Journal
JOURNAL OF POWER SOURCES
Volume 293, Issue -, Pages 642-648Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2015.05.088
Keywords
Solid oxide electrolysis cell; High temperature; Carbon dioxide reduction; Ni- Gadolinium doped ceria; Lanthanum strontium cobalt ferrite; Mixed conductivity
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The electrochemical performance of Ni-gadolinia-doped ceria (GDC) cathode was studied for CO2 reduction on solid oxide electrolysis cell (SOEC) at 1000 degrees C and compared with that of Ni-yttria stabilized zirconia (Ni-YSZ) cathode. Ni-GDC cathode demonstrated higher performance for CO2 reduction. Furthermore, lanthanum strontium cobalt ferrite (LSCF) anode exhibited lower overpotential than lanthanum strontium manganite-yttria stabilized zirconia (LSM-YSZ) anode. Ni-GDC cathode and LSCF anode were found to be stable under a constant current density of -0.90 A cm(-2) at 900 degrees C. Moreover, no substantial performance degradation was observed for the cell having Ni-GDC cathode and LSCF anode even after 9 h of electrolysis operation under a constant current density of -1.2 A cm(-2) at 1000 degrees C. (C) 2015 Elsevier B.V. All rights reserved.
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