Directly deposited MoS2 thin film electrodes for high performance supercapacitors

Abstract

Two dimensional (2D) layered materials have recently attracted significant research interest owing to their unique physical and chemical properties for efficient electrochemical energy storage devices. Here, we present a neoteric approach to fabricate high performance MoS₂ thin film supercapacitor electrodes by using a direct magnetron sputtering technique. The novel three-dimensional (3D) porous structure of the MoS₂ film exhibits an excellent capacitance of ∼330 F cm⁻³ along with a high volumetric power and energy density of 40–80 W cm⁻³ and 1.6–2.4 mW h cm⁻³, respectively. Moreover, the optimized MoS₂ electrode shows an outstanding cyclic stability, yielding capacitance retention over 97% after 5000 cycles of charging/discharging. The contemporary approach to MoS₂ supercapacitor electrode fabrication will enable new opportunities in flexible electronic and energy devices.