Specific Capacitance Enhancement of Metal–Organic Framework (MOF) by Boosting Intramolecular Charge Transfer Mechanism

Abstract

Energy storage is very important for the forthcoming future; hence, the overview of innovative materials in this research area is necessary. Here, two metal–organic framework (MOF) materials are described thoroughly, which is highly required because few MOFs are available only on high-performance supercapacitors. The melamine-, manganese-, and molybdenum-based MOF materials, such as Me-Mn-MOFs and Me-Mo-MOFs, were prepared and applied for supercapacitor applications. The MOF materials are validated and characterized using conventional characterization procedures. The physicochemical properties of the materials were analyzed through sophisticated instrumental analysis. The surface morphological results reveal that the melamine and manganese-based MOFs (Me-Mn-MOFs) display a cubic-like structure, whereas the melamine and molybdenum-based MOFs (Me-Mo-MOFs) portray rod-like structures. The P-XRD, XPS, and BET results confirm the formation of the MOF materials from the starting materials. The electrochemical analysis reveals that the prepared materials could be a potential material for high-performance supercapacitor applications. The specific capacitances of Me-Mn-MOFs and Me-Mo-MOFs are 653.54 and 312.63 F/g. The asymmetric devices demonstrate that the power densities of Me-Mn-MOFs and Me-Mo-MOFs are 3048.7 and 2376.6 W/kg. The suggested materials could provide an original viewpoint on MOFs for use in high-performance supercapacitor applications.