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Degradation mechanism of solid oxide cell electrodes during reversible operation between fuel cell and electrolysis cell modes

Research Project

Project/Area Number 20K14663
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 19020:Thermal engineering-related
Research InstitutionThe University of Tokyo (2021-2022)
Tokyo University of Agriculture and Technology (2020)

Principal Investigator

Shimura Takaaki  東京大学, 生産技術研究所, 特任助教 (70814143)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords固体酸化物形燃料電池 / 固体酸化物形電解セル / 三次元微細構造 / 格子ボルツマン法 / 同位体交換 / 三次元電極微細構造 / 酸素同位体交換 / 二次イオン質量分析法 / 同位体ラベリング
Outline of Research at the Start

エネルギー問題は世界的に急務の課題であり,多様なエネルギー源の有効活用が強く求められている.固体酸化物形燃料電池(SOFC)およびその逆モード運転である固体酸化物形電解セル(SOEC)は,発電と燃料合成を高い変換効率にて実現できるエネルギー変換機器であり,電力の需給に応じて両モードをリバーシブルに運転する手法が注目されている.固体酸化物形セルの課題は長期運転時の電極性能の劣化による変換効率の低下である.本研究においては,マイクロスケール以下の電極微細構造に着目し,様々な劣化要因の影響を,実験及びシミュレーションの技術を組み合わせることで評価し,高効率・高耐久性の電極設計指針を得ることを目指す.

Outline of Final Research Achievements

Solid oxide cells (SOCs) are promising energy conversion devices owing to their high efficiency, which can be operated for electricity generation as fuel cell and fuel production as electrolysis cell modes. For practical use, high durability and enhancement in electrode performance are further required, which should be designed based on the precise understanding of electrode reaction mechanisms in the actual electrode microstructure. In this study, the actual reaction mechanism of the air electrode is investigated through oxygen isotope labeling during the power generation and the numerical simulation of oxygen isotope transport under the operating condition.

Academic Significance and Societal Importance of the Research Achievements

これまでの三次元電極構造解析と電極反応シミュレーションでは,局所の実際の電極反応に関しては検証ができなかった.一方,同位体交換を用いた実験においても,同位体の取り込み,輸送は電極反応だけではなく同位体の濃度勾配により進行するため,実験によって得られた同位体分布と実際の反応場を直接結びつけて議論することは困難であった.本研究で,実際の多孔質電極構造における同位体交換実験と数値計算を併用することで,これまでは議論できなかった局所の電極反応メカニズムの解明に貢献する手法を確率することができた.電極反応メカニズムの解明が促進され,高性能な電極設計の指針を得ることに役立つと期待される.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (12 results)

All 2023 2021 2020

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (7 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Three-dimensional numerical simulation of oxygen isotope transport in lanthanum strontium manganese - Yttria-stabilized zirconia cathode of solid oxide fuel cell2023

    • Author(s)
      Shimura T.、Nagasawa T.、Shikazono N.、Hanamura K.
    • Journal Title

      International Journal of Hydrogen Energy

      Volume: 未定 Issue: 50 Pages: 19233-19247

    • DOI

      10.1016/j.ijhydene.2023.01.349

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Distribution of Reaction Sites in SOFC Cathode through Oxygen Isotope Labeling with Three-Dimensional Microstructural Analysis2021

    • Author(s)
      Nagasawa Tsuyoshi、Shimura Takaaki、Shikazono Naoki、Hanamura Katsunori
    • Journal Title

      Journal of The Electrochemical Society

      Volume: 168 Issue: 6 Pages: 064506-064506

    • DOI

      10.1149/1945-7111/ac075f

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Electrochemical Reaction Mechanism of LSM-YSZ Composite Cathode Based on 3D Simulation of Oxygen Diffusion and Oxygen Labeling Experiment2021

    • Author(s)
      Shimura Takaaki、Nagasawa Tsuyoshi、Shikazono Naoki、Hanamura Katsunori
    • Journal Title

      ECS Transactions

      Volume: 103 Issue: 1 Pages: 1339-1349

    • DOI

      10.1149/10301.1339ecst

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Ni-GDC and Ni-YSZ electrodes operated in solid oxide electrolysis and fuel cell modes2021

    • Author(s)
      SCIAZKO Anna、SHIMURA Takaaki、KOMATSU Yosuke、SHIKAZONO Naoki
    • Journal Title

      Journal of Thermal Science and Technology

      Volume: 16 Issue: 1 Pages: JTST0013-JTST0013

    • DOI

      10.1299/jtst.2021jtst0013

    • NAID

      130007965467

    • ISSN
      1880-5566
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Multiscale microstructural evolutions of nickel-gadolinium doped ceria in solid oxide fuel cell anode2020

    • Author(s)
      Sciazko Anna、Komatsu Yosuke、Shimura Takaaki、Shikazono Naoki
    • Journal Title

      Journal of Power Sources

      Volume: 478 Pages: 228710-228710

    • DOI

      10.1016/j.jpowsour.2020.228710

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] LSM/YSZ コンポジット電極の酸素同位体ラベリングと三次元微細構造内酸素拡散数値シミュレーション2021

    • Author(s)
      志村 敬彬,長澤 剛,鹿園 直毅,花村 克悟
    • Organizer
      第58回日本伝熱シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] Electrochemical Reaction Mechanism of LSM-YSZ Composite Cathode Based on 3D Simulation of Oxygen Diffusion and Oxygen Labeling Experiment2021

    • Author(s)
      Shimura Takaaki、Nagasawa Tsuyoshi、Shikazono Naoki、Hanamura Katsunori
    • Organizer
      SOFC-XVII
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] LSM/YSZコンポジット電極の三次元構造を用いた電気化学シミュレーションと酸素同位体分布の比較による電極内反応メカニズムの検証2020

    • Author(s)
      志村 敬彬,長澤 剛,鹿園 直毅,花村 克悟
    • Organizer
      第29回SOFC研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 酸素同位体ラベリングと三次元簿構造観察を組み合わせたLSM/YSZ コンポジット電極の反応場分布解析2020

    • Author(s)
      長澤 剛,志村 敬彬,鹿園 直毅,花村 克悟
    • Organizer
      第29回SOFC研究発表会講演要旨集
    • Related Report
      2020 Research-status Report
  • [Presentation] Distribution of Electrochemical Reaction Sites in SOFC Composite Cathode Based on Isotope Labeling Coupled with Three-dimensional Electrochemical Simulation2020

    • Author(s)
      Shimura, T., Nagasawa, T., Shikazono, N. and Hanamura, K
    • Organizer
      14th European SOFC and SOE Forum
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Evolutions of microstructure and performance of Ni-GDC and Ni-YSZ fuel electrodes under reversible operation2020

    • Author(s)
      Sciazko, A., Shimura, T., Komatsu, Y. and Shikazono, N
    • Organizer
      14th European SOFC and SOE Forum
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 酸素同位体ラベリングと三次元微細構造解析を用いた固体酸化物燃料電池コンポジット空気極の活性反応場の評価2020

    • Author(s)
      志村敬彬,長澤 剛,鹿園直毅,花村 克悟
    • Organizer
      第57回日本伝熱シンポジウム
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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