Multiscale microstructural evolutions of nickel-gadolinium doped ceria in solid oxide fuel cell anode

Anna Sciazko, Yosuke Komatsu, Takaaki Shimura, Naoki Shikazono

研究成果: Article

抜粋

In the present study, multiscale microstructure evolutions of nickel and gadolinium doped ceria (Ni-GDC) composite anode operated under humidified condition (800 °C, 40%H2O:20%H2:40%N2) are investigated. Focused ion beam - scanning electron microscopy (FIB-SEM) with spatial resolutions of 2 nm and 25 nm are used to observe the changes in both local and whole microstructures. Significant multiscale reorganization of the microstructure is observed in both Ni and GDC phases. Migration of GDC nano-particles in the range of several micrometers is confirmed. In addition, thin GDC layer with nanometer thickness is formed on the Ni surface, similar to the strong metal support interaction (SMSI). Heterogeneous microstructural evolutions of the GDC phase are seen at the electrode-electrolyte interface and at the vicinity of the current collector. The GDC microstructural evolution is considered as a key factor of anode degradation.

元の言語English
記事番号228710
ジャーナルJournal of Power Sources
478
DOI
出版物ステータスPublished - 2020 12 1

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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