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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Applied Energyarrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Applied Energy
Article . 2013 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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Optimizing solid oxide fuel cell cathode processing route for intermediate temperature operation

Authors: Ortiz-Vitoriano, N.; Bernuy-Lopez, C.; Ruiz de Larramendi, I.; Knibbe, R.; Thyden, K.; Hauch, A.; Holtappels, P.; +1 Authors

Optimizing solid oxide fuel cell cathode processing route for intermediate temperature operation

Abstract

Abstract For Solid Oxide Fuel Cells (SOFCs) to become an economically attractive energy conversion technology suitable materials which allow operation at lower temperatures, while retaining cell performance, must be developed. At the same time, the cell components must be inexpensive – requiring both low-priced raw material and cost-effective production techniques. In this work the perovskite-type La0.6Ca0.4Fe0.8Ni0.2O3 (LCFN) oxide has been used in order to optimize intermediate temperature SOFC cathode processing route. The advantages this material presents arise from the low temperature powder calcination (∼600 °C) and electrode sintering (∼800 °C) of LCFN electrodes, making them a cheaper alternative to conventional SOFC cathodes. An electrode polarization resistance as low as 0.10 Ω cm2 at 800 °C is reported, as determined by impedance spectroscopy studies of symmetrical cells sintered at a range of temperatures (800–1000 °C). Scanning Electron Microscopy (SEM) studies revealed porous electrode microstructures, even when sintered at a temperature of just 800 °C. The competitive performance of the electrodes sintered at low temperatures, combined with the low raw material cost, make these electrodes an excellent potential choice for SOFC cathodes. In this work a new cathode processing technique is presented which provides a more economical, lower temperature SOFC production route with no detrimental effect on device efficiency.

Country
Australia
Keywords

2100 Energy, Monitoring, Policy and Law, 2210 Mechanical Engineering, Perovskite, 2215 Building and Construction, Solid oxide fuel cell, 2308 Management, Cathode, Electrochemical impedance spectroscopy, Microstructure

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