Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Identification of oxygen reduction processes at (La,Sr)MnO3 electrode/La9.5Si6O26.25 apatite electrolyte interface of solid oxide fuel cells

    Access Status
    Fulltext not available
    Authors
    Cao, X.
    Jiang, San Ping
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Cao, X. and Jiang, S.P. 2013. Identification of oxygen reduction processes at (La,Sr)MnO3 electrode/La9.5Si6O26.25 apatite electrolyte interface of solid oxide fuel cells. International Journal of Hydrogen Energy. 38: pp. 2421-2431.
    Source Title
    International Journal of Hydrogen Energy
    ISSN
    0360-3199
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/21626
    Collection
    • Curtin Research Publications
    Abstract

    Oxygen reduction reaction of (La,Sr)MnO3 (LSM) cathode on La9.5Si6O26.25 apatite (LSO) electrolyte is studied over the temperature range 750–900 °C and the oxygen partial pressure range 0.01–1 atm by electrochemical impedance spectroscopy. The impedance responses show two separable arcs and are analyzed in terms of two different equivalent circuits with comparable information on the electrode processes at high and low frequencies. The electrode process associated with the high frequency arc (s1) is basically independent of oxygen partial pressure. The activation energy of s1 is 188 ± 15 kJ mol-1 for the O2 reduction reaction on the LSM electrode sintered at 1150 °C, and decreases to 120 kJ mol-1 for the O2 reduction reaction on the LSM electrode sintered at 850 °C, which is close to 80–110 kJ mol-1 observed for the same electrode process at LSM/YSZ interface. The reaction order with respect to PO2 and the activation energy of the electrode process associated with low frequency arc (s2) are generally close to that of s2 at the LSM/YSZ interface. The activation process of the cathodic polarization treatment is noticeably slower for the reaction at LSM/LSO interface as compared to that at LSM/YSZ interface. The impedance responses of O2 reduction reaction at the LSM/LSO interface are significantly higher than that at the LSM/YSZ interface due to the silicon spreading. The impedance responses decrease with the decrease of the sintering temperature of LSM electrode on LSO electrolyte. At the sintering temperature of 1000 °C, the impedance responses of O2 reduction reaction is 1.74 O cm2 at 900 °C, which is significantly smaller than that of LSM electrode sintered at 1150 °C.

    Related items

    Showing items related by title, author, creator and subject.

    • In situ assembled La0.8Sr0.2MnO3 cathodes on a Y2O3-ZrO2 electrolyte of solid oxide fuel cells-interface and electrochemical activity
      Li, N.; Ai, N.; Chen, K.; Cheng, Yi; He, S.; Saunders, M.; Dodd, A.; Suvorova, A.; Jiang, S. (2016)
      © 2016 The Royal Society of Chemistry.Formation of an intimate electrode/electrolyte interface is essential for solid oxide fuel cells (SOFCs). In this study, a comparative investigation has been undertaken to study the ...
    • A FIB-STEM study of La0.8Sr0.2MnO3 Cathode and Y2O3-ZrO2/Gd2O3-CeO2 electrolyte interfaces of solid oxide fuel cells
      He, Shuai; Chen, K.; Saunders, M.; Li, J.; Cui, C.; Jiang, San Ping (2017)
      © 2017 The Electrochemical Society. All rights reserved. The interfaces between cathode and electrolyte in solid oxide fuel cells (SOFCs) play a critical role in the overall performance and durability, and are generally ...
    • Oxygen reduction reaction at (La,Sr) (Co,Fe)O3-d electrode/La9.5Si6O26.25 apatite electrolyte interface of solid oxide fuel cells
      Cao, X.; Jiang, San Ping (2015)
      © 2015 Hydrogen Energy Publications, LLC. Oxygen reduction reaction (ORR) of La0.8Sr0.2Co0.5Fe0.5O3-d (LSCF) cathode on La9.5Si6O26.25 (LSO) apatite electrolyte is studied by electrochemical impedance spectroscopy over ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.