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Development of equivalent circuit analysis method for multi-carrier-conductor/electrode systems

Research Project

Project/Area Number 19H02796
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
Research InstitutionTohoku University

Principal Investigator

Kawada Tatsuya  東北大学, 環境科学研究科, 教授 (10271983)

Co-Investigator(Kenkyū-buntansha) 八代 圭司  東北大学, 環境科学研究科, 准教授 (20323107)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
Fiscal Year 2019: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywordsプロトン導電体 / 混合導電体 / 等価回路 / マルチキャリア / 固体酸化物形燃料電池 / プロトンセラミック燃料電池 / 混合導電性
Outline of Research at the Start

プロトン・酸化物イオン・電子の混合導電性を有するBaZrO3やSrCeO3系酸化物など,三種類以上の導電キャリアを有する電解質と電極からなる系に関して,その複雑な輸送・電位発生挙動を表す等価回路を提案し,物理的な妥当性を検証するとともに,一般的な回路シミュレーターを用いて,この等価回路の過渡応答・交流応答を簡便に解析する手法を開発し,実験結果との比較を通して,マルチキャリア導電体上の電極反応の実用的な評価手法として確立する。

Outline of Final Research Achievements

Transport properties of proton-conducting oxides, which are expected as electrolytes for high efficiency fuel cells, are affected by the mobile holes and oxide ions. An equivalent circuit model was proposed to enable simple evaluation of their behaviors using a general-purpose circuit simulator. A surrogate model with the gas-solid exchange resistances of hydrogen, water vapor, and oxygen as parameters was developed for a fast search for combinations of electrode resistances that reproduce the experimental results. Transport constants which are necessary for the calculation were measured, and the calculated results were experimentally verified.

Academic Significance and Societal Importance of the Research Achievements

プロトン導電性酸化物を電解質とする燃料電池は80%以上の発電効率を達成し得るとの試算がありNEDO事業等の実用化研究が盛んに行われているが,その挙動の複雑さから,性能を正しく評価するために数値計算が必要であり,研究開発の障壁のひとつとなっている。この系を等価回路で表すことで一般的な回路シミュレータソフトを使った計算が可能になり,開発促進に資する他,挙動と現象の対応がグラフィカルに理解できるようになる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (4 results)

All 2020 2019

All Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Presentation] Equivalent Circuit Analysis of Mass Transport of Proton- Oxide Ion- Electron Mixed Conductors for Fuel Cells and Electrolysis Cells2020

    • Author(s)
      Keiji Yashiro, Kotaro Okuyama, Tatsuya Kawada
    • Organizer
      PRiME (Pacific Rim Meeting of Electrochemical and Solid State Science)2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Equivalent Circuit Model of a Triple-Carrier Conductor with Partially Blocking Electrodes2020

    • Author(s)
      Kotaro Okuyama, Keiji Yashiro, Yoshitaka Aoki, Tatsuya Kawada
    • Organizer
      14th European SOFC&SOEC Forum
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] プロトン・酸化物イオン・電子混合導電体における電極反応の等価回路解析2019

    • Author(s)
      奥山弘太郎,Arthur Bourdon,川田達也,八代圭司
    • Organizer
      2019年電気化学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] プロトン・酸化物イオン・電子混合導電体における物質輸送の等価回路解析2019

    • Author(s)
      奥山弘太郎,Arthur Bourdon,八代圭司,川田達也
    • Organizer
      第45回固体イオニクス討論会
    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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