Patents by Inventor Jun-Hyuk Song

Jun-Hyuk Song 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: 20210234161
    Abstract: A negative electrode active material including a core including silicon, and a coating layer disposed on the core and including a coating material, wherein the coating material includes at least one selected from the group consisting of LiaVbO2 and MgH2, wherein 0.5<a<1.5 and 0.5<b<1.5 is provided.
    Type: Application
    Filed: May 9, 2019
    Publication date: July 29, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Jun Hyuk SONG, Oh Byong CHAE, Je Young KIM, Yong Ju LEE
  • Publication number: 20210218029
    Abstract: A negative electrode and a secondary battery including the same are described, the negative electrode including a current collector and a negative electrode active material layer disposed on the current collector, wherein the negative electrode active material layer includes a negative electrode active material including SiOx (0?x<2) particles, a conductive material, and a binder, and the negative electrode active material layer includes a lower layer in contact with the current collector, an upper layer positioned on the lower layer, and an intermediate layer positioned between the lower layer and the upper layer.
    Type: Application
    Filed: May 9, 2019
    Publication date: July 15, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Jun Hyuk SONG, Je Young KIM, Joo Sung LEE, Suk In NOH, Hee Won LEE
  • Patent number: 11063261
    Abstract: Provided are an electrode capable of maintaining electrical conductivity during elongation and shrinkage, a method for manufacturing the same, and electrochemical device including the same.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: July 13, 2021
    Assignees: UNIST(ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY), POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Soo Jin Park, Woo Jin Song, So Hyeon Bae, Un Yong Jeong, Jun Hyuk Song
  • Patent number: 11056901
    Abstract: A method of charging a secondary battery, including first, second and third charging sections in which a CC-charging performed as first, second, and third Crate (C1, C2, C3), respectively, is supplied until the voltage of the secondary battery reaches a respective first, second and third charging cutoff voltage (V1), (V2), (V3) and a CV-charging is performed as the respective charging C-rate gradually decreases in response to reaching the respective charging cutoff voltage (V1), (V2), (V3), wherein the charging cutoff voltage satisfies the V1=n?(0.25˜0.15), V2 n?(0.2˜0.1), and V3=n (here, ‘n’ is an electric potential at the full charge of the secondary battery), and V1<V2<V3.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: July 6, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Jun Hyuk Song, Joo Sung Lee
  • Publication number: 20210135274
    Abstract: A pre-lithiation apparatus that pre-lithiates a negative electrode structure having a first surface on which a negative electrode is disposed to produce a negative electrode unit of a battery, the apparatus includes a first roll rotatable to wind or unwind the negative electrode structure before the pre-lithiation is performed, a second roll installed to be spaced apart from the first roll and rotatable to wind and collect the negative electrode structure, on which the pre-lithiation is performed, and a lithium roll crossing a direction in which the negative electrode structure is transferred from the first roll to the second roll to come into contact with at least one of a first surface and a second surface of the negative electrode structure while being transferred from the first roll to the second roll. The lithium roll includes a lithium foil and an elastic member.
    Type: Application
    Filed: December 29, 2017
    Publication date: May 6, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Oh Byong CHAE, Yoon Ah KANG, Jun Hyuk SONG, Eun Kyung KIM, Sang Wook WOO
  • Publication number: 20210083273
    Abstract: A negative electrode for a lithium secondary battery and a lithium secondary battery including the negative electrode are disclosed. The negative electrode includes a negative electrode current collector, a first negative electrode active material layer present on the negative electrode current collector, and a second negative electrode active material layer present on the first negative electrode active material layer. The first negative electrode active material layer includes two or more kinds of first negative electrode active materials, and the second negative electrode active material layer includes a second negative electrode active material having swelling that is smaller than that of the first negative electrode active material layer. Therefore, the surface of the negative electrode does not exhibit deformation during pre-lithiation.
    Type: Application
    Filed: October 11, 2018
    Publication date: March 18, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Jun Hyuk SONG, Oh Byong CHAE, Eun Kyung KIM, Sang Wook WOO
  • Publication number: 20210017499
    Abstract: The present invention relates to a method or kit for producing cancer stem cell spheroids, and a method of screening of drugs for treating cancer cell resistance using the prepared cancer stem cell spheroid, and it can conveniently produce cancer stem cell spheroids, and the prepared cancer stem cell spheroid can be effectively utilized for screening drugs for treating cancer cell resistance.
    Type: Application
    Filed: June 26, 2020
    Publication date: January 21, 2021
    Inventors: Sang Yong JON, Jun Hyuk SONG, Daeyoup Lee, Yoomi Lee
  • Publication number: 20200411843
    Abstract: Provided is a solid state battery which solves the problems of the conventional solid state battery, and is effectively inhibited from a dimensional change caused by charging/discharging, an increase in internal resistance and degradation of charging/discharging characteristics or cycle life at a high current. The solid state battery is provided with an electrode active material layer including a negative electrode active material, a solid electrolyte and a conductive material, wherein the negative electrode active material includes a carbonaceous material and the carbonaceous material includes a plurality of pores, a porosity of 10-60 vol %, and a pore size of 100-300 nm based on the largest diameter of the pores.
    Type: Application
    Filed: October 22, 2018
    Publication date: December 31, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Jun-Hyuk Song, Eun-Kyung Kim, Sang-Wook Woo, Jung-Pil Lee
  • Publication number: 20200381688
    Abstract: Provided are a negative electrode for a lithium secondary battery having reinforced insulating properties, which comprises a negative electrode active material layer; and a ceramic separating layer formed on the negative electrode active material layer, wherein the negative electrode active material layer has an arithmetic average surface roughness (Ra) of 0.01 ?m to 0.3 ?m, and the ceramic separating layer has a thickness of 1 ?m to 30 ?m, and a lithium secondary battery comprising the same.
    Type: Application
    Filed: September 14, 2018
    Publication date: December 3, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Jun Hyuk Song, Joo Sung Lee, Eun Kyung Kim
  • Publication number: 20200381702
    Abstract: The present invention relates to a secondary battery capacity recovery method and apparatus for recovering the capacity of a secondary battery with deteriorated lifespan characteristics. The secondary battery capacity recovery method of the present invention comprises: (1) preparing a secondary battery with deteriorated lifespan characteristics; (2) heating the secondary battery with deteriorated lifespan characteristics while pressing the secondary battery with deteriorated lifespan characteristics to compress a positive electrode, negative electrode, or separator included in the secondary battery; and (3) charging/discharging the secondary battery with deteriorated lifespan characteristics, the secondary battery having been pressed and heated, and the secondary battery with deteriorated lifespan characteristics may be charged and discharged while being pressed and heated, thereby exhibiting an effect of recovering the capacity of the secondary battery with deteriorated lifespan characteristics.
    Type: Application
    Filed: February 18, 2019
    Publication date: December 3, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Jun Hyuk SONG, Je Young KIM, Joo Sung LEE, Suk In NOH, Hee Won LEE
  • Publication number: 20200303722
    Abstract: A method of preparing a negative electrode for a lithium secondary battery, which includes forming a negative electrode mixture layer including a negative electrode active material on a negative electrode current collector, disposing lithium metal powder on at least a part of the negative electrode mixture layer, pressing the negative electrode mixture layer on which the lithium metal powder is disposed, wetting the pressed negative electrode mixture layer with a first electrolyte solution, and drying the wet negative electrode mixture layer. A battery including the negative electrode of the present invention has enhanced rapid charge/discharge characteristics and enhanced lifespan characteristics.
    Type: Application
    Filed: January 25, 2019
    Publication date: September 24, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Oh Byong CHAE, Sang Wook WOO, Je Young KIM, Yoon Ah KANG, Jun Hyuk SONG
  • Publication number: 20200295358
    Abstract: The present invention relates to a negative electrode for a secondary battery which comprises a negative electrode collector, a negative electrode active material layer formed on the negative electrode collector, and a lithium metal layer, wherein an adhesive layer is disposed between the negative electrode active material layer and the lithium metal layer, and the lithium metal layer comprises lithium and metal oxide in a weight ratio of 50:50 to 99:1.
    Type: Application
    Filed: July 11, 2018
    Publication date: September 17, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Oh Byong Chae, Sang Wook Woo, Eun Kyung Kim, Yoon Ah Kang, Jun Hyuk Song
  • Publication number: 20200251728
    Abstract: A lithium secondary battery, wherein there is a pre-lithiated negative electrode such that a total irreversible capacity of a positive electrode is greater than a total irreversible capacity of the negative electrode while satisfying 150< (negative electrode discharge capacity/lithium secondary battery discharge capacity)×100<300, and a relative potential of the negative electrode with respect to lithium metal in an operating voltage range of the lithium secondary battery is in a range of ?0.1 V to 0.7 V. Such a lithium secondary battery is capable of maintaining a capacity retention of 60% or more even after 500 cycles or more while achieving an energy density per volume of 800 Wh/L or more.
    Type: Application
    Filed: April 17, 2020
    Publication date: August 6, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Jun Hyuk SONG, Eun Kyung KIM, Yong Ju LEE, Sang Wook WOO, Ju Ho CHUNG, Suk In NOH
  • Publication number: 20200235419
    Abstract: A lithium secondary battery including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, wherein the negative electrode is lithiated by pre-lithiation, a total capacity of a negative electrode active material of the negative electrode is larger than a total capacity of a positive electrode active material of the positive electrode, and a charge capacity of the negative electrode is smaller than a charge capacity of the positive electrode by the pre-lithiation.
    Type: Application
    Filed: July 6, 2018
    Publication date: July 23, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Oh Byong CHAE, Yoon Ah KANG, Jun Hyuk SONG, Eun Kyung KIM, Sang Wook WOO
  • Publication number: 20200220156
    Abstract: A negative electrode including: a negative electrode current collector; and a negative electrode active material layer on at least one surface of the negative electrode current collector. The negative electrode is pre-lithiated and the negative electrode active material layer includes a silicon-based material and a carbonaceous material. In addition, a graphene sheet having 2 layers to 15 layers is on the negative electrode active material layer. The negative electrode is advantageous in terms of storage and safety. A lithium secondary battery using the negative electrode shows reduced initial irreversibility, and thus provides increased efficiency.
    Type: Application
    Filed: December 20, 2018
    Publication date: July 9, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Sun-Young SHIN, Jun-Hyuk SONG, Yong-Ju LEE, Je-Young KIM
  • Publication number: 20200191872
    Abstract: A device and method for controlling discharge, and more particularly, a device and method for controlling discharge for adjusting a final discharge voltage in accordance with a battery to extend the life of the battery.
    Type: Application
    Filed: January 23, 2018
    Publication date: June 18, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Jun Hyuk SONG, Suk In NOH, Eun Kyung KIM, Joo Sung LEE
  • Publication number: 20200136128
    Abstract: A method for pre-lithiation of a negative electrode and a negative electrode formed by the method, the method including forming a mixture of inorganic material powder and molten lithium, forming a lithium metal-inorganic material composite ribbon, rolling the ribbon into a film and bonding the lithium metal-inorganic material composite film on a surface of a negative electrode to form a lithium metal-inorganic material composite layer on the surface of the negative electrode. This method reduces the deterioration of lithium during application of a mixture slurry and a negative electrode for a secondary battery, manufactured by the method for pre-lithiation, has improved initial irreversibility, and a secondary battery manufactured using such a negative electrode has excellent charging and discharging efficiency.
    Type: Application
    Filed: August 3, 2018
    Publication date: April 30, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Sang Wook WOO, Eun Kyung KIM, Yoon Ah KANG, Jun Hyuk SONG, Oh Byong CHAE
  • Patent number: 10601026
    Abstract: The present invention relates to a method of manufacturing a negative electrode and a negative electrode manufactured using the method. According to the present invention, negative electrode samples are fabricated to have different electrode densities, and then, in a negative electrode expansion curve of each negative electrode sample according to the 1st charging, when a change in slopes of tangents to the negative electrode expansion curve at an initial state of charge (SOC) of less than 50%, at which the expansion curve increases, satisfies a particular value, a secondary battery manufactured including a negative electrode having the electrode density may exhibit excellent lifespan characteristics and excellent initial efficiency for the corresponding active material.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: March 24, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Jun Hyuk Song, Eun Kyung Kim, Ju Ho Chung
  • Publication number: 20200067085
    Abstract: A method for pre-lithiation of a negative electrode is disclosed, including the steps of: producing a lithium metal laminate which includes i) lithium metal foil; and ii) a buffer layer including carbonaceous material particles, inorganic compound particles, polymer compound particles or their combination, and coated on one surface of the lithium metal foil; producing a negative electrode including a negative electrode current collector, and a negative electrode active material layer formed on at least one surface of the negative electrode current collector; and laminating the lithium metal laminate with the negative electrode in such a manner that the buffer layer of the lithium metal laminate is in contact with the negative electrode active material layer. A lithium metal laminate used for the method is also provided. The pre-lithiation of a negative electrode that includes a buffer layer reduces the problem of rapid volumetric swelling occurring.
    Type: Application
    Filed: December 20, 2018
    Publication date: February 27, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Oh-Byong CHAE, Jun-Hyuk SONG, Yoon-Ah KANG, Je-Young KIM, Sang-Wook WOO
  • 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