Scalable synthesis of graphitized carbon powder from Prosopis juliflora and its supercapacitve performance

Herein, we report a scalable synthesis of 3D porous graphitized carbon power (GC) using the one-step carbonizationand activation of Prosopis juliflora for symmetric supercapacitor applications. Electron-microscopy (SEM and TEM)showed the optimized GC forms a 3D-foam cluster morphology with a maximum surface area of ∼1183 mg , whichinduces rapid charge transfer reactions. The GC exhibit a prominent Raman 2D peak at ∼2670 cm . The electrochemical performance of the GC has been compared with commercially available carbon for the first-time. TheGC showed an exceptional half-cell specific capacitance of ∼415 Fg
at 1 Ag and the commercial carbon sampledelivered ∼270 Fg
at 1 Ag , which is very high compared to other reported
porous carbon materials obtained frombiomass. The GC delivered ∼50% higher power and >90% capacitance retention when compared to the commercialcarbon sample with an energy densityof ∼47 Whkg and power density of ∼49 kWkg . Thus, the GC electrodematerial is a green, sustainable, and alternative electrode for use in high energy supercapacitor
applications.