Fabrication of 1.8 V hybrid supercapacitor based on molybdenum disulfide-Zinc oxide nanocomposite electrode alongside polyvinyl alcohol (PVA) gel electrolyte

Two dimensional materials with excellent physicochemical and quantum chemical properties have been widely investigated for the development of high energy density hybrid supercapacitors. Herein, we synthesized the two-dimensional molybdenum disulfide − zinc oxide nanocomposites (MoS 2 –ZnO NC) by modest hydrothermal approach followed by ultrasonication process. Brunauer-Emmett-Teller (BET) analysis reveals that the as-synthesized MoS 2 –ZnO NC provides high surface area of 87.2 m 2 g −1 and the pore diameter of 2.75 nm. MoS 2 –ZnO NC electrode delivers the high specific capacity of 426.6 C g −1 at a sweep rate of 10 mV s −1. The solid-state hybrid supercapacitor device has been fabricated based on MoS 2 -ZnO cathode and activated carbon (AC) using polyvinyl alcohol–potassium hydroxide (PVA-KOH) gel polymer as solid-state electrolytic medium, delivering an outstanding energy density of 56.7 Wh kg −1 and high-power density of 14450 W kg −1.