Patents by Inventor Eun-Kyung Kim

Eun-Kyung 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: 20200075989
    Abstract: A method for manufacturing a negative electrode for a lithium secondary battery. A negative electrode for a lithium secondary battery is manufactured while forming a composite of lithium metal and a negative electrode active material through a rolling process In the case of the lithium secondary battery to which the negative electrode containing such a composite is applied, when the battery starts to operate, the negative electrode active material is pre-lithiated, and thus charging/discharging process proceeds in the state where the lithium alloy is already formed on the negative electrode, thereby showing an effect of reducing initial irreversible phases.
    Type: Application
    Filed: April 26, 2019
    Publication date: March 5, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Yoonah KANG, Eun Kyung KIM, Sangwook WOO
  • Patent number: 10581069
    Abstract: The present invention relates to a negative electrode active material having a double coating layer of a first coating layer and a second coating layer, which has an excellent output property, effectively suppresses a side reaction with an electrolyte liquid, particularly a PC-containing electrolyte liquid, and has excellent electric conductivity, a method for manufacturing the same, a negative electrode including the same, and a lithium secondary battery including the negative electrode. The negative electrode active material according to the present invention is capable of effectively preventing a side reaction with an electrolyte liquid, particularly a PC-containing electrolyte liquid, and is capable of improving electric conductivity, and as a result, enhancing a rate determining property by reducing an OCV drop of a lithium secondary battery including the negative electrode active material, and enhancing a high rate property.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: March 3, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Hyun Wook Kim, Eun Kyung Kim, Sang Wook Woo
  • Publication number: 20200067075
    Abstract: A negative electrode having a carbon-based thin film formed on at least one surface of a lithium metal layer, and a lithium secondary battery including the same. A carbon-based thin film formed on at least one surface of a lithium metal layer blocks side reactions caused by direct contact between the lithium metal layer and an electrolyte as well as increasing a specific surface area of a negative electrode, and thereby suppresses lithium dendrite formation, and by obtaining current density distribution uniformly, enhances cycle performance, reduces an overvoltage to improve electrochemical performance of a lithium secondary battery.
    Type: Application
    Filed: March 8, 2018
    Publication date: February 27, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Heewon CHOI, Eun Kyung KIM, Ki Hwan KIM, Sangwook WOO, Jeong Woo SHON, Ohbyong CHAE
  • Publication number: 20200067088
    Abstract: A negative electrode active material as well as a method of preparing a negative electrode active material which includes preparing a silicon-based compound including SiOx, wherein 0.5<x<1.3; disposing a polymer layer including a polymer compound on the silicon-based compound; disposing a metal catalyst layer on the polymer layer; heat treating the silicon-based compound on which the polymer layer and the metal catalyst layer are disposed; and removing the metal catalyst layer, wherein the polymer compound includes any one selected from the group consisting of glucose, fructose, galactose, maltose, lactose, sucrose, a phenolic resin, a naphthalene resin, a polyvinyl alcohol resin, a urethane resin, polyimide, a furan resin, a cellulose resin, an epoxy resin, a polystyrene resin, a resorcinol-based resin, a phloroglucinol-based resin, a coal-derived pitch, a petroleum-derived pitch, a tar and a mixture of two or more thereof.
    Type: Application
    Filed: November 1, 2019
    Publication date: February 27, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Dong Hyuk KIM, Eun Kyung KIM, Yong Ju LEE, Rae Hwan JO, Jung Hyun CHOI
  • Patent number: 10573892
    Abstract: The present invention relates to a negative electrode active material and a secondary battery including the same, and specifically, provides a negative electrode active material particle including a core, which includes a carbon-based active material and an oxygen functional group, and a shell, which surrounds the core and includes a silicon-based active material.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: February 25, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Jung Hyun Choi, Yong Ju Lee, Eun Kyung Kim, Hyun Chul Kim
  • Patent number: 10573925
    Abstract: The present invention relates to an electrode for a secondary battery, comprising an electrode current collector and a lithium metal layer disposed on one surface of the electrode current collector, wherein a thickness difference between the thinnest portion and the thickest portion of the lithium metal layer is 1,000 pm or less, and a method of manufacturing the same.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: February 25, 2020
    Assignee: LG CHEM, LD.
    Inventors: Oh Byong Chae, Sang Wook Woo, Hee Won Choi, Eun Kyung Kim
  • Publication number: 20200058929
    Abstract: A method of pre-lithiating an electrode for a secondary battery, the method including: a first step of bringing a lithium metal into direct contact with an electrode in an electrolyte and applying pressure to the electrode to prepare a pre-lithiated electrode; and a second step of removing the lithium metal and then applying pressure to the pre-lithiated electrode to perform a stabilization process. The electrode for the secondary battery after going through the pre-lithiation can relieve volume change of the electrode and reduce contact loss of the electrode.
    Type: Application
    Filed: July 27, 2018
    Publication date: February 20, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Oh Byong CHAE, Yoon Ah KANG, Jun Hyuk SONG, Eun Kyung KIM, Sang Wook WOO
  • Patent number: 10562865
    Abstract: The present technology provides aryl or heteroaryl triazolone derivatives or pharmaceutically acceptable salts thereof, preparation processes thereof, pharmaceutical compositions comprising the same, and the use thereof. The aryl or heteroaryl triazolone derivatives or their pharmaceutically acceptable salts exhibit selective inhibitory activity on VAP-1 and therefore can be usefully applied, e.g., for the treatment and prophylaxis of nonalcoholic hepatosteatosis (NASH).
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: February 18, 2020
    Assignee: YUHAN CORPORATION
    Inventors: Tae Dong Han, Hee Jae Tak, Eun Kyung Kim, Su Bin Choi, Dong Hoon Kim, Sol Park, Eun Hye Jung, Hyun Ho Choi, Tae Wang Kim, Mi Kyeong Ju, Na Ry Ha
  • Publication number: 20200052282
    Abstract: A negative electrode for a lithium secondary battery, in which a LiF layer comprising amorphous LiF in an amount of 30 mol % or more is formed on a negative electrode active material layer comprising a carbon-based active material, a lithium secondary battery comprising the same, and a preparation method thereof.
    Type: Application
    Filed: January 23, 2018
    Publication date: February 13, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Oh Byong CHAE, Eun Kyung KIM, Dong Sub JUNG, Sang Wook WOO, Ju Ho CHUNG, Hee Won CHOI
  • Publication number: 20200052293
    Abstract: A method for patterning a lithium metal surface, including the steps of (S1) forming an intaglio or relief pattern having a predetermined size on a patterning substrate; (S2) either (a) compressing lithium metal physically to a surface of the patterning substrate having the pattern formed thereon to form the predetermined pattern on the surface of the lithium metal, or (b) applying liquid lithium to the surface of the patterning substrate having the pattern formed thereon and solidifying the liquid lithium to form the predetermined pattern on the surface of the lithium metal; and (S3) separating the lithium metal having the predetermined pattern formed thereon from the patterning substrate, wherein the patterning substrate is at least one selected from a silicon wafer or polycarbonate substrate.
    Type: Application
    Filed: August 17, 2018
    Publication date: February 13, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Yoon-Ah KANG, Eun-Kyung KIM, Sang-Wook WOO, Oh-Byong CHAE, Soo-Hee KANG, Geun-Sik JO, So-Young CHOO
  • Publication number: 20200036193
    Abstract: The present disclosure discloses a quick battery charging system including a lithium secondary battery having a negative electrode porosity of 25 to 35% and a negative electrode loading amount of x0. The system includes a storage unit which stores a lookup table for mapping first coefficient information of an upper bound condition associated with a C-rate of a charge current represented by a quadratic function and information associated with the negative electrode loading amount (x0). The system includes a charging control apparatus which reads the information associated with the negative electrode loading amount (x0) from the storage unit, determines the first coefficient information of the quadratic function representing the upper bound condition from the lookup table, determines the C-rate range of the charge current using the first coefficient information, and supplies the charge current satisfying the determined C-rate range to the lithium secondary battery.
    Type: Application
    Filed: August 28, 2018
    Publication date: January 30, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Jun-Hyuk SONG, Eun-Kyung KIM, Joo-Sung LEE
  • Patent number: 10511048
    Abstract: The present invention relates to a method of preparing a negative electrode active material for a secondary battery which may prevent oxidation during the preparation of nano-sized silicon particles, a negative electrode active material for a secondary battery prepared thereby, and a negative electrode for a secondary battery and a lithium secondary battery including the same.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: December 17, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Rae Hwan Jo, Yong Ju Lee, Eun Kyung Kim
  • Publication number: 20190372118
    Abstract: A method of pre-lithiating a negative electrode for a secondary battery, including: dispersing a lithium metal powder, an inorganic material powder and a binder in a solvent to prepare a mixed solution; and applying the mixed solution to the negative electrode to form a lithium metal-inorganic composite layer on the negative electrode, thereby forming the pre-lithiated negative electrode. Also, a method for pre-lithiating a negative electrode having a high capacity by a simple process. Further, a negative electrode for a secondary battery manufactured through the pre-lithiation method provided in the present invention has an improved initial irreversibility, and secondary batteries manufactured using such a negative electrode for a secondary battery have excellent charge/discharge efficiency.
    Type: Application
    Filed: August 15, 2019
    Publication date: December 5, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Sang Wook WOO, Eun Kyung KIM, Yoon Ah KANG, Jun Hyuk SONG, Oh Byong CHAE
  • Publication number: 20190372096
    Abstract: A negative electrode for a lithium secondary battery, which includes a negative electrode active material layer formed on a negative electrode collector, and a coating layer formed on the negative electrode active material layer and which includes lithium metal and metal oxide, a lithium secondary battery including the same, and a method of preparing the negative electrode.
    Type: Application
    Filed: April 17, 2018
    Publication date: December 5, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Oh Byong CHAE, Yoon Ah KANG, Jun Hyuk SONG, Eun Kyung KIM, Sang Wook WOO
  • Patent number: 10497934
    Abstract: A negative electrode active material for a secondary battery is provided. The negative electrode active material is composed of a composite including a metal element-doped inorganic particle or inorganic oxide particle, and a polymer coating layer coated on the metal element-doped inorganic particle or inorganic oxide particle, wherein the metal element is included in an amount of 0.01 to 20 parts by weight based on 100 parts by weight of the inorganic particle or inorganic oxide particle. Also provided are a method for preparing the negative electrode active material and a secondary battery having enhanced lifetime and high-efficiency charge/discharge properties by including the negative electrode active material.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: December 3, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Su Jin Park, Yong Ju Lee, Eun Kyung Kim
  • Patent number: 10490821
    Abstract: Provided is an electrode for a lithium secondary battery in which a hygroscopic material is disposed in pores which are formed by arranging an active material in an active material layer, wherein, since the electrode for a lithium secondary battery according to the present invention may remove moisture present in the electrode and an electrolyte solution by disposing the hygroscopic material in the pores which are formed by the active material in the active material layer, a side reaction due to the presence of moisture in the battery may be excluded, and thus, the performance of the battery may be improved.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: November 26, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Oh Byong Chae, Yoon Ah Kang, Eun Kyung Kim, Sun Young Shin
  • Patent number: 10476109
    Abstract: The present invention relates to a negative electrode active material and a method of preparing the same, the negative electrode active material which includes a core including artificial graphite and hard carbon, and a shell surrounding the core and including natural graphite, wherein the shell is shell is formed to cover a surface of the core by stacking and heading the natural graphite. Since the natural graphite completely surrounds the artificial graphite and the hard carbon, the hard carbon having a low initial efficiency and high electrolyte solution consumption is not exposed to the outside, and thus, high initial efficiency and life characteristics may be obtained. Also, since the natural graphite, the artificial graphite, and the hard carbon are all used, diffusion resistance of lithium ions is lower than that of a case where the natural graphite is only used, and thus, high output characteristics may be achieved.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: November 12, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Hyun Wook Kim, Eun Kyung Kim, Sun Young Shin
  • Publication number: 20190328685
    Abstract: The present invention relates to a biguanide derivative compound capable of effectively preventing and treating immune diseases. The biguanide-based derivative compound according to the present invention inhibits the generation of IL-17 and TNF-?, which are inflammatory cytokines, increases the activity of regulatory T cells having an immunomodulatory function, and exhibits excellent therapeutic effects in animal models of immune diseases. Accordingly, the biguanide-based derivative compound can be usefully used as an immunosuppressant or a pharmaceutical composition capable of preventing or treating various immune diseases, such as autoimmune diseases, inflammatory diseases, and transplant rejection, caused by the dysregulation of immune responses.
    Type: Application
    Filed: June 19, 2019
    Publication date: October 31, 2019
    Applicant: THE CATHOLIC UNIVERSITY OF KOREA INDUSTRY-ACADEMIC COOPERATION FOUNDATION
    Inventors: Mi-La Cho, Chul-Woo Yang, Dong-Yun Shin, Min-Jung Park, Seon-Yeong Lee, Sung-Hee Lee, Eun-Ji Yang, Hye-Jin Son, Eun-Kyung Kim, Jae-Kyung Kim
  • Publication number: 20190322655
    Abstract: The present technology provides triazolone derivatives or pharmaceutically acceptable salts thereof, preparation processes thereof, pharmaceutical compositions comprising the same, and the use thereof. The triazolone derivatives or their pharmaceutically acceptable salts exhibit selective inhibitory activity on VAP-1 and therefore can be usefully applied, e.g., for the treatment and prophylaxis of nonalcoholic hepatosteatosis (NASH).
    Type: Application
    Filed: March 20, 2019
    Publication date: October 24, 2019
    Applicant: YUHAN CORPORATION
    Inventors: Tae Dong HAN, Hee Jae TAK, Eun Kyung KIM, Su Bin CHOI, Sol PARK, Dong Hoon KIM, So Young KIM, Hyun Ho CHOI, Tae Wang KIM, Mi Kyeong JU, Na Ry HA, Eui Chul LEE
  • Publication number: 20190308944
    Abstract: The present technology provides aryl or heteroaryl triazolone derivatives or pharmaceutically acceptable salts thereof, preparation processes thereof, pharmaceutical compositions comprising the same, and the use thereof. The aryl or heteroaryl triazolone derivatives or their pharmaceutically acceptable salts exhibit selective inhibitory activity on VAP-1 and therefore can be usefully applied, e.g., for the treatment and prophylaxis of nonalcoholic hepatosteatosis (NASH).
    Type: Application
    Filed: March 20, 2019
    Publication date: October 10, 2019
    Applicant: YUHAN CORPORATION
    Inventors: Tae Dong HAN, Hee Jae TAK, Eun Kyung KIM, Su Bin CHOI, Dong Hoon KIM, Sol PARK, Eun Hye JUNG, Hyun Ho CHOI, Tae Wang KIM, Mi Kyeong JU, Na Ry HA