Supercapacitor Behavior of Nano-Wall Structured MoSe2 Thin Film

Addressing challenges such as rising fossil fuel costs, air pollution, and global warming requires extensive researchinto advanced energy storage systems. With rapid technological advancements, the demand for electrical energyhas significantly increased in everyday devices, including vehicles, smartphones, and household appliances.Consequently, energy harvested from renewable sources needs efficient delivery to end-users. Additionally,capturing and reusing kinetic energy from intermittent operations, such as stop-and-go movements intransportation vehicles, is crucial. While batteries have traditionally fulfilled the role of energy storage,supercapacitors provide significant advantages such as high energy density, power capability, and exceptionalcycling stability. Moreover, as the trend towards wireless devices intensifies, developing efficient, reliable energystorage solutions becomes increasingly critical. Supercapacitors are particularly promising in meeting the risingdemands of next-generation energy storage systems. This study looks into making supercapacitor electrodematerials using molybdenum diselenide (MoSe2), which is part of a group of materials known as two-dimensionaltransition metal dichalcogenides (2D TMDC). MoSe2 demonstrates attractive properties for electrochemical,photocatalytic, and optoelectronic applications. Its layered structure, combined with the advantageous size andelectrical conductivity of selenium (Se) atoms, positions MoSe₂ as a highly suitable material for electrochemicalenergy storage applications. The primary aim was to enhance ion storage capacity by increasing electrode surfacearea. Nano-wall structured MoSe2 thin films were synthesized at 300 oC via magnetron sputtering, employingdifferent growth durations. The MoSe2 films were examined for their structure, shape, and electrical properties tosee how well they work as supercapacitor electrodes. The study determined that nano-wall structures formed at anoptimal growth duration significantly improved capacitance and electrochemical performance by expanding theelectrode's active surface area.