Electrochemical supercapacitors (ESCs) are energy storage devices that are in research highlights¹. A number of materials are being explored as electrode in ESC devices. Like electrode; electrolyte is an important aspect of electrochemical device that influence the performance of a supercapacitor². Aqueous electrolytes are most useful in terms of handling, stability, and abundancy³. So, in this paper we presents an electrolyte comparison study for our synthesized Tin oxide -Carbon nanofibers prepared by simple two step processes i.e. facile electrospinning and air mediated heat treatment. These materials have shown integrated morphology with highly porous structure and diameter in range 200-300 nm. These nanofibers have been electrochemically characterized using three different electrolytes i.e. H₂SO₄(acidic), Na₂SO₄ (neutral) and KOH(basic). The electrochemical performance is compared for all three electrolytes for CV, GCD and impedance. Results demonstrates that KOH based electrolyte have positive influence on supercapacitor performance. In a voltage window of 1 V, a specific capacitance of 52.47 Fg^-1 is obtained at current density of 0.5A/g for 6M KOH electrolyte.

Keywords: Nanofibers; Electrochemical energy storage; Electrolyte; Tin Oxide

Reference

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