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Studies on synthesis of mixed ion conducting ceramics and their applications

Research Project

Project/Area Number 05453084
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Structural/Functional materials
Research InstitutionNagoya University

Principal Investigator

IWAHARA Hiroyasu  School of Eng., Nagoya Univ.Professor, 工学部, 教授 (80023125)

Co-Investigator(Kenkyū-buntansha) HIBINO Takashi  Government Industrial Research Institute of Nagoya, Senior researcher, 構造プロセス部, 主任研究員 (10238321)
ITOH Hideaki  School of Eng., Nagoya Univ., Assoc.Prof., 工学部, 助教授 (60109270)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥7,500,000 (Direct Cost: ¥7,500,000)
Fiscal Year 1994: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1993: ¥6,500,000 (Direct Cost: ¥6,500,000)
KeywordsIonic conduction / Protonic conduction / Perovskite-type oxide / Membrane reactor / Fuel cell / Chemical cogeneration / 導電率 / 燃料電池 / 電気化学的反応器
Research Abstract

Perovskite-type oxide solid solutions based on BaCeO_3 were synthesized and their ceramics were studied with respect to their ionic conduction at elevated temperatures. Partial substitution of trivalent cations for Ce in BaCeO_3 made the resultant oxide ceramic a mixed ionic conductor of protons and oxide ions under fuel cell condition (H_2/Air). Change in conductivity with ionic radius r of dopant cation was investigated. It was found that the maximum conductivity lay on about r = 0.90-0.95A and that the contribution of oxide ion conduction to the total ionic conductivity under fuel cell condition became marked as the ionic radius grew larger. When BaCeO_3 is doped with divalent cation, both the protonic and oxide ionic conductivities were observed to decrease. Using a temperature programd water vapor desorption experiment and an electrochemical tracer experiment of hydrogen isotope, it could be clarified that low protonic conductivity of the oxide doped with divalent cation was ascribed to small content of proton and its low mobility compared to those in trivalent doped specimens.
These mixed ionic conductors were verified experimentally to be applied to an electrochemical membrane reactor for ethylene production form ethane, a chemical reactor for C_2-hydrocarbon production from methane and a fuel cell for chemical cogeneration which could produce both chemical products and electric power.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] S.Hamakawa: "Electrochemical Methane Coupling Using Protonic Conductors" J.Electrochem.Soc.140. 459-462 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Iwahara: "SOFC Using Dy-Doped BaCeO_3 Ceramics as a Solid Electrolye" Proc.of the 3rd Intern.Symp.on Solid Oxide Fuel Cells. 93-4. 137-145 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Iwahara: "Performance of Solid Oxide Fuel Cell Using Proton and Oxide Ion Mixed Conductors Based on BaCe_<1-X>Sm_XO_<3-α>" J.Electrochem.Soc.140. 1687-1691 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Iwahara: "Effect of Ionic Radii of Dopants on Mixed Ionic Conduction (H^++O^<2->) in BaCeO_3-based Electroltes" SOlid State Ionics. 70/71. 267-271 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Itoh: "Microstructural Control of Boundary Region Between CVD Diamond Film and Cemented Carbides Substrates" J.Mater.Sci.29. 1404-1410 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Hamakawa: "Electrochemical Hydrogen Permeation in a Proton-hole Mixed Conductor and Its Application to a Membrane Reactor" J.Electrochem.Soc.141. 1720-1725 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Hamakawa: "Electrochemical Methane Coupling Using Protonic Conductors" Electrochem.Soc.J.Electrochem.Soc.Vol.140. 459-462 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Iwahara: "SOFC Using Dy-Doped BaCeO_3 Ceramics as a Solid Electrolyte" Proc.of the 3rd Intern.Symp.Solid Oxide Fuel Cells. Vol.93-4. 137-145 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Iwahara: "Performance of Solid Oxide Fuel Cell Using Proton and Oxide Ion Mixed Conductors Based on BaCe_<1-x>Sm_xO_<3-a>" J.Electrochem.Soc.Vol.140. 1687-1691 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Iwahara: "Effect of Ionic Radii of Dopants on Mixed Ionic Conduction (H^++O^<2->) in BaCeO_3-based Electrolytes" Solid State Ionics. Vol.70/71. 267-271 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Itoh: "Microstructural Control of Boundary Region Between CVD Diamond Film and Cemented Carbides Substrates" J.Mater.Sci. Vol.29. 1404-1410 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Hamakawa: "Electrochemical Hydrogen Permeation in a Proton-hole Mixed Conductor and Its Application to a Membrane Reactor" J.Electrochem.Soc. Vol.141. 1720-1725 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Iwahara: "Effect of Ionic Radii of Dopants on Mixed Ionic Conduction(H^++O^<2->) in BaCeO_3‐based Electrolytes" Solid State Ionics. 70/71. 267-271 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Hibino: "A Hydrocarbon Sensor Using a High Temperature‐type Proton Conductor" J.Appl.Electrochem.24. 268-270 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Itoh: "Microstructural Control of Boundary Region Between CVD Diamond Film and Cemented Carbides Substrates" J.Mater Sci.29. 1404-1410 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] S.Hamakawa: "Electrochemical Hydrogen Permeation in a Proton‐hole Mixed Conductor and Its Application to a Membrane Reactor" J.Electrochem.Soc.141. 1720-1725 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 李星洙: "金属線への気相成長ダイヤモンドの微結晶コーティング" 粉体および粉末冶金. 41. 63-67 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Hibino: "Recycling of Carbon Dioxide Using Proton Conductor as a Solid Electrolyte" J.Appl.Electrochem.24. 126-130 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 日比野高士: "固体電解質をメンブレンリアクターに用いたエタンの脱水素" 日本化学会誌. 1993. 238-242 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Satoshi HAMAKAWA: "Electrochemical Methane Coupling Using Protonic Conductors" J.Electrochem.Soc.140. 459-462 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Hiroyasu IWAHARA: "SOFC Using Dy-Doped BaCeO_3 Ceramics as a Solid Electrolyte" Proc.of the 3rd Intern.Symp.on Solid Oxide Fuel Cells. 93-4. 137-145 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Hiroyasu IWAHARA: "Performance of Solid Oxide Fuel Cell Using Proton and Oxide Ion Mixed Conductors Based on BaCe_<1-x>Sm_xO_<3-α>" J.Electrochem.Soc.140. 1687-1691 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 岩原弘育: "ペロブスカイト型酸化物を母体とした高温型プロトン伝導性セラミックスに関する研究" 日本化学会誌. 1993. 1003-1011 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Takashi HIBINO: "H/D Isotope Effect on Electrochemical Pumps of Hydrogen and Water Vapor Using a Proton-Conductive Solid Electrolyte" J.Electrochem.Soc.140. 2589-2592 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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