Investigation of the supercapacitor behavior of MoS2 and Fe-doped MoS2 nano-flowers synthesized using the hydrothermal method. (24th October 2022)

• Record Type: Journal Article
• Authors: Hanifehpour, Younes; Abdolmaleki, Mehdi; Moradi, Negar; Farhood, A. H. S.; Ahmadiyeh, Somayeh; Allahgholipour, Gholam Reza; Hosseini, Javad
• Is Part Of: New journal of chemistry. Volume 46:Number 43(2022)
• Page Start: 20932
• Page End: 20939
• Publication Date: 2022-10-24
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj03706h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Flower-like nanosheets of Fe-doped MoS2 with high porosity exhibit better electrochemical activities in supercapacitors. Abstract : Flower-like nanosheets of pure molybdenum disulfide (MoS2 ) and Fe-doped MoS2 (FM) with 2, 4 and 8% atomic-doped iron of FM-2, FM-4 and FM-8, respectively, were successfully synthesized using the hydrothermal method. The effect of iron doping on the MoS2 morphology, composition, and supercapacitor behavior are systematically investigated. In the Fe-doped MoS2 samples, iron atoms replaced the molybdenum atoms in the MoS2 structure through the hydrothermal process. Cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) measurements were conducted on a three-electrode system to evaluate the electrochemical performance of the electrodes. The specific capacitance of the FM-2 electrode was 240 F g −1 at a 10 mV s −1 CV scan rate, which was higher than that of the pure MoS2 and the other two Fe-doped MoS2 electrodes. Furthermore, EIS tests exhibited that doping iron in the MoS2 structure contributes to a rapid decline in charge transfer resistance and, therefore, a higher probability of energy storage. The results revealed that the synthesized Fe-doped MoS2 samples are potential electrode materials for future energy storage devices.