Patents by Inventor Ji Heon Ryu

Ji Heon 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).

  • Patent number: 11088380
    Abstract: The provided are an electrolyte for redox flow battery and a redox flow battery comprising the same, wherein the electrolyte for redox flow battery comprises a solute and a solvent, wherein said solute comprises at least one of anode active material and cathode active material, wherein said anode active material comprises at least one of organic compounds having a carbonyl group such as benzophenone-, benzoquinone-, dimethyl terephthalate-, and 1,4-diacetylbenzene-based organic compounds, and said cathode active material comprises at least one of amine-, tetrathiafulvalene-, and N,N,N?,N?-tetramethyl-p-phenylenediamine-based organic compounds.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: August 10, 2021
    Assignee: Seoul National University R&DB Foundation
    Inventors: Seung Mo Oh, Hyun-seung Kim, Youngjin Kim, Taeho Yoon, Ji Heon Ryu, Junsoo Jang
  • Publication number: 20210239322
    Abstract: The present disclosure relates to a cooking apparatus including a knob assembly used to operate the cooking apparatus. The cooking apparatus includes a main body comprising a control panel, a valve disposed inside the main body and comprising a valve shaft configured to be movable, and a knob assembly comprising a knob cover rotatably disposed on the control panel, and a knob body configured to be pushed separately from the knob cover to push the valve shaft so that the valve shaft is prevented from being pushed by the knob cover.
    Type: Application
    Filed: May 13, 2019
    Publication date: August 5, 2021
    Inventors: Dae Han BANG, Beom Gon KIM, Sung Kwang KIM, Ji Heon RYU, Jea Won LEE
  • Publication number: 20200153021
    Abstract: The provided are an electrolyte for redox flow battery and a redox flow battery comprising the same, wherein the electrolyte for redox flow battery comprises a solute and a solvent, wherein said solute comprises at least one of anode active material and cathode active material, wherein said anode active material comprises at least one of organic compounds having a carbonyl group such as benzophenone-, benzoquinone-, dimethyl terephthalate-, and 1,4-diacetylbenzene-based organic compounds, and said cathode active material comprises at least one of amine-, tetrathiafulvalene-, and N,N,N?,N?-tetramethyl-p-phenylenediamine-based organic compounds.
    Type: Application
    Filed: December 13, 2019
    Publication date: May 14, 2020
    Inventors: Seung Mo Oh, Hyun-seung Kim, Youngjin Kim, Taeho Yoon, Ji Heon Ryu, Junsoo Jang
  • Patent number: 10074850
    Abstract: Disclosed are a high-capacity negative electrode active material and a lithium secondary battery including the same. More particularly, the negative electrode active material includes 50 wt % or more of an alkali metavanadate based on the total weight of a negative electrode active material, wherein the alkali metavanadate has a crystalline phase or an amorphous phase, and a composition of formula AVO3.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: September 11, 2018
    Assignees: LG Chem, Ltd., Seoul National University R&DB Foundation
    Inventors: Jihyun Kim, Jae Hyun Lee, Oh Byong Chae, Seung Mo Oh, Jeongbeom Lee, Ji Heon Ryu
  • Patent number: 10026944
    Abstract: Disclosed herein is a stacking or stacking/folding type electrode assembly of a cathode/separator/anode structure, wherein the electrode assembly is constructed in a structure in which tabs (electrode tabs), having no active material applied thereto, protrude from electrode plates constituting the electrode assembly, the electrode tabs are electrically connected to an electrode lead, and the pluralities of electrode tabs are joined to the top and the bottom of the electrode lead at an electrode lead-electrode tabs joint portion such that the resistance difference between electrodes at the electrode lead-electrode tabs joint portion is minimized. Also disclosed is an electrochemical cell including the electrode assembly.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: July 17, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Ji Heon Ryu, Jeong Hee Choi, Kwangho Yoo, Youngjoon Shin
  • Patent number: 9997781
    Abstract: Provided is an anode active material including a transition metal-metaphosphate of Chemical Formula 1: M(PO3)2??<Chemical Formula 1> where M is any one selected from the group consisting of titanium (Ti), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), ruthenium (Ru), palladium (Pd), and silver (Ag), or two or more elements thereof. Since the anode active material of the present invention is stable and has excellent conversion reactivity while including only transition metal and phosphate without using lithium in which the price thereof is continuously increased, the anode active material of the present invention may improve capacity characteristics.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: June 12, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Sang Wook Woo, Ji Heon Ryu, Eun Kyung Kim, Je Young Kim, Sang Jo An, Min Young Hong
  • Patent number: 9979024
    Abstract: Provided is an anode active material including a transition metal-pyrophosphate of Chemical Formula 1 below: M2P2O7??<Chemical Formula 1> where M is any one selected from the group consisting of titanium (Ti), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), ruthenium (Ru), palladium (Pd), and silver (Ag), or two or more elements thereof. Since the anode active material of the present invention is stable and has excellent conversion reactivity while including only transition metal and phosphate without using lithium in which the price thereof is continuously increased, the anode active material of the present invention may improve capacity characteristics.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: May 22, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Sang Wook Woo, Ji Heon Ryu, Eun Kyung Kim, Je Young Kim, Sang Jo An, Min Young Hong
  • Patent number: 9705112
    Abstract: Disclosed herein is a secondary battery constructed in a structure in which an electrode assembly having a cathode/separator/anode arrangement is mounted in a battery case made of a laminate sheet including a resin layer and a metal layer, electrode tabs of the electrode assembly are coupled to corresponding electrode leads, and the electrode assembly is sealed in the battery case while electrode leads are exposed to the outside of the battery case, wherein a protective film is attached to coupling regions between the electrode tabs and the electrode leads for sealing the coupling regions between the electrode tabs and the electrode leads. The secondary battery according to the present invention is constructed in a structure in which the coupling regions are sealed by the protective film, unlike a conventional secondary battery constructed in a structure in which the coupling regions between the electrode tabs and the electrode leads are exposed in the battery case.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: July 11, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Youngjoon Shin, Min Su Kim, Junill Yoon, Ji Heon Ryu, Jeong Hee Choi, Seung-Jin Yang
  • Patent number: 9419283
    Abstract: Provided is a non-aqueous lithium secondary battery comprising an electrode assembly composed of a cathode, an anode, and a separator interposed between the cathode and anode, wherein the cathode and anode have an electrode material containing an active material applied on a current collector, a non-aqueous electrolyte containing a lithium salt, hydrophobic inactive-particles (also, referred to as “hydrophobic particles”) included in the electrode material, and a battery case sealing all the constituent components. Upon adding hydrophobic inactive-particles to the electrode material in a non-aqueous lithium secondary battery, absorption and inflow of water into the electrode material during the battery production is effectively inhibited such as to prevent side reactions caused by water inside the battery, thereby exhibiting improvement in the high-temperature storage characteristics of the battery.
    Type: Grant
    Filed: August 4, 2007
    Date of Patent: August 16, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Ji Heon Ryu, Jung Eun Hyun, Eun Ju Lee, Hanho Lee
  • Publication number: 20160233536
    Abstract: The provided are an electrolyte for redox flow battery and a redox flow battery comprising the same, wherein the electrolyte for redox flow battery comprises a solute and a solvent, wherein said solute comprises at least one of anode active material and cathode active material, wherein said anode active material comprises at least one of organic compounds having a carbonyl group such as benzophenone-, benzoquinone-, dimethyl terephthalate-, and 1,4-diacetylbenzene-based organic compounds, and said cathode active material comprises at least one of amine-, tetrathiafulvalene-, and N,N,N?,N?-tetramethyl-p-phenylenediamine-based organic compounds.
    Type: Application
    Filed: October 10, 2014
    Publication date: August 11, 2016
    Inventors: Seung Mo Oh, Hyun-seung Kim, Youngjin Kim, Taeho Yoon, Ji Heon Ryu, Junsoo Jang
  • Patent number: 9385399
    Abstract: Disclosed herein is a secondary battery having a mechanical connection sensor, as a safety device, fixed to the outer surface of a prismatic or pouch-shaped battery cell while the mechanical connection sensor is set to OFF. The mechanical connection sensor is connected in series with a resistor having a predetermined resistance value and with a cathode and an anode of the battery cell. When the battery cell swells to a critical value or more due to the abnormal operation of the battery cell, the mechanical connection sensor is turned ON, and therefore, the mechanical connection sensor conducts with the result that the electrical energy of the battery cell is consumed at the resistor. In the secondary battery having the safety device according to the present invention, when the battery swells due to the abnormal response of the battery, energy accumulated in the battery is forcibly consumed, unlike a conventional battery that merely intercepts the current.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: July 5, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Ji Heon Ryu, Jin Woong Ha, Jeong Hee Choi, Youngjoon Shin
  • Patent number: 9350016
    Abstract: In an aspect, a composite anode active material including a lithium titanium oxide; and phosphates, a method of preparing the composite anode active material, and a lithium battery including the composite anode active material is provided.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: May 24, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Joa-Young Jeong, Ji-Heon Ryu, Gwang-Jin Lee, Jong-Uk Kim
  • Patent number: 9343714
    Abstract: Disclosed herein is a secondary battery including two or more stacking-folding type cells (‘unit cells’) manufactured by winding small-sized electrode assemblies (‘bicells’) constructed in a stacking type structure in which electrodes having the same polarity are located at opposite sides of each electrode assembly and small sized electrode assemblies (‘full cells’) constructed in a stacking type structure in which electrodes having different polarities are located at opposite sides of each electrode assembly using a long separator sheet, wherein the unit cells are mounted in a battery case, each unit cell has one or more electrode terminals protruding from each end of each unit cell, and the unit cells are mounted in a receiving part of the battery case such that the unit cells are arranged in a stacking arrangement structure or a plane arrangement structure while the electrode terminals of the unit cells are connected with each other.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: May 17, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Kwangho Yoo, Ji Heon Ryu, Hyunwoo Park
  • Patent number: 9269951
    Abstract: Provided is a non-aqueous electrolyte-based, high-power lithium secondary battery having a long service life and superior safety at both room temperature and high temperature, even after repeated high-current charging and discharging. The battery comprises a mixture of a lithium/manganese spinel oxide having a substitution of a manganese (Mn) site with a certain metal ion and a lithium/nickel/cobalt/manganese composite oxide, as a cathode active material.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: February 23, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Ji Heon Ryu, Min Su Kim, Jung Eun Hyun, Jaepil Lee, Eun Ju Lee, Youngjoon Shin
  • Patent number: 9263739
    Abstract: In an aspect, a composite anode active material including lithium titanium oxide particles; and a TiN, and TiN a method of preparing the composite anode active material, and a lithium battery including the composite anode active material is provided.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: February 16, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Joa-Yong Jeong, Ji-Heon Ryu
  • Patent number: 9263738
    Abstract: Provided is a non-aqueous electrolyte-based, high-power lithium secondary battery having a long service life and superior safety at both room temperature and high temperature, even after repeated high-current charging and discharging. The battery comprises a cathode active material composed of a mixture of lithium/manganese spinel oxide and lithium/nickel/cobalt/manganese composite oxide wherein the cathode active material exhibits the life characteristics that the capacity at 300 cycles is more than 70% relative to the initial capacity, in the provision of satisfying the condition (i) regarding the particle size and the condition (ii) regarding the mixing ratio.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: February 16, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Ji Heon Ryu, Min Su Kim, Jung Eun Hyun, Jaepil Lee, Eun Ju Lee, Youngjoon Shin
  • Patent number: 9246154
    Abstract: Disclosed herein is a stacking or stacking/folding type electrode assembly of a cathode/separator/anode structure, wherein the electrode assembly is constructed in a structure in which tabs (electrode tabs), having no active material applied thereto, protrude from electrode plates constituting the electrode assembly, the electrode tabs are electrically connected to an electrode lead, and the pluralities of electrode tabs are joined to the top and the bottom of the electrode lead at an electrode lead-electrode tabs joint portion such that the resistance difference between electrodes at the electrode lead-electrode tabs joint portion is minimized. Also disclosed is an electrochemical cell including the electrode assembly.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: January 26, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Ji Heon Ryu, Jeong Hee Choi, Kwangho Yoo, Youngjoon Shin
  • Publication number: 20150380717
    Abstract: Disclosed herein is a stacking or stacking/folding type electrode assembly of a cathode/separator/anode structure, wherein the electrode assembly is constructed in a structure in which tabs (electrode tabs), having no active material applied thereto, protrude from electrode plates constituting the electrode assembly, the electrode tabs are electrically connected to an electrode lead, and the pluralities of electrode tabs are joined to the top and the bottom of the electrode lead at an electrode lead-electrode tabs joint portion such that the resistance difference between electrodes at the electrode lead-electrode tabs joint portion is minimized. Also disclosed is an electrochemical cell including the electrode assembly.
    Type: Application
    Filed: September 3, 2015
    Publication date: December 31, 2015
    Applicant: LG Chem, Ltd.
    Inventors: Ji Heon Ryu, Jeong Hee Choi, Kwangho Yoo, Youngjoon Shin
  • Publication number: 20150318541
    Abstract: Disclosed are a high-capacity negative electrode active material and a lithium secondary battery including the same. More particularly, the negative electrode active material includes 50 wt % or more of an alkali metavanadate based on the total weight of a negative electrode active material, wherein the alkali metavanadate has a crystalline phase or an amorphous phase, and a composition of formula AVO3.
    Type: Application
    Filed: March 3, 2014
    Publication date: November 5, 2015
    Applicants: SNU R&DB FOUNDATION, LG CHEM, LTD.
    Inventors: Jihyun Kim, Jae Hyun Lee, Oh Byong Chae, Seung Mo Oh, Jeongbeom Lee, Ji Heon Ryu
  • Patent number: 9034521
    Abstract: Provided is an anode material for an electrode mix comprising a carbon material and a lithium titanium oxide (LTO), wherein a ratio of an average particle size of LTO relative to that of the carbon material is in a range of 0.1 to 20%, and LTO is distributed mainly on a surface of the carbon material. The anode material of the present invention can prevent excessive formation of a SEI film, and is of a high capacity due to a high energy density and exhibits excellent output characteristics and rate characteristics. Further, it has superior electrolyte wettability which consequently results in improved battery performance and life characteristics.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: May 19, 2015
    Assignee: LG CHEM, LTD.
    Inventors: Eun Ju Lee, Ji Heon Ryu, Inchul Kim, HanHo Lee