Effect of graphite pore former on oxygen electrodes prepared with La0.6Sr0.4CoO3−δ nanoparticles

Prestat, Michel; Morandi, A.; Heel, Andre; Holzer, Lorenz; Holtappels, Peter; Graule, Thomas J.

doi:10.1016/j.elecom.2009.12.018

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Effect of graphite pore former on oxygen electrodes prepared with La0.6Sr0.4CoO3−δ nanoparticles
Authors:	Prestat, Michel Morandi, A. Heel, Andre Holzer, Lorenz Holtappels, Peter Graule, Thomas J.
DOI:	10.1016/j.elecom.2009.12.018
Published in:	Electrochemistry Communications
Volume(Issue):	12
Issue:	2
Page(s):	292
Pages to:	295
Issue Date:	2010
Publisher / Ed. Institution:	Elsevier
ISSN:	1388-2481
Language:	English
Subjects:	Map
Subject (DDC):	540: Chemistry 620.11: Engineering materials
Abstract:	This study aimed at fabricating porous crack-free and delamination-free La0.6Sr0.4CoO3−δ electrodes using nanopowders and investigating oxygen reduction (occurring at solid oxide fuel cell cathodes) and oxygen evolution (occurring at solid oxide electrolysis cell anodes) at 600°C in air. The electrodes were deposited by screen-printing on Ce0.8Gd0.2O1.9 substrates. The pastes were prepared with nanoparticles synthesised by flame spray synthesis and graphite pore former. Without graphite, the electrodes sintered at 100°C exhibit relatively low porosity and significant densification which led to partial delamination and large overpotentials. The addition of graphite, which was removed by combustion at ca. 650°C during sintering, markedly improves electrode performance by increasing porosity and reducing densification. A minimal overpotential for both the oxygen reduction and oxygen evolution was reached for a layer porosity of ca. 50-60 vol.%.
URI:	https://digitalcollection.zhaw.ch/handle/11475/2196
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Engineering
Organisational Unit:	Institute of Computational Physics (ICP) Institute of Materials and Process Engineering (IMPE)
Appears in collections:	Publikationen School of Engineering

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Prestat, M., Morandi, A., Heel, A., Holzer, L., Holtappels, P., & Graule, T. J. (2010). Effect of graphite pore former on oxygen electrodes prepared with La0.6Sr0.4CoO3−δ nanoparticles. Electrochemistry Communications, 12(2), 292–295. https://doi.org/10.1016/j.elecom.2009.12.018

Prestat, M. et al. (2010) ‘Effect of graphite pore former on oxygen electrodes prepared with La0.6Sr0.4CoO3−δ nanoparticles’, Electrochemistry Communications, 12(2), pp. 292–295. Available at: https://doi.org/10.1016/j.elecom.2009.12.018.

M. Prestat, A. Morandi, A. Heel, L. Holzer, P. Holtappels, and T. J. Graule, “Effect of graphite pore former on oxygen electrodes prepared with La0.6Sr0.4CoO3−δ nanoparticles,” Electrochemistry Communications, vol. 12, no. 2, pp. 292–295, 2010, doi: 10.1016/j.elecom.2009.12.018.

PRESTAT, Michel, A. MORANDI, Andre HEEL, Lorenz HOLZER, Peter HOLTAPPELS und Thomas J. GRAULE, 2010. Effect of graphite pore former on oxygen electrodes prepared with La0.6Sr0.4CoO3−δ nanoparticles. Electrochemistry Communications. 2010. Bd. 12, Nr. 2, S. 292–295. DOI 10.1016/j.elecom.2009.12.018

Prestat, Michel, A. Morandi, Andre Heel, Lorenz Holzer, Peter Holtappels, and Thomas J. Graule. 2010. “Effect of Graphite Pore Former on Oxygen Electrodes Prepared with La0.6Sr0.4CoO3−δ Nanoparticles.” Electrochemistry Communications 12 (2): 292–95. https://doi.org/10.1016/j.elecom.2009.12.018.

Prestat, Michel, et al. “Effect of Graphite Pore Former on Oxygen Electrodes Prepared with La0.6Sr0.4CoO3−δ Nanoparticles.” Electrochemistry Communications, vol. 12, no. 2, 2010, pp. 292–95, https://doi.org/10.1016/j.elecom.2009.12.018.