Finding supercapacitive materials with high energy and power densities has attracted signi cant interest in recent years. Herein, we are reporting layered MnWO 4 nanostructure for supercapacitor applications. MnWO 4 //AC asymmetric cell was fabricated by using hydrothermally synthesized MnWO 4 nanostructure as a cathode and activated carbon as an anode. Prior to device fabrication, the structural and electrochemical properties of MnWO 4 were thoroughly studied. MnWO 4 //AC asymmetric cell with KOH electrolyte showed speci c capacitance and energy density of 90 F/g (at 1 mA/cm 2) and 51 Wh/kg, respectively. Upon addition of redox-active KI into KOH, both the speci c capacitance and energy density were signi cantly enhanced (144 F/g and 90 Wh/Kg, respectively). The enhanced electrochemical properties of MnWO 4 //AC asymmetric cell can be attributed to the high-speed solution-phase Faradic reactions contributed by KI redox species in the KOH electrolyte.
Finding supercapacitive materials with high energy and power densities has attracted significant interest in recent years. Herein, we are reporting layered MnWO4 nanostructure for supercapacitor applications. MnWO4//AC asymmetric cell was fabricated by using hydrothermally synthesized MnWO4 nanostructure as a cathode and activated carbon as an anode. Prior to device fabrication, the structural and electrochemical properties of MnWO4 were thoroughly studied. MnWO4//AC asymmetric cell with KOH electrolyte showed specific capacitance and energy density of 90 F/g (at 1 mA/cm2) and 51 Wh/kg, respectively. Upon addition of redox-active KI into KOH, both the specific capacitance and energy density were significantly enhanced (144 F/g and 90 Wh/Kg, respectively). The enhanced electrochemical properties of MnWO4//AC asymmetric cell can be attributed to the high-speed solution-phase Faradic reactions contributed by KI redox species in the KOH electrolyte.
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