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

Satiye Korkmaz ()
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Satiye Korkmaz: Department of Electrical and Electronics Engineering, Faculty of Engineering, Karabük University, Balıklarkayası Mevkii, 78050 Karabük, Turkey

Surface Review and Letters (SRL), 2022, vol. 29, issue 12, 1-7

Abstract: This study investigated the supercapacitor performance of the MAPbI3/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 MAPbI3 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 −0.5–2 V at 25, 50, 75, and 100 mV/s scan rates. The maximum specific capacitance was 845.03 F/g at 25 mV/s. The electrode’s capacitance ratios to the capacitance at 100 mV/s were calculated as 25.8%, 37.3%, and 54.6% for 25, 50, and 75 mV/s scan rates, respectively. Current–voltage cycles are important because they show that the electrode has a stable structure.

Keywords: Perovskite; multiwalled carbon nanotube; supercapacitor electrode; specific capacitance; in-plane time-dependent I–V method (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1142/S0218625X22501633

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