A HIGH-PERFORMANCE ELECTRODE FOR SUPERCAPACITORS: CH3NH3PbI3 PEROVSKITE/MULTIWALLED CARBON NANOTUBE (MAPbI3/MWCNT) COMPOSITES

This study investigated the supercapacitor performance of the MAPbI(3)/MWCNT composite electrode produced by spin coating. The produced electrode's structural properties and surface morphology were analyzed by FESEM, EDX, XRD, and FTIR. Filling the voids in the MWCNT structure by MAPbI(3) perovskite crystals increases the charge density but provides ease of charge transport. The supercapacitor electrode performance was determined using specific capacitances calculated from current-voltage measurements in the potential range of -0.5-2V at 25, 50, 75, and 100mV/s scan rates. The maximum specific capacitance was 845.03F/g at 25mV/s. The electrode's capacitance ratios to the capacitance at 100mV/s were calculated as 25.8%, 37.3%, and 54.6% for 25, 50, and 75mV/s scan rates, respectively. Current-voltage cycles are important because they show that the electrode has a stable structure.