TY - JOUR
T1 - Multiscale microstructural evolutions of nickel-gadolinium doped ceria in solid oxide fuel cell anode
AU - Sciazko, Anna
AU - Komatsu, Yosuke
AU - Shimura, Takaaki
AU - Shikazono, Naoki
N1 - Funding Information:
This work was partially supported by the New Energy and Industrial Technology Development Organization (NEDO) , the Japan Society for the Promotion of Science (JSPS) and by NIMS Nanofabrication Platform in Nanotechnology Platform Project sponsored by the Ministry of Education, Culture, Sport, Science and Technology (MEXT), Japan .
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/12/1
Y1 - 2020/12/1
N2 - 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.
AB - 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.
KW - Degradation
KW - Microstructure
KW - Ni-GDC composite Anode
KW - Phase mobility
KW - Solid oxide fuel cell
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U2 - 10.1016/j.jpowsour.2020.228710
DO - 10.1016/j.jpowsour.2020.228710
M3 - Article
AN - SCOPUS:85089899908
SN - 0378-7753
VL - 478
JO - Journal of Power Sources
JF - Journal of Power Sources
M1 - 228710
ER -