High performance gadolinium doped ceria

based IT-SOFC electrolytes

 

M. El Himri1, A. El Himri2*, P. Núñez3

1Laboratoire de Chimie Appliquée et Environnement, Université Mohammed Premier, BP 717, 60000 Oujda, Morocco.

2Ecole Nationale des Sciences Appliquées d'Al Hoceima, Université Mohammed Premier, B.P. 3, Ajdir, Al Hoceima, Morocco

3Department of Inorganic Chemistry, University of La Laguna, Tenerife, Spain

* Corresponding author. E-mail: name2004@hotmail.com

Received: 08 February 2011; revised version accepted: 13 January 2012

 

Abstract

     A simple and fast processing route to gadolinium doped ceria based electrolyte has been developed, based by heating of precursors resulting from freeze drying of aqueous solutions of the appropriate common metal salts at relatively low temperature. The material has been characterized by X-ray powder diffraction, elemental analysis, scanning electron microscopy and impedance spectroscopy. The XRD results showed that the powder has a single phase with cubic fluorite structure. The SEM results exhibited that electrolyte pellets sintered at 1200 °C was dense, and the relative density of pellet was over 96 %. The results displayed by Impedance spectra analysis showed that Ce0.9Gd0.1O2-d appeared high conductivity at the temperature range of 500-700 °C. 

 

Keywords: Freeze drying; IT-SOFC; Solid electrolyte; Conductivity

 


 

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