TY - JOUR
T1 - Influence of initial powder morphology on polarization characteristics of nickel/Gadolinium-doped-ceria solid oxide fuel cells electrode
AU - Sciazko, Anna
AU - Miyahara, Kazuki
AU - Komatsu, Yosuke
AU - Shimura, Takaaki
AU - Jiao, Zhenjun
AU - Shikazono, Naoki
N1 - Funding Information:
This work was partially supported by the New Energy and Industrial Technology Development Organization (NEDO) and by the Japan Society for the Promotion of Science (JSPS) and by NIMS Nanofab-rication Platform in Nanotechnology Platform Project sponsored by the Ministry of Education, Culture, Sport, Science and Technology (MEXT), Japan.
Publisher Copyright:
© 2019 The Electrochemical Society.
PY - 2019
Y1 - 2019
N2 - Nickel-gadolinium doped ceria (Ni-GDC) composite anodes gain a lot of attention as they have potential to be a beneficial solution for the intermediate temperature solid oxide fuel cells. In this paper, the influence of the initial microstructure of Ni-GDC anode on the polarization characteristics and its deterioration in 100h operation are investigated. The initial microstructures of the investigated anodes are determined by the different sizes and aspect ratios of the GDC powders, but all anodes having the same initial compositions of NiO:GDC = 60:40 vol.%. It was found that the anode with the smallest GDC particle had the best initial performance, but also underwent the most severe degradation. Themicrostructures of the fabricated anodeswere investigated by focused ion beam - scanning electron microscopy (FIB-SEM), andmicrostructural parameters were quantified to relate the electrochemical performance. From the experimentation, contribution of the Ni-GDC microstructure to the anode polarization characteristics is discussed. Themorphological evolution after the operation is also in discussion, especially those of the GDC phase. It was concluded that the mobility of GDC could be an influential factor determining the change in polarization resistance.
AB - Nickel-gadolinium doped ceria (Ni-GDC) composite anodes gain a lot of attention as they have potential to be a beneficial solution for the intermediate temperature solid oxide fuel cells. In this paper, the influence of the initial microstructure of Ni-GDC anode on the polarization characteristics and its deterioration in 100h operation are investigated. The initial microstructures of the investigated anodes are determined by the different sizes and aspect ratios of the GDC powders, but all anodes having the same initial compositions of NiO:GDC = 60:40 vol.%. It was found that the anode with the smallest GDC particle had the best initial performance, but also underwent the most severe degradation. Themicrostructures of the fabricated anodeswere investigated by focused ion beam - scanning electron microscopy (FIB-SEM), andmicrostructural parameters were quantified to relate the electrochemical performance. From the experimentation, contribution of the Ni-GDC microstructure to the anode polarization characteristics is discussed. Themorphological evolution after the operation is also in discussion, especially those of the GDC phase. It was concluded that the mobility of GDC could be an influential factor determining the change in polarization resistance.
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U2 - 10.1149/2.0181902jes
DO - 10.1149/2.0181902jes
M3 - Article
AN - SCOPUS:85071607741
SN - 0013-4651
VL - 166
SP - F44-F52
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 2
ER -