Murovhi, PhathutshedzoTarimo, Delvina JaphetOyedotun, Kabir OyeniranManyala, Ncholu I.2021-01-072020-12Murovhi, P., Tarimo, D.J., Oyedotun, K.O. et al. 2020, 'High specific energy asymmetric supercapacitor based on alpha-manganese dioxide/activated expanded graphite composite and activated carbon-polyvinyl alcohol', Journal of Energy Storage, vol. 32, art. 101797, pp. 1-11.2352-152X (online)10.1016/j.est.2020.101797http://hdl.handle.net/2263/77961Please read abstract in the article.en© 2020 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Journal of Energy Storage. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Journal of Energy Storage, vol. 32, art. 101797, pp. 1-11, 2020, doi : 10.1016/j.est.2020.101797.SupercapacitorHybridAlpha-manganese dioxideActivated expanded graphite (AEG)Activated carbon-polyvinyl alcohol (AC-PVA)Scanning electron microscope (SEM)High resolution transmission electron microscope (HRTEM)Energy-dispersive spectroscopy (EDS)X-ray diffraction (XRD)Raman spectroscopyFourier transform spectroscopy (FTIR)Brunauer-Emmett-Teller (BET)Postprint Article