2023 Fiscal Year Final Research Report
Elucidation of the mechanism of inhibition of electrochemical reactions by adsorption of trace gases in intermediate-temperature fuel cells
| Project/Area Number |
20H02437
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 26020:Inorganic materials and properties-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | プロトン伝導セラミックス型燃料電池 / PCFC / 二酸化炭素 / 二酸化硫黄 / 過電圧 |
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| Outline of Final Research Achievements |
CO2 is identified as the main cause of the short-term increase in overpotential when air is supplied to the cathode of a proton-conducting ceramic fuel cell (PCFC) with La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF6428) cathode and BaZr0.8Y0.2O3-δ (BZY20) electrolyte. In the operating temperature range of PCFCs (500-600°C), a trace amount of CO2 was found to be adsorbed on the surfaces of LSCF and BZY (the amount corresponds to about a monolayer assuming uniform adsorption).
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| Free Research Field |
化学熱力学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の成果である空気中の微量成分の酸素極への影響とそのメカニズムは、PCFCの酸素極で空気をそのまま利用し安定的に発電することにつながる先駆的な知見である。将来的にはPCFCの実用化と水素社会の実現に貢献することが期待される。また、高温の雰囲気制御下において粉末表面での微量の気固反応を捉える本研究の手法は、他の基礎研究にも応用できる可能性がある。
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