Nanocomposite of multilayer fullerenes with transition metal oxide nanoparticles and a process for the preparation thereof

A process for preparation of a supercapacitor nanocomposite, wherein the said process comprises:

• i. collecting thermal black carbon on a glass or ceramic plate directly from a flame of a burning ghee;
• ii. annealing the thermal black carbon obtained in step (i) at a temperature of 800° C. under an inert atmosphere to obtain an activated multilayer fullerene in a nano-onions form (CNOs);
• iii. dispersing the activated multilayer fullerene in the nano-onions form (CNOs) obtained in step (ii) in water, then adding KMnO4 followed by sonication;
• iv. subjecting the mixture obtained from step (iii) to a hydrothermal reaction in a microwave oven at a radiation ranging between 200 W at a temperature of about 130° C. for a period of 15 minutes;
• v. cooling the mixture obtained in step (iv) followed by separating a composite by a vacuum filter to a obtain nanocomposite;
• and
• vi. annealing the nanocomposite obtained from step (v) at a temperature of 800° C. under an inert gas for a period of 4 hours to obtain a supercapacitor nanocomposite.