Oxygen diffusion in Sr0.75Y0.25CoO2.62

D. P. Rupasov, A. V. Berenov, J. A. Kilner, S. Ya Istomin, E. V. Antipov

Результат исследований: Вклад в журналСтатьярецензирование

17 Цитирования (Scopus)


Oxygen tracer diffusion in polycrystalline samples of Sr 0.75Y0.25CoO2.62 (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(- E A/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.

Язык оригиналаАнглийский
Страницы (с-по)18-24
Число страниц7
ЖурналSolid State Ionics
Номер выпуска1
СостояниеОпубликовано - 25 авг. 2011
Опубликовано для внешнего пользованияДа


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