High-Performing Asymmetric 2 V Supercapacitor Assembled with Leucine-Capped rGO-α-Fe2O3 as Anode and PANI Decorated mwCNT-V2O5 as Cathode

Abstract

A mammoth effort has been levied to alleviate the specific energy of supercapacitors and the asymmetric cell formation that delineates a broader potential window. The α-Fe2O3 is a potential candidate for the negative electrode in supercapacitor storage for possessing widespread operating potential, economic, higher redox activity, and eco-friendliness. The significance of the synergistic effects compared on the supercapacitive responses in accordance to the specific energy, specific capacitance, specific power, long cycle stability, and rate capability are emphasized along with the cathodic vanadium oxide PANI CNT composite. The flakes fashioned vanadium dioxide (V2O5) with the assimilation of mw-CNT and polyaniline (PANI) originate by a facile synthesis methodology to antagonize the barrier possessed by vanadium-based oxides in the advancement of supercapacitor. As a result of mw-CNT and PANI integration with V2O5, the established organic-inorganic electrode depicts a higher specific capacitance. Those iron and vanadium oxide composite delineates specific energy of ∼78.72 Wh kg−1 and ∼49.31 Wh kg−1, along with retention of the capacitance of ∼91.1% and ∼80.9% each after 10,000 cycles. These inimitable amalgam systems of the combination of inorganic-organic can accomplish the compulsion for the growth of novel functional materials for the applications of energy storage.