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Proton-Conductive Polyphosphate Electrolytes and their Application to Solid Electrolyte Fuel Cells

Research Project

Project/Area Number 04650718
Research Category

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

Allocation TypeSingle-year Grants
Research Field 工業物理化学・複合材料
Research InstitutionMuroran Institute of Technlogy

Principal Investigator

TADAO Kenji  Muroran Institute of Technlogy, Professor, 工学部, 教授 (00005977)

Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1992: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsFuel cell / Solid electrolyte / Proton conductor / Polyphoshate / ポリリン酸 / プロトン伝導体 / 低温燃料電池
Research Abstract

Solid electrolytes are required to solve the life problem of phosphoric acid fuel cells. This study is an attempt to prepare solid proton conductors by a minor modification of polyphosphate. NH_4PO_3 was able to be made proton-conductive by thermal decomposition of NH_4^+ to H^+ + NH_3. The partially decomposed NH_4PO_3, however, melted below 300'C.To increase the melting temperature, (NH_4)_2SiP_4O_<13> was attempted as a starting materials. The heat-treated (NH_4)_2SiP_4O_<13> was thermally more resistive, but its conductivity was lower. To attain a high conductivity and a high melting temperature simultaneously, a composite electrolyte consisting of (NH_4)_2SiP_4O_<13> bound together by NH_4PO_3 was prepared. This material obtained has the maximum conductivity of 0.1S/cm at 400'c, but above this temperature, the conductivity decreases with increasing temperature, probably due to dehydration. The proton conductivity was confirmed by the potential measurement of an H_2 concentration cell installed with this electrolyte.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] Tadao Kenjo: "Proton Conductors Based on Ammonim Polyphosphate" Solid State Ionics誌. (発表予定).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Tadao Kenjo: "Geometrical Effects on Pseudocapacitance in Pt/YSZ Electrode" Solid State Ionics誌. (発表予定).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 山越幸康: "Pt/YSZ空気電極の分極値のバラツキについて" 日本化学会誌. 1994. 12-17 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Tadao Kenjo: "Morphological Effects on Pt/ZrO_2 Fuel Cell Cathodes" 電気化学. 61. 758-759 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Tadao Kenjo: "An Estimation of Contact Area by Linear Sweep Voltammetry" Journal of Electrochemical Society. 140. 2151-2157 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Kenjo: "Proton Conductors Based on Ammonium Polyphoshate" Solid State Ionics. (to be published).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Kenjo: "Geometrical Effects on Pseudocapacitance in Pt/YSz Electrodes" Solid State Ionics. (to be published).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Y.Yamakoshi: "Data Scattering in Pt/YSz Air Cathodes" J.Chemical Society of Japan. Vol.1994. 12-17 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Kenjo: "Morphological Effects on Pt/ZrO_2 Fuel Cell Cathodes" DENKI KAGAKU. Vol.61. 758-759 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Kenjo: "An Estimation of Contact Area by Linear Sweep Voltammetry" J.Electrochemical Society. Vol.140. 2151-2157 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Kenjo: "Proton Conductors Based on Ammonium Polyphosphate" Solid State Ionics.

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Kenjo: "Geometrical Effects on Pseudocapacitance in Pt/YSZ Electrodes" Solid State Ionics.

    • Related Report
      1993 Annual Research Report
  • [Publications] 山越 幸康: "白金/ジルコニア系空気電極の性能のばらつきに対する電気化学的解析" 日本化学雑誌. 1994. 12-17 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Kenjo: "Morphological Effects on Pt/ZrO_2 Fuel Cell Cathodes" DENKI KAGAKU. 61. 758-759 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Kenjo: "An Estimation of Contact by Linear Sweep Voltammetry" J.Electrochemical Society. 140. 2151-2157 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Kenjo Y.Yamakoshi: "Relaxation Phenomena of the Concentration Polarization in High Temperature Air Cathodes" Bulletin of the chemical Society of Japan. 65. 995-1001 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 見城 忠男,清水 誠 佐々木 一隆: "Ln_2CuO_4型高温空気電極" 電気化学. 60. 700-705 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Kenjo M.Nishiya: "LaMnO_3 Air Cathodes Containing ZrO_2 Electrolyte for High Temperature Solid Oxide Fuel Cells" Solid State Ionics. 57. 295-302 (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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