▎ 摘　　要

NOVELTY - Method of making cassava leaf extract/graphene and polyvinyl alcohol (PVA) composite as organic supercapacitors, involves (a) crushing 100 g cassava leaves with mortar, taking 20 ml extract, adding 4 ml methanol, 1 ml acetic acid and 5 ml distilled water, macerating, filtering using a gauze paper and removing the residue, and concentrating the filtrate using a rotary evaporator to form a thick extract, (b) dissolving 50 wt.% cassava leaf extract with 35 wt.% PVA and 15 wt.% graphene powder, and stirring at room temperature for 6 hours using a hot plate stirrer and magnetic thermo scientific bar at a speed of 300 rpm, (c) repeating the same step with different concentrations in the composition of cassava leaf extract with the randomized complete design system, such as 50 wt.%, 55 wt.%, 60 wt.%, 65 wt.% and 70 wt.%, and (d) pouring the homogeneous solution into Normax petri dish and drying in an oven at 60 degrees C for 12 hours to obtain the product. USE - Method of making cassava leaf extract/graphene and PVA composite as organic supercapacitors. ADVANTAGE - The method produces organic supercapacitors that absorb, store and distribute electrical energy and are biodegradable, biocompatible and nontoxic. The organic supercapacitors have high dielectric value of 3.834x 108, capacitance of 7.33 mF, electrical conductivity of 6512 S/m, thus resulting in electrical energy storing performance with supply current of 2 A, energy density of 7.11 J/kg and power density of 987.27 J/kg.second. The method reduces electronic waste.