Patents by Inventor Duck Rye Chang

Duck Rye Chang 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: 11177502
    Abstract: The method for manufacturing a solid electrolyte using an LLZ material for a lithium-ion battery comprises the steps of: providing a starting material in which lanthanum nitrate [La(NO3)3.6H2O] and zirconium nitrate [ZrO(NO3)2.6H2O] are mixed at a mole ratio of 3:2; forming an aqueous solution by dissolving the starting material; forming a precipitate by putting ammonia, which is a complex agent, and sodium hydroxide, which adjusts the pH of a reactor, into the aqueous solution, mixing the same, and then co-precipitating the mixture; forming a primary precursor powder by cleaning, drying and pulverizing the precipitate; forming a secondary precursor powder by mixing lithium powder [LiOH.H2O] with the primary precursor powder and ball-milling the mixture so as to solidify the lithium; and forming a solid electrolyte powder by heat-treating the secondary precursor powder.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: November 16, 2021
    Assignee: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY
    Inventors: Ho Sung Kim, Tae Won Kim, Duck Rye Chang, Jong Ho Lee, Kyeong Wan Kim, Min Young Kim
  • Patent number: 10886560
    Abstract: The present invention relates to an all-solid-state lithium secondary battery and a method of manufacturing the same. The all-solid-state lithium secondary battery includes a cathode, an anode, and a composite solid electrolyte layer between the cathode and the anode, wherein first and second LLZOs contained respectively in the cathode and the composite solid electrolyte layer are each independently aluminum-doped or undoped LLZO, and the battery of the invention can exhibit improved discharge capacity and cycle characteristics because both the cathode and the composite solid electrolyte layer contain a conductive polymer, a lithium salt and an inorganic ceramic solid electrolyte.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: January 5, 2021
    Assignee: Korea Institute of Industrial Technology
    Inventors: Ho Sung Kim, Min-Young Kim, Seung Hoon Yang, Da-Hye Kim, Kyeong Joon Kim, Seung Woo Choi, Jinsub Lim, Duck Rye Chang
  • Patent number: 10637095
    Abstract: Disclosed is a method of preparing a solid electrolyte, which includes (a) preparing a solid electrolyte precursor slurry by subjecting a mixed solution including a metal precursor solution, containing a lanthanum precursor, a zirconium precursor and an aluminum precursor, a complexing agent, and a pH controller to coprecipitation, (b) preparing a solid electrolyte precursor by washing and drying the solid electrolyte precursor slurry, (c) preparing a mixture by mixing the solid electrolyte precursor with a lithium source, and (d) preparing an aluminum-doped lithium lanthanum zirconium oxide (LLZO) solid electrolyte by calcining the mixture, and which is also capable of adjusting the aluminum content of a starting material to thus control sintering properties and of adjusting the composition of a precursor and a lithium source to thus control the crystal structure, thereby improving the ionic conductivity of the solid electrolyte.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: April 28, 2020
    Assignee: TDL CO., LTD.
    Inventors: Ho Sung Kim, Min-young Kim, Seung Hoon Yang, Jinsub Lim, Duck Rye Chang, Jong Ho Lee
  • Publication number: 20190148771
    Abstract: The method for manufacturing a solid electrolyte using an LLZ material for a lithium-ion battery comprises the steps of: providing a starting material in which lanthanum nitrate [La(NO3)3.6H2O] and zirconium nitrate [ZrO(NO3)2.6H2O] are mixed at a mole ratio of 3:2; forming an aqueous solution by dissolving the starting material; forming a precipitate by putting ammonia, which is a complex agent, and sodium hydroxide, which adjusts the pH of a reactor, into the aqueous solution, mixing the same, and then co-precipitating the mixture; forming a primary precursor powder by cleaning, drying and pulverizing the precipitate; forming a secondary precursor powder by mixing lithium powder [LiOH.H2O] with the primary precursor powder and ball-milling the mixture so as to solidify the lithium; and forming a solid electrolyte powder by heat-treating the secondary precursor powder.
    Type: Application
    Filed: January 16, 2019
    Publication date: May 16, 2019
    Inventors: Ho Sung KIM, Tae Won KIM, Duck Rye CHANG, Jong Ho LEE, Kyeong Wan KIM, Min Young KIM
  • Publication number: 20190051934
    Abstract: The present invention relates to an all-solid-state lithium secondary battery and a method of manufacturing the same. The all-solid-state lithium secondary battery includes a cathode, an anode, and a composite solid electrolyte layer between the cathode and the anode, wherein first and second LLZOs contained respectively in the cathode and the composite solid electrolyte layer are each independently aluminum-doped or undoped LLZO, and the battery of the invention can exhibit improved discharge capacity and cycle characteristics because both the cathode and the composite solid electrolyte layer contain a conductive polymer, a lithium salt and an inorganic ceramic solid electrolyte.
    Type: Application
    Filed: November 15, 2016
    Publication date: February 14, 2019
    Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY
    Inventors: Ho Sung KIM, Min-Young Kim, Seung Hoon YANG, Da-Hye KIM, Kyeong Joon KIM, Seung Woo CHOI, Jinsub LIM, Duck Rye CHANG
  • Publication number: 20180248223
    Abstract: Disclosed is a method of preparing a solid electrolyte, which includes (a) preparing a solid electrolyte precursor slurry by subjecting a mixed solution including a metal precursor solution, containing a lanthanum precursor, a zirconium precursor and an aluminum precursor, a complexing agent, and a pH controller to coprecipitation, (b) preparing a solid electrolyte precursor by washing and drying the solid electrolyte precursor slurry, (c) preparing a mixture by mixing the solid electrolyte precursor with a lithium source, and (d) preparing an aluminum-doped lithium lanthanum zirconium oxide (LLZO) solid electrolyte by calcining the mixture, and which is also capable of adjusting the aluminum content of a starting material to thus control sintering properties and of adjusting the composition of a precursor and a lithium source to thus control the crystal structure, thereby improving the ionic conductivity of the solid electrolyte.
    Type: Application
    Filed: August 23, 2016
    Publication date: August 30, 2018
    Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY
    Inventors: Ho Sung KIM, Min-Young KIM, Seung Hoon YANG, Jinsub LIM, Duck Rye CHANG, Jong Ho LEE
  • Patent number: 10020488
    Abstract: This disclosure synthesizes an anodic composite material Li(LixNiyCozMnwO2+?) of Li2MnO3 series whose theoretical capacity is a level of about 460 mAh/g, and to produce an electrode of a high capacity using the synthesized anodic composite material. Also provided is a method for charging and discharging the electrode. Here, the method for producing an anodic composite material for a lithium secondary battery includes the steps of: mixing a nickel nitrate solution, a manganese nitrate solution, and a cobalt nitrate solution to produce a starting material solution; and mixing the starting material solution with a complexing agent so as to produce an anodic composite material Li(LixNiyCozMnwO2+?) of Li2MnO3 series by means of coprecipitation.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: July 10, 2018
    Assignee: Korea Institute of Industrial Technology
    Inventors: Ho Sung Kim, Sun Woo Yang, Kyeong Wan Kim, Chae Hwan Jeong, Tae Won Kim, Duck Rye Chang, Min Young Kim
  • Publication number: 20160380304
    Abstract: The method for manufacturing a solid electrolyte using an LLZ material for a lithium-ion battery comprises the steps of: providing a starting material in which lanthanum nitrate [La(NO3)3.6H2O] and zirconium nitrate [ZrO(NO3)2.6H2O] are mixed at a mole ratio of 3:2; forming an aqueous solution by dissolving the starting material; forming a precipitate by putting ammonia, which is a complex agent, and sodium hydroxide, which adjusts the pH of a reactor, into the aqueous solution, mixing the same, and then co-precipitating the mixture; forming a primary precursor powder by cleaning, drying and pulverizing the precipitate; forming a secondary precursor powder by mixing lithium powder [LiOH.H2O] with the primary precursor powder and ball-milling the mixture so as to solidify the lithium; and forming a solid electrolyte powder by heat-treating the secondary precursor powder.
    Type: Application
    Filed: June 27, 2014
    Publication date: December 29, 2016
    Inventors: Ho Sung Kim, Tae Won Kim, Duck Rye Chang, Jong Ho Lee, Kyeong Wan Kim, Min Young Kim
  • Patent number: 9478993
    Abstract: The present invention relates to the manufacture of a high capacity electrode by synthesizing an excellent Li2MnO3-based composite material Li(LixNiyCozMnwO2) to improve the characteristics of an inactive Li2MnO3 material with a specific capacity of about 460 mAh/g. Here, a manufacturing method of a cathode material for a lithium secondary battery uses a Li2MnO3-based composite material Li(LixNiyCozMnwO2) by reacting a starting material wherein a nickel nitrate solution, a manganese nitrate solution and a cobalt nitrate solution are mixed, with a complex agent by co-precipitation.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: October 25, 2016
    Assignee: Korea Institute of Industrial Technology
    Inventors: Ho Sung Kim, Ju Hee Kang, Ik Hyun Oh, Seong Jae Boo, Duck Rye Chang, Tae Won Kim, Sung Hee Park, Kyeong Wan Kim
  • Publication number: 20150380720
    Abstract: This disclosure synthesizes an anodic composite material Li(LixNiyCozMnwO2+?) of Li2MnO3 series whose theoretical capacity is a level of about 460 mAh/g, and to produce an electrode of a high capacity using the synthesized anodic composite material. Also provided is a method for charging and discharging the electrode. Here, the method for producing an anodic composite material for a lithium secondary battery includes the steps of: mixing a nickel nitrate solution, a manganese nitrate solution, and a cobalt nitrate solution to produce a starting material solution; and mixing the starting material solution with a complexing agent so as to produce an anodic composite material Li(LixNiyCozMnwO2+?) of Li2MnO3 series by means of coprecipitation.
    Type: Application
    Filed: August 20, 2013
    Publication date: December 31, 2015
    Inventors: Ho Sung Kim, Sun Woo Yang, Kyeong Wan Kim, Chae Hwan Jeong, Tae Won Kim, Duck Rye Chang, Min Young Kim
  • Publication number: 20140306664
    Abstract: The present invention relates to the manufacture of a high capacity electrode by synthesizing an excellent Li2MnO3-based composite material Li(LixNiyCozMnwO2) to improve the characteristics of an inactive Li2MnO3 material with a specific capacity of about 460 mAh/g. Here, a manufacturing method of a cathode material for a lithium secondary battery uses a Li2MnO3-based composite material Li(LixNiyCozMnwO2) by reacting a starting material wherein a nickel nitrate solution, a manganese nitrate solution and a cobalt nitrate solution are mixed, with a complex agent by co-precipitation.
    Type: Application
    Filed: October 19, 2012
    Publication date: October 16, 2014
    Applicant: Korea Institute of Industrial Technology
    Inventors: Ho Sung Kim, Ju Hee Kang, Ik Hyun Oh, Seong Jae Boo, Duck Rye Chang, Tae Won Kim, Sung Hee Park, Kyeong Wan Kim
  • Publication number: 20140287348
    Abstract: The present invention relates to a method for manufacturing unit cells of a solid oxide fuel cell through a process of attaching a fuel electrode reaction layer/electrolyte layer film assembly, manufactured using a tape casting method, onto a fuel electrode support (sintered body) which consists of the unit cells of the solid oxide fuel cell and which is manufactured using a tape casting method, a pressure method, a discharge plasma method, or the like.
    Type: Application
    Filed: December 30, 2011
    Publication date: September 25, 2014
    Applicant: Korea Institute of Industrial Technology
    Inventors: Ho Sung Kim, Ju Hee Kang, Ik Hyun Oh, Duck Rye Chang, Jae Seong Boo, Chae Hwan Jeong, Hyo Shin Kim, Eon Soo Lee
  • Publication number: 20130078551
    Abstract: A manufacturing method for a solid oxide fuel cell (SOFC) unit cell is disclosed. The manufacturing method may include manufacturing an Ni—CeScSZ anode layer; manufacturing a CeScSZ electrolyte layer; manufacturing a gadolinia-doped ceria (GDC) buffer layer; and manufacturing a lanthanum strontium cobalt ferrite (LSCF) cathode layer. Accordingly, an ohmic resistance of electrolyte and a polarization resistance may be reduced and high output may be obtained even at a middle low temperature.
    Type: Application
    Filed: June 24, 2011
    Publication date: March 28, 2013
    Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY
    Inventors: Ho Sung Kim, Young Mi Kim, Ju Hee Kang, Duck Rye Chang, Jong Ho Lee, Chang Seog Kang, Chaehwan Jeong, Jae Hyuk Jang
  • Patent number: 5865960
    Abstract: A photocatalyst for the preparation of hydrogen consisting of a catalytically active ingredient, cesium (Cs), impregnated in a support, K.sub.4 Nb.sub.6 O.sub.17, represented by Formula I as follows:Cs (a) /K.sub.4 Nb.sub.6 O.sub.17wherein a is an amount of the catalytically active ingredient impregnated in the support and has a value of between 0.05 to 5.0% by weight based on total weight of the support. Such a catalyst is prepared by combining K.sub.2 CO.sub.3 with Nb.sub.2 O.sub.5 in a mole ratio of 2:3; sintering the combination at a temperature of about 1,200.degree.-1,300.degree. C. to produce the support, K.sub.4 Nb.sub.6 O.sub.17 ; and impregnating the support with the catalytically active ingredient, Cs. Hydrogen is efficiently produced by illuminating an ultraviolet light on an aqueous solution added with an oxygen-containing organic promoter at a reaction temperature of about 15.degree.-80.degree. C., under a reaction pressure of about 0.1-3.0 atm, in the presence of the photocatalyst.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: February 2, 1999
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Dae Chul Park, Kyeong Hwan Chung, Duck Rye Chang