Patents by Inventor Sung-Joong Kang

Sung-Joong Kang 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).

  • Patent number: 11223037
    Abstract: A method for manufacturing an anode for a cable-type secondary battery, includes forming a lithium-containing electrode layer on the outer surface of a wire-type current collector; and surrounding the outer surface of the lithium-containing electrode layer with a substrate for forming a polymer layer spirally, and pressing the outside of the substrate for forming a polymer layer to form a polymer layer on the lithium-containing electrode layer, wherein the polymer layer includes a hydrophobic polymer, an ion conductive polymer, and a binder for binding the hydrophobic polymer and the ion conductive polymer with each other. An anode obtained from the method and a cable-type secondary battery including the anode are also provided.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: January 11, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Jung-Hun Choi, Dong-Hyeon Kang, Sung-Joong Kang, Byoung-Kuk Son, In-Sung Uhm, Dong-Chan Lee, Yong-Hee Lee, Min-Chul Jang
  • Patent number: 11201357
    Abstract: A flexible secondary battery includes an electrode support; a sheet-type internal electrode wound helically outside of the electrode support; a sheet-type first solid electrolyte layer wound helically outside of the internal electrode; a sheet-type bipolar electrode wound helically outside of the first solid electrolyte layer; a sheet-type second solid electrolyte layer wound helically outside of the bipolar electrode; and a sheet-type external electrode wound helically outside of the second solid electrolyte layer, wherein each of the first and second solid electrolyte layers include an organic solid electrolyte, the internal electrode is provided with insulation coating portions at both longitudinal ends of one surface facing the first solid electrolyte layer, the external electrode is provided with insulation coating portions at both longitudinal ends of one surface facing the second solid electrolyte layer, and the bipolar electrode is provided with insulation coating portions at both longitudinal ends of
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: December 14, 2021
    Inventors: Jung-Pil Lee, In-Sung Uhm, Sung-Joong Kang, Hyo-Sik Kim
  • Publication number: 20210367263
    Abstract: A solid electrolyte membrane for a solid-state battery and a battery comprising the same is provided. The battery may comprise lithium metal as a negative electrode active material. The solid electrolyte membrane comprises an inhibiting layer, which is preferably capable of inhibiting growth of lithium dendrite, because it includes an effective amount of a dendrite growth-inhibiting material, which is capable of ionizing lithium deposited in the form of metal. Thus, when lithium metal is used as a negative electrode for a solid-state battery comprising the solid electrolyte membrane, it is possible to delay and/or inhibit growth of lithium dendrite, and thus to effectively prevent an electrical short-circuit caused by dendrite growth.
    Type: Application
    Filed: June 14, 2019
    Publication date: November 25, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Jung-Pil LEE, Sung-Joong KANG, Eun-Bee KIM, Ji-Hoon RYU, Suk-Woo LEE, Jae-Hyun LEE
  • Publication number: 20210249688
    Abstract: The present disclosure relates to an electrode for an all solid-state battery and a manufacturing method thereof, and a mixture of a polymer-based solid electrolyte and a conductive material is filled between electrode active material particles that constitute an electrode active material layer, to increase the contact between the electrode active material particles and the conductive material through a solvent annealing process included in a manufacturing process, thereby improving ionic conductivity in the electrode and capacity in the electrode.
    Type: Application
    Filed: September 27, 2019
    Publication date: August 12, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Jung-Pil Lee, Eun-Bee Kim, Ji-Hoon Ryu, Sung-Joong Kang
  • Publication number: 20210242446
    Abstract: The present disclosure relates to an electrode assembly for an all-solid-state battery with improved safety, and more particularly, to an electrode assembly of a new structure designed to prevent the damage of a solid electrolyte layer caused by a step formed in a negative electrode layer due to changes in thickness of the negative electrode layer, such as an increase or decrease in thickness at part of the negative electrode layer, during charging/discharging. The electrode assembly is characterized by comprising a protective layer having an opening, interposed between the negative electrode and the solid electrolyte layer.
    Type: Application
    Filed: August 20, 2019
    Publication date: August 5, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Guilong JIN, Sung-Joong KANG, Eun-Bee KIM, Ji-Hoon RYU, Suk-Woo LEE, Jung-Pil LEE
  • Patent number: 11069895
    Abstract: An electrode assembly for a solid state battery includes a positive electrode, a negative electrode and a solid electrolyte layer interposed between the positive electrode and the negative electrode. In addition, the binder disposed at the interface between the negative electrode and the solid electrolyte layer, the interface between the positive electrode and the solid electrolyte layer and/or at a predetermined depth from the interface is crosslinked to form a three-dimensional network. In other words, in the electrode assembly, the binder contained in the negative electrode and the solid electrolyte layer and/or the binder contained in the positive electrode and the solid electrolyte layer is crosslinked to improve the interfacial binding force between the negative electrode and the solid electrolyte layer and/or between the positive electrode and the solid electrolyte layer, and thus ion conductivity is maintained to a significantly high level.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: July 20, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Sung-Ju Cho, Ho-Suk Shin, Seung-He Woo, Sung-Joong Kang, Hyea-Eun Han
  • Publication number: 20210202990
    Abstract: The present disclosure relates to a solid electrolyte membrane including a polymer electrolyte material and a porous polymer sheet which form a composite with each other in such a manner that the pores of the porous polymer sheet filled with the polymer electrolyte material, and a method for manufacturing the same. Since the porous polymer material and the solid electrolyte material form a composite with each other, it is possible to obtain a solid electrolyte membrane having excellent strength and a small thickness of 50 ?m or less, and thus to improve the energy density of a battery.
    Type: Application
    Filed: December 6, 2019
    Publication date: July 1, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Jung-Pil LEE, Sung-Joong KANG, Eun-Bee KIM, Ji-Hoon RYU, Suk-Woo LEE
  • Publication number: 20210111393
    Abstract: A method for manufacturing an anode for a cable-type secondary battery, includes forming a lithium-containing electrode layer on the outer surface of a wire-type current collector; and surrounding the outer surface of the lithium-containing electrode layer with a substrate for forming a polymer layer spirally, and pressing the outside of the substrate for forming a polymer layer to for a polymer layer on the lithium-containing electrode layer, wherein the polymer layer includes a hydrophobic polymer, an ion conductive polymer, and a binder for binding the hydrophobic polymer and the ion conductive polymer with each other. An anode obtained from the method and a cable-type secondary battery including the anode are also provided.
    Type: Application
    Filed: August 31, 2018
    Publication date: April 15, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Jung-Hun CHOI, Dong-Hyeon KANG, Sung-Joong KANG, Byoung-Kuk SON, In-Sung UHM, Dong-Chan LEE, Yong-Hee LEE, Min-Chul JANG
  • Publication number: 20210050600
    Abstract: Disclosed are an electrode having a three-dimensional structure, the electrode including: a porous nonwoven web including a plurality of polymer fibers that form an interconnected porous network; an active material composite positioned among the polymer fibers and including active material particles and a first conductive material; and a second conductive material positioned on an outer surface of the active material composite, wherein the interconnected porous network is filled homogeneously with the active material composite and the second conductive material to form a super lattice structure, and an electrochemical device including the electrode having a three-dimensional structure.
    Type: Application
    Filed: November 8, 2018
    Publication date: February 18, 2021
    Applicants: LG Chem, Ltd., Ulsan National Institute of Science and Technology
    Inventors: In-Sung Uhm, Sang-Young Lee, Sung-Joong Kang, Jeong-A Kim, Je-Young Kim, Ju-Myung Kim, Yong-Hee Lee, Jae-Hyun Lee
  • Publication number: 20210043916
    Abstract: The present disclosure relates to an electrode for an all solid-state battery and a method for manufacturing the same. The electrode comprises an electrode active material layer, wherein the gaps between the electrode active material particles forming the electrode active material layer are filled with a mixture of a polymeric solid electrolyte and a conductive material. The method for manufacturing the electrode comprises a solvent annealing process, and the contact between the electrode active material particles and the conductive material is improved through the solvent annealing process, thereby improving ion conductivity of the electrode and capacity realization in the battery.
    Type: Application
    Filed: May 3, 2019
    Publication date: February 11, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Jung-Pil Lee, Ji-Hoon Ryu, Sung-Joong Kang, Jae-Hyun Lee
  • Publication number: 20210036378
    Abstract: A flexible secondary battery includes an electrode support; a sheet-type internal electrode wound helically outside of the electrode support; a sheet-type first solid electrolyte layer wound helically outside of the internal electrode; a sheet-type bipolar electrode wound helically outside of the first solid electrolyte layer; a sheet-type second solid electrolyte layer wound helically outside of the bipolar electrode; and a sheet-type external electrode wound helically outside of the second solid electrolyte layer, wherein each of the first and second solid electrolyte layers include an organic solid electrolyte, the internal electrode is provided with insulation coating portions at both longitudinal ends of one surface facing the first solid electrolyte layer, the external electrode is provided with insulation coating portions at both longitudinal ends of one surface facing the second solid electrolyte layer, and the bipolar electrode is provided with insulation coating portions at both longitudinal ends of
    Type: Application
    Filed: December 21, 2018
    Publication date: February 4, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Jung-Pil Lee, In-Sung Uhm, Sung-Joong Kang, Hyo-Sik Kim
  • Patent number: 10910630
    Abstract: An electrode for an all solid type battery is designed such that fibrous carbon materials serving as a conductor are densely arranged crossed into a 3-dimensional structure in the form of a mesh of a nonwoven fabric-like shape, and an inorganic solid electrolyte and electrode active material particles are impregnated and uniformly dispersed in the structure. By this structural feature, the electrode for an all solid type battery has very good electron conductivity and ionic conductivity.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: February 2, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Sung-Ju Cho, Ho-Suk Shin, Seung-He Woo, Sung-Joong Kang, Hyea-Eun Han
  • Publication number: 20210020917
    Abstract: The present disclosure relates to an electrode for an all solid-state battery and a method for manufacturing the same. The electrode comprises an electrode active material layer, wherein the gaps between the electrode active material particles forming the electrode active material layer are filled with a mixture of a polymeric solid electrolyte, oxidation-/reduction-improving additive and a conductive material. The method for manufacturing the electrode comprises a solvent annealing process, and the dissociation degree and transportability of the oxidation-/reduction-improving additive are increased through the solvent annealing process, thereby improving the life characteristics of a battery.
    Type: Application
    Filed: May 3, 2019
    Publication date: January 21, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Jung-Pil Lee, Ji-Hee Ahn, Sung-Joong Kang, Jae-Hyun Lee
  • Publication number: 20210020945
    Abstract: The present disclosure relates to an all solid-state battery cell and a method for manufacturing the same. The gaps between the electrode active material particles forming the electrode active material layer are filled with a mixture of a polymeric solid electrolyte with a conductive material, and an organic solid electrolyte membrane is interposed between the positive electrode and the negative electrode. The method comprises a solvent annealing process to improve the contact between the electrode active material particles and the conductive material and to improve the contact between the electrode active material layer and the organic solid electrolyte membrane, thereby providing an all solid-state battery cell with improved ion conductivity and capacity realization.
    Type: Application
    Filed: May 3, 2019
    Publication date: January 21, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Jung-Pil Lee, Ji-Young Kim, Ji-Hoon Ryu, Sung-Joong Kang, Jae-Hyun Lee
  • Patent number: 10784539
    Abstract: The present invention provides an electrode assembly, including two or more positive electrode plates and two or more negative electrode plates laminated with each of separators interposed therebetween, wherein both side end portions of the electrode assembly are bent together in the same direction by a curvature radius (R) satisfying the following Equation 1: S[{1/ln(x/y)}*t]=R??1 wherein t is an average thickness (mm) of the laminated electrode assembly, x is a horizontal length of the electrode assembly, and y is a vertical length of the electrode assembly, and S is a constant of 10 or more, and ln(x/y)?1.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: September 22, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Min Kyu You, Sung Joong Kang, Eun Kyung Mok, In Sung Uhm
  • Publication number: 20200287245
    Abstract: The present disclosure relates to a solid electrolyte battery including a negative electrode including: a negative electrode current collector; a first negative electrode active material layer formed on at least one surface of the negative electrode current collector and including a first negative electrode active material, a first solid electrolyte and a first electrolyte salt; and a second negative electrode active material layer formed on the first negative electrode active material layer and including a second negative electrode active material, a second solid electrolyte, a second electrolyte salt and a plasticizer having a melting point of 30-130° C., the solid electrolyte battery is activated at a temperature between the melting point of the plasticizer and 130° C., and a solid electrolyte interface (SEI) layer is formed on the surface of the second negative electrode active material.
    Type: Application
    Filed: April 10, 2019
    Publication date: September 10, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Ji-Hoon Ryu, Jung-Pil Lee, Sung-Joong Kang, Eun-Bee Kim, Ji-Young Kim, Suk-Woo Lee, Jae-Hyun Lee
  • Publication number: 20200251714
    Abstract: The present disclosure relates to a positive electrode for a solid electrolyte battery which includes: a positive electrode current collector; a first positive electrode active material layer formed on at least one surface of the positive electrode current collector and including a first positive electrode active material, a first solid electrolyte and a first electrolyte salt; and a second positive electrode active material layer formed on the first positive electrode active material layer and including a second positive electrode active material, a second solid electrolyte, a second electrolyte salt and a plasticizer, wherein the plasticizer has a melting point of 30-130° C. The present disclosure also relates to a solid electrolyte battery including the positive electrode.
    Type: Application
    Filed: April 10, 2019
    Publication date: August 6, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Ji-Hoon Ryu, Jung-Pil Lee, Sung-Joong Kang, Eun-Bee Kim, Hyo-Sik Kim, Suk-Woo Lee, Jae-Hyun Lee
  • Publication number: 20200153041
    Abstract: Provided is a composite solid electrolyte membrane for an all-solid-state secondary battery, including: a phase transformation layer containing a plasticizer and a lithium salt; a porous polymer sheet layer; and a solid polymer electrolyte layer, wherein the phase transformation layer, the porous polymer sheet layer and the solid polymer electrolyte layer are stacked successively, and the phase transformation layer is disposed in such a manner that it faces a negative electrode when manufacturing an electrode assembly. An all-solid-state secondary battery including the composite solid electrolyte membrane is also provided. The composite solid electrolyte membrane for an all-solid-state secondary battery reduces the interfacial resistance with an electrode, increases ion conductivity, and improves the safety of a battery.
    Type: Application
    Filed: March 22, 2019
    Publication date: May 14, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Ji-Hoon Ryu, Guilong Jin, Ji-Hee Ahn, Sung-Joong Kang, Jae-Hyun Lee
  • Publication number: 20200127324
    Abstract: Provided is provided a lithium metal battery which includes a composite solid electrolyte membrane interposed between a lithium metal negative electrode and a positive electrode, wherein the composite solid electrolyte membrane includes: a phase transformation layer containing a plasticizer and a lithium salt; a porous polymer sheet layer; and a solid polymer electrolyte layer, the phase transformation layer, the porous polymer sheet layer and the solid polymer electrolyte layer stacked successively, and the phase transformation layer is disposed in such a manner that it faces the lithium metal negative electrode. The lithium metal battery shows reduced resistance at the interface with an electrode and increased ion conductivity, has improved safety, and provides improved energy density of an electrode.
    Type: Application
    Filed: March 22, 2019
    Publication date: April 23, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Ji-Hoon Ryu, Guilong Jin, Sung-Joong Kang, Jae-Hyun Lee
  • Publication number: 20200006779
    Abstract: A lithium metal electrode includes a current collector having a surface irregularity structure, a lithium metal layer disposed outside of the surface irregularity structure except the uppermost surface of the surface irregularity structure in the current collector, an electron-insulating protective layer disposed outside of the lithium metal layer, and a lithium ion-isolating layer disposed (1) on the uppermost surface of the surface irregularity structure of the current collector, or (2) on the uppermost surface of the surface irregularity structure of the current collector, on the uppermost surface of the lithium metal layer, and on the uppermost surface of the electron-insulating protective layer, wherein the electron-insulating protective layer includes a non-porous layer transporting lithium ions and having no pores, and a polymer porous layer disposed outside thereof. A lithium secondary battery and flexible secondary battery including the lithium metal electrode are also provided.
    Type: Application
    Filed: September 12, 2019
    Publication date: January 2, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Yong-Hee Lee, Dong-Hyeon Kang, In-Sung Uhm, Sung-Joong Kang, Min-Chul Jang, Byoung-Kuk Son, Dong-Chan Lee