Interconnected micro-mesoporous carbon nanofiber derived from lemongrass for high symmetric supercapacitor performance

The hierarchical porous activated carbon nanofiber has been prepared and characterized from the biomass based of lemongrass leave waste (LG). preparation process used a simple technique through impregnation ZnCl2 with low concentrations (0.5, 0.7 0.9) mol/L. These three were chosen to maximize potential LG produce nanoporous structures high surface area. is performed by one-step technique, including carbonization physical activation at temperature 800 °C in N2/CO2 atmosphere. sample variations resulted very good amorphous structure according XRD pattern. LG-0.7 known have best electrochemical properties an SSA reaching 1694 m2 g−1 content 90.38%. Uniquely, combined morphological appearance pores such as sponges pores. This pore strongly supports electrode 256 F g−1, specific energy 35.6 Wh kg−1 power density 128.3 W obtained using GCD method. Electrochemical testing was carried out 0–1 V scan rate 1 mV s−1 under influence aqueous electrolyte M H2SO4. results demonstrate tremendous leaf raw material for electrodes high-performance supercapacitors.