Zn-Co oxide films were prepared by electrochemical deposition under potentiostatic conditions. The effects of synthesis conditions on structure, morphology, composition and electrochemical properties of deposited films were studied by atomic absorption spectroscopy, Fourier transform infrared, X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscopy and photovoltammetry analysis. It has been determined that the as-deposited films are lamellar with intercalated acetate ions, consisting of ZnO and alpha-Co(OH)(2) phases. The annealed films retain the same structure without impurities and consist of wurtzite-type ZnO and spinel-type Co3O4. The photoelectrochemical performance and the specific capacitance of the prepared electrodes were evaluated in 0.1 mol x L-1 NaOH aqueous solutions. The obtained experimental results showed that the values of specific capacitance increase with the increase in the amount of cobalt (hydr)oxide. On the contrary, the photoactivity decreases with the increase in cobalt content in the films.