Raj et al. reported the S-doped activated mesoporous carbon derived from the Borassus flabellifer flower (palm male flower) as a suitable candidate for supercapacitor applications . The palm male flower was activated using different concentrations of KOH (20 wt%, and 30 wt%), and thiourea was used as the sulfur precursor. The activated carbon was prepared at three different carbonization temperatures (400, 500, and 600 ˚C) enriched with sulfur-doped carbon, and were labelled as PM1, PM2, and PM3 (using 20wt% KOH), and PM4, PM5, and PM6 (using 30 wt% KOH), respectively. The BET studies of KOH activated S-doped activated carbon exhibited mesoporous structure, and the SBET were progressed from to 474.99 m 2 g -1 (30 wt% KOH), and the pore volume increases from 0.06226 (20 wt%) to 0.2511 cm 3 g -1 (30 wt%). The BET analysis clarified that, the higher activation temperature 600 ˚C, and the 30% of KOH activator has strongly influenced the SBET, and the development of pore structure. The XPS studies showed the presence of highest content of O, and S with 11.66, and 3.86 at% in PM6 sample and the lowest content of S with 4.07 at% was observed in PM1 sample. The electrochemical performances S-doped activated carbon derived from palm male flower was validated in a three-electrode system in 1 M H2SO4 aqueous electrolyte, and the maximum specific capacitance of 275 F g -1 at 1 A g -1 of current density was observed for PM6 electrode. Further, a symmetrical supercapacitor cell was fabricated using PM6 electrode, which delivered the specific capacitance of 137.7 F g -1 at 1 A g -1 . The SSC delivered the energy density of 9.345 W h Kg -1 and power density of 687 W Kg -1 , and the cycling stability of 95.4% after 3000 cycles. The enhanced electrochemical performance of the study is attributed to the highest content of sulfur and mesopores in the activated carbon matrix.