Abstract
A Ni-scandia-stabilized zirconia(Ni-ScSZ) cermet anode modified by coating with nano-sized gadolinium-doped ceria(GDC,Gd0.2Ce0.8O2) was prepared using a simple combustion process for the solid oxide fuel cell(SOFC) running on methane fuel.X-ray diffraction(XRD) and scanning electron microscopy(SEM) indicated that the surface of Ni-ScSZ was coated by nano-sized GDC particles(<100nm).Single cell testing showed that the 2.0%(by mass) GDC-coated Ni-ScSZ anode had better performance.The highest power densities of the cell with this anode were 825 and 848mW/cm2 at 850℃ in humidified hydrogen and methane,respectively,whereas the corresponding values were 584 and 586mW/cm2 for the cell with Ni-ScSZ anode.Electrochemical impedance spectra(EIS) illustrated that the cell with Ni-ScSZ anode exhibited far greater impedances than the cell with 2.0%(by mass) GDC-coated Ni-ScSZ anode.Then the short-term stability for the cells with the Ni-ScSZ and 2.0%(by mass) GDC-coated Ni-ScSZ anodes in 97%CH4/3%H2O at 700℃ was checked over a relative long period of operation.No significant degradation in performance has been observed after 84 h of cell testing when 2.0%(by mass) GDC-coated Ni-ScSZ anode was exposed to 97%CH4/3%H2O at 700 ℃.Very little carbon was detected on the anodes,suggesting that carbon deposition was limited during cell operation.
Keywords
solid oxide fuel cell(SOFC), methane oxidation, anode, carbon deposition, electrochemical impedance spectroscopy
Publication Date
2007-02-28
Online Available Date
2007-02-28
Revised Date
2007-02-28
Received Date
2007-02-28
Recommended Citation
Ren-zhu LIU, Bo HUANG, Xiao-feng YE, Shao-rong WANG, Jia-di CAO, Huai-wen NIE, Ting-lian WEN.
Fabrication and Performance of Ni-ScSZ Cermet Anode Modified by Coating with Gd_(0.2)Ce_(0.8)O_2 for a SOFC[J]. Journal of Electrochemistry,
2007
,
13(1): Article 21.
DOI: 10.61558/2993-074X.2770
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol13/iss1/21
Included in
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