Patents by Inventor Tae Hoon Lim

Tae Hoon Lim 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: 6824913
    Abstract: The present invention provides an anode for a Molten Carbonate Fuel Cell (MCFC) and a MCFC including the same, particularly an anode for the MCFC coated by a porous ceramic film, when the invention is used, the wettability of the anode to the molten carbonate used as the electrolyte for the MCFC and the amount of impregnated electrolyte will be greatly improved, and thus is very useful in viewpoint that it can prevent any electrolyte loss that is often observed in the long periods of operation of the MCFC, and maintain a high stability of the cell for an extended period of time, compared with the conventional cell. Also, the present invention itself is applicable to an electrode made of Ni-based alloys or metal compounds, which is expected to be competent MCFC materials nowadays, as well as the electrode made of Ni, Ni—Cr and Ni—Al alloy used in the present invention.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: November 30, 2004
    Assignee: Korea Institute of Science and Technology
    Inventors: Seong-Ahn Hong, In-Hwan Oh, Tae-Hoon Lim, Suk-Woo Nam, Heung-Yong Ha, Sung Pil Yoon, Jonghee Han, Beom Seok Kang
  • Publication number: 20040221684
    Abstract: In a method for manufacturing Ni—Al alloy powders for electrode materials of fuel cells, in which, using aluminum chloride (AlCl3) as a catalyst, powders of Ni and Al, that have been used as electrode materials, are chemically reacted with each other to diffuse the Al into the Ni powders, so that Ni—Al alloy powders can be manufactured at a low temperature below fusion points of Ni and Al while maintaining a shape and a size of the existing Ni powders as they are, thus providing a manufacturing process of Ni—Al alloy powders that is simple, economical, compatible in working, and ready for scale-up, and in which a conventional manufacturing process of electrode based on Ni is used as it is, so that large sized electrode is manufactured.
    Type: Application
    Filed: October 29, 2003
    Publication date: November 11, 2004
    Applicant: Korea Institute of Science and Technology
    Inventors: Suk Woo Nam, Anatoli Maganiouk, Seong-Ahn Hong, In-Hwan Oh, Tae Hoon Lim, Heung Yong Ha, Sung Pil Yoon, Jonghee Han, Eun Ae Cho
  • Publication number: 20030113608
    Abstract: A perforated gas-distributing plate for compact fuel cells made of a metal material such as stainless steel on which gas flow paths are formed by an etching process, and a separator plate manufactured using the gas-distributing plate are disclosed.
    Type: Application
    Filed: October 30, 2002
    Publication date: June 19, 2003
    Applicant: Korea Institute of Science and Technology
    Inventors: Seong-Ahn Hong, In-Hwan Oh, Tae Hoon Lim, Suk Woo Nam, Heung Yong Ha, Sung Pil Yoon, Jong Hee Han, Yeong Cheon Kim, Hyung Joon Choi
  • Publication number: 20030096155
    Abstract: The present invention provides an anode for a Molten Carbonate Fuel Cell (MCFC) and a MCFC including the same, particularly an anode for the MCFC coated by a porous ceramic film, when the invention is used, the wettability of the anode to the molten carbonate used as the electrolyte for the MCFC and the amount of impregnated electrolyte will be greatly improved, and thus is very useful in viewpoint that it can prevent any electrolyte loss that is often observed in the long periods of operation of the MCFC, and maintain a high stability of the cell for an extended period of time, compared with the conventional cell. Also, the present invention itself is applicable to an electrode made of Ni-based alloys or metal compounds, which is expected to be competent MCFC materials nowadays, as well as the electrode made of Ni, Ni—Cr and Ni—Al alloy used in the present invention.
    Type: Application
    Filed: March 14, 2002
    Publication date: May 22, 2003
    Applicant: Korea Institute of Science and Technology
    Inventors: Seong-Ahn Hong, In-Hwan Oh, Tae-Hoon Lim, Suk-Woo Nam, Heung-Yong Ha, Sung Pil Yoon, Jonghee Han, Beom Seok Kang
  • Publication number: 20030082436
    Abstract: Disclosed is an electrode having a novel configuration for improving performance of the electrode used in solid-oxide fuel cells, sensors and solid state devices, in which the electrode providing electron conductivity is coated with ion conductive ceramic ceria film, enabling an electron conductive path and an ion conductive path to be independently and continuously maintained, and additionally extending a triple phase boundary where electrode/electrolyte/gas are in contact, and a method for manufacturing the same. The electrode is manufactured by coating the prefabricated electrode for use in a SOFC or sensor with a porous oxygen ion conductive ceramic ceria film by a sol-gel method, whereby the electron conductive material and ion conductive material exist independently, having a new microstructure configuration with a greatly extended triple phase boundary, thus improving electrode performance.
    Type: Application
    Filed: June 3, 2002
    Publication date: May 1, 2003
    Applicant: Korea Institute of Science and Technology
    Inventors: Seong-Ahn Hong, In-Hwan Oh, Tae-Hoon Lim, Suk-Woo Nam, Heung-Yong Ha, Sung Pil Yoon, Jonghee Han
  • Patent number: 6544676
    Abstract: An internal reforming molten carbonate fuel cell having a membrane for intercepting carbonate vapor and hydrated vapor is disclosed. The intercepting membrane is made from nickel or nickel alloy which has a high electrical conductivity, corrosion resistant property in an anode environment, and a low affinity for the carbonate vapor. Due to the presence of the intercepting membrane, the transfer of the carbonate vapors and hydrated vapors to the internal reforming catalyst is markedly retarded to prolong the catalytic activity. As a result, a longer operating molten carbonate fuel cell can be obtained.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: April 8, 2003
    Assignee: KIST (Korea Institute of Science and Technology
    Inventors: Tae Hoon Lim, Heung Yong Ha, Suk Woo Nam, In Hwan Oh, Seong Ahn Hong, Hyeung Dae Moon, Ho In Lee
  • Publication number: 20010026881
    Abstract: An internal reforming molten carbonate fuel cell having a membrane for intercepting carbonate vapor and hydrated vapor is disclosed. The intercepting membrane is made from nickel or nickel alloy which has a high electrical conductivity, corrosion resistant property in an anode environment, and a low affinity for the carbonate vapor. Due to the presence of the intercepting membrane, the transfer of the carbonate vapors and hydrated vapors to the internal reforming catalyst is markedly retarded to prolong the catalytic activity. As a result, a longer operating molten carbonate fuel cell can be obtained.
    Type: Application
    Filed: January 16, 2001
    Publication date: October 4, 2001
    Applicant: KIST ( Korea Institute of Science and Technology)
    Inventors: Tae Hoon Lim, Heung Yong Ha, Suk Woo Nam, In Hwan Oh, Seong Ahn Hong, Hyeung Dae Moon, Ho In Lee
  • Patent number: 6296972
    Abstract: A LiCoO2-coated NiO cathode for molten carbonate fuel cell is provided, wherein the cathode is prepared by dissolving a stoichiometric amount of lithium salts and cobalt salts in a solvent with or without adding a chelating agent to give a sol or a mixed solution, impregnating a NiO electrode for MCFC into the sol or the mixed solution, and drying and calcining the resulting electrode. By using the cathode of the invention, lifetime of the cell can be extended by two or more times while maintaining cell performance.
    Type: Grant
    Filed: April 23, 1999
    Date of Patent: October 2, 2001
    Assignee: Korea Institute of Science and Technology
    Inventors: Seong Ahn Hong, In-Hwan Oh, Tae Hoon Lim, Suk Woo Nam, Hyung Joon Choi, Heung Yong Ha, Seung-Goo Kim
  • Patent number: 6153257
    Abstract: The present invention relates to a cathode, which can be used in molten carbonate fuel cells (hereinafter, referred to as an "MCFC"), and a process for preparing the same. In such a cathode, NiO, which is inexpensive and has relatively good electrochemical performance, has been mainly used. However, NiO has a relatively large solubility in electrolytes of an MCFC which causes the cells to be short circuited, thereby shortening the life of the cells. However, according to the present invention, a cathode having a longer life than common cathodes for MCFC can be prepared by adding alkaline earth metal oxides, which are basic substances, to NiO, the main material of the cathodes, or impregnating an Ni plate with a solution of the alkaline earth metal oxides, to reduce the solubility of the NiO while maintaining its performance as the cathode.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: November 28, 2000
    Assignee: Korea Institute of Science and Technology
    Inventors: Seong Ahn Hong, Tae Hoon Lim, In Hwan Oh, Suk Woo Nam, Hyung Joon Choi