
TY  - JOUR
A1  - Badwal, SPS 
A1  - de, Bruin HJ 
T1  - Polarization at the (U<sub>0.7</sub>Y<sub>0.3</sub>)O<sub>2+x</sub>/YSZ interface by impedance dispersion analysis
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1978
VL  - 31
IS  - 11
SP  - 2337
EP  - 2347
KW  - 
UR  - https://doi.org/10.1071/CH9782337 
N2  - UO2+x. and Y2O3 form fluorite-type solid solutions (U2Y1-z)O2+x, which show promise as electrode materials for high-temperature fuel or electrolysis cells. The impedance dispersion behaviour for one such composition has been studied in cells of the type (U0.7Y0.3)02+x/YSZ/(U0.7Y0.3)O2+x, in air, at temperatures between 500 and 900&#176;C, and in the frequency range 5 Hz-500 kHz. The semi-circular arc due to electrode dispersion in the complex impedance plane is depressed substantially below the real axis. Simulation calculations show such behaviour to be due to a strong frequency dependence of the resistor(s) in the equivalent circuit for the electron-transfer reaction. We attribute such behaviour to a complex series of reaction steps at the electrode/electrolyte interface. 
ER  -

