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High Temperature Steam Electrolysis for Efficient Hydrogen Production

Research Project

Project/Area Number 17360335
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionUniversity of Yamanashi

Principal Investigator

UCHIDA Hiroyuki  University of Yamanashi, Department of Research Interdisciplinary Graduate School of Medicine and Engineering, Professor, 大学院医学工学総合研究部, 教授 (20127434)

Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥8,300,000 (Direct Cost: ¥8,300,000)
Fiscal Year 2006: ¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2005: ¥4,600,000 (Direct Cost: ¥4,600,000)
KeywordsSteam Electrolysis / Solid Oxide Electrolysis Cell / Hydrogen Production / Ceria / Nickel / LSCF
Research Abstract

Solid oxide electrolysis cells (SOECs) are expected, in principle, to provide the highest efficiency of electrolytic hydrogen production, because the applied voltage can be reduced due to favorable thermodynamic and kinetic conditions. It is desirable, however, to operate SOECs at a reduced temperature for a wide choice of the component materials as well as a utilization of various waste heat sources. The aim of this research project is to develop high performance electrodes for the SOECs operating at medium temperatures. We have obtained the following results.
1. Mixed conducting samaria-doped ceria (SDC) cathode with highly dispersed Ni catalysts exhibited very high performance. At 700-900℃, the Ni-dispersed SDC cathode exhibited the highest performance at 17 vol.%-Ni loading, due to the effective enhancement of the reaction rate by increasing the active reaction sites and lowering the electronic resistance.
2. The cathode activity was found to increase with an increase in the ionic co … More nductivity of zirconia electrolyte, similar to the case of SOFC electrodes. An SOEC comprised of Ni-dispersed SDC cathode, ScSZ electrolyte, La(Sr)Co03 anode (with SDC interlayer) exhibited high performance for the short term test; 12R-free cell voltage = 1.13 V at 0.5 A/cm2 and 900℃ under the atmosphere of H2O + H2 (P[H20] = 0.6 atm) and 02 (1 atm).
3. We have developed double layer-type (catalyst layer/current collecting layer) electrodes. As the H2 catalyst layer (anode for SOFC and cathode for SOEC) interfaced with YSZ solid electrolyte, SDC particles were employed in combination with Ni metal electrocatalysts (10 to 20 vol.% of nanometer-size Ni) highly dispersed on their surfaces. The current collecting porous layer of Ni-SDC cermet (60 vol.% of micrometer-size Ni) was formed on the catalyst layer. The H2-electrode with 10 vol.% Ni in the catalyst layer exhibited high performance, due to the effective enhancement of the reaction rate by increasing both the active reaction sites and the electronic conductance. Lao.6Sr0.4Co0.2Fe0.8O3 (LSCF)/(LSCF+SDC) double layer-type electrode worked well to evolve 02 in an SOEC. It was found that the addition of 40 vol.% SDC in the catalyst layer enhanced the performance effectively. Less

Report

(3 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • Research Products

    (12 results)

All 2006 2005

All Journal Article (12 results)

  • [Journal Article] Polarization Behavior of Samaria-Doped Ceria Cathode with Highly Dispersed Ni Catalysts for Solid Oxide Electrolysis Cells2006

    • Author(s)
      Norikazu Osada, Hiroyuki Uchida, Masahiro Watanabe
    • Journal Title

      Journal of the Electrochemical Society 153(No.5)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Interaction of Samaria-Doped Ceria Anode with Highly Dispersed Ni Catalysts in a Medium-Temperature Solid Oxide Fuel Cell during Long-Term Operation2006

    • Author(s)
      Shinsuke Suzuki, Hiroyuki Uchida, Masahiro Watanabe
    • Journal Title

      Solid State Ionics 177(No.3-4)

      Pages: 359-365

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] 燃料電池触媒の反応解析2006

    • Author(s)
      内田裕之, 渡辺政廣
    • Journal Title

      触媒学会北海道地区札幌講演会 要旨集

      Pages: 39-47

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Polarization Behavior of Samaria-Doped Ceria Cathode with Highly Dispersed Ni Catalysts for Solid Oxide Electrolysis Cells2006

    • Author(s)
      Norikazu Osada, Hiroyuki Uchida, Masahiro Watanabe
    • Journal Title

      Journal of the Electrochemical Society 153 (No.5)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Interaction of Samaria-Doped Ceria Anode with Highly Dispersed Ni Catalysts in a Medium-Temperature Solid Oxide Fuel Cell during Long-Term Operation2006

    • Author(s)
      Shinsuke Suzuki, Hiroyuki Uchida, Masahiro Watanabe
    • Journal Title

      Solid State Ionics 177 (No.3-4)

      Pages: 359-365

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Polarization Behavior of Samaria-Doped Ceria Cathode with Highly Dispersed Ni Catalysts for Solid Oxide Electrolysis Cells2006

    • Author(s)
      Norikazu Osada, Hiroyuki Uchida, Masahiro Watanabe
    • Journal Title

      Journal of the Electrochemical Society 153(NO.5)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Polarization Behavior of Samaria-Doped Ceria Cathode with Highly Dispersed Ni Catalysts for Solid Oxide Electrolysis Cells2006

    • Author(s)
      Norikazu Osada, Hiroyuki Uchida, Masahiro Watanabe
    • Journal Title

      Journal of the Electrochemical Society 153(No.5)(印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 固体高分子形および固体酸化物形燃料電池用電極の機能解析2005

    • Author(s)
      内田裕之, 渡辺政廣
    • Journal Title

      第20回材料解析テクノブォーラム 要旨集

      Pages: 95-103

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] SOFCおよびPEFC用電極触媒の設計と機能解析2005

    • Author(s)
      内田裕之, 渡辺政廣
    • Journal Title

      鉱山 58(No.4)

      Pages: 18-25

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Analyses of Electrocatalytic Reactions in Fuel Cell2005

    • Author(s)
      Hiroyuki Uchida, Masahiro Watanabe
    • Journal Title

      Proceedings of Sapporo Symposium for Fuel Cells and Catalysis (Hokkaido Branch of Catalysis Society Japan, Sapporo

      Pages: 39-47

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Functional Analyses of Electrodes for PEFCs and SOFCs2005

    • Author(s)
      Hiroyuki Uchida, Masahiro Watanabe
    • Journal Title

      Proceedings of 20th Techno-Forum for Am*ses of Materials (Tokyo)

      Pages: 95-103

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Design and Functional Analyses of Electrodes for PEFCs and SOFCs2005

    • Author(s)
      Hiroyuki Uchida, Masahiro Watanabe
    • Journal Title

      Kozan 58 (No. 4)

      Pages: 18-25

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary

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Published: 2005-04-01   Modified: 2016-04-21  

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