Fabrication and characterization of Nd2-xInxCe2O7 proton-conducting electrolytes for intermediate-temperature solid oxide fuel cells
By Zhang, Bo; Wu, Kewen; Peng, Kaiping
Published in Journal of Power Sources
2018
Abstract
Nd2-xInxCe2O7 (x = 0, 0.05, 0.10, 0.15 and 0.20) powders are successfully synthesized by citric acid-nitrate sol-gel combustion method. The influence of In doping on the phase structure, morphology, and electrical conduction behavior of neodymium cerium is characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy and electrochemical impedance spectroscopy. All Nd2-xInxCe2O7 ceramics are found to possess a fluorite-type structure. Moreover, Nd1.85In0.15Ce2O7 pellets keep sufficiently excellent chemical stability under different atmospheres containing CO2, water and wet hydrogen. Highly dense ceramics with increasing grain size are obtained by sintering at reduced temperature resulting from indium incorporation promotes sinterability of Nd2-xInxCe2O7. The Nd1.85In0.15Ce2O7 pellet promises the highest total conductivities of 0.75
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