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Synthesis and Characterization of BaZr0.8Y0.2O3 Protonic Conductor for Intermediate Temperature Solid Oxide Fuel Cells (IT-SOFCs)

Published online by Cambridge University Press:  26 February 2011

Alessandra D'Epifanio ,
Emiliana Fabbri ,
Elisabetta Di Bartolomeo ,
Silvia Licoccia  and
Enrico Traversa
Alessandra D'Epifanio
Affiliation:
[email protected], University of Rome Tor Vergata, Dept. of Chemical Science and Technology, Via della Ricerca Scientifica,1, 00133 Rome, Rome, N/A, Italy, +390672594737, +390672594328
Emiliana Fabbri
Affiliation:
[email protected], University of Rome Tor Vergata, Dept. of Chemical Science and Technology, Via della Ricerca Scientifica,1, Rome, 00133, Italy
Elisabetta Di Bartolomeo
Affiliation:
[email protected], University of Rome Tor Vergata, Dept. of Chemical Science and Technology, Via della Ricerca Scientifica,1, Rome, 00133, Italy
Silvia Licoccia
Affiliation:
[email protected], University of Rome Tor Vergata, Dept. of Chemical Science and Technology, Via della Ricerca Scientifica,1, Rome, 00133, Italy
Enrico Traversa
Affiliation:
[email protected], University of Rome Tor Vergata, Dept. of Chemical Science and Technology, Via della Ricerca Scientifica,1, Rome, 00133, Italy
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Abstract

Barium zirconate BaZr0.8Y0.2O3-δ, to be used as protonic conductor under hydrogen containing atmosphere in intermediate temperature (500-700°C) solid oxide fuel cells (IT-SOFCs) was prepared using a sol-gel technique to produce materials with controlled chemical structure and microstructural properties. Several synthetic procedures were investigated, dissolving the metal cations in two solvents (water and ethylene glycol) and using different molar ratios of citric acid with respect to the total metal content. A single phase was obtained at temperature as low as 1100°C. To verify the chemical stability, all the sintered oxides were exposed to CO2 and the phase composition of the resulting specimens was investigated using X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). Fuel cell polarization curves on symmetric Pt/BZY20/Pt cells of different thickness were measured at intermediate temperatures (500-700°C).

Keywords

sol-gelelectrical propertiesoxide
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 972: Symposium AA – Solid-State Ionics—2006 , 2006 , 0972-AA01-05
Copyright
Copyright © Materials Research Society 2007

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