Patents by Inventor Eun Ji KWON

Eun Ji KWON 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: 20210376424
    Abstract: Disclosed are an electrolyte membrane for a lithium-air battery, a method of manufacturing the same, a cathode for a lithium-air battery, a method of manufacturing the same, and a lithium-air battery including the electrolyte membrane and the cathode. Particularly, the lithium-air battery includes i) an electrolyte membrane, which is manufactured using an inorganic melt admixture including two or more nitrogen-oxide compounds and thus may have a very low eutectic point, and ii) a cathode, which is manufactured by reducing a metal at a fast speed on a carbon material. As such, the lithium-air battery is capable of stably operating even at low temperatures and providing high power output.
    Type: Application
    Filed: December 21, 2020
    Publication date: December 2, 2021
    Inventors: Eun Ji Kwon, Samuel Seo, Gwang Seok Oh, Seok Ju Kang, Kyung Eun Baek
  • Publication number: 20210355240
    Abstract: A protein transduction domain and a fusion compound, which are more efficient, are proposed. As a result of selecting and testing a number of candidate peptides, the present inventors found that a GK1 peptide comprising 18 amino acids and a modified sequence obtained by replacing, adding, or deleting some sequences are bonded to high-molecular-weight materials such as proteins based on the basic sequence of the peptide, thus enabling the high-molecular-weight materials to smoothly penetrate into living bodies, for example, cells, tissues, or blood. A fusion compound, oligonucleotide, or vector using the same may be applied as a pharmaceutical composition for preventing or treating diseases.
    Type: Application
    Filed: October 30, 2020
    Publication date: November 18, 2021
    Inventors: Soo-Young CHOI, Jin-Seu PARK, Kyuhyung HAN, Keunwook LEE, Jong Kook PARK, Sunghou LEE, Sung Ho LEE, Soojung PARK, Won Sik EUM, Min Jea SHIN, Hyeon Ji YEO, Eun Ji YEO, Yeon Joo CHOI, Eun Jeong SOHN, Hyun Ju CHA, Hyun Jung KWON, Dae Won KIM
  • Patent number: 11177472
    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: Grant
    Filed: May 3, 2019
    Date of Patent: November 16, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    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
  • Patent number: 11075403
    Abstract: The present disclosure relates to garnet powder, a manufacturing method thereof, a solid electrolyte sheet using a hot press, and a manufacturing method thereof. In particular, the present disclosure provides a method for manufacturing Li7La3Zr2O12 (LLZ) garnet powder including preparing a mixture by first dry mixing Li2CO3, La2O3, ZrO2, and Al2O3. The mixture is first calcinated for 5 to 7 hours in a temperature range of 800 to 1000° C. The calcinated mixture is ground to a powder with an average particle size of 1 to 4 ?m through dry grinding. A cubic-phased LLZ garnet powder is prepared by second calcinating the ground mixture for 10 to 30 hours in a temperature range of 1100 to 1300° C.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: July 27, 2021
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Ju Young Sung, Ho Taek Lee, Eun Ji Kwon, Yong Jun Jang, Ji Na Kim
  • Patent number: 11069900
    Abstract: The present disclosure relates to a positive electrode for lithium air batteries, a method of manufacturing the positive electrode, and a lithium air battery including the positive electrode, and more particularly to a positive electrode for lithium air batteries, wherein the positive electrode is manufactured through a dry process instead of a conventional wet process and a mixture of a positive electrode active material and a binder is ball-milled under specific conditions, thereby reducing or preventing a swelling phenomenon due to a solvent and increasing the force of coupling between the positive electrode active material and the binder, whereby it is possible to manufacture a high-density electrode and to improve the durability of the electrode, and wherein the lifespan of a lithium air battery is increased when the positive electrode is applied to the battery.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: July 20, 2021
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Dae Gun Jin, Eun Ji Kwon, Jee Youn Hwang, Ji Hoon Jang, Gwang Seok Oh, Won Keun Kim, Samuel Seo
  • Publication number: 20210104794
    Abstract: A cylindrical lithium-air battery package includes: a cylindrical unit cell formed by cylindrically winding components of the lithium-air battery and a current collection case to accommodate the cylindrical unit cell. The cylindrical lithium-air battery package enables smooth supply and diffusion of air to cathodes included in cylindrical unit cell and enables efficient current collection by packing the cylindrical unit cells in a current collection case so that air supply and current collection is performed through both sides rather than through the circumferential surface of the cylindrical unit cells.
    Type: Application
    Filed: September 17, 2020
    Publication date: April 8, 2021
    Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Gwang Seok OH, Won Keun KIM, Jong Chan SONG, Ji Yong LEE, Eun Ji KWON
  • Publication number: 20200381779
    Abstract: Disclosed herein is a gel electrolyte composition and a method of manufacturing a gel electrolyte using the same, and more particularly to a method of manufacturing a gel electrolyte for a lithium-air battery, which is in a gel phase using a gel electrolyte composition including inorganic particles including silica.
    Type: Application
    Filed: December 4, 2019
    Publication date: December 3, 2020
    Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Eun Ji KWON, Gwang Seok OH, Samuel SEO
  • Publication number: 20200373549
    Abstract: A pouch type lithium secondary battery includes: a lead tab-protecting member to suppress occurrence of an electrical short circuit with a lead tab due to a dendrite formed in a positive electrode during charge and discharge of the pouch type lithium secondary battery.
    Type: Application
    Filed: November 26, 2019
    Publication date: November 26, 2020
    Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Jong Chan Song, Gwang Seok Oh, Eun Ji Kwon
  • Publication number: 20200144629
    Abstract: The present disclosure relates to a positive electrode for lithium air batteries, a method of manufacturing the positive electrode, and a lithium air battery including the positive electrode, and more particularly to a positive electrode for lithium air batteries, wherein the positive electrode is manufactured through a dry process instead of a conventional wet process and a mixture of a positive electrode active material and a binder is ball-milled under specific conditions, thereby reducing or preventing a swelling phenomenon due to a solvent and increasing the force of coupling between the positive electrode active material and the binder, whereby it is possible to manufacture a high-density electrode and to improve the durability of the electrode, and wherein the lifespan of a lithium air battery is increased when the positive electrode is applied to the battery.
    Type: Application
    Filed: June 6, 2019
    Publication date: May 7, 2020
    Inventors: Dae Gun JIN, Eun Ji KWON, Jee Youn HWANG, Ji Hoon JANG, Gwang Seok OH, Won Keun KIM, Samuel SEO
  • Publication number: 20200058957
    Abstract: Disclosed are a lithium-air battery and a method of manufacturing the same. The weight of the battery may be reduced and the energy density thereof may be improved by eliminating two separators, which are stacked on a gas diffusion layer and a current collector in the related art, and by using two kinds of gel polymer electrolyte membranes, each including a gelled polymer matrix impregnated with an electrolyte, as a separation membrane. The volatilization, leakage or bias of the electrolyte may be prevented by restricting the fluidity of the electrolyte. In addition, the capacity and lifespan of the battery may be increased.
    Type: Application
    Filed: November 21, 2018
    Publication date: February 20, 2020
    Inventors: Eun Ji Kwon, Yoon Ji Lee
  • Publication number: 20190260021
    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: May 3, 2019
    Publication date: August 22, 2019
    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
  • Patent number: 10326128
    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: Grant
    Filed: November 9, 2015
    Date of Patent: June 18, 2019
    Assignee: Hyundai Motor Company
    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: 20180294519
    Abstract: The present disclosure relates to garnet powder, a manufacturing method thereof, a solid electrolyte sheet using a hot press, and a manufacturing method thereof. In particular, the present disclosure provides a method for manufacturing Li7La3Zr2O12 (LLZ) garnet powder including preparing a mixture by first dry mixing Li2CO3, La2O3, ZrO2, and Al2O3. The mixture is first calcinated for 5 to 7 hours in a temperature range of 800 to 1000° C. The calcinated mixture is ground to a powder with an average particle size of 1 to 4 ?m through dry grinding. A cubic-phased LLZ garnet powder is prepared by second calcinating the ground mixture for 10 to 30 hours in a temperature range of 1100 to 1300° C.
    Type: Application
    Filed: June 5, 2018
    Publication date: October 11, 2018
    Inventors: Ju Young SUNG, Ho Taek LEE, Eun Ji KWON, Yong Jun JANG, Ji Na KIM
  • Patent number: 10096857
    Abstract: Disclosed are a garnet-type solid electrolyte and a method for preparing the same. The garnet-based solid electrolyte of the present invention is prepared by adding Al2O3 to a precursor containing hydroxide, thereby enhancing sintered density and ionic conductivity while having a pure cubic phase crystal structure without including impurities.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: October 9, 2018
    Assignee: Hyundai Motor Company
    Inventors: Ju Young Sung, Eun Ji Kwon, Ji Na Kim, Yong Jun Jang
  • Patent number: 10008740
    Abstract: The present disclosure relates to garnet powder, a manufacturing method thereof, a solid electrolyte sheet using a hot press, and a manufacturing method thereof. In particular, the present disclosure provides a method for manufacturing Li7La3Zr2O12 (LLZ) garnet powder including preparing a mixture by first dry mixing Li2CO3, La2O3, ZrO2, and Al2O3. The mixture is first calcinated for 5 to 7 hours in a temperature range of 800 to 1000° C. The calcinated mixture is ground to a powder with an average particle size of 1 to 4 ?m through dry grinding. A cubic-phased LLZ garnet powder is prepared by second calcinating the ground mixture for 10 to 30 hours in a temperature range of 1100 to 1300° C.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: June 26, 2018
    Assignee: HYUNDAI MOTOR COMPANY
    Inventors: Ju Young Sung, Ho Taek Lee, Eun Ji Kwon, Yong Jun Jang, Ji Na Kim
  • Publication number: 20180123181
    Abstract: An all-solid battery that stably maintains an interface between a solid electrolyte layer and a negative electrode long-term is provided. Specifically, the interface between the solid electrolyte layer and the negative electrode can be stably maintained long-term by using a lithium metal as the negative electrode material and disposing a sacrificial layer between the solid electrolyte layer and the negative electrode so that the negative electrode and the sacrificial layer can form an alloy.
    Type: Application
    Filed: January 27, 2017
    Publication date: May 3, 2018
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Sam Ick Son, Eun Ji Kwon
  • Publication number: 20180026299
    Abstract: A method of manufacturing a high-density solid electrolyte thin film using a room-temperature high-speed powder spray method, nay include (a) preparing oxide-based solid electrolyte powder having an average particle size of 0.1 to 10 ?m; (b) heat-treating the oxide-based solid electrolyte powder; and (c) forming an oxide-based solid electrolyte thin film by spraying the oxide-based solid electrolyte powder on an anode layer or a cathode layer by a room-temperature high-speed powder spray method.
    Type: Application
    Filed: December 13, 2016
    Publication date: January 25, 2018
    Applicant: Hyundai Motor Company
    Inventors: Sam Ick SON, Eun Ji KWON
  • Publication number: 20170170523
    Abstract: Disclosed are a solid-state battery and a manufacturing method thereof. The solid-state battery includes two or more unit cells which are laminated by a serial or parallel method. In particular, the two or more unit cells are laminated such that a current collector of a unit cell contacts an electrode layer of a next unit cell. Accordingly it does not need to pressurize with a high pressure, which does not result in any short circuit between the unit cells, and the solid-state battery can stably operate.
    Type: Application
    Filed: October 10, 2016
    Publication date: June 15, 2017
    Inventors: Ji Na Kim, Ho Taek Lee, Eun Ji Kwon, Sang Jin Park
  • Publication number: 20160268638
    Abstract: Disclosed is a method of manufacturing an all-solid battery by a wet-dry mixing process, such that a binder can be uniformly dispersed in a solid electrolyte layer. As such, the size of the battery can be increased and and a thickness of the battery can be reduced.
    Type: Application
    Filed: December 11, 2015
    Publication date: September 15, 2016
    Inventors: Yong Jun Jang, Ho Taek Lee, Eun Ji Kwon, Ju Young Sung, Ji Na Kim
  • Publication number: 20160190639
    Abstract: Disclosed are a garnet-type solid electrolyte and a method for preparing the same. The garnet-based solid electrolyte of the present invention is prepared by adding Al2O3 to a precursor containing hydroxide, thereby enhancing sintered density and ionic conductivity while having a pure cubic phase crystal structure without including impurities.
    Type: Application
    Filed: November 9, 2015
    Publication date: June 30, 2016
    Inventors: Ju Young Sung, Eun Ji Kwon, Ji Na Kim, Yong Jun Jang