Effects of using (La0.8Sr0.2)0.95Fe0.6Mn0.3Co0.1O3 (LSFMC), LaNi0.6Fe0.4O3−δ (LNF) and LaNi0.6Co0.4O3−δ (LNC) as contact materials on solid oxide fuel cells
| Autor: | María I. Arriortua, Karmele Vidal, Aitor Larrañaga, Miguel A. Laguna-Bercero, Aroa Morán-Ruiz |
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| Přispěvatelé: | Eusko Jaurlaritza, Ministerio de Ciencia e Innovación (España), European Commission, Universidad del País Vasco, Corporación MONDRAGON |
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Electrical contact Renewable Energy Sustainability and the Environment Contact resistance Energy Engineering and Power Technology Conductivity Electrical contacts Cathode law.invention Electrical resistance and conductance Electrical resistivity and conductivity law visual_art Interconnect Contact perovskite visual_art.visual_art_medium SOFC Ceramic Ohmic resistance losses Electrical and Electronic Engineering Physical and Theoretical Chemistry Composite material Perovskite (structure) |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2013.10.031 |
| Popis: | Three lanthanum-based perovskite ceramic compounds were studied as contact materials, (La0.8Sr0.2)0.95Fe 0.6Mn0.3Co0.1O3 (LSFMC), LaNi 0.6Fe0.4O3-δ (LNF) and LaNi 0.6Co0.4O3-δ (LNC), between a Crofer22APU interconnect and a La0.6Sr0.4FeO3 (LSF) cathode. The layers were deposited using in all cases wet colloidal spray technique. Phase structures of materials were checked by X-ray Diffraction (XRD) measurements. Electrical conductivity and thermal expansion coefficient (TEC) for these selected compounds were also determined. The important properties of the resulting {interconnect/contact layer/cathode} systems; including area specific resistance (ASR), reactivity, and adhesion of contact materials to the interconnect and to the cathode were investigated. Moreover, the electrical resistance and reactivity of the system without a contact layer, {steel/LSF/LSF} system, was measured for comparison. The contact resistance is strongly influenced by the conductivity of selected contact materials, showing the lowest ASR values for {Crofer22APU/LNC/LSF} assembly. The point microanalysis on cross-section of the systems, after ASR measurements, reveals that there is chromium enrichment in the contact and cathode layers which allows the formation of phases like SrCrO4 and Cr-containing perovskite in short exposure times. An adequate integrity and low reactivity is achieved when LNF contact coating is applied between Crofer22APU and LSF cathode without compromising the contact resistance of the system. © 2013 Elsevier B.V. All rights reserved. This research has been funded by the Consejería de Industria, Innovación, Comercio y Turismo (SAIOTEK 2012 programmes), by Dpto. Educación, Política Lingüística y Cultura of the Basque Goverment (IT-630-13) and by Ministerio de Ciencia e Innovación (MAT2010-15375 and MAT2012-30763). The authors thank Ikerlan's Fuel Cell group and SGIker technical support (UPV/EHU, MEC, GV/EJ and European Social Fund). A. Morán-Ruiz thanks UPV/EHU for funding her PhD work. |
| Databáze: | OpenAIRE |
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