Patents by Inventor Doo-kyung Yang

Doo-kyung Yang 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).

  • Lithium sulfur battery
    Patent number: 10468650
    Abstract: The present disclosure relates to a lithium sulfur battery, and the battery includes a cathode and an anode arranged facing each other; a separator interposed between the cathode and the anode; and an electrolyte, and further includes at least one or more membranes of a lithium ion conductive polymer membrane positioned between the cathode and the separator and having a sulfonic acid group (—SO3H), and a metal oxide membrane positioned between the anode and the separator, and therefore, an electrode active material loss is reduced, an improved lifespan characteristic is obtained by blocking the spread of lithium polysulfide to the anode, and in addition thereto, enhanced safety is obtained by suppressing a dendrite growth in the anode.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: November 5, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Chang Hun Park, Min Chul Jang, Doo Kyung Yang, Byong Kuk Son, Jung Hun Choi, Taek Gyoung Kim, Myeong Hun Song
  • LITHIUM ELECTRODE AND LITHIUM SECONDARY BATTERY COMPRISING SAME
    Publication number: 20190319272
    Abstract: A lithium electrode and a lithium secondary battery including the same, and in particular, to a lithium electrode including a lithium metal layer; and a surface treatment layer formed on the lithium metal layer, wherein the surface treatment layer includes a surface treatment compound including a functional group capable of bonding with lithium metal and a hydrocarbon group substituted with one or more fluorine. By being provided with a surface treatment layer including a specific functional group, the lithium electrode improves stability of lithium metal as well as suppressing side reactions on the surface, and thereby allows high capacity, high stability and long lifetime of a lithium secondary battery.
    Type: Application
    Filed: March 13, 2018
    Publication date: October 17, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Kihyun KIM, Doo Kyung YANG, Taek Gyoung KIM, Jieun SONG
  • Lithium sulfur battery and method for producing same
    Patent number: 10446874
    Abstract: The present disclosure relates to a lithium sulfur battery comprising a negative electrode and a positive electrode disposed opposite to each other, a separator positioned between the negative electrode and the positive electrode, and a gel polymer electrolyte positioned between the separator and the positive electrode, wherein the gel polymer electrolyte comprises LiNO3. The present disclosure relates to a lithium sulfur battery preventing degeneration caused by a shuttle effect, and the lithium sulfur battery comprises a gel polymer electrolyte configured to inhibit a transfer of a polysulfide-based material to a negative electrode so as to prevent a loss of the polysulfide formed on a positive electrode surface during charge and discharge reactions, whereby, lifespan characteristics of the lithium sulfur battery are capable of being enhanced.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: October 15, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Dong Wook Koh, Eun Kyung Park, Jong Hyun Chae, Doo Kyung Yang, Ki Young Kwon
  • Electrode for lithium secondary battery, method for preparing same, electrode assembly for lithium secondary battery comprising same, and lithium secondary battery comprising same
    Patent number: 10418633
    Abstract: The present invention relates to an electrode for a lithium secondary battery, a method for preparing the same, an electrode assembly for a lithium secondary battery comprising the same, and a lithium secondary battery comprising the same, wherein the electrode comprises an electrode active material, an aqueous binder, a compound represented by Formula 1, and a compound represented by Formula 2. Formula 1 and Formula 2 are the same as set forth in the specification. The electrode for a lithium secondary battery improves the physical properties of the aqueous binder in a manner whereby a cross-linking reaction material is combined with the aqueous binder, so that the electrode can improve initial charge/discharge efficiency and the life span of a lithium secondary battery, preferably a lithium sulfur battery, and improve the area capacity of the electrode.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: September 17, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Charles Kiseok Song, Byoung Hyo Jung, Seong Eun Park, Doo Kyung Yang, Ki Young Kwon
  • CATHODE ACTIVE MATERIAL FOR LITHIUM-SULFUR BATTERY, COMPRISING METAL SULFIDE NANOPARTICLES, AND METHOD FOR PRODUCING SAME
    Publication number: 20190267625
    Abstract: A positive electrode active material for a lithium-sulfur battery, and more particularly, to a positive electrode active material for a lithium-sulfur battery including metal sulfide nanoparticles and a preparation method thereof. The metal sulfide nanoparticles with large specific surface area applied to the positive electrode active material for the lithium-sulfur battery according to the present invention acts as a redox mediator during charging and discharging of the lithium-sulfur battery, thereby reducing the shuttle response by not only inhibiting the formation itself of polysulfides with elution properties, but also, even if polysulfides are eluted, adsorbing them and thus preventing them from diffusing into the electrolyte solution, and thus the capacity and life characteristics of the lithium-sulfur battery can be improved.
    Type: Application
    Filed: November 28, 2017
    Publication date: August 29, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Dongwook LEE, Jongwook JUNG, Kwonnam SOHN, Doo Kyung YANG, Gyo Hyun HWANG
  • Lithium electrode, lithium secondary battery comprising same, battery module comprising lithium secondary battery, and preparation method of lithium electrode
    Patent number: 10388962
    Abstract: The present specification relates to a lithium electrode, a lithium secondary battery including the same, a battery module including the lithium secondary battery, and a method for preparing a lithium electrode.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: August 20, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Taek Gyoung Kim, Minchul Jang, Doo Kyung Yang, Byoungkuk Son, Changhun Park, Junghun Choi, Myeonghun Song
  • SULFUR-CARBON COMPOSITE AND LITHIUM-SULFUR BATTERY COMPRISING SAME
    Publication number: 20190245203
    Abstract: A sulfur-carbon composite and a lithium-sulfur battery including the same, and in particular, to a sulfur-carbon composite comprising a porous carbon material; and sulfur on at least a part of an inside and outside surface of the porous carbon material, wherein the inside and outside surface of the porous carbon material include a coating layer comprising an ion conducting polymer, and a lithium-sulfur battery including the same. Also provided is an ion conducting polymer coating layer on a porous carbon material surface which thereby improves a lithium ion conducting property to a positive electrode, and as a result, may enhance capacity and life time properties of a lithium-sulfur battery.
    Type: Application
    Filed: October 16, 2017
    Publication date: August 8, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Eunkyung CHO, Doo Kyung YANG, Dongwook KOH
  • Battery module having all-solid-state battery and cartridge
    Patent number: 10361470
    Abstract: A cartridge having a novel structure for guaranteeing stable operational performance of a secondary battery that operates at a high temperature or has improved performance at a high temperature, and a battery module including the cartridge is provided. The battery module includes at least one secondary battery; and a cartridge receiving at least a portion of the secondary battery and configured to be stacked in at least one direction, the cartridge including a heat insulating member.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: July 23, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Ki-Young Kwon, Da-Young Sung, Young-Jin Yi, Min-Chul Jang, Byoung-Hyo Jung, Ye-Hoon Im, Doo-Kyung Yang
  • Gel polymer electrolyte and electrochemical device including the same
    Patent number: 10355309
    Abstract: The present invention provides a gel polymer electrolyte obtained by polymerizing and gelling a composition for a gel polymer including an organic solvent, an electrolyte salt and a first polymerizable monomer, wherein the gel polymer electrolyte further comprises a compound represented by the following Formula 1 as a first additive: where R1 to R3 are independently hydrogen, an alkyl group having 1 to 5 carbon atoms, an aryl group having 5 to 7 carbon atoms, or a fluorine substituted alkyl group having 1 to 5 carbon atoms, or at least two substituents selected from R1 to R3 are coupled or connected to each other to form a cycle group having a ring atom composed of 2 to 6 carbon atoms or a heterocyclic group having a ring atom composed of 2 to 8 carbon atoms and 1 to 3 oxygen hetero atoms.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: July 16, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Kyoung Ho Ahn, Jeong Woo Oh, Yi Jin Jung, Doo Kyung Yang, Min Jung Kim
  • Non-aqueous Liquid Electrolyte and Lithium Secondary Battery Comprising the Same
    Publication number: 20190214681
    Abstract: The present invention provides a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorinated benzene-based compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode, and a separator. With the non-aqueous liquid electrolyte for a lithium secondary battery of the present invention, a solid SEI film is formed on a negative electrode when initially charging a lithium secondary battery comprising the non-aqueous liquid electrolyte, and an output property of the lithium secondary battery is improved, and an output property and stability after high temperature storage are capable of being enhanced as well.
    Type: Application
    Filed: March 11, 2019
    Publication date: July 11, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Chul Haeng Lee, Shul Kee Kim, Gwang Yeon Kim, Doo Kyung Yang
  • LITHIUM-SULFUR BATTERY
    Publication number: 20190198913
    Abstract: A lithium-sulfur battery in which a passivation film having a semi-interpenetrating polymer network (semi-IPN) structure is formed on an electrode to improve lifespan characteristics of high-loading lithium-sulfur batteries.
    Type: Application
    Filed: September 15, 2017
    Publication date: June 27, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Dongwook KOH, Doo Kyung YANG, Intae PARK
  • METHOD FOR PREPARING IRON OXIDE-HYDROXIDE (FeOOH) AND POSITIVE ELECTRODE FOR LITHIUM-SULFUR BATTERY COMPRISING IRON OXIDE-HYDROXIDE
    Publication number: 20190181449
    Abstract: A method for preparing Iron Oxide-hydroxide (FeOOH), and a positive electrode for a lithium-sulfur battery including Iron Oxide-hydroxide. In particular, the preparation of crystalline Iron Oxide-hydroxide, particularly, lepidocrocite (?-FeOOH), by controlling a reaction time and a reaction temperature, and by using the prepared high purity Iron Oxide-hydroxide in a positive electrode of a lithium-sulfur battery, may enhance discharge capacity and lifetime properties of the battery.
    Type: Application
    Filed: May 28, 2018
    Publication date: June 13, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Suenghoon HAN, Kwonnam SOHN, Doo Kyung YANG, Dongwook LEE, Jungmi MOON
  • PRETREATMENT METHOD FOR LITHIUM ELECTRODE, AND LITHIUM METAL BATTERY
    Publication number: 20190157714
    Abstract: A method for pretreating a lithium electrode, and a lithium metal battery, and in particular, a method for stabilizing a lithium electrode through pretreatment of being immersed in a composition for forming a solid electrolyte interphase, and a lithium metal battery including such a lithium electrode. Effects of decreasing interfacial resistance and enhancing Li charge and discharge efficiency are obtained when forming a solid electrolyte interphase (SEI) on a lithium electrode in advance using a pretreatment process of the lithium electrode, and then using the SEI layer-formed lithium electrode in a lithium metal battery.
    Type: Application
    Filed: November 20, 2017
    Publication date: May 23, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Jieun SONG, Doo Kyung YANG
  • Lithium secondary battery
    Patent number: 10297860
    Abstract: Provided are a lithium secondary battery including a cathode, an anode, a separator, and a gel polymer electrolyte, wherein i) the anode includes a silicon (Si)-based anode active material, ii) the gel polymer electrolyte is formed by polymerizing a composition that includes a monomer having a functional group bondable to metal ions, and iii) a charge voltage of the battery is in a range of 3.0 V to 5.0 V. Since the lithium secondary battery of the present invention may prevent the movement of metal ions dissolved from a cathode to an anode or reduce the precipitation of metal on the anode, the lifetime of the battery may not only be improved but capacity characteristics of the battery may also be excellent even in the case in which the battery is charged at a high voltage as well as normal voltage.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: May 21, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Sung Hoon Yu, Yoo Sun Kang, Kyung Mi Lee, Jin Hyun Park, Jung Don Suk, Doo Kyung Yang
  • Polymer-sulfur copolymer, method for preparing same, and lithium-sulfur battery comprising same
    Patent number: 10297830
    Abstract: The present invention relates to a polymer-sulfur copolymer, a preparation method thereof, and a lithium-sulfur battery including the same. In the case of the polymer-sulfur copolymer according to the present invention, since the carrier is polymerized, there is no possibility that the carrier is eluted, and since the sulfur is covalently bonded to the polymer and uniformly distributed in a certain size in the copolymer, when used as a positive electrode active material for the lithium-sulfur battery, the problem of elution of the polysulfide can be improved. In addition, the polymer-sulfur copolymer according to the present invention has a high sulfur impregnation amount, thereby making it possible to realize a high capacity battery.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: May 21, 2019
    Assignees: LG CHEM, LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Byoung Kuk Son, Jang Wook Choi, Ali Coskun, Min Chul Jang, Doo Kyung Yang
  • Non-aqueous liquid electrolyte and lithium secondary battery comprising the same
    Patent number: 10276894
    Abstract: The present invention provides a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorinated benzene-based compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode, and a separator. With the non-aqueous liquid electrolyte for a lithium secondary battery of the present invention, a solid SEI film is formed on a negative electrode when initially charging a lithium secondary battery comprising the non-aqueous liquid electrolyte, and an output property of the lithium secondary battery is improved, and an output property and stability after high temperature storage are capable of being enhanced as well.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: April 30, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Chul Haeng Lee, Shul Kee Kim, Gwang Yeon Kim, Doo Kyung Yang
  • CARBON-SULFUR COMPLEX, METHOD FOR PRODUCING SAME, AND CATHODE AND LITHIUM-SULFUR BATTERY COMPRISING SAME
    Publication number: 20190123377
    Abstract: A carbon-sulfur composite including a carbon aggregate and sulfur, a method for preparing the same, and a positive electrode and a lithium-sulfur battery including the same.
    Type: Application
    Filed: February 28, 2018
    Publication date: April 25, 2019
    Applicants: LG CHEM, LTD., SOGANG UNIVERSITY RESEARCH FOUNDATION
    Inventors: Seungbo YANG, Eunkyung CHO, Jun Hyuk MOON, Kwonnam SOHN, Doo Kyung YANG, Donghee GUEON
  • Separator Including Laser-Induced Carbonized Graphene Layer And Lithium-Sulfur Battery Including The Same
    Publication number: 20190115580
    Abstract: Disclosed is a separator for an electrochemical device. The separator includes a non-woven web substrate, wherein at least one surface of the non-woven web substrate includes an electrode reactive layer formed by carbonization of the non-woven web substrate from the surface of the non-woven web substrate to a predetermined depth, and the electrode reactive layer is disposed at the outermost side of at least one surface of both surfaces of the separator.
    Type: Application
    Filed: November 28, 2017
    Publication date: April 18, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Taek-Gyoung KIM, Kwon-Nam SOHN, Eun-Kyu HER, Bu-Gon SHIN, Doo-Kyung YANG
  • ELECTROLYTE FOR LITHIUM-SULFUR BATTERY AND LITHIUM-SULFUR BATTERY COMPRISING SAME
    Publication number: 20190097270
    Abstract: The present invention relates to a ternary liquid electrolyte for a lithium-sulfur battery and a lithium-sulfur battery including the same. The liquid electrolyte for a lithium-sulfur battery according to the present invention exhibits an excellent sulfur utilization rate when used in a lithium-sulfur battery, and exhibits excellent stability. Accordingly, the liquid electrolyte for a lithium-sulfur battery according to the present invention is capable of enhancing a life time property while securing a capacity property of a lithium-sulfur battery.
    Type: Application
    Filed: February 14, 2017
    Publication date: March 28, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Intae PARK, Sungwon HONG, Charles Kiseok SONG, Youhwa OHK, Doo Kyung YANG, Changhoon LEE
  • ELECTROLYTE SOLUTION FOR LITHIUM-SULFUR BATTERY AND LITHIUM-SULFUR BATTERY COMPRISING SAME
    Publication number: 20190088980
    Abstract: The present invention relates to a ternary liquid electrolyte for a lithium-sulfur battery and a lithium-sulfur battery including the same. The liquid electrolyte for a lithium-sulfur battery according to the present invention exhibits an excellent sulfur utilization rate when used in a lithium-sulfur battery, and exhibits excellent stability. Accordingly, the liquid electrolyte for a lithium-sulfur battery according to the present invention is capable of enhancing a life time property while securing a capacity property of a lithium-sulfur battery.
    Type: Application
    Filed: March 10, 2017
    Publication date: March 21, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Intae PARK, Sungwon HONG, Charles Kiseok SONG, Youhwa OHK, Doo Kyung YANG, Changhoon LEE