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Synthesis and characterization of nanoparticulate La0.6Sr0.4CoO3−δ cathodes for thin-film solid oxide fuel cells

Benel, Cahit and Darbandi, Azad J. and Djenadic, Ruzica and Evans, Anna and Tölke, René and Prestat, Michel and Hahn, Horst (2013):
Synthesis and characterization of nanoparticulate La0.6Sr0.4CoO3−δ cathodes for thin-film solid oxide fuel cells.
In: Journal of Power Sources, 229Elsevier Science Publishing, pp. 258-264, ISSN 03787753,
[Online-Edition: http://dx.doi.org/10.1016/j.jpowsour.2012.11.149],
[Article]

Abstract

Nanocrystalline La0.6Sr0.4CoO3−δ (LSC) powder with an ultrafine microstructure is synthesized via salt-assisted spray pyrolysis and subsequently stabilized in water-based dispersions. Nanoparticulate cathode thin films of LSC and LSC–GDC (gadolinium doped ceria) nanocomposites (with 10–40 wt% of GDC) are prepared via single step spin coating on yttria stabilized zirconia (YSZ) substrates. In order to prevent the chemical reaction between the cathode and the electrolyte, a thin buffer layer of GDC is deposited using spin coating on the YSZ substrates. The electrochemical performance of the thin film cathodes is measured by impedance spectroscopy on symmetrical cells in the temperature range of 450–650 °C. LSC cathode thin films (250 nm thick) with 30 wt% GDC content exhibit the lowest area specific resistance (ASR) values of 0.32, 0.78 and 2.04 Ω cm2 in ambient air at 650, 600 and 550 °C, respectively.

Item Type: Article
Erschienen: 2013
Creators: Benel, Cahit and Darbandi, Azad J. and Djenadic, Ruzica and Evans, Anna and Tölke, René and Prestat, Michel and Hahn, Horst
Title: Synthesis and characterization of nanoparticulate La0.6Sr0.4CoO3−δ cathodes for thin-film solid oxide fuel cells
Language: English
Abstract:

Nanocrystalline La0.6Sr0.4CoO3−δ (LSC) powder with an ultrafine microstructure is synthesized via salt-assisted spray pyrolysis and subsequently stabilized in water-based dispersions. Nanoparticulate cathode thin films of LSC and LSC–GDC (gadolinium doped ceria) nanocomposites (with 10–40 wt% of GDC) are prepared via single step spin coating on yttria stabilized zirconia (YSZ) substrates. In order to prevent the chemical reaction between the cathode and the electrolyte, a thin buffer layer of GDC is deposited using spin coating on the YSZ substrates. The electrochemical performance of the thin film cathodes is measured by impedance spectroscopy on symmetrical cells in the temperature range of 450–650 °C. LSC cathode thin films (250 nm thick) with 30 wt% GDC content exhibit the lowest area specific resistance (ASR) values of 0.32, 0.78 and 2.04 Ω cm2 in ambient air at 650, 600 and 550 °C, respectively.

Journal or Publication Title: Journal of Power Sources
Volume: 229
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Solid oxide fuel cell (SOFC), Micro-SOFC, La0.6Sr0.4CoO3−δ (LSC), Thin film, Cathode, Salt-assisted spray pyrolysis
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 06 Feb 2014 08:57
Official URL: http://dx.doi.org/10.1016/j.jpowsour.2012.11.149
Identification Number: doi:10.1016/j.jpowsour.2012.11.149
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