Molybdenum sulfoselenide nanocomposite material with PANI coating for supercapacitor applications

Abstract

The global demand is necessary to fabricate and develop sophisticated nanostructured devices, which is an interesting and challenging method for generating clean and renewable energy. Transition metal dichalcogenides (TMD) exhibit high chemical stability and tunable electronic structure. Therefore, TMDs are an effective choice for electrochemical energy storage applications. In this study, we synthesized a molybdenum sulfoselenide (MoSSe)/polyaniline (PANI) composite using a two-stage preparation method. MoSSe/PANI was gradually composited on the basis of its structural and morphological characteristics. MoSSe/PANI was employed to promote electrical conductivity owing to the presence of active sites, creating a synergistic effect between the interactions in the composite material. The MoSSe/PANI composite material had a maximum specific capacitance of 340.6 Fg−1 at 1 Ag−1 current density of 1 A g-1 with an outstanding cyclic performance of 99.3 % capacitance retention after 10,000 cycles. The fabricated MoSSe/PANI//MoSSe/PANI symmetric device had a high specific capacitance of 233.3 F g-1 and a high energy/power density of 39.2 Wh kg−1 and 886.1 W kg−1, respectively. MoSSe offers a highly electrolytically available surface area for conductive PANI and provides a direct channel for electron transport in future-generation charge-storage devices.