The proposed research is focused to preparation and characterization of thin films of electrochemically active inorganic and organic materials at conductive substrates with a general aim of defining 1) a close relationship between chemical composition, morphological and structural characteristics, fundamental physical processes (transfer, transport and accumulation of charges) and electrochemical activity of prepared films and 2) stable, highly-efficient and durable electroactive materials that could be applied in a “new class” of ecologically acceptable energy conversion and storage devices (fuel cells and electrochemical supercapacitors).