Ndiaye, Ndeye MatyMadito, M.J. (Moshawe)Ngom, B.D.Masikhwa, T.M. (Tshifhiwa)Mirghni, Abdulmajid AbdallahManyala, Ncholu I.2019-11-182019-11-182019-05-10Ndiaye N.M., Madito M.J., Ngom B.D. et al. High-performance asymmetric supercapacitor based on vanadium dioxide and carbonized iron-polyaniline electrodes. AIP Advances 9(5), 055309 (2019); DOI: 10.1063/1.5091799.2158-322610.1063/1.5091799http://hdl.handle.net/2263/72338Vanadium dioxide (VO2) monoclinic nanosheets were synthesized by a solvothermal method and carbonized iron-polyaniline (C-FP) nanograins were prepared by pyrolysis of iron-polyaniline (PANI) mixture under nitrogen ambient. An asymmetric device (VO2//C-FP) was evaluated with VO2 and C-FP as positive and negative material electrodes in aqueous 6 M KOH electrolyte respectively. The asymmetric supercapacitor (VO2//C-FP) exhibited a 47 mA h g-1 specific capacity and a specific energy of 30Wh kg−1 with an associated specific power of 713 W kg−1 at a gravimetric current of 1 A g−1 in a potential window of 1.6 V. It also displayed an 89% energy efficiency after 10000 galvanostatic charge-discharge cycles with a large improvement after ageing test at a gravimetric current of 10 A g-1.en© 2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) licenseVanadium dioxide (VO2)Ageing testElectric dischargesSpecific capacitiesSolvothermal methodPotential windowsPolyanilines (PAni)Polyaniline electrodesNegative materialsGalvanostatic charge dischargesAsymmetric supercapacitorTestingSupercapacitorPotassium hydroxideIronEnergy efficiencyElectrolytesElectrodesCarbonized iron-polyaniline (C-FP)Article