Electrochemistry is one of the leading branch involved in the research of physics and chemistry especially in thin film preparation for supercapacitor electrodes and oxidation reduction for the synthesis of drugs. Supercapacitor has high power density than batteries and large energy density compared to conventional capacitor. Hence supercapacitor has lot of demand in energy related device technologies. Its market cost increasing day by day. There is a need to search an alternative material for its electrode to make its price down. Electrochemical analysis is the useful tool to characterize the electrode material through power and energy application point of view. Present book focus on cost effective use of optimized cadmium oxide as a electrode material in supercapacitor.