RT Journal Article
T1 Crystal structure and compositional effects on theelectrical and electrochemical properties of GdBaCo2�xMnxO5+d (0 # x # 2) oxides for use as air electrodes in solid oxide fuel cells
A1 García Martín, Susana
AB The effects of the substitution of Co with Mn in the crystal structure, oxygen content, thermal stability and expansion and electrical properties of GdBaCo2−xMnxO5+δ (0 ≤ x ≤ 2) oxides are reported. Composites of GdBaCo2−xMnxO5+δ–Ce0.9Gd0.1O2−δ (70 : 30 wt%) are used as cathode materials and their electrochemical behaviour is presented. Layered-type ordering of Ba and Gd cations in the perovskite structure occurs in the whole system when the materials are prepared in argon but only for compositions in the range corresponding to x < 1.4 when the materials are prepared in air. The oxygen content increases with increasing the Mn content, causing thermal stability to improve and thermal expansion to decrease. However, lowering of the dc conductivity and an increase of electrode polarization resistances are observed by Mn substitution for Co. Cation ordering of the Gd and Ba atoms seems to affect the electrochemical properties of the materials.
PB RSC
SN 2050-7496 (Online) 2050-7488(Print)
LK https://hdl.handle.net/20.500.14352/65304
UL https://hdl.handle.net/20.500.14352/65304
LA eng
DS Docta Complutense
RD 6 abr 2025