IMPEDANCE AND SIMULATION STUDIES OF THE CELL ELECTRODE HYDROUS ANTIMONIC ACID ELECTRODE

Measurements of the impedance of the cells Pt/HAA/Pt and C/HAA/C were carried out at temperatures between -80 and 40°C in a high frequency range by a Hewlett Packard instrument and in a low frequency range by a Zahner-elektrik instrument. The solid electrolyte had the composition HSbO3 · 1.1 H2O. The bulk resistance of the solid electrolyte is mainly determined by the grain boundary resistance The frequency simulation by a simple analogue circuit works fairly well. The bulk resistance can be determined in a good approximation by graphical extrapolation or by the simulation procedure. The values of the other elements of the analogue circuit depend upon the electrode material and the frequency range used in the simulation. An interpretation of these elements is difficult. © 1990.