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Low cost and very simple activation method (KOH as activating agent) is used for the synthesis of activated carbon derived from the biomass manihot esculenta crantz (mocaf). The mocaf derived activated carbon as electrode material in supercapacitor and characterized by SEM for to analyse the morphology, Brunauer-Emmet-Teller to know the surface area and to measure the electrochemical performance characterized by Cyclic voltammetry, Galvanostatic charge-discharge and Electrochemical impendance spectroscopy. Electrochemical studies indicate that the mocaf delivers the maximum specific capacitance of (36 F/g) at scan rate (5 mV/s) in aqueous electrolyte (1 M LiPF6) for (2.0 V) operating voltage. The electrodes from mocaf exhibits good rate capability with an excellent charging/ discharging cycle stability in aqueous electrolyte (1 M LiPF6) during 10.000 cycles. The results indicate that mocaf shows good electrochemical properties to be used for energy storage application.