Mixed biomass-derived multi-heteroatom doped carbon-decorated Mn3O4 for a high-performance asymmetric all solid-state supercapacitor

Abstract

Recently, the development of non-conventional electrochemical energy storage technologies has attracted great attention. Herein, in accordance with green strategies for the producing renewable energy storage systems, eco-friendly electrode was successfully produced from mixed biomass precursors through carbonization and activation processes. Obtained electrode (MB-AC) as a negative and its composite (Mn3O4@MB-AC) as positive electrodes were exhibited excellent electrochemical performance with high specific capacitance of 716.49 Fg−1 at 0.75 Ag−1 and 848.21 Fg−1 at 1.0 Ag−1 respectively, in 3 M KOH electrolyte. Further, for the practical application, flexible asymmetric all-solid-state supercapacitor was made. Which offer high specific capacitance of 266.46 Fg−1 at 2 Ag−1, high energy density of 119.91 Wh kg−1 at a high-power density of 1800.08 W kg−1 within a voltage window of 1.8 V. These prominent electrochemical performances suggest that selected waste biomass materials derived carbon have considerable applications in the field of energy storage technologies.