Nontoxic Approach to Porous Carbon Activation from Cassava Peels Using Sodium Thiosulphate for Supercapacitor Applications

Abundantly available cassava peels waste was used to prepare porous activated carbon using a nontoxic activating agent, sodium thiosulphate (Na2S2O3). The activation was done under nitrogen flow at 8000C. The resulting porous carbon showed good surface area of 306 m2g-1. The supercapacitor electrodes fabricated from the activated carbon exhibited excellent electrochemical characteristics; showing a specific capacitance of 93.4 Fg-1 while withstanding excellent performance even up to a voltage window of 1.1V.