Patents by Inventor Houng Sik YOO

Houng Sik YOO 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: 12132207
    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: Grant
    Filed: March 17, 2022
    Date of Patent: October 29, 2024
    Assignee: LG Energy Solution, Ltd.
    Inventors: Joo Yeon Ha, Houng Sik Yoo, Dong Hyun Kim, Hyeon Choi
  • Patent number: 11984601
    Abstract: A conductive material dispersion liquid, and an electrode and a lithium secondary battery manufactured using the same. The conductive material dispersion liquid includes a carbon-based conductive material, a dispersant, and a dispersion medium. The dispersant is a copolymer including a first repeating unit represented by Chemical Formula 1, a second repeating unit represented by Chemical Formula 2, and a third repeating unit represented by Chemical Formula 3, and the dispersion medium is a non-aqueous solvent.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: May 14, 2024
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventors: Houng Sik Yoo, Hyeon Choi, Dong Hyun Kim, Hyun Sik Chae, Sang Hoon Choy, Hyung Suk Cho
  • Publication number: 20240120556
    Abstract: An electrode insulating coating composition according to the present invention includes boehmite particles, a dispersant, a binder, and a solvent, wherein the dispersant includes two or more fatty acid compounds, and is included in an amount of 1.2 to 8.8 parts by weight with respect to 100 parts by weight of the boehmite particles.
    Type: Application
    Filed: October 31, 2022
    Publication date: April 11, 2024
    Applicant: LG ENERGY SOLUTION, LTD.
    Inventors: Houng Sik YOO, Dong Hyun KIM, Sang Hoon CHOY, Hyeon CHOI
  • Publication number: 20240047687
    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: Application
    Filed: October 9, 2023
    Publication date: February 8, 2024
    Applicant: LG Energy Solution, Ltd.
    Inventors: Dong Hyun Kim, Houng Sik Yoo, Seong Kyun Kang, Gye Min Kwon, Hyeon Choi
  • Publication number: 20240034891
    Abstract: An electrode insulating coating composition according to the present disclosure includes boehmite particles, a dispersant, a binder, and a non-aqueous solvent, wherein the dispersant includes a phenolic compound containing two or more aromatic rings, and is included in an amount of 1.2 to 8.8 parts by weight with respect to 100 parts by weight of the boehmite particles.
    Type: Application
    Filed: October 31, 2022
    Publication date: February 1, 2024
    Applicant: LG ENERGY SOLUTION, LTD.
    Inventors: Houng Sik YOO, Dong Hyun KIM, Sung Chul PARK, Sang A CHOI, Seong Keun JANG, Sang Hoon CHOY, Hyeon CHOI, Sung Soo YOON, Byoung Hoon AHN
  • Patent number: 11845655
    Abstract: The present invention relates to a carbon nanotube dispersion including carbon nanotubes, a polymer dispersant containing an amine, a phenolic compound including two or more aromatic rings, and an aqueous solvent, wherein the polymer dispersant and the phenolic compound including two or more aromatic rings are included in a weight ratio of 100:1 to 100:90, and having low viscosity and a small change of viscosity over time.
    Type: Grant
    Filed: November 23, 2022
    Date of Patent: December 19, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Dong Hyun Kim, Houng Sik Yoo, Jin Myung Cha, Gye Min Kwon, Hyun Sik Chae, Dong Hyun Cho, Sang Hoon Choy, Hyeon Choi, Hyung Suk Cho
  • 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: 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
  • 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: 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: 20230085066
    Abstract: The present invention relates to a carbon nanotube dispersion including carbon nanotubes, a polymer dispersant containing an amine, a phenolic compound including two or more aromatic rings, and an aqueous solvent, wherein the polymer dispersant and the phenolic compound including two or more aromatic rings are included in a weight ratio of 100:1 to 100:90, and having low viscosity and a small change of viscosity over time.
    Type: Application
    Filed: November 23, 2022
    Publication date: March 16, 2023
    Inventors: Dong Hyun KIM, Houng Sik YOO, Jin Myung CHA, Gye Min KWON, Hyun Sik CHAE, Dong Hyun CHO, Sang Hoon CHOY, Hyeon CHOI, Hyung Suk CHO
  • Patent number: 11581531
    Abstract: A negative electrode slurry and a method of preparing the same. The negative electrode slurry includes lithium titanium oxide (LTO), a carboxylic acid-containing polymer dispersant, a binder, and an aqueous solvent. The carboxylic acid-containing polymer dispersant has a weight average molecular weight (Mw) of 2,500 g/mol to 500,000 g/mol and is present in an amount of 1.5 parts by weight to 20 parts by weight with respect to 100 parts by weight of the lithium titanium oxide.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: February 14, 2023
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventors: Dong Hyun Kim, Houng Sik Yoo, Hyeon Choi
  • Patent number: 11542164
    Abstract: The present invention relates to a carbon nanotube dispersion including carbon nanotubes, a polymer dispersant containing an amine, a phenolic compound including two or more aromatic rings, and an aqueous solvent, wherein the polymer dispersant and the phenolic compound including two or more aromatic rings are included in a weight ratio of 100:1 to 100:90, and having low viscosity and a small change of viscosity over time.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: January 3, 2023
    Assignee: LG Chem, Ltd.
    Inventors: Dong Hyun Kim, Houng Sik Yoo, Jin Myung Cha, Gye Min Kwon, Hyun Sik Chae, Dong Hyun Cho, Sang Hoon Choy, Hyeon Choi, Hyung Suk Cho
  • Patent number: 11539099
    Abstract: A slurry composition for coating a secondary battery separator, a separator prepared using the same, and a secondary battery including the separator, wherein the slurry composition includes a phenolic compound including two or more aromatic rings, inorganic particles, a binder, and a solvent.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: December 27, 2022
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventors: Gye Min Kwon, Houng Sik Yoo, Hyeon Choi, Da Kyung Han, Je An Lee
  • Publication number: 20220209239
    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: Application
    Filed: May 12, 2020
    Publication date: June 30, 2022
    Applicant: LG Energy Solution, Ltd.
    Inventors: Dong Hyun Kim, Houng Sik Yoo, Seong Kyun Kang, Gye Min Kwon, Hyeon Choi
  • Publication number: 20220166027
    Abstract: A carbon nanotube dispersion includes carbon nanotubes (CNT) having a Brunauer-Emmett-Teller (BET) specific surface area of 800 m2/g or more, a dispersant, and a water-based solvent, wherein the dispersant includes a polymer dispersant containing an amine and a phenolic compound containing two or more aromatic rings.
    Type: Application
    Filed: August 21, 2020
    Publication date: May 26, 2022
    Applicant: LG Energy Solution, Ltd.
    Inventors: Dong Hyun Kim, Houng Sik Yoo, Il Jae Moon, Sang Hoon Choy, Hyeon Choi
  • Publication number: 20220158194
    Abstract: The present invention relates to an electrode and a secondary battery including the same, the electrode including an electrode active material layer, wherein: the electrode active material layer includes an electrode active material, a hydrogenated nitrile butadiene rubber, and a conductive agent; the conductive agent includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded; and the carbon nanotube structure is included in the electrode active material layer in an amount of 0.01-0.5 wt %.
    Type: Application
    Filed: March 27, 2020
    Publication date: May 19, 2022
    Applicant: LG Energy Solution, Ltd.
    Inventors: Tae Gon Kim, Wang Mo Jung, Houng Sik Yoo, Bo Ram Lee, Dong Hyun Kim, Hak Yoon Kim
  • Patent number: 11309541
    Abstract: A negative electrode slurry including a lithium titanium oxide, a dispersant including a polar OH group and a non-polar alkyl group, a binder, and a solvent, and a method of preparing the same.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: April 19, 2022
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventors: Dong Hyun Kim, Houng Sik Yoo, Byoung Hoon Ahn, Sang Hoon Choy, Hyeon Choi
  • Patent number: 11283058
    Abstract: A method of preparing a slurry composition for a secondary battery positive electrode includes preparing a positive electrode active material pre-dispersion by mixing a lithium iron phosphate-based positive electrode active material, a dispersant, and a solvent, and preparing a slurry for a positive electrode by further mixing a conductive agent, a binder, and an additional solvent with the positive electrode active material pre-dispersion is provided. A positive electrode for a secondary battery which is prepared by using the same method, and a lithium secondary battery including the positive electrode are also provided.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: March 22, 2022
    Inventors: Byoung Hoon Ahn, Houng Sik Yoo, Gye Min Kwon, Sang Hoon Choy
  • Publication number: 20210246028
    Abstract: The present invention relates to a carbon nanotube dispersion including carbon nanotubes, a polymer dispersant containing an amine, a phenolic compound including two or more aromatic rings, and an aqueous solvent, wherein the polymer dispersant and the phenolic compound including two or more aromatic rings are included in a weight ratio of 100:1 to 100:90, and having low viscosity and a small change of viscosity over time.
    Type: Application
    Filed: June 7, 2019
    Publication date: August 12, 2021
    Inventors: Dong Hyun KIM, Houng Sik YOO, Jin Myung CHA, Gye Min KWON, Hyun Sik CHAE, Dong Hyun CHO, Sang Hoon CHOY, Hyeon CHOI, Hyung Suk CHO