Enhanced Electrochemical Behavior of PANI/Mn-BTC Nanocomposite as Electrode for Superior Supercapacitor

The development of efficient electrode materials is crucial for high-performance energy storage devices. In this study, a polyaniline/metal–organic framework (PANI/Mn-BTC) nanocomposite was synthesized and structurally characterized to confirm its successful formation. Metal–organic frameworks (MOFs) have recently emerged as promising candidates for electrode fabrication due to their well-defined crystalline structures, accessible metal sites, and high specific surface areas. Polyaniline (PANI), known for its low cost, multiple redox sites, and facile synthesis, has also attracted considerable attention for energy storage applications. The integration of these two materials in the PANI/Mn-BTC nanocomposite offers synergistic advantages that enhance electrochemical performance. Electrochemical evaluations demonstrated improved properties of the nanocomposite, indicating its potential as an effective electrode material for supercapacitors. The nanocomposite exhibited a high specific capacitance of 894 F/g at a current density of 1 A/g, along with excellent cycling stability, retaining 98% of its capacitance after 1000 charge–discharge cycles. Furthermore, electrochemical impedance spectroscopy (EIS) analysis revealed a low charge transfer resistance of the PANI/Mn-BTC electrode, which is attributed to the synergistic effects between the components and the large surface area of the nanocomposite.