Interface chemistry of electrochemical reaction on the surface of proton conducting solid oxide

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04981
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 32010:Fundamental physical chemistry-related
• Research Institution: Kyushu University
• Principal Investigator: Tachikawa Yuya 九州大学, 工学研究院, 准教授 (70587857)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 固体酸化物セル / 燃料電池 / 水蒸気電解 / 電気化学インピーダンス

Outline of Final Research Achievements

To clarify the surface properties of proton-conductive materials among ion-conductive solid oxide materials at high temperatures, we conducted a study to evaluate the operating characteristics of electrochemical cells by analyzing and measuring the distribution of relaxation time by electrochemical impedance spectroscopy. Although some measurement issues remained, we were able to overcome the electrolyte-induced performance drop by using different ion-conducting materials. This study also demonstrated that the above-mentioned electrochemical impedance spectroscopy as a measurement method, which focuses on the distribution of relaxation time, can be used for detailed analysis and comparison of the properties.

Free Research Field

電気化学、機械工学

Academic Significance and Societal Importance of the Research Achievements

固体酸化物材料は燃料電池や水蒸気電解などの電気化学エネルギー変換技術の核となる材料であり、その新規材料開発ならびに本研究で着目した材料の有する特性の評価解析を進める分析手法の技術向上は、今後のさらなる技術革新を進め学術的理解を深める上で、学術的に意義がある。また、上記材料の用いられるデバイスはエネルギーの脱炭素化とエネルギー利用の高効率化・高性能化を進める上で社会的に注目されており、本研究成果の展開による社会的な貢献も期待できる。