Electrochromic nickel hydroxide film has been prepared for the first time, using electrochemical template synthesis with polyvinyl alcohol (PVA) as template. Such advanced Ni(OH)2/PVA composite film has improved adhesion to substrate and can be potentially used for manufacturing flexible electrochromic devices. Films obtained by template cathodic deposition can be stored in a dry state without morphological changes which allows for optimization of manufacturing of complete devices. The optimal

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... oncentration of polyvinyl in electrode position solution has been found 5% wt. It has been demonstrated that polyvinyl forms nanosized 3-D matrix on substrate surface which promotes formation of X-ray amorphous nickel hydroxide and is incorporated into the film. It has been established, that at optimal current density 0.625 mA/cm 2 the deposition rate is 3.87μm/h. By simultaneously recording cyclic voltammogramms and colorization curves high electrochemical and optical properties of films prepared using template synthesis with PVA have been demonstrated, with coloration degree of up to 80%. Significant effect of drying temperature on electrochemical and optical properties of Ni(OH)2/PVA composite films has been demonstrated. Low drying temperature (20° С) results in films with high electrochemical activity and coloration degree. At 90° С a drop in colorization degree has been observed.