Development of electrochemical supercapacitors using underpotential deposition of thallium on silver

The design of electrochemical supercapacitors exploiting the concept of underpotential deposition (UPD) is demonstrated using the UPD of thallium on silver as an illustrative example. The specific capacitance is deduced as 3.45×102 Farads g-1 from cyclic voltammetric studies employing the roughness factor for calculating the electroactive surface area.