Johnsirani et al. reported the sustainable, and cost-effective synthesis of boron-doped activated biomass-derived carbon from the stems of Prosopis juliflora, activated using KOH, and annealed at 800 ˚C for 1 h in Ar atmosphere (PJC) . In addition, the PJC was doped with boron using boric acid to obtain boron doped PJC (B/PJC). As calculated from the BET analysis, the SBET of PJC, and B/PJC were 353.32, and 315.56 m 2 g -1 , respectively, which indicated that the loading of boron in the carbon lattice had led to the decrement in the SBET due to the fact that B might encapsulated in the porous structure. The XPS analysis of B/JPC showed the presence of O, and B heteroatoms with 13.23, and 3.21 at%, respectively. The supercapacitive performances were studied in a three-electrode system using 1 M H2SO4 electrolyte, and the specific capacitances of PJC, and B/PJC were estimated as 145.1, and 307.14 F g -1 at 0. examined by a three-electrode system using 6 M KOH electrolyte. MHPC-3 electrode displayed a superior supercapacitance upto 170 F g -1 at 0.5 A g -1 in KOH electrolyte, and had a capacitance retention of ~ 94.8%, and a stable coulombic efficiency above 99.99 % over 14000 cycles at 3 Ag -1 . In addition, symmetric supercapacitor was fabricated using MHPC-3 electrode, which displayed the specific capacitance of 41 F g -1 at 0.2 A g -1 . The corresponding energy density, and power density were 8.2 W h Kg -1 and 118.5 W Kg -1 . The N, O, and P heteroatoms has significantly enhanced the charge balance via improving surface wettability, and active sites towards the enhanced capacitance property by introducing pseudocapacitance in addition to EDLC. The electrochemical supercapacitive performance of heteroatom doped porous carbon from the various reports is mentioned in Table . The supercapacitive performances of the fabricated electrode were investigated in a threeelectrode system. The galvanostatic discharge studies of PEDOT/g-C3N4 electrodes showed the maximum specific capacitance of 137 F g -1 in 1 M H2SO4, and 200 F g -1 in 1 M Na2SO4 at 2 A g -1 , respectively. For the electrochemical analysis performed in 1 M H2SO4, the average energy density, and average power density was reported as 9.65 W h Kg -1 , and 4001.86 W Kg - 1 with the cycling stability showing 89% of retention capacitance after 1000 cycles. In 1 M Na2SO4, the average energy density, and average power density were obtained as 17.5 W h Kg - 1 , and 5000 W Kg -1 with 96.5% capacitance retention after 1000 cycles.