Barium cerate-based electrolytes containing different amounts of Nb5+ as a dopant were investigated with the aim of attaining materials with improved chemical stability. BaCe0.9-xNbxY0.1O3-x(BCYN) powders with different compositions (0 ≤ x ≤ 0.20) were synthesized by citrate–nitrate auto-combustion method and pure single phases were obtained at 1000 °C. Dense pellets were obtained using sintering a temperature of 1450 °C for 10 hours. The chemical stability was evaluated by XRD analysis after CO2 exposure at 700°C for 3 hours. To investigate the effect of Nb5+ doping on conductivity, electrochemical impedance spectroscopy(EIS) measurements were carried out in the 400–700 °C temperature range in different atmospheres.
DI BARTOLOMEO, E., D'Epifanio, A., Pugnalini, C., Zunic, M., D'Ottavi, C., Licoccia, S. (2010). Phase stability and electrochemical analysis of Nb doped BaCe0.9Y0.1O3-x electrolyte for IT-SOFCs. ECS TRANSACTIONS, 28(11), 259-265 [10.1149/1.3495849].
Phase stability and electrochemical analysis of Nb doped BaCe0.9Y0.1O3-x electrolyte for IT-SOFCs
DI BARTOLOMEO, ELISABETTA;D'EPIFANIO, ALESSANDRA;D'OTTAVI, CADIA;LICOCCIA, SILVIA
2010-01-01
Abstract
Barium cerate-based electrolytes containing different amounts of Nb5+ as a dopant were investigated with the aim of attaining materials with improved chemical stability. BaCe0.9-xNbxY0.1O3-x(BCYN) powders with different compositions (0 ≤ x ≤ 0.20) were synthesized by citrate–nitrate auto-combustion method and pure single phases were obtained at 1000 °C. Dense pellets were obtained using sintering a temperature of 1450 °C for 10 hours. The chemical stability was evaluated by XRD analysis after CO2 exposure at 700°C for 3 hours. To investigate the effect of Nb5+ doping on conductivity, electrochemical impedance spectroscopy(EIS) measurements were carried out in the 400–700 °C temperature range in different atmospheres.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
