Title of article
Oxygen diffusion in Sr0.75Y0.25CoO2.62
Author/Authors
Rupasov، نويسنده , , D.P. and Berenov، نويسنده , , A.V. and Kilner، نويسنده , , J.A. and Istomin، نويسنده , , S.Ya. and Antipov، نويسنده , , E.V.، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2011
Pages
7
From page
18
To page
24
Abstract
Oxygen tracer diffusion in polycrystalline samples of Sr0.75Y0.25CoO2.62 (SYC) was studied by Isotope Exchange Depth Profile and Secondary Ion Mass Spectrometry (IEDP/SIMS). The values of the tracer diffusion coefficient, D*, and the surface exchange coefficient, k*, were measured as a function of temperature (500–900 °C). We observed an Arrhenius behavior, A = A0 exp(− EA/kT), with the activation energies of EAD = 1.58 ± 0.05 eV and EAk = 1.79 ± 0.27 eV for D* and k*, respectively. Electrochemical performance of symmetrical cells with Ce0.9Gd0.1O1.95 (CGO) as electrolyte (SYC/CGO/SYC) in the temperature range 620–770 °C has been evaluated. An area-specific resistance (ASR) of 0.17 Ω cm2 was measured at 720 °C.
Keywords
SIMS , perovskites , SOFC , oxygen diffusion , cathode
Journal title
Solid State Ionics
Serial Year
2011
Journal title
Solid State Ionics
Record number
1710932
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