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Durability study of an intermediate temperature fuel cell based on an oxide-carbonate composite electrolyte

Zhang, Lei and Lan, Rong and Petit, Christophe T. G. and Tao, Shanwen (2010) Durability study of an intermediate temperature fuel cell based on an oxide-carbonate composite electrolyte. International Journal of Hydrogen Energy, 35 (13). pp. 6934-6940. ISSN 0360-3199

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Abstract

It was reported that ceria-carbonate composites are promising electrolyte materials for intermediate temperature fuel cells. The conductivity stability of composite electrolyte with co-doped ceria and binary carbonate was measured by AC impedance spectroscopy. At 550 degrees C, the conductivity dropped from 0.26 to 0.21 S cm(-1) in air during the measured 135 h. At a constant current density of 1 A cm(-2), the cell performance keeps decreasing at 550 degrees C, with a maximum power density change from 520 to 300 mW cm(-2). This is due to the increase of both series and electrode polarisation resistances. Obvious morphology change of the electrolyte nearby the cathode/electrolyte interface was observed by SEM. Both XRD and FT-IR investigations indicate that there are some interactions between the doped ceria and carbonates. Thermal analysis indicates that the oxide-carbonate composite is quite stable at 550 degrees C. The durability of this kind of fuel cell is not good during our experiments. A complete solid oxide-carbonate composite would be better choice for a stable fuel cell performance.

Item type: Article
ID code: 34078
Keywords: intermediate temperature, fuel cell, durability, co-doped ceria, composite electrolyte, nanocomposite electrolyte, conductivity, stability, Chemistry, Energy Engineering and Power Technology, Condensed Matter Physics, Fuel Technology, Renewable Energy, Sustainability and the Environment
Subjects: Science > Chemistry
Department: Faculty of Engineering > Chemical and Process Engineering
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 18 Oct 2011 15:19
    Last modified: 05 Sep 2014 11:31
    URI: http://strathprints.strath.ac.uk/id/eprint/34078

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