Patents by Inventor Yoon Ji Lee

Yoon Ji Lee 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: 9876223
    Abstract: Provided herein is a cathode for lithium-sulfur battery. The cathode for lithium-sulfur battery has a structure for improved in charge/discharge efficiency, charge capacity, and life span. In particular, in the cathode structure, an active material is inserted into a porous carbon structure and a surface of the porous carbon structure is densely coated with the conducting material thereby maximizing the contents of an active material and a conducting material in the cathode without a current collector.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: January 23, 2018
    Assignee: Hyundai Motor Company
    Inventors: Hee Yeon Ryu, Yoon Ji Lee, Hee Jin Woo, Sang Jin Park
  • Publication number: 20160190538
    Abstract: A lithium-sulfur secondary battery includes a positive electrode, a conductive and liquid-retaining structure, and a positive electrode. The conductive and liquid-retaining structure has a thickness of 5 to 100 ?m, an areal weight of 10 to 120 g/m2, and a porosity of 70 to 95% and is coated with a hydrophilic polymer.
    Type: Application
    Filed: November 23, 2015
    Publication date: June 30, 2016
    Inventors: Yoon Ji LEE, Hee Yeon RYU, Dae Gun JIN, Sang Jin PARK
  • Publication number: 20160190565
    Abstract: Disclose are a cathode of an all-solid lithium battery, and a secondary battery system using the same. The cathode includes a lithium composite, and a method of manufacturing the lithium composite comprises: dispersing a solid electrolyte to be uniformly distributed in the pores of a mesoporous conductor to provide a solid electrolyte composite, and coating the solid electrolyte composite on the surface of a lithium compound including nonmetallic solids such as S, Se, and Te.
    Type: Application
    Filed: November 9, 2015
    Publication date: June 30, 2016
    Inventors: Hee Jin Woo, Dae Gun Jin, Hee Yeon Ryu, Yoon Ji Lee, Yong Gu Kim, Na Ry Shin, Eun Ji Kwon, Sang Jin Park
  • Publication number: 20160181666
    Abstract: A lithium-sulfur battery with improved cell performance may include a carbon layer. A high loading anode is needed to increase energy density, but it is difficult to express capacity when testing a cell of the high loading anode. To retain electrolyte solution so as to improve cell performance when loading is increased, a conductive structure may be inserted to the cell, thereby providing not only electrolyte solution-retaining but also a reaction site.
    Type: Application
    Filed: November 23, 2015
    Publication date: June 23, 2016
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Yoon Ji LEE, Dae Gun JIN, Hee Jin WOO, Hee Yeon RYU, Sang Jin PARK
  • Publication number: 20160056501
    Abstract: Disclosed are a lithium electrode for a lithium metal battery, which uses a solid high-ionic conductor having a three-dimensional (3D) porous structure, wherein a lithium metal or lithium alloy is filled into each pore and dispersed, and a method for manufacturing the lithium electrode. By applying a solid high-ionic conductor having a 3D porous structure, an ion conduction path is secured in the lithium electrode using the solid high-ionic conductor instead of a conventional liquid electrolyte, electrical-chemical reactivity in charging and discharging are further improved, and shelf life and high rate capability are enhanced.
    Type: Application
    Filed: November 4, 2015
    Publication date: February 25, 2016
    Inventors: Hee Yeon Ryu, Yoon Ji Lee, Hee Jin Woo, Jun Ki Rhee, Ki Chun Lee
  • Publication number: 20150372291
    Abstract: Disclosed is a cathode for lithium-sulfur battery. The cathode for lithium-sulfur battery has a structure for improved in charge/discharge efficiency, charge capacity, and life span. In particular, in the cathode structure, an active material is inserted into a porous carbon structure and a surface of the porous carbon structure is densely coated with the conducting material thereby maximizing the contents of an active material and a conducting material in the cathode without a current collector.
    Type: Application
    Filed: April 8, 2015
    Publication date: December 24, 2015
    Inventors: Hee Yeon Ryu, Yoon Ji Lee, Hee Jin Woo, Sang Jin Park
  • Patent number: 9190658
    Abstract: Disclosed are a lithium electrode for a lithium metal battery, which uses a solid high-ionic conductor having a three-dimensional (3D) porous structure, wherein a lithium metal or lithium alloy is filled into each pore and dispersed, and a method for manufacturing the lithium electrode. By applying a solid high-ionic conductor having a 3D porous structure, an ion conduction path is secured in the lithium electrode using the solid high-ionic conductor instead of a conventional liquid electrolyte, electrical-chemical reactivity in charging and discharging are further improved, and shelf life and high rate capability are enhanced.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: November 17, 2015
    Assignee: Hyundai Motor Company
    Inventors: Hee Yeon Ryu, Yoon Ji Lee, Hee Jin Woo, Jun Ki Rhee, Ki Chun Lee
  • Publication number: 20150311489
    Abstract: An anode structure of a lithium sulfur battery includes a sulfur anode laminated on an aluminum foil, and a carbon coating layer disposed between the sulfur anode and a carbon structure layer in which sulfur is immersed. The sulfur anode includes thesulfur, a conductor, and a binder. The carbon structure layer in which sulfur is immersed is a polyester (PE) separation membrane separated from a counter electrode. A loaded amount of sulfur within the anode structure is dispersed to the sulfur anode and the carbon structure layer in which the sulfur is immersed.
    Type: Application
    Filed: December 12, 2014
    Publication date: October 29, 2015
    Inventors: Sang Jin PARK, Hee Yeon RYU, Yoon Ji LEE, Hee Jin WOO
  • Publication number: 20150118578
    Abstract: Disclosed is a cathode for a lithium sulfur battery comprising a sulfur-containing active material, an electrolyte in which a lithium salt is dissolved in an ether-based solvent, and an additional liquid active material in the form of Li2Sx (0<x?9) dissolved in the electrolyte, and a lithium sulfur battery using the same. The lithium sulfur battery of the present invention has a loading amount of cathode sulfur that is increased to at least about 13.5 mg/cm2 and a structural energy density that is increased from about 265 Wh/kg to at least about 355 Wh/kg as compared with a conventional battery.
    Type: Application
    Filed: December 31, 2013
    Publication date: April 30, 2015
    Applicant: Hyundai Motor Company
    Inventors: Won Keun Kim, Yoon Ji Lee, Jun Ki Rhee
  • Publication number: 20150037238
    Abstract: Disclosed is a method for recovering carbon dioxide from exhaust gas, more particularly, a method for recovering carbon dioxide from exhaust gas for saving the cost for recovery of carbon dioxide by decreasing energy required for recycling a carbon dioxide absorbent solution. In particular, a circulating solvent, whose heat of vaporization and/or sensible heat is lower than that of a solvent of an absorbent solution introduced to a recycling tower, is supplied to the lower portion of the recycling tower and mixed with the heated absorbent solution. As a result, the pressure inside the recycling tower is maintained so that carbon dioxide released from the absorbent solution is discharged to a storage tank/drum.
    Type: Application
    Filed: October 22, 2014
    Publication date: February 5, 2015
    Inventors: Sung Yeup Chung, Yoon Ji Lee, Sangjin Park, Ki Chun Lee
  • Patent number: 8894953
    Abstract: Disclosed is a method for recovering carbon dioxide from exhaust gas, more particularly, a method for recovering carbon dioxide from exhaust gas for saving the cost for recovery of carbon dioxide by decreasing energy required for recycling a carbon dioxide absorbent solution. In particular, a circulating solvent, whose heat of vaporization and/or sensible heat is lower than that of a solvent of an absorbent solution introduced to a recycling tower, is supplied to the lower portion of the recycling tower and mixed with the heated absorbent solution. As a result, the pressure inside the recycling tower is maintained so that carbon dioxide released from the absorbent solution is discharged to a storage tank/drum.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: November 25, 2014
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sung Yeup Chung, Yoon Ji Lee, Sang Jin Park, Ki Chun Lee
  • Publication number: 20130323603
    Abstract: The present invention provides a lithium-sulfur battery using a solid high-ionic conductor in a three-dimensional (3D) porous structure. In particular, at a higher temperature (120° C. or higher) than a melting temperature, the lithium-sulfur battery does not have fluid sulfur leaking outside of a battery cell electrode. The lithium-sulfur battery can be operated at both a high temperature and room temperature. The battery of the invention can be used without performance degradation and with increased ion conductivity at a high temperature, thus improving the battery's power performance.
    Type: Application
    Filed: October 22, 2012
    Publication date: December 5, 2013
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Hee Yeon Ryu, Yoon Ji Lee, Hee Jin Woo, Jun Ki Rhee
  • Patent number: 8585810
    Abstract: Provided is an apparatus for regenerating a carbon dioxide absorption solution that regenerates an absorption solution for absorbing carbon dioxide contained in a combustion exhaust gas emitted during a combustion process of a vehicle, thereby reducing energy costs while simplifying its configuration.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: November 19, 2013
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Yoon Ji Lee
  • Publication number: 20130295452
    Abstract: Disclosed are a lithium electrode for a lithium metal battery, which uses a solid high-ionic conductor having a three-dimensional (3D) porous structure, wherein a lithium metal or lithium alloy is filled into each pore and dispersed, and a method for manufacturing the lithium electrode. By applying a solid high-ionic conductor having a 3D porous structure, an ion conduction path is secured in the lithium electrode using the solid high-ionic conductor instead of a conventional liquid electrolyte, electrical-chemical reactivity in charging and discharging are further improved, and shelf life and high rate capability are enhanced.
    Type: Application
    Filed: July 30, 2012
    Publication date: November 7, 2013
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Hee Yeon Ryu, Yoon Ji Lee, Hee Jin Woo, Jun Ki Rhee, Ki Chun Lee
  • Publication number: 20130004406
    Abstract: Disclosed is a method for recovering carbon dioxide from exhaust gas, more particularly, a method for recovering carbon dioxide from exhaust gas for saving the cost for recovery of carbon dioxide by decreasing energy required for recycling a carbon dioxide absorbent solution. In particular, a circulating solvent, whose heat of vaporization and/or sensible heat is lower than that of a solvent of an absorbent solution introduced to a recycling tower, is supplied to the lower portion of the recycling tower and mixed with the heated absorbent solution. As a result, the pressure inside the recycling tower is maintained so that carbon dioxide released from the absorbent solution is discharged to a storage tank/drum.
    Type: Application
    Filed: September 8, 2011
    Publication date: January 3, 2013
    Applicants: KIA MOTORS CORPORATION, HYUNDAI MOTOR COMPANY
    Inventors: Sung Yeup Chung, Yoon Ji Lee, Sang Jin Park, Ki Chun Lee
  • Publication number: 20120132080
    Abstract: Provided is an apparatus for regenerating a carbon dioxide absorption solution that regenerates an absorption solution for absorbing carbon dioxide contained in a combustion exhaust gas emitted during a combustion process of a vehicle, thereby reducing energy costs while simplifying its configuration.
    Type: Application
    Filed: February 18, 2011
    Publication date: May 31, 2012
    Applicants: KIA MOTORS CORPORATION, HYUNDAI MOTOR COMPANY
    Inventor: Yoon Ji Lee