Abstract

R. Suresh¹, K. Tamilarasan² and D. Senthil Vadivu³

DOI : http://dx.doi.org/10.13005/ojc/340648

Progress in material science has unearthed a number of options that offer great advantages for nanostructured electrode materials which enable supercapacitors to operate efficiently. Present work involves fabrication of symmetric and asymmetric type supercapacitor devices utilizing Mn-CuO nanostructures and activated carbon (AC) as electrode materials and subsequent investigation on their supercapacitive performance in 2M KOH aqueous electrolyte. The asymmetric supercapacitor device (Mn-CuO // 2M KOH// AC) demonstrate a specific capacitance of 72 Fg^-1 at a current density of 0.5 Ag^-1. The cyclic stability test of this device performed at a current density of 10 Ag^-1 reveals a capacitance retention of 71% of its initial value over 300 charge-discharge cycles. In addition, this device exhibits an energy density of 7.4 Whkg^-1 and a power density of 127 Wkg^-1.

Aqueous Electrolyte; Cyclic Stability; Energy Density; Nanostructured Electrodes; Specific Capacitance; Supercapacitors

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