Storage of energy in supercapacitors from nanotubes

Different types of nanotubular carbon materials have been used for storage of energy in supercapacitors. Application of various multi-walled and single walled nanotubes as electrodes for capacitors proved the high ability of these materials for the accumulation of charges in electrode/electrolyte interface due to their unique mesoporosity. Apart from electrostatic attraction, pseudocapacitance reactions have been observed because of functionalization of nanotubes, deposition of conducting polypyrrole or presence of metallic particles. The values of capacitance obtained from modified nanotube electrodes varied from 20 to 170 F/g.