Aravinda, L.S.Udaya, Bhat, K.Bhat, B.R.2020-03-312020-03-312013ECS Solid State Letters, 2013, Vol.2, 11, pp.M61-M63https://idr.nitk.ac.in/handle/123456789/12581A simple room temperature method was used to synthesize Porous ?-MnO2 nano whiskers bunch. The porous ?-MnO2 /Activated carbon (AC) composites were prepared by very simple mechanical mixing method with varying amount of MnO2. A symmetric supercapacitor stack was fabricated using the prepared composite electrode material. The composite with 30% MnO2 exhibit a maximum specific capacitance of 107 Fg-1 at 1 mAcm-2 in non-aqueous electrolyte. The corresponding energy density was found to be 8.35 Whkg-1. The electrode also exhibits excellent cyclic stability. 2013 The Electrochemical Society.Article