Study of Sr 2 MgMo 0.9 Ni 0.1 O 6-δ as SOFC Anode

DAGER, PAOLA KATHERINE; MOGNI, LILIANA VERONICA; ZAMPIERI, GUILLERMO; CANEIRO, ALBERTO

ECS Transactions

The Journal of the Electrochemical Society

Año: 2017 vol. 78 p. 1367 - 1374

1938-6737

Sr2MgMo0.9Ni0.1O6-δ (SMMNi) double perovskite was synthesized by the combustion-solution method followed by annealing in air at 1100oC for 12 hours. Sr2MgMoO6-δ (SMMO) compound was also tested for comparison. X-Ray Diffraction (XRD) patterns indicate that SMMO and SMMNi powders display triclinic symmetry. Thermogravimetric studies show that Mo-substitution by Ni in SMMO decreases the oxygen content in air condition. Meanwhile, after calcination in diluted-H2 both compounds show oxygen non- stoichiometric change ∆δ ≈ 0.06. EIS measurements on symmetrical SMMO/GDC/SMMO and SMMNi/GDC/SMMNi cells were performed in order to study the influence of time and environment conditions (H2-content) on the anode polarizationresistance (Rpa).