2019 Fiscal Year Final Research Report
Degradation mechanism of solid oxide fuel cells and solid oxide electrolysys cells
| Project/Area Number |
19K21067
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| Project/Area Number (Other) |
18H05887 (2018)
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund (2019)
Single-year Grants (2018) |
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| Review Section |
0301:Mechanics of materials, production engineering, design engineering, fluid engineering, thermal engineering, mechanical dynamics, robotics, aerospace engineering, marine and maritime engineering, and related fields
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
Shimura Takaaki 東京農工大学, 工学(系)研究科(研究院), 特任助教 (70814143)
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| Project Period (FY) |
2018-08-24 – 2020-03-31
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| Keywords | 固体酸化物形燃料電池 / 固体酸化物形電解セル / 三次元電極微細構造再構築 / 酸素同位体ラベリング / 二次イオン質量分析法 |
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| Outline of Final Research Achievements |
The correlation between the electrochemical performance evolution of nicked-yttria stabilized zirconia (Ni-YSZ) composite and nickel-gadolinia doped ceria (Ni-GDC) composite and their microstructural evolutions are investigated during 100 hrs operations of solid oxide fuel cell (SOFC) mode and solid oxide electrolysis cell (SOEC) mode at 800 °C. Each electrode showed different evolutions of electrochemical performance. The three-dimensional microstructural analysis revealed their microstructural evolutions during each mode. Both Ni and ceramic (YSZ and GDC) phases showed different characteristics in microstructural evolution between SOFC and SOEC modes. Furthermore, electrochemical reaction mechanism in actual porous electrode was investigated by coupling oxygen isotope labeling experiment on lanthanum strontium manganese-YSZ composite air electrode and three-dimensional microstructural analysis.
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| Free Research Field |
熱工学
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| Academic Significance and Societal Importance of the Research Achievements |
SOFCおよびSOECの技術は，多様な電源から構成される電力系統において，需給バランスを向上させるために期待されている技術であり，長期間運転における電極性能の耐久性向上はSOFC/SOECシステムの大規模導入のために必須の課題である．本研究により，電極の両運転モードにおける性能変化と電極構造の相関，実電極における反応メカニズムに関して，より高性能な電極設計に必要な知見を得ることができた．
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