Specific Features of the Electrochemical Synthesis of Thin CNTS Films Supported by Titanium and Tantalum Foils

The peculiarities of the electrochemical deposition of a copper layer on flexible titanium and tantalum supports as well as the modes of sequential electrochemical deposition of a tin layer on Cu/Ti and Cu/Ta supports and a nickel layer on the Sn/Cu/Ti and Sn/Cu/Ta supports are studied by cyclic voltammetry from the corresponding electrolyte solutions. The deposition potentials are found for each metal layer with regard to the support type. A wide series of stable precursor films Cu–Sn–Ni/Ti and Cu–Sn–Ni/Ta are obtained. The stage of annealing in the active sulfur atmosphere (sulfurization) is optimized aimed at the synthesis of stable compounds Cu2NiSnS4. Based on data obtained by the methods of XRD and Raman spectroscopy, it is shown that the synthesis of stable single-phase compounds Cu2NiSnS4 with the polycrystalline structure on the Ta and Ti supports requires that the annealing in the active sulfur atmosphere carried out at 550°С for 60 min.