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Transition metal oxides have applications into energy storage devices such as electrochemical supercapacitors. We deposited nickel oxide (NiO) thin films using electrodeposition under direct and pulse potentiometry. Effects of the pulse electrodeposition conditions are systematically investigated. Results show that the pulse time clearly influences the morphology of the deposited thin films. The nanostructured thin film that was deposited under 1 sec on-time condition proved to be a suitable electrode material since its 1000 Fg -1 at 0.5 Ag -1 specific capacitance is large enough to fulfil the needed requirement. In addition, the thin film at hand shows 90.1% capacity retention during 800 galvanostatic charge-discharge cycles under 5 Ag −1 current density. Moreover, nanostructured NiO films prepared by pulse electrodeposition demonstrate high power performance, excellent rate as well as long term cycling stability, which make them promising electrode materials for supercapacitor applications.

Polypyrrole (PPy)-indium phosphide (InP) composite material was electrochemically prepared by the incorporation of InP into a PPy matrix during electrochemical synthesis (cycling) under magnetic stirring from the acetonitrile/LiClO4 electrolyte containing the Py and InP particles. The PPy-InP composite material was designed to explore new approaches to improve light-collection efficiency in polymer photovoltaic. The samples were characterised by cyclic voltammetry, impedance spectroscopy measurement, scanning electron microscopy, energy dispersive X-ray spectroscopy, UV-visible and photoelectrochemical measurements. It was observed that the photocurrent of the composites was higher than that of the single PPy films and increased with InP concentration. The study showed that the presence of InP particles in the polymeric film improves the optical and the photovoltaic properties of PPy and give information on the use possibility of these films for photovoltaic cells' application.

A composite material of polybithiophene (PBTh) and β-MnO 2 was prepared by electrodeposition of organic conducting polymer on β-MnO 2 surface in 0.1 M LiClO 4 / 0.01 M BTh/CH 3 CN. Synthesized material was characterized by using various techniques, i.e., X-ray diffractometry (XRD), scanning electron microscopy (SEM), and magnetic measurements (SQUID). Electrochemical features of oxygen reduction reaction were investigated using cyclic voltammetry on β-MnO 2 and PBTh/β-MnO 2 electrode, and chronopotentiometry tests were carried out at different currents. The results show that peak current and potential of oxygen reduction are changed for β-MnO 2 modified by polybithiophene.

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