Supercapacitor has high power density than batteries and high 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 one of the useful tool to characterize the electrode material through power and energy application point of view. Present book focus both on the cost effective preparation of Transparent Conducting Oxide (TCO) electrodes by spray pyrolysis and its use in supercapacitor.