Three-dimensional Graphene with MoS ₂ Nanohybrid as Potential Energy Storage/Transfer Device

Portable and matured energy storage devices are in high demand for future flexible electronics. Flowery shaped MoS₂ nanostructures with porous and flake like morphology was used to study the supercapacitive nature with specific capacitance (C _sp ) of 169.37F/g, the energy density of 28.43 Wh/Kg and power density of 10.18 W/Kg. This nanoflower like architecture was decorated on 3D-graphene on Graphite electrode to design the solid-state-supercapacitor prototype device of dimensions of 23.6 × 22.4 × 0.6 mm³ having considerable high Csp of 58.0F/g and energy density of 24.59 Wh/Kg, and power density of 8.8 W/Kg. Four fabricated supercapacitors were connected in series for real state practical demonstration using the light emitting diode that remains enlightened for 40 s by charging it only for 25 s. This study demonstrates the 3D-graphene/MoS₂ nanohybrid has a quite high overall potential window nearly about 2.7 V (-1.5 to +1.2 V) in KOH-PVA medium which can be used for the development of solid-state supercapacitors thereby completely eliminating the need for any expensive ionic liquid mediums thus building an exciting potential for high-performance energy storage/transfer devices.