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Synthesis and characterisation of nanocrystalline CuO–Fe2O3/GDC anode powders for solid oxide fuel cells

Choolaei, Mohammadmehdi, Ramirez Reina, Tomas and Amini Horri, Bahman (2020) Synthesis and characterisation of nanocrystalline CuO–Fe2O3/GDC anode powders for solid oxide fuel cells Ceramics International.

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Abstract

This paper deals with the development and potential application of a novel mixed ionic-electronic conductive anode composite comprised of copper and iron oxide based on gadolinium-doped ceria (CuO–Fe2O3/GDC) for solid-oxide fuel cell (SOFC). Synthesis of the nanocrystalline CuO–Fe2O3/GDC powders was carried out using a novel co-precipitation method based on ammonium tartrate as the precipitant in a mixed-cationic solution composed of Cu2+, Fe3+, Gd3+, and Ce3+. Thermal decomposition of the resultant precipitate after drying (at 55 °C) was investigated in a wide range of temperature (25–900 °C) using simultaneous DSC/TGA technique in air. The DSC/TGA results suggested the optimal calcination temperature of 500 °C for obtaining the nanocrystalline anode composite from the resultant precipitate. The synthesised CuO–Fe2O3/GDC samples were further characterised using XRD, dilatometry, FESEM, and EDX. Several single cells of SOFCs were fabricated in the anode-supported geometry using the synthesised CuO–Fe2O3/GDC composite as the anode, GDC/CuO composite as the electrolyte, and LSCF/GDC composite as the cathode layer. The fabricated cells were analysed using FESEM imaging and EIS analysis, where an equivalent circuit containing five R-CPE terms was used to interpret the EIS data. The module fitted well the impedance data and allowed for a detailed deconvolution of the total impedance spectra. The catalytic activity and uniformity of the synthesised nanocomposites was further evaluated using TPR analysis, demonstrating excellent activity at temperatures as low as 200 °C.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Choolaei, Mohammadmehdim.choolaei@surrey.ac.uk
Ramirez Reina, Tomast.ramirezreina@surrey.ac.uk
Amini Horri, Bahmanb.aminihorri@surrey.ac.uk
Date : 3 March 2020
Funders : Facaulty of Engineering and Physical Sciences (FEPS) - University of Surrey, University of Surrey Department of Chemical and Process Engineering
DOI : 10.1016/j.ceramint.2020.03.002
Copyright Disclaimer : © 2020 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Uncontrolled Keywords : Solid oxide fuel cells Copper oxide Iron oxide Nanocrystalline composite powder Gadolinium-doped ceria Mixed ionic-electronic anode
Depositing User : James Marshall
Date Deposited : 06 Apr 2020 14:54
Last Modified : 06 Apr 2020 14:54
URI: http://epubs.surrey.ac.uk/id/eprint/854128

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