RuO2 electrodes were prepared by polymeric precursor method. Initially the composition variables were investigated using a factorial design and in a second step the calcination temperature was studied between 250 and 600°C. Cyclic voltammograms in acid medium show no changes in the profile for different preparation temperature. On the other hand, a high decrease of the current density occurs as the calcination temperature is increased. Consequently, the specific capacitance of the electrodes also decreases. Specific capacitances of 70Fg−1 were obtained for films prepared at 250°C.