【摘 要】
：
A composite interlayer comprised of gadolinia doped ceria (GDC) and Co/Fe oxide was prepared and investigated for solid oxide electrolysis cell with yttrium stabilized zirconia (YSZ) electrolyte and La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) anode.The interlayer was
【机 构】
：
Division of Fuel Cells, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Ph
论文部分内容阅读
A composite interlayer comprised of gadolinia doped ceria (GDC) and Co/Fe oxide was prepared and investigated for solid oxide electrolysis cell with yttrium stabilized zirconia (YSZ) electrolyte and La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) anode.The interlayer was constructed of a base layer of GDC and a top layer of discrete Co3O4/FeCo2O4 particles.The presence of the GDC layer drastically alleviated the undesired reactions between LSCF and YSZ,and the presence of Co/Fe oxide led to further performance improvement.At 800 ℃ and 45％ humidity,the cell with 70％ Co/Fe-GDC interlayer achieved 0.98 A/cm2 at 1.18 V,14％ higher than the cell without Co/Fe oxide.Electrochemical impedance spectroscopy (EIS) revealed that with higher Co/Fe content,both the ohmic resistance and the polarization resistance of the cell were reduced.It is suggested that Co/Fe oxide can react with the Sr species segregated from LSCF and Sr1-x(Co,Fe)O3-δ,a compound with high catalytic activity and electronic conductivity.The St-capturing ability of Co/Fe oxide in combination with the Sr-blocking ability of GDC layer can effectively suppress the undesired reaction between LSCF and YSZ,and consequently improve the cell performance.
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