wang Mo Jung, Seong Hoon Kang
  • Patent number: 10516186
    Abstract: The present invention provides a lithium secondary battery, including a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and a separator provided between the positive electrode and the negative electrode, wherein the negative electrode active material may include a titanium-based composite, wherein, when the lithium secondary battery is charged to SOC 50 under C-rate conditions of 0.1 to 40 C, the titanium-based composite has a ratio of the peak area of a plane (400) and the peak area of a plane (111) of 0.76 or more in a measured X-ray diffraction spectrum (XRD). Therefore, the present invention may provide a lithium secondary battery having excellent output characteristics and a battery pack in which a BMS prediction algorithm is simplified.
    Type: Grant
    Filed: November 24, 2016
    Date of Patent: December 24, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Sung Bin Park, Hye Lim Jeon, Woo Yeon Kong, Wang Mo Jung, Seong Hoon Kang
  • Patent number: 10243208
    Abstract: Disclosed are a precursor of an electrode active material for a lithium secondary battery, in which a metal material ionizable through electrolytic decomposition is uniformly coated on a surface of a primary precursor formed of a transition metal hydrate, and a method of preparing the same.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: March 26, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Dae Jin Lee, Joo Hong Jin, Woo Yeon Kong, Sun Sik Shin, Wang Mo Jung
  • Publication number: 20180198155
    Abstract: The present invention provides a lithium secondary battery, including a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and a separator provided between the positive electrode and the negative electrode, wherein the negative electrode active material may include a titanium-based composite, wherein, when the lithium secondary battery is charged to SOC 50 under C-rate conditions of 0.1 to 40 C, the titanium-based composite has a ratio of the peak area of a plane (400) and the peak area of a plane (111) of 0.76 or more in a measured X-ray diffraction spectrum (XRD). Therefore, the present invention may provide a lithium secondary battery having excellent output characteristics and a battery pack in which a BMS prediction algorithm is simplified.
    Type: Application
    Filed: November 24, 2016
    Publication date: July 12, 2018
    Applicant: LG CHEM, LTD.
    Inventors: Sung Bin PARK, Hye Lim JEON, Woo Yeon KONG, Wang Mo JUNG, Seong Hoon KANG
  • Patent number: 9972834
    Abstract: The present disclosure relates to a cathode active material for a lithium secondary battery with improved rate characteristics in which a spinel surface structure is formed by fluorine coating on a surface of layered lithium nickel-manganese-cobalt cathode active material and a method for manufacturing the same, and according to the present disclosure, there is provided a lithium secondary battery with improved rate characteristics that may be charged to a capacity close to a full charge in a short time when compared to a related art and thus is suitable for high capacity of a secondary battery.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: May 15, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Woo-Yeon Kong, Myung-Ki Lee, Min-Suk Kang, Sun-Sik Shin, Hye-Lim Jeon, Chi-Ho Jo, Geun-Gi Min, Wang-Mo Jung
  • Patent number: 9905841
    Abstract: Disclosed are a cathode active material and a lithium secondary battery including the same, and a method of manufacturing the cathode active material, the method including: (a) manufacturing a lithium metal oxide according to formula 1 below: Li1+zNiaMnbCo1?(a+b)O2??(1) wherein 0?z?0.1, 0.1?a?0.8, 0.1?b?0.8 and a+b<1; (b) dry mixing the lithium metal oxide, and a precursor including zirconium and fluorine; and (c) changing the precursor including zirconium and fluorine into ZrO2 and substituting some of oxygen (O) anions with F by heat-treatment after dry mixing of step (b), wherein the cathode active material is coated with ZrO2 and F.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: February 27, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Joo Hong Jin, Dae Jin Lee, Sun Sik Shin, Woo Yeon Kong, Wang Mo Jung
  • Publication number: 20170155132
    Abstract: The present disclosure suppresses, by uniformly coating lithium transition metal composite oxide particles with LiwNbxOy (1?w?8, 1?x?13, 1?y?20), a direct contact between a positive electrode active material and a liquid electrolyte and thereby suppresses a side reaction between the positive electrode active material and the liquid electrolyte, and improves stability at high temperatures and high voltages, and in particular, is effective in enhancing battery performance by forming Li2O—Nb2O5 through reacting the coating layer with Li present on the surfaces of the lithium transition metal composite oxide particles.
    Type: Application
    Filed: November 28, 2016
    Publication date: June 1, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Woo Yeon Kong, Hye Lim Jeon, Sung Bin Park, Wang Mo Jung, Seong Hoon Kang
  • Publication number: 20160181593
    Abstract: Disclosed are a cathode active material and a lithium secondary battery including the same, and a method of manufacturing the cathode active material, the method including: (a) manufacturing a lithium metal oxide according to formula 1 below: Li1+zNiaMnbCo1?(a+b)O2 ??(1) wherein 0?z?0.1, 0.1?a?0.8, 0.1?b?0.8 and a+b<1; (b) dry mixing the lithium metal oxide, and a precursor including zirconium and fluorine; and (c) changing the precursor including zirconium and fluorine into ZrO2 and substituting some of oxygen (O) anions with F by heat-treatment after dry mixing of step (b), wherein the cathode active material is coated with ZrO2 and F.
    Type: Application
    Filed: August 6, 2014
    Publication date: June 23, 2016
    Applicant: LG Chem, Ltd.
    Inventors: Joo Hong Jin, Dae Jin Lee, Sun Sik Shin, Woo Yeon Kong, Wang Mo Jung
  • Publication number: 20150287984
    Abstract: The present disclosure relates to a cathode active material for a lithium secondary battery with improved rate characteristics in which a spinel surface structure is formed by fluorine coating on a surface of layered lithium nickel-manganese-cobalt cathode active material and a method for manufacturing the same, and according to the present disclosure, there is provided a lithium secondary battery with improved rate characteristics that may be charged to a capacity close to a full charge in a short time when compared to a related art and thus is suitable for high capacity of a secondary battery.
    Type: Application
    Filed: June 18, 2014
    Publication date: October 8, 2015
    Applicant: LG Chem, Ltd.
    Inventors: Woo-Yeon Kong, Myung-Ki Lee, Min-Suk Kang, Sun-Sik Shin, Hye-Lim Jeon, Chi-Ho Jo, Geun-Gi Min, Wang-Mo Jung
  • Publication number: 20150280225
    Abstract: Disclosed are a precursor of an electrode active material for a lithium secondary battery, in which a metal material ionizable through electrolytic decomposition is uniformly coated on a surface of a primary precursor formed of a transition metal hydrate, and a method of preparing the same.
    Type: Application
    Filed: November 26, 2013
    Publication date: October 1, 2015
    Applicant: LG CHEM, LTD.
    Inventors: Dae Jin Lee, Joo Hong Jin, Woo Yeon Kong, Sun Sik Shin, Wang Mo Jung