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.
Published in : Electrochemistry Communications
Volume(Issue) : 12
Issue : 2
Pages : 292
Pages to: 295
Publisher / Ed. Institution : Elsevier Inc.
Issue Date: 2010
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
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 1000 °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.%.
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Institute of Materials and Process Engineering (IMPE)
Publication type: Article in scientific Journal
DOI : 10.1016/j.elecom.2009.12.018
ISSN: 1388-2481
URI: https://digitalcollection.zhaw.ch/handle/11475/2196
Appears in Collections:Publikationen School of Engineering

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