Patents by Inventor Seong Mu Jo

Seong Mu Jo 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: 10344404
    Abstract: The present disclosure relates to a preparation method for lowering a production cost of a high performance carbon fiber using a nanocarbon composite carbon fiber precursor fiber crosslinked by electron beam.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: July 9, 2019
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Seong-Mu Jo, Sung-Ho Lee, Han-Ik Joh, Se-Joon Park, Hyeon-uk Yeo, Bon-Cheol Ku
  • Patent number: 9994488
    Abstract: An ultrafine continuous fibrous ceramic filter, which comprises a filtering layer of a fibrous porous body, wherein the fibrous porous body comprises continuous ultrafine fibers of metal oxide which are randomly arranged and layered, and powdery nano-alumina incorporated into the ultrafine fibers or coated thereon, the ultrafine fibers being obtained by electrospinning a spinning solution comprising a metal oxide precursor sol-gel solution, and optionally, a polymer resin, and sintering the electrospun fibers, in which the ultrafine fibers have an average diameter of 10˜500 nm, and the fibrous porous body has a pore size of maximum frequency ranging from 0.05 to 2 ?m, exhibits high filtration efficiency at a high flow rate, and can be regenerated.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: June 12, 2018
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Seong Mu Jo, Dong Young Kim, Sung-Yeon Jang, Jeong Joo Choo
  • Publication number: 20180090769
    Abstract: Prepared is a halogenated carbon material, which reduces a carbon material having an oxygen-based functional group by introducing a halogen gas or a mixed gas of a halogen gas and an inert gas into the carbon material having an oxygen-based functional group, and dopes a halogen into the carbon material. The resulting halogenated carbon material includes one or more selected from a group consisting of C—Y2 and C—Y3, and may be suitably for an energy device such as a fuel cell, a lithium ion battery, and a solar cell.
    Type: Application
    Filed: September 26, 2017
    Publication date: March 29, 2018
    Inventors: Han Ik JO, Cheol-Ho LEE, Gil Seong KANG, Younki LEE, Sung Ho LEE, Seong Mu JO, Sang Jun YOUN
  • Publication number: 20160348283
    Abstract: The present disclosure relates to a preparation method for lowering a production cost of a high performance carbon fiber using a nanocarbon composite carbon fiber precursor fiber crosslinked by electron beam.
    Type: Application
    Filed: May 23, 2016
    Publication date: December 1, 2016
    Inventors: Seong-Mu JO, Sung-Ho LEE, Han-Ik Joh, Se-Joon Park, Hyeon-uk YEO, Bon-Cheol KU
  • Publication number: 20160351876
    Abstract: A polyolefin separator having an heat-resistant ultrafine fibrous layer and a secondary battery using the same, in which the separator has a shutdown function, low thermal contraction characteristics, thermal endurance, excellent ionic conductivity, excellent cycling characteristics at the time of battery construction, and excellent adhesion with an electrode. The present invention adopts a very simple and easy process to form an ultrafine fibrous layer through an electrospinning process, and at the same time, to remove solvent and to form pores. Accordingly, the separator of the present invention is useful particularly for electrochemical devices used in a hybrid electric automobile, an electric automobile, and a fuel cell automobile, requiring high thermal endurance and thermal stability.
    Type: Application
    Filed: June 1, 2016
    Publication date: December 1, 2016
    Inventors: Seong Mu Jo, Dong Young Kim, Byung Doo Chin
  • Publication number: 20160244373
    Abstract: An ultrafine continuous fibrous ceramic filter, which comprises a filtering layer of a fibrous porous body, wherein the fibrous porous body comprises continuous ultrafine fibers of metal oxide which are randomly arranged and layered, and powdery nano-alumina incorporated into the ultrafine fibers or coated thereon, the ultrafine fibers being obtained by electrospinning a spinning solution comprising a metal oxide precursor sol-gel solution, and optionally, a polymer resin, and sintering the electrospun fibers, in which the ultrafine fibers have an average diameter of 10˜500 nm, and the fibrous porous body has a pore size of maximum frequency ranging from 0.05 to 2 ?m, exhibits high filtration efficiency at a high flow rate, and can be regenerated.
    Type: Application
    Filed: May 4, 2016
    Publication date: August 25, 2016
    Inventors: Seong Mu JO, Dong Young KIM, Sung-Yeon JANG, Jeong Joo CHOO
  • Patent number: 9368287
    Abstract: A dye-sensitized solar cell having improved photoelectric conversion characteristic includes a metal oxide layer having dye-adsorbed metal oxide nanoparticles, wherein the metal oxide nanoparticles are formed by electrospinning a mixed solution of a metal oxide precursor and a polymer into ultrafine composite fibers, and thermally compressing and sintering the ultrafine composite fibers.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: June 14, 2016
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Seong-Mu Jo, Dong-Young Kim, Sung-Yeon Jang, Nam-Gyu Park, Byoung-Hong Yi
  • Patent number: 9180412
    Abstract: An ultrafine fiber-based composite separator comprising a fibrous porous body which comprises ultrafine metal oxide/polymer composite fibers, or ultrafine metal oxide fibers and a polymer resin coating layer formed on the surface thereof, the ultrafine fibers being continuously randomly arranged and layered, and obtained by electrospinning a metal oxide precursor sol-gel solution or a mixture of a metal oxide precursor sol-gel solution and a polymer resin solution, wherein the surface of the metal oxide/polymer composite fibers has a uniform mixing composition of the metal oxide and the polymer resin, in which the separator has a heat shrinkage rate at 150˜250° C. of 10% or less and does not break down due to melting at a temperature of 200° C. or lower, has low heat shrinkage rate, and superior heat resistance and ionic conductivity, being capable of providing improved cycle and power properties when used in manufacturing a battery.
    Type: Grant
    Filed: April 18, 2011
    Date of Patent: November 10, 2015
    Inventors: Seong Mu Jo, Dong Young Kim, Sung-Yeon Jang
  • Patent number: 9175424
    Abstract: Provided is a method of preparing cellulose fiber and carbon fiber by recycling industrial wood waste, wherein the carbon fiber is prepared by preparing high purity cellulose pulp by using, as a raw material, wood waste generated by manufacturers of pulp, furniture and other industrial products from wood and by eliminating resin and lignin impregnated in the wood waste through pulping and bleaching of the raw material, by preparing cellulose fiber by directly dissolving the prepared pulp in a cellulose solvent, and then by performing stabilizing and carbonizing with the cellulose fiber as a precursor.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: November 3, 2015
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jun Yeon Hwang, In Su Seo, Kil Young Park, Bon Cheol Ku, Seong Mu Jo, Hun Su Lee
  • Patent number: 9133549
    Abstract: The present invention provides a gas sensor, including: a sensor substrate provided with an electrode; and a thin layer of sensor material formed by spraying a solution in which metal oxide nanoparticles are dispersed onto the sensor substrate. The gas sensor is advantageous in that a sensor material is formed into a porous thin layer containing metal oxide nanoparticles having a large specific surface area, thus realizing high sensitivity on the ppb scale and a high reaction rate. Further, the gas sensor is advantageous in that it can be manufactured at room temperature, and the thickness of a sensor material can be easily adjusted by adjusting the spray time, so that a thin gas sensor or a thick gas sensor can be easily manufactured.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: September 15, 2015
    Assignees: AMOGREENTECH CO., LTD., Korea Institute of Science and Technology
    Inventors: Il-Doo Kim, Dong-Young Kim, Sung-Yeon Jang, Seong-Mu Jo, Jae-Min Hong, Yun-Seok Lee, Sung-Chul Yang
  • Publication number: 20150078983
    Abstract: Provided is a method of preparing cellulose fiber and carbon fiber by recycling industrial wood waste, wherein the carbon fiber is prepared by preparing high purity cellulose pulp by using, as a raw material, wood waste generated by manufacturers of pulp, furniture and other industrial products from wood and by eliminating resin and lignin impregnated in the wood waste through pulping and bleaching of the raw material, by preparing cellulose fiber by directly dissolving the prepared pulp in a cellulose solvent, and then by performing stabilizing and carbonizing with the cellulose fiber as a precursor.
    Type: Application
    Filed: April 11, 2014
    Publication date: March 19, 2015
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jun Yeon HWANG, In Su SEO, Kil Young PARK, Bon Cheol KU, Seong Mu JO, Hun Su LEE
  • Publication number: 20140329131
    Abstract: A polyolefin separator having an heat-resistant ultrafine fibrous layer and a secondary battery using the same, in which the separator has a shutdown function, low thermal contraction characteristics, thermal endurance, excellent ionic conductivity, excellent cycling characteristics at the time of battery construction, and excellent adhesion with an electrode. The present invention adopts a very simple and easy process to form an ultrafine fibrous layer through an electrospinning process, and at the same time, to remove solvent and to form pores. Accordingly, the separator of the present invention is useful particularly for electrochemical devices used in a hybrid electric automobile, an electric automobile, and a fuel cell automobile, requiring high thermal endurance and thermal stability.
    Type: Application
    Filed: June 20, 2014
    Publication date: November 6, 2014
    Inventors: Seong-Mu Jo, Dong-Young Kim, Byung-Doo Chin
  • Patent number: 8815432
    Abstract: A heat-resisting ultrafine fibrous separator of the present invention is prepared by an electrospinning process, formed of ultrafine fibers of heat-resisting polymer resin having a melting point more than 1800 C or not having the melting point, or ultrafine fibers of polymer resin capable of swelling in an electrolyte, together with the ultrafine fibers of heat-resisting polymer resin. Also, polyolefine fine particles providing a shutdown function are dispersed in the heat-resisting resin or the polymer resin capable of swelling in the electrolyte. The heat-resisting ultrafine fibrous separator of the present invention has the shutdown function, low thermal contraction, thermal endurance, excellent ionic conductivity and excellent adhesive property with an electrode, so a battery having excellent cycling characteristics, and having high-energy density and high capacity can be prepared.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: August 26, 2014
    Assignee: Korea Institute of Science and Technology
    Inventors: Seong-Mu Jo, Dong-Young Kim, Byung-Doo Chin
  • Patent number: 8691325
    Abstract: A dye-sensitized solar cell comprising a semiconductor electrode comprising electrospun ultra-fine titanium dioxide fibers and fabrication method thereof are disclosed. The dye-sensitized solar cell comprises a semiconductor electrode comprising an electrospun ultra-fine fibrous titanium dioxide layer, a counter electrode and electrolyte interposed therebetween. A non-liquid electrolyte such as polymer gel electrolyte or the like having low fluidity, as well as the liquid electrolyte, can be easily infiltrated thereinto. In addition, electrons can be effectively transferred since titanium dioxide crystals are one-dimensionally arranged.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: April 8, 2014
    Assignee: Korean Institute of Science and Technology
    Inventors: Dong-Young Kim, Seong-Mu Jo, Wha-Seop Lee, Mi-Yeon Song, Do-Kyun Kim
  • Publication number: 20140076797
    Abstract: A fiber-based filter includes a filter-based porous body having a most frequent pore size from 0.1 ?m to 2 ?m in a pore size distribution, in which a ultra-fine fiber is continuously and randomly disposed, and a filtration layer having a nanonet layer having a most frequent pore size from 1 nm to 100 nm in the pore size distribution, in which an anisotropic nanomaterial is disposed. The fiber-based filter may have excellent filtration efficiency capable of removing even super-fine particles such as virus and heavy metal, and may show high permeation flow rate due to low loss of pressure during the filtration, and may be usefully used as an air and water-treatment filter.
    Type: Application
    Filed: February 11, 2013
    Publication date: March 20, 2014
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Seong-Mu JO, Dong-Young KIM
  • Patent number: 8518178
    Abstract: Disclosed is: a single crystalline silicon carbide nanofiber having improved thermal and mechanical stability as well as a large specific surface area which is applicable to a system for purifying exhaust gas, silicon carbide fiber filter, diesel particulate filter having a high temperature stability and may be used in the form of nanostructures such as nanorods and nanoparticles.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: August 27, 2013
    Assignee: Korea Institute of Science and Technology
    Inventors: Il Doo Kim, Seung Hun Choi, Seong Mu Jo, Jae-Min Hong
  • Patent number: 8519045
    Abstract: Disclosed are a graphene composite nanofiber and a preparation method thereof. The graphene composite nanofiber is produced by dispersing graphenes to at least one of a surface and inside of a polymer nanofiber or a carbon nanofiber having a diameter of 1˜1000 nm, and the graphenes include at least one type of monolayer graphenes, and multilayer graphenes having a thickness of 10 nm or less. The graphene composite nanofiber can be applied to various industrial fields, e.g., a light emitting display, a micro resonator, a transistor, a sensor, a transparent electrode, a fuel cell, a solar cell, a secondary cell, and a composite material, owing to a unique structure and property of graphene.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: August 27, 2013
    Assignee: Korea Institute of Science and Technology
    Inventors: Sung-Yeon Jang, Ho Seok Park, Seong Mu Jo, Dong Young Kim, Won Hi Hong, Sang Yup Lee, Tae Jung Park, Bong Gill Choi
  • Patent number: 8486584
    Abstract: Disclosed is a method for fabricating a carbon material, by which carbon fibers or carbon tubes, particularly branched carbon fibers or carbon tubes, are obtained via a so-called self-growing process without using external carbon sources. The carbon material obtained by the method has a large specific surface area and further includes a metal catalyst, and thus may be used in cell materials for a fuel cell or secondary battery, hydrogen storage devices, capacitors, solar cells, display panel or the like.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: July 16, 2013
    Assignee: Korea Institute of Science and Technology
    Inventors: Heung Yong Ha, Han-ik Joh, Seong Mu Jo, Soo-Kil Kim, Suk-Woo Nam, In Hwan Oh, Tae Hoon Lim, Seong Ahn Hong, Sung-Yeon Jang
  • Patent number: 8243420
    Abstract: A porous conducting metal oxide electrode prepared by depositing a porous conducting metal oxide film containing a conducting metal oxide film layer having a network structure of nanofibers, containing nanograins or nanoparticles, on at least one surface of a current collector, and a conducting metal oxide coating layer on the network layer of the porous conducting metal oxide through a constant current method or a cyclic voltammetric method; and a high-speed charge/discharge and ultrahigh-capacity supercapacitor using the porous conducting metal oxide electrode are provided.
    Type: Grant
    Filed: August 11, 2008
    Date of Patent: August 14, 2012
    Assignee: Korea Institute of Science and Technology
    Inventors: Il Doo Kim, Jae-Min Hong, Seong Mu Jo, Dong Young Kim
  • Publication number: 20120113565
    Abstract: The present invention discloses an improved electrode for a supercapacitor and a method of preparation thereof. The inventive electrode comprises a collector, a carbon substrate disposed on the collector comprising ultrafine carbon fibers having a specific surface area of at least 200 m2/g (BET) and a d002 value of 0.36 nm or less, and a metal oxide thin layer formed on the carbon substrate. The electrode of the subject invention retains a high specific capacitance during high-speed charging and discharging cycles.
    Type: Application
    Filed: January 16, 2012
    Publication date: May 10, 2012
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Dong Young KIM, Seong Mu JO, Sung-Yeon JANG, Young Rack AHN