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dc.contributor.authorHeel, Andre-
dc.contributor.authorHoltappels, P.-
dc.contributor.authorHug, P.-
dc.contributor.authorGraule, T.-
dc.date.accessioned2018-08-20T14:23:50Z-
dc.date.available2018-08-20T14:23:50Z-
dc.date.issued2010-
dc.identifier.issn1615-6846de_CH
dc.identifier.issn1615-6854de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/9267-
dc.description.abstractA single-step gas phase process, based on a liquid-fed flame spray synthesis (FSS) technique is presented, which allows a precise control of particle size and particle stoichiometry for the processing of nanostructured cathode layers. Crystalline La0.6Sr0.4Co0.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ nanopowders, two mixed ionic-electronically conducting perovskite compositions for intermediate temperature cathodes were synthesised from aqueous solutions of cost-effective nitrates with production rates up to 400 g h-1. By controlling the processing parameters, a specific surface area (SSA) of 12-48 m2g-1 corresponding to Brunauer-Emmett-Teller (BET) equivalent particle diameter from 20-100 nm were synthesised. The influence of process parameters like production rate and solvent composition on size, morphology, crystal structure and phase purity were investigated by BET, high resolution electron microscopy (HR-TEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Dilatometry was used to determine the thermal expansion coefficient (TEC) and shrinkage behaviour as a function of particle size. A pronounced shift towards lower temperatures for the onset of shrinkage is observed for the nanoscale materials. Electrochemical performance and degradation was analysed by conductivity measurements as well as thermogravimetric analysis (TGA) under different atmospheres. CO2 was identified as a critical parameter in terms of carbonate formation from Ba0.5Sr0.5Co0.8Fe0.2O3-δ and causes a strong increase in the material resistivity, whereas La0.6Sr0.4Co0.2Fe0.8O3-δ is unaffected. The oxygen exchange kinetic of both compositions is affected by CO2 containing atmospheres.de_CH
dc.language.isoende_CH
dc.publisherWileyde_CH
dc.relation.ispartofFuel Cellsde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectBa0.5Sr0.5Co0.8Fe0.2O3-δde_CH
dc.subjectLa0.6Sr0.4Co0.2Fe0.8O3-δde_CH
dc.subjectCathodede_CH
dc.subjectCO2de_CH
dc.subjectFlame spray synthesisde_CH
dc.subjectSOFCde_CH
dc.subjectNanode_CH
dc.subject.ddc621.3: Elektro-, Kommunikations-, Steuerungs- und Regelungstechnikde_CH
dc.subject.ddc660: Technische Chemiede_CH
dc.titleFlame spray synthesis of nanoscale La0.6Sr0.4Co0.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ as cathode materials for intermediate temperature solid oxide fuel cellsde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitute of Materials and Process Engineering (IMPE)de_CH
dc.identifier.doi10.1002/fuce.200900093de_CH
zhaw.funding.euNode_CH
zhaw.issue3de_CH
zhaw.originated.zhawNode_CH
zhaw.pages.end432de_CH
zhaw.pages.start419de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume10de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
zhaw.webfeedProzesstechnikde_CH
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Heel, A., Holtappels, P., Hug, P., & Graule, T. (2010). Flame spray synthesis of nanoscale La0.6Sr0.4Co0.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ as cathode materials for intermediate temperature solid oxide fuel cells. Fuel Cells, 10(3), 419–432. https://doi.org/10.1002/fuce.200900093
Heel, A. et al. (2010) ‘Flame spray synthesis of nanoscale La0.6Sr0.4Co0.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ as cathode materials for intermediate temperature solid oxide fuel cells’, Fuel Cells, 10(3), pp. 419–432. Available at: https://doi.org/10.1002/fuce.200900093.
A. Heel, P. Holtappels, P. Hug, and T. Graule, “Flame spray synthesis of nanoscale La0.6Sr0.4Co0.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ as cathode materials for intermediate temperature solid oxide fuel cells,” Fuel Cells, vol. 10, no. 3, pp. 419–432, 2010, doi: 10.1002/fuce.200900093.
HEEL, Andre, P. HOLTAPPELS, P. HUG und T. GRAULE, 2010. Flame spray synthesis of nanoscale La0.6Sr0.4Co0.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ as cathode materials for intermediate temperature solid oxide fuel cells. Fuel Cells. 2010. Bd. 10, Nr. 3, S. 419–432. DOI 10.1002/fuce.200900093
Heel, Andre, P. Holtappels, P. Hug, and T. Graule. 2010. “Flame Spray Synthesis of Nanoscale La0.6Sr0.4Co0.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ as Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells.” Fuel Cells 10 (3): 419–32. https://doi.org/10.1002/fuce.200900093.
Heel, Andre, et al. “Flame Spray Synthesis of Nanoscale La0.6Sr0.4Co0.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ as Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells.” Fuel Cells, vol. 10, no. 3, 2010, pp. 419–32, https://doi.org/10.1002/fuce.200900093.


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