1 Ocak 2020 Dergi makalesi Açık Erişim

Demirkal, Emrah; Ozdemir, Okan; Arslan, Leyla Colakerol; Buyukaksoy, Aligul

DataCite XML

<?xml version='1.0' encoding='utf-8'?>
<resource xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://datacite.org/schema/kernel-4" xsi:schemaLocation="http://datacite.org/schema/kernel-4 http://schema.datacite.org/meta/kernel-4.1/metadata.xsd">
  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/10615</identifier>
  <creators>
    <creator>
      <creatorName>Demirkal, Emrah</creatorName>
      <givenName>Emrah</givenName>
      <familyName>Demirkal</familyName>
      <affiliation>Gebze Tech Univ, Dept Mat Sci &amp; Engn, TR-41400 Kocaeli, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Ozdemir, Okan</creatorName>
      <givenName>Okan</givenName>
      <familyName>Ozdemir</familyName>
      <affiliation>Gebze Tech Univ, Inst Nanotechnol, TR-41400 Kocaeli, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Arslan, Leyla Colakerol</creatorName>
      <givenName>Leyla Colakerol</givenName>
      <familyName>Arslan</familyName>
    </creator>
    <creator>
      <creatorName>Buyukaksoy, Aligul</creatorName>
      <givenName>Aligul</givenName>
      <familyName>Buyukaksoy</familyName>
    </creator>
  </creators>
  <titles>
    <title>Sources Of Performance Degradation In Thin Film La0.6Sr0.4Feo3 Air Electrodes</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2020</publicationYear>
  <dates>
    <date dateType="Issued">2020-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/10615</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1016/j.ssi.2020.115420</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">Origins of long-term oxygen reduction activity degradation at 700 degrees C in polymeric precursor-derived La0.6Sr0.4FeO3 (LSF) thin film cathodes were investigated. Electrochemical impedance spectroscopy measurements revealed that the LSF thin films pre-calcined at 900 degrees C (LSF-900) exhibited much faster electrochemical activity loss than did LSF pre-calcined at 700 degrees C (LSF-700). As similar losses in surface area were determined upon scanning electron microscopy image analyses of samples, microstructure evolution was excluded as a possible reason for the difference in degradation rates. Upon X-ray diffraction analyses and comparison of results with literature, it was suggested that small amounts of Ruddlesden-Popper type (La, Sr)(2)FeO4 (214) phases were present throughout the 100 hour exposure of both LSF-700 and LSF-900 to 700 degrees C, thus not affecting the long-term performance degradation rates. X-ray photoelectron spectroscopy analyses revealed that the ratio of surface-bound Sr to the lattice-bound one increased significantly in LSF-900, suggesting electrochemically inactive SrO/Sr(OH)(2)/SrCO3 rich layer formation and thus contributing to fast activity loss. Overall, it was established that microstructural evolution was not the sole source of degradation in LSF-based cathodes. Since LSF thin films deposited by a solution precursor onto YSZ electrolytes constitute a model structure, the results obtained in the present study can also provide useful information on the degradation of LSF-YSZ composite cathodes prepared by LSF infiltration into YSZ scaffolds.</description>
  </descriptions>
</resource>