Patents by Inventor Chang Won YOON

Chang Won YOON 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: 9214692
    Abstract: Provided is poly(benzimidazole-co-benzoxazole) having polybenzimidazole to which benzoxazole units are introduced, as a polymer electrolyte material. The polymer electrolyte material has both high proton conductivity and excellent mechanical properties even when it is obtained by in-situ phosphoric acid doping. The polymer electrolyte material may substitute for the conventional phosphoric acid-doped polybenzimidazole in a polymer electrolyte membrane fuel cell, particularly in a high-temperature polymer electrolyte membrane fuel cell.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: December 15, 2015
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Hyoung-Juhn Kim, Eun Ae Cho, Jong Hyun Jang, Dae Ki Choi, Chang Won Yoon, Suk-Woo Nam, Dirk Henkensmeier, Tae Hoon Lim
  • Publication number: 20150303507
    Abstract: By forming a structure wherein an oxygen ionic conductor or a mixed ionic-electronic conductor (MIEC) on a cathode surface is not covered by a molten carbonate electrolyte using an oxygen ionic conductor or a mixed ionic-electronic conductor having poor wettability on the molten carbonate electrolyte, a new electrochemical reaction site may be provided in addition to that provided by the molten carbonate electrolyte. As a result, cell performance, particularly cathode performance, can be improved even at low operation temperatures (e.g., 500-600° C.).
    Type: Application
    Filed: November 23, 2014
    Publication date: October 22, 2015
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Sung Pil YOON, Suk Woo NAM, Chang Won YOON, Tae Hoon LIM, Dae Ki CHOI, Sun-Hee CHOI, Jonghee HAN, Hyung Chul HAM, Hoang Viet Phuc Nguyen
  • Publication number: 20140335442
    Abstract: Provided is a method for preparing nickel-aluminum alloy powder at low temperature, which is simple and economical and is capable of solving the reactor corrosion problem. The method for preparing nickel-aluminum alloy powder at low temperature includes: preparing a powder mixture by mixing nickel powder and aluminum powder in a reactor and adding aluminum chloride into the reactor (S1); vacuumizing the inside of the reactor and sealing the reactor (S2); and preparing nickel-aluminum alloy powder by heat-treating the powder mixture in the sealed reactor at low temperature (S3).
    Type: Application
    Filed: October 1, 2013
    Publication date: November 13, 2014
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Hyung Chul HAM, Shin Ae Song, Seong Cheol Jang, Yong Min Kim, Jonghee Han, Hyoung-Juhn Kim, Tae Hoon Lim, Suk Woo Nam, Sung Pil Yoon, Chang Won Yoon, Yeong Cheon Kim
  • Publication number: 20140329169
    Abstract: Provided are a hydroxyl group-containing sulfonated polyethersulfone copolymer, a method for preparing the same, a polymer electrolyte membrane for fuel cell, and a membrane electrode assembly including the same. More particularly, provided are a hydroxyl group-containing sulfonated polyethersulfone electrolyte membrane and a membrane electrode assembly including the same, which are applied to a fuel cell to provide significantly higher ion conductivity as compared to the sulfonated polymer electrolyte membranes according to the related art. The hydroxyl group-containing sulfonated polyethersulfone copolymer electrolyte membrane shows significantly higher ion conductivity under various temperature and humidity conditions as compared to the sulfonated polymer electrolyte membranes according to the related art. Therefore, it is expected that the hydroxyl group-containing sulfonated polyethersulfone copolymer substitutes for expensive fluoropolymer electrolyte membranes such as Nafion.
    Type: Application
    Filed: April 28, 2014
    Publication date: November 6, 2014
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Hyoung-Juhn KIM, Yeon Hye KWON, Jun Young HAN, Hyung Chul HAM, Jong Hyun JANG, Suk Woo NAM, Eun Ae CHO, Sung Jong YOO, Chang Won YOON
  • Publication number: 20130336826
    Abstract: Provided is a fluid pumping device, and more particularly, a fluid pumping device capable of being used in fuel cell systems and the like and spatially separating a fluid temporary storage unit through which a fluid at high temperature passes from a pump, thereby maintaining the durability of the pump, facilitating replacement and management, and achieving a reduction in weight.
    Type: Application
    Filed: March 15, 2013
    Publication date: December 19, 2013
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Yong Min KIM, Yeong Cheon KIM, Chang Won YOON, Suk Woo NAM, Jonghee HAN, Seong Ahn HONG, Sung Pil YOON, Hyung Chul HAM
  • Publication number: 20120231364
    Abstract: Provided is a cathode for molten carbonate fuel cells, including a porous nickel-based electrode containing nickel particles, and metal particles coated on the electrode, wherein at least a part of the metal particles are attached to the surface of the nickel particles. A method for preparing the same is also provided. The cathode for molten carbonate fuel cells accelerates the cathodic oxygen reduction and reduces polarization resistance occurring at the cathode, thereby providing a fuel cell with improved performance even at low temperature. Additionally, it is possible to improve the service life of a molten carbonate fuel cell due to such low operation temperature.
    Type: Application
    Filed: January 19, 2012
    Publication date: September 13, 2012
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jong Hee HAN, Shin Ae SONG, Sung Pil YOON, Suk Woo NAM, Tae Hoon LIM, In Hwan OH, Dae Ki CHOI, Seong Ahn HONG, Chang Won YOON