Patents by Inventor Hyeon Choi

Hyeon Choi 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: 11824200
    Abstract: A conductive material dispersion includes a carbon-based conductive material, a main dispersant, an auxiliary dispersant, and a dispersion medium, wherein the main dispersant is a nitrile-based copolymer and the auxiliary dispersant is a copolymer including an oxyalkylene unit and at least one selected from the group consisting of a styrene unit and an alkylene unit.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: November 21, 2023
    Inventors: Dong Hyun Kim, Houng Sik Yoo, Seong Kyun Kang, Gye Min Kwon, Hyeon Choi
  • Publication number: 20230357072
    Abstract: A composition for mid-infrared light transmitting glass and a method for preparing same are disclosed. Provided according to an embodiment of the present invention are a composition for mid-infrared light transmitting glass and a method for preparing same, wherein the composition can be manufactured into a lens that has both excellent optical properties and physical properties.
    Type: Application
    Filed: April 21, 2021
    Publication date: November 9, 2023
    Inventors: Ju Hyeon CHOI, Jeong Hwan IN, Seon Hoon KIM
  • Publication number: 20230352662
    Abstract: In an embodiment a cathode for an all-solid-state battery includes a composite material comprising a cathode active material and a coating layer completely covering a surface of the cathode active material, wherein the coating layer comprises a first solid electrolyte and a second solid electrolyte.
    Type: Application
    Filed: November 30, 2022
    Publication date: November 2, 2023
    Inventors: Seong Hyeon Choi, Yong Jun Jang, In Woo Song, Sang Heon Lee, So Young Kim, Sun Ho Choi, Mun Seok Chae, Ho Cheol Shin, Sa Heum Kim, Sang Soo Lee
  • Publication number: 20230348734
    Abstract: Provided is a conductive material dispersion comprising single-walled carbon nanotubes, a dispersant, a dispersion aid, and a dispersion medium, wherein the dispersant comprises polyvinyl butyral and hydrogenated nitrile butadiene rubber, and the dispersion aid comprises a compound represented by Formula 1. A-(R)n??[Formula 1] In Formula 1, A is a structure having a carbon number of 16 to 50 carbon number and comprising four or more aromatic rings and nitrogen, R is a structure comprising an anionic functional group, and n is an integer of 1 to 5.
    Type: Application
    Filed: May 25, 2022
    Publication date: November 2, 2023
    Applicant: LG Energy Solution, Ltd.
    Inventors: Hyo Sook Joo, Houng Sik Yoo, Dong Hyun Kim, Il Jae Moon, Hyeon Choi, Woo Ha Kim, Sung Soo Yoon
  • Patent number: 11799089
    Abstract: The present disclosure relates to antioxidant for a polymer electrolyte membrane fuel cell electrode catalyst, which includes cerium hydrogen phosphate (HCe2(PO4)3(H2O)) in the form of a nanofiber, and an electrode and a membrane-electrode assembly including the same. The electrode for a polymer electrolyte membrane fuel cell of the present disclosure, wherein the antioxidant is dispersed, can improve the mechanical strength of an electrode catalyst layer and can minimize deterioration of chemical durability even after long-term operation. And, a fuel cell including the same can exhibit high output performance and can operate stably even after long-term operation.
    Type: Grant
    Filed: January 10, 2022
    Date of Patent: October 24, 2023
    Assignee: Korea Institute of Science and Technology
    Inventors: So Young Lee, Seung Ju Lee, Jin Hyeon Choi, Jeawoo Jung, Hyoung-Juhn Kim, Sung Jong Yoo, Hee-Young Park, Bora Seo, Jin Young Kim, Jong Hyun Jang
  • Publication number: 20230335740
    Abstract: A positive electrode slurry composition, a positive electrode and a secondary battery including the same are disclosed herein. In some embodiments, a slurry composition includes a lithium iron phosphate-based positive electrode active material, a binder, a conductive agent, a dispersant, and a solvent, wherein the dispersant includes a nitrile-based copolymer and a polymer dispersant containing an oxyalkylene unit, wherein the oxyalkylene unit is present in an amount of 60 wt% or more, based on the total weight of the polymer dispersant.
    Type: Application
    Filed: March 17, 2022
    Publication date: October 19, 2023
    Applicant: LG Energy Solution, Ltd.
    Inventors: Joo Yeon Ha, Houng Sik Yoo, Dong Hyun Kim, Hyeon Choi
  • Patent number: 11773236
    Abstract: Provided is a method of preparing a superabsorbent polymer sheet, including polymerization of monomers in the presence of an encapsulated foaming agent and an inorganic foaming agent. According to the method of preparing the superabsorbent polymer sheet of the present invention, a porous flexible superabsorbent polymer sheet may be prepared.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: October 3, 2023
    Inventors: Kiyoul Yoon, Seongkyun Kang, Gicheul Kim, Hyeon Choi, Ju Eun Kim
  • Patent number: 11735714
    Abstract: A negative electrode slurry composition including (1) clay particles having, a plate-type structure and an average particle diameter (D50) of 10 nm to 2 ?m, (2) carboxymethylcellulose (CMC), (3) a negative electrode active material, and (4) an aqueous solvent, wherein a weight ratio of the carboxymethylcellulose and the clay particles is 9.5:0.5 to 4:6. The negative electrode slurry composition is capable of solving problems due to the deterioration of storage stability and dispersibility of solids in a negative electrode slurry composition having a high solid content.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: August 22, 2023
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventors: Jong Won Lee, Houng Sik Yoo, Hyeon Choi
  • Publication number: 20230241582
    Abstract: The present disclosure relates to a super absorbent polymer composition. More specifically, the present disclosure relates to a super absorbent polymer composition prepared such that agglomeration between polymer particles is suppressed by including an additive having a specific structure, and thus an additional pulverizing process is not required after drying.
    Type: Application
    Filed: November 10, 2020
    Publication date: August 3, 2023
    Applicant: LG Chem, Ltd.
    Inventors: Se Yeol Park, Gicheul Kim, Hyeon Choi, Mihee Kim, Kiyoul Yoon, Ki Hyun Kim
  • Publication number: 20230216066
    Abstract: A bead-type separator for a fuel cell includes a reaction surface disposed at a center of the separator and for reacting a flowing reaction gas, a diffusion part disposed at both sides of the reaction surface for diffusing the reaction gas, multiple manifold through-holes disposed in regions at both ends of the separator and introducing or discharging the reaction gas, and multiple protruding inner bead seals along a periphery of the regions in which the manifold through-holes are disposed, wherein the inner bead seals comprise a first inner bead seal disposed at the periphery of the region in which the manifold through-hole configured to discharge the reaction gas is formed, and wherein the first inner bead seal includes multiple main discharge bead flow fields protruding in tunnel shapes from a diffusion part and multiple main connection bead flow fields.
    Type: Application
    Filed: July 26, 2022
    Publication date: July 6, 2023
    Inventor: Jae Hyeon Choi
  • Publication number: 20230201801
    Abstract: The present disclosure relates to a super absorbent polymer, and a preparation method thereof. More specifically, it relates to a super absorbent polymer prepared such that agglomeration between pulverized particles is suppressed, and drying efficiency and uniformity of particle size distribution are improved by including a carboxylic acid-based additive having a specific structure and hydrophobic particles before drying the hydrogel polymer, and a preparation method thereof.
    Type: Application
    Filed: September 10, 2021
    Publication date: June 29, 2023
    Applicant: LG Chem, Ltd.
    Inventors: Yu Jin Kim, Hyeon Choi, Seongkyun Kang, Kiyoul Yoon, Gicheul Kim, Yoon Jae Min, Seul Ah Lee, Ui Seok Chung
  • Patent number: 11682757
    Abstract: Provided is a composite anode active material including: a carbonaceous material; a metal alloyable with lithium, located on a surface of the carbonaceous material; and a silicon coating layer located on a surface of the carbonaceous material, on a surface of the metal alloyable with lithium, or a combination thereof.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: June 20, 2023
    Assignee: UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)
    Inventors: Jaephil Cho, Jaekyung Sung, Seong Hyeon Choi, Jiyoung Ma, Yoonkwang Lee
  • Publication number: 20230189650
    Abstract: Provided is a preparation method for a thermoelectric composite. The preparation method for a thermoelectric composite comprises the steps of: preparing a base substrate containing a first binary metal oxide; and providing a metal precursor and a reaction material containing oxygen (O) onto the base substrate to form a material film containing a second biliary metal oxide resulting from the reaction of the metal precursor and the reaction material, wherein in the step of forming the material film, a 2-dimensional electron gas is generated between the base substrate and the material film as the material film is formed on the base substrate.
    Type: Application
    Filed: February 2, 2023
    Publication date: June 15, 2023
    Applicants: Industry-University Cooperation Foundation Hanyang University Erica Campus, Ajou University Industry-Academic Cooperation Foundation
    Inventors: Tae Joo Park, Sang Woon Lee, Dae Woong Kim, Tae Jun Seok, Jae Hyun Yoon, Ji Hyeon Choi
  • Publication number: 20230183648
    Abstract: Provided are a composition for regulating stem cell function comprising the genus Lactobacillus bacteria-derived extracellular vesicles as an active ingredient, and a method for regulating a stem cell function using the same, wherein the genus Lactobacillus bacterial-derived extracellular vesicles have the effect of greatly improving the proliferation of stem cells, and the extracellular vesicles are naturally secreted from a symbiotic the genus Lactobacillus strain in human tonsillar tissue and are human-friendly and natural substances, and thus can be used in various research fields by promoting the proliferation of aged stem cells with minimal toxicity and side effects.
    Type: Application
    Filed: February 26, 2021
    Publication date: June 15, 2023
    Applicants: MD HEALTHCARE INC., CHUNGBUK NATIONAL UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION
    Inventors: Yoon-Keun KIM, Yoon Shin PARK, Da Hyeon CHOI
  • Publication number: 20230178798
    Abstract: A lithium metal halide-based solid electrolyte for an all-solid-state battery with excellent lithium ion conductivity, includes a compound represented by the following Chemical Formula 1. Li6-a(M11-bM2b)X6??[Chemical Formula 1] wherein M1 comprises a group 3 element, a group 4 element or a group 13 element, M2 comprises silicon (Si), germanium (Ge), tin (Sn) or lead (Pb), X comprises chlorine (Cl), bromine (Br) or iodine (I), 0?b?1, and a is a number satisfying the following Mathematical Formula 1.
    Type: Application
    Filed: November 30, 2022
    Publication date: June 8, 2023
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION, Industry-University Cooperation Foundation Hanyang University ERICA Campus
    Inventors: Yong Jun Jang, Sang Heon Lee, Sang Soo Lee, So Young Kim, Seong Hyeon Choi, Sun Ho Choi, Dae Yeon Hwang, Mun Seok Chae, Ho Cheol Shin, Kwang Jin Kim, Sa Heum Kim, In Woo Song, Sang Uck Lee, Byeong Sun Jun, Ji Hoon Kim
  • Publication number: 20230175153
    Abstract: A method of manufacturing an electrode for water electrolysis having high catalytic activity for a hydrogen evolution reaction by forming a catalyst layer in which molybdenum oxide and a Ni-Mo-based alloy are mixed and an electrode for water electrolysis manufactured thereby are described. The method includes preparing catalyst materials including a solvent, a nickel (Ni) precursor, a molybdenum (Mo) precursor, and sodium citrate, preparing an electrode base material, obtaining a plating solution by dissolving the nickel (Ni) precursor, the molybdenum (Mo) precursor, and the sodium citrate in the solvent, and forming a catalyst layer on the surface of the electrode base material by immersing the electrode base material in the plating solution and applying an electric current.
    Type: Application
    Filed: October 17, 2022
    Publication date: June 8, 2023
    Inventors: Seung Hyeon Choi, Hoon Mo Park, Min Ju Park, Se Young Lee, Eun Ae Cho, Dong Hoon Song, Hyo Won Kim, Yong Keun Kwon, Jeong Han Roh
  • Patent number: 11654416
    Abstract: The present invention relates to a super-absorbent polymer having excellent properties, both centrifugal retention capacity (CRC) and absorption under pressure (AUP) having been improved by introducing a surface crosslinked layer crosslinked by surface-modified inorganic particles, and to a method for preparing the same. The super-absorbent polymer comprises: a base resin powder containing a crosslinked polymer of water-soluble ethylene-based unsaturated monomers having an at least partially neutralized acidic group; and a surface crosslinked layer formed on the base resin powder, wherein inorganic particles may be chemically bound to the crosslinked polymer contained in the surface crosslinked layer, via an oxygen-containing bond or a nitrogen-containing bond.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: May 23, 2023
    Inventors: Sung Soo Park, Gi Cheul Kim, Ju Eun Kim, Hyeon Choi, Hyo Sook Joo, Sung Hyun Park, Hee Jung Choi, Ki Youl Yoon
  • Publication number: 20230150815
    Abstract: The present disclosure relates to a hydrogen reforming system including a reforming part configured to extract hydrogen from a source gas, and a metal hydride compressor configured to be operated by waste heat discharged from the reforming part and to compress the hydrogen discharged from the reforming part, thereby obtaining an advantageous effect of combining the function of two machines and improving energy efficiency.
    Type: Application
    Filed: June 21, 2022
    Publication date: May 18, 2023
    Inventors: Ji Hye Park, Seung Hyeon Choi
  • Publication number: 20230141308
    Abstract: An embodiment of the present disclosure relates to a hydrogen supply system including a water electrolysis stack configured to produce hydrogen by electrochemically decomposing water, and a metal hydride compressor connected to the water electrolysis stack and configured to treat the hydrogen before supplying the hydrogen to a supply destination, thereby obtaining an advantageous effect of simplifying a structure and improving spatial utilization and a degree of design freedom.
    Type: Application
    Filed: March 22, 2022
    Publication date: May 11, 2023
    Inventors: Seung Hyeon Choi, Ji Hye Park
  • Publication number: 20230145939
    Abstract: Provided according to one embodiment of the present invention is a marker composition for diagnosis or prognosis of esophageal cancer or thymic carcinoma, comprising an exosome overexpressing GRIP and coiled-coil domain-containing protein 2 (GCC2).
    Type: Application
    Filed: April 5, 2021
    Publication date: May 11, 2023
    Inventors: Hyun Koo Kim, Byeong Hyeon Choi, Yuhua Quan, Jiyun Rho