Research

Vacancy and interstitial oxide ion migration in heavily doped La 2-xSr xCoO 4±δ


Reference:

Tealdi, C., Ferrara, C., Mustarelli, P. and Islam, M. S., 2012. Vacancy and interstitial oxide ion migration in heavily doped La 2-xSr xCoO 4±δ. Journal of Materials Chemistry, 22 (18), pp. 8969-8975.

Related documents:

[img]
Preview
PDF (Islam_JMC_2012_22_18_8969.pdf) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (1056kB) | Preview

    Official URL:

    http://dx.doi.org/10.1039/c2jm30769c

    Abstract

    La 2-xSr xCoO 4±δ, a K 2NiF 4-type structured oxide, is currently under investigation for its possible application as a cathode material in solid oxide fuel cells operating at intermediate temperature (IT-SOFCs). Here we report a combined energy minimization and molecular dynamics study of oxygen migration mechanisms in the La 2-xSr xCoO 4±δ material for high Sr levels (x > 0.8). In the oxygen-deficient composition La 0.8Sr 1.2CoO 3.9 the oxide-ion transport mainly occurs through the migration of oxygen vacancies within the perovskite layer of the structure, with possible vacancy paths between adjacent layers. In the oxygen-rich composition La 1.2Sr 0.8CoO 4.1 interstitial oxygen transport is via an interstitialcy mechanism and within the ab plane.

    Details

    Item Type Articles
    CreatorsTealdi, C., Ferrara, C., Mustarelli, P. and Islam, M. S.
    DOI10.1039/c2jm30769c
    DepartmentsFaculty of Science > Chemistry
    RefereedYes
    StatusPublished
    ID Code29759

    Export

    Actions (login required)

    View Item

    Document Downloads

    More statistics for this item...