Compact supercapacitor based on narrow diameter SWCNTs and its calculation of surface area and capacitance

Abstract

Supercapacitor is the fastest growing technology which is playing very effective part in energy storage devices. They are capable of delivering high power and energy. Among abundant available high surface area carbon materials, carbon nanotubes (CNTs) are utilized as electrode material in supercapacitors because of their regular structure which provides easy access to ions to store electric energy. CNTs with larger diameters are used in supercapacitor but they provide less density of tubes in volume which results in smaller capacitance value. Smaller diameter CNTs not only increases the density of the tubes but also increase storage capability of device. In this work we present the calculation of surface area and capacitance of 1 nm small diameter single walled carbon nanotubes (SWCNTs). Accelrys material studio was used to build the SWCNTs and to calculate the different parameters. Result show that not only the density of SWCNTs on the substrate was increased but also high capacitance values were observed as compared to the larger diameter tubes.