Patents by Inventor Dong-Jo Ryu

Dong-Jo Ryu 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: 20250149587
    Abstract: A secondary battery binder composition includes: emulsion polymer particles A having a core-shell structure, which includes a core part and a shell part occupying a part or all of the surface of the core part; and emulsion polymer particles B having no core-shell structure. The binder composition satisfies 50<N(A)/N(B)<400, wherein N(A) is the number of emulsion polymer particles A having a core-shell structure, and N(B) is the number of emulsion polymer particles B having no core-shell structure.
    Type: Application
    Filed: April 12, 2023
    Publication date: May 8, 2025
    Applicant: LG Chem, Ltd.
    Inventors: Seon Hee Han, Min Ah Kang, Jung Sup Han, Dong Jo Ryu, Jungeun Woo, Cheolhoon Choi
  • Publication number: 20250115779
    Abstract: A manufacturing method of a cathode binder or a cathode insulating solution for a lithium secondary battery includes: adding a non-aqueous organic solvent to a water-dispersed conjugated diene latex, followed by heating and decompressing, to replace water, which is a dispersion solvent of conjugated diene latex particles, with a non-aqueous organic solvent. A cathode binder or a cathode insulating solution and a lithium secondary battery including the cathode binder or the cathode insulation solution prepared according to the method is also provided.
    Type: Application
    Filed: April 4, 2023
    Publication date: April 10, 2025
    Applicant: LG Chem, Ltd.
    Inventors: Min Ah Kang, Seon Hee Han, Chang Bum Ko, Dong Jo Ryu, Doyun Kim
  • Publication number: 20240421374
    Abstract: An insulation-layer forming composition includes: a conjugated diene copolymer as a binder polymer; and a non-aqueous organic solvent as a dispersion solvent, the conjugate diene copolymer having a Tg of ?10° C. to 40° C. According to one embodiment of the present disclosure, a physical short circuit between the cathode and the anode due to the defects, such as separator shrinkage and electrode folding in the lithium secondary battery, can be prevented. Moreover, cathode coating and insulating liquid coating can be simultaneously performed, by forming, on a tab portion of the cathode, an insulating layer satisfying all of flexibility, insulating characteristics, and electrolyte resistance characteristics. A cathode including the insulation-layer forming composition, a method of forming the cathode, and a lithium secondary battery including the cathode are also provided.
    Type: Application
    Filed: April 4, 2023
    Publication date: December 19, 2024
    Applicant: LG Chem, Ltd.
    Inventors: Min Ah Kang, Chang Bum Ko, Doyun Kim, Dong Jo Ryu, Jungeun Woo, Seon Hee Han
  • Patent number: 12068483
    Abstract: An electrode binder composition for a rechargeable battery includes emulsion polymer particles comprising a1) first repeat units derived from conjugated diene monomers; one or more second repeat units selected from the group consisting of b1) repeat units derived from aromatic vinyl monomers, b2) repeat units derived from alkyl (meth)acrylate monomers, b3) repeat units derived from (meth)acryl amide monomers, b4) repeat units derived from nitrile based monomers, and b5) repeat units derived from unsaturated carbonic acid monomers; and c1) third repeat units derived from monomers represented by the following Chemical Formula 1: wherein R1 is hydrogen, or a C1-10 alkyl group, X is hydrogen or a methyl group, Y is oxygen atom, or —NR2-, R2 is hydrogen, or a C1-10 alkyl group, and Z is a C1-10 alkyl group.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: August 20, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Min Ah Kang, Dong Jo Ryu, Seon Hee Han, Jung Sup Han, Jeong Man Son, Cheolhoon Choi
  • Patent number: 12027709
    Abstract: An anode for a lithium rechargeable battery and a lithium rechargeable battery including the same are provided. Specifically, a plurality of anode active material layers are sequentially stacked on an anode current collector, and in the innermost layer directly contacting the anode current collector, polyolefin-based polymer is applied as a binder, and in the other layers, heterogeneous polymers are applied as binders.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: July 2, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Jeong Man Son, Jung Sup Han, Dong Jo Ryu, Seon Hee Han, Min Ah Kang, Jungeun Woo, Cheolhoon Choi, Sungjin Lee
  • Patent number: 11987733
    Abstract: An acrylic adhesive composition including an acrylic copolymer formed by polymerizing a monomer mixture is provided. The monomer mixture includes a monomer represented by [Formula 1], a (meth)acrylic monomer having a crosslinkable functional group, and an alkyl (meth)acrylate-based monomer. The acrylic copolymer has a branched polymer structure. The acrylic composition also includes a polyfunctional acrylate having two or more radically polymerizable functional groups, a first photoinitiator, and a second photoinitiator, wherein the first photoinitiator is an acetophenone-based photoinitiator, and the second photoinitiator is a phosphine oxide-based photoinitiator.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: May 21, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Min Ki Lee, Kee Young Kim, Dong Jo Ryu
  • Patent number: 11973227
    Abstract: Provided are a binder composition for a secondary battery electrode, and an electrode mixture including the same, and more particularly, a binder composition for a secondary battery electrode capable of providing excellent binding strength for an active material and an electrode while having excellent latex stability, thereby improving performance of a secondary battery, and an electrode mixture including the same.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: April 30, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Seon Hee Han, Min Ah Kang, Dong Jo Ryu, Jung Sup Han, Jeong Man Son, Cheolhoon Choi
  • Patent number: 11870077
    Abstract: Provided are a binder composition for a secondary battery and an electrode mixture including the same. More particularly, provided are a binder composition for a secondary battery, the binder composition having excellent characteristics of binding strength, mechanical properties, etc., while maintaining structural stability of an electrode even after repeated charge/discharge cycles, thereby improving performances of a secondary battery, and an electrode mixture including the same.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: January 9, 2024
    Inventors: Jung Sup Han, Dong Jo Ryu, Seon Hee Han, Jeong Man Son, Min Ah Kang, Cheolhoon Choi
  • Patent number: 11817582
    Abstract: The present invention relates to a binder composition for a secondary battery, an electrode slurry composition including the same, and an electrode and a secondary battery manufactured by using the same, the binder composition including: a latex particle (A) which is a polymer of a monomer mixture including (a1) a conjugated diene monomer, (a2) an ethylenically unsaturated carboxylic acid monomer, and (a3) an aromatic vinyl monomer; and an emulsifier (B), wherein the (a2) ethylenically unsaturated carboxylic acid monomer is included in an amount of 3 parts by weight or more based on 100 parts by weight of the monomer mixture and the emulsifier (B) is included in an amount of less than 3000 ppm based on 100 parts by weight of the latex particles.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: November 14, 2023
    Inventors: Hye Soo Han, Seon Hee Han, Min Ah Kang, Cheol Hoon Choi, Dong Jo Ryu
  • Publication number: 20230080302
    Abstract: Provided is a negative electrode binder composition including a polymer (A) of a first monomer mixture containing a (meth)acrylamide group-containing monomer, an unsaturated carboxylic acid-based monomer, and a monomer having a solubility in water of 100 g/L or less; and a particulate polymer (B).
    Type: Application
    Filed: January 29, 2021
    Publication date: March 16, 2023
    Applicant: LG Chem, Ltd.
    Inventors: Min Ah Kang, Jeong Man Son, Sung Jin Lee, Dong Jo Ryu, Seon Hee Han, Jung Sup Han, Jung Eun Woo, Cheol Hoon Choi
  • Publication number: 20230079409
    Abstract: The present disclosure relates to a binder for an anode of a secondary battery, an anode of a secondary battery and a secondary battery. Specifically, there is provided a binder for an anode, which comprises a (co)polymer having a storage modulus of 100 MPa or more measured at 100° C., has elasticity enough to withstand a change in the volume of an anode active material while improving processability, and ultimately secure the lifespan of a secondary battery.
    Type: Application
    Filed: November 26, 2021
    Publication date: March 16, 2023
    Applicant: LG Chem, Ltd.
    Inventors: Min Ah Kang, Jeong Man Son, Sungjin Lee, Dong Jo Ryu, Jungeun Woo
  • Publication number: 20220384812
    Abstract: A pre-dispersant composition includes a hydrogenated nitrile-butadiene rubber and an amide-based dispersion medium, wherein viscosity is in a range of 70 cPs to 3,000 cPs when measured with a Brookfield viscometer at 25° C., and a moisture content is 0.9 wt % or less. An electrode slurry composition including the pre-dispersant composition, and an electrode for a secondary battery and a secondary battery which are prepared by using the electrode slurry composition are also provided.
    Type: Application
    Filed: January 6, 2021
    Publication date: December 1, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Jung Eun Woo, Dong Jo Ryu, Seon Hee Han, Jung Sup Han, Jeong Man Son, Min Ah Kang, Cheol Hoon Choi, Sung Jin Lee
  • Patent number: 11427509
    Abstract: The present disclosure relates to a cement additive composition including a polycarboxylic acid-based copolymer. When the cement additive composition of the present disclosure is used for cement formulation, it may improve fluidity of the composition even in a high water reducing ratio range of the particle and effectively prevent slump loss of the cement formulation, while improving initial dispersibility due to excellent water reducing performance.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: August 30, 2022
    Inventors: Chang Bum Ko, Dong Jo Ryu, Im Gyu Kim, Hyo Min Kim
  • Publication number: 20220220348
    Abstract: The present invention relates to an acrylic adhesive composition, and a polarizing plate and a display device manufactured using the same, wherein the acrylic adhesive composition includes an acrylic copolymer formed by polymerizing a monomer mixture including a (meth)acrylic monomer and a (meth)acrylic monomer containing a hydroxy group, an isocyanate-based multi-functional curing agent, a curing retarder including a first curing retarder having a deblocking temperature of 110° C. or lower and a second curing retarder having a deblocking temperature of 130° C. or higher, and a silane coupling agent.
    Type: Application
    Filed: September 22, 2020
    Publication date: July 14, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Kee Young Kim, Min Ki Lee, Dong Jo Ryu
  • Publication number: 20220209238
    Abstract: The present disclosure relates to an electrode binder composition for a rechargeable battery and an electrode mixture comprising the same. The electrode binder composition for a rechargeable battery of the present disclosure not only has excellent properties in terms of binding strength, mechanical properties, and the like, but also can maintain structural stability of an electrode even after repeated charge/discharge cycles, thus improving rechargeable battery performances.
    Type: Application
    Filed: May 28, 2020
    Publication date: June 30, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Seon Hee Han, Jung Sup Han, Min Ah Kang, Wooseok Choi, Dong Jo Ryu, Se Eun Lee, Jeong Man Son, Byoung Yun Kim, Cheolhoon Choi, Sungjin Lee
  • Patent number: 11359118
    Abstract: The an adhesive composition characterized in that the kisstack, which is defined as the force measured when a sheet coated with the adhesive composition is instantaneously peeled off after being attached, is about 6 N/inch or higher. The composition not only has excellent loop tack but also exhibits high kisstack characteristics, and thus can be widely used for various substrates.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: June 14, 2022
    Inventors: Kum Hyoung Lee, Dong Jo Ryu, Jung Sup Han, Sung Jong Seo, Jung Eun Yeo, Hyun Ju Cho
  • Publication number: 20220154042
    Abstract: An acrylic adhesive composition including an acrylic copolymer formed by polymerizing a monomer mixture is provided. The monomer mixture includes a monomer represented by [Formula 1], a (meth)acrylic monomer having a crosslinkable functional group, and an alkyl (meth)acrylate-based monomer. The acrylic copolymer has a branched polymer structure. The acrylic composition also includes a polyfunctional acrylate having two or more radically polymerizable functional groups, a first photoinitiator, and a second photoinitiator, wherein the first photoinitiator is an acetophenone-based photoinitiator, and the second photoinitiator is a phosphine oxide-based photoinitiator.
    Type: Application
    Filed: September 24, 2020
    Publication date: May 19, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Min Ki Lee, Kee Young Kim, Dong Jo Ryu
  • Publication number: 20220020992
    Abstract: There is provided an anode binder materials that can be converted into an anode binder having heat resistance, chemical resistance, excellent binding force and durability, and the like, as prerequisites for improving the performances of lithium rechargeable batteries, wherein the anode binder material comprises a vulcanization accelerator comprising a metal-organic framework (MOF); a styrene-butadiene-based copolymer; and sulfur molecule (S8).
    Type: Application
    Filed: October 14, 2020
    Publication date: January 20, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Sungjin Lee, Jeong Man Son, Dong Jo Ryu, Seon Hee Han, Jung Sup Han, Min Ah Kang, Jungeun Woo, Cheolhoon Choi
  • Patent number: 11223046
    Abstract: Disclosed is a binder composition for secondary batteries including composite latex comprising conjugated diene latex particles (A) and copolymer latex particles (B), each present in an independent phase, wherein the composite latex has a pH of 7 or less.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: January 11, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Min Ah Kang, Dong Jo Ryu, Cheol Hoon Choi, Seon Hee Han, Hye Soo Han
  • Publication number: 20210384512
    Abstract: A slurry composition for an electrode of a secondary battery, has a hydrophobically modified alkali-swellable emulsion (HASE), a poly(meth)acrylic acid and a conductive agent. The slurry composition is capable of realizing excellent electrode adhesion in high energy electrode. The electrode of a secondary battery prepared using the same, and a secondary battery are also provided.
    Type: Application
    Filed: December 17, 2019
    Publication date: December 9, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Cheolhoon Choi, Dong Jo Ryu, Seon Hee Han, Jung Sup Han, Jeong Man Son, Min Ah Kang