NOHPC-1:10 exhibited the maximum SBET of 1899 m 2 g -1 , with a pore volume of 1.16 cm 3 g - 1 , and mesopore ratio of 70%. XPS analysis showed the presence of nitrogen, and oxygen heteroatoms in all the samples, and relative nitrogen content was varied from 1.61 to 5.30 wt%, and the oxygen content was in the range from 10.84 to 23.20 wt%. NOHPC-1:10 exhibited moderate oxygen content of 14.12 wt%, and highest nitrogen content of 5.30 wt% representing the constructive chemical composition suitable for high-performance supercapacitors. In threeelectrode system with 6 M KOH electrolyte, NOHPC-1:10 exhibited the maximum specific capacitance of 276 F g -1 at 0.2 A g -1 , along with a retention of 90.9% rate capability at 10 A g - 1 . In 1 M Na2SO4, the symmetric supercapacitor based on NOHPC-1:10 in a potential window of 0-1.6 V, and delivered the energy density of 13.9 W h Kg -1 at a power density of 120 W Kg - 1 , and a cycling stability with 95% capacitance retention after 10000 cycles was achieved. The Coulombic efficiency of the symmetric supercapacitor could retain 100% of its initial value after 10,000 cycles, indicating the good long-term reversibility. Further, floating test west carried by subjecting the symmetric cell to float at 1.6 V at 0.2 A g -1 , which showed that the capacitance decay at 100 h of holding time was ~4%, and rapidly decreased afterwards, and resulted in the total capacitance loss over 200 h was ~30%. For comparative studies, NOHPC-1:10 symmetric supercapacitor performance was further investigated in 6 M KOH, and obtained the maximum specific capacitance of 179 F g -1 at 0.2 A g -1 , which is slightly higher than that of 1 M Na2SO4 (157 F g -1 at 0.2 A g -1 ). However, the corresponding energy density was 6.1 W h Kg -1 at 89 W Kg -1 , which is much higher than that of 1 M Na2SO4 due to its low atmosphere. In particular, CS3 sample was selected to undergo pyrolysis at two more different temperatures (600, and 700 ˚C), and denoted as CSx-Ty (y = 600, 700, 800 ˚C). The SBET, and pore volume increased with increasing pyrolysis temperature from CS3-T600 (~ 775 m 2 g -1 ; ~ 0.48 cm 3 g -1 ) to CS3-T800 (~ 2812 m 2 g -1 ; ~ 2.29 cm 3 g -1 ). The at% of heteroatoms were decreased with increasing temperature, and CS3-T600 displayed higher doping of N, S, and O at%, and reached upto 5.86, 1.08, and 11.81 %, respectively, which could be attributed to the facile nature of heteroatoms functional groups in carbon frameworks to be attacked by NaOH at higher pyrolysis temperature. The electrochemical properties were tested using 6 M KOH aqueous electrolyte in a three-electrode system. CS3-T800 delivered the maximum specific capacitance of ~ 308 F g -1 at 1 A g -1 , relative to CS1-T800 (~ 135 F g -1 ), CS2-Y800 (~ 200 F g -1 ), CS3-T700 (~ 254 F g -1 ), CS3-T600 (~ 161 F g -1 ). Further, CS3-T800 exhibited the rate capability about 65.3% capacitance retention, and retained a high retention of ~ 94% after 5,000 cycles at 20 A g -1 . In two-electrode system, a specific capacitance of CS3-T800 was determined to be ~ 302 F g -1 at 1 A g -1 , and the specific capacitance was maintained about 95% of its initial capacity after 5000 charge/discharge cycles at 20 A g -1 as evident from The materials were further carbonized at different temperatures (600, 700, 800 ˚C), and different weight ratios between carbonaceous samples, and KOH (1:0, 1:1, 1:2, and 1:3), and named as 700-0, 700-1, 700-2, 700-3, 600-3, 800-3, respectively. The SBET of 700-1, 700-2, 700-3, 600-3, and 800-3 samples were evaluated as 1327, 1666, 2609, 1252, and 2262 m 2 g -1 , respectively. 700-3 sample exhibited the maximum SBET of 2609 m 2 g -1 , pore volume of 1.53 cm 3 g -1 , and composed with mesopores of pore size 2-3 nm. The decreased SBET for 800-3 sample is due to the degradation of the carbon skeleton at high temperature. The XPS investigation on of 700-3 porous carbon materials showed the presence of oxygen, and nitrogen heteroatom contents with 5.01 at%, and 1.75 at%, respectively. The electrochemical performances were measured in 6 M KOH electrolyte using three-electrode system, and 700-3 electrode showed the maximum capacitance of 405 F g -1 at 0.5 A g -1 , and the cyclic stability In this study, pyrolysis, and activation of a carbon precursor (novolac beads) was achieved in one-single step with ammonia at different temperatures , and reported to be a facile method to combine the pyrolysis, activation of the material, and introduction of N heteroatoms, without using nitrogen-precursor, or subsequent follow-up treatment. The resultant samples were labelled as N-NC-750, N-NC-850, N-NC-950, and for comparative studies on sample was prepared without the addition of ammonia (NC-950). The N-NC-950 sample exhibited the highest SBET of 2358 m 2 g -1 , total pore volume of 1.32 cm 3 g -1 , and the average pore size of 1.43 nm versus N-NC-750 (865 m 2 g -1 ), N-NC-850 (1159 m 2 g -1 ), and NC-950 (616 m 2 g -1 ). The N heteroatoms was determined from the XPS analysis, and their content was decreased with increasing temperature due to the desorption of nitrogen groups at high temperatures. The N-NC-750 sample showed the highest nitrogen content of 5.1 ± 1.3 at%, and the N-NC-950 showed the lowest nitrogen content of 3.8 ±1.6 at.%. The supercapacitive performances of N-NC materials were analysed in an aqueous electrolyte (1 M NaCl), an organic electrolyte (1 M tetraethylammonium tetrafluoroborate in acetonitrile, TEA-BF4 in ACN), and an ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate, EMIM-BF4). With a symmetrical full-cell set-up using 1 M TEA-BF4 in ACN as electrolyte, the N-NC-950 electrode displayed the maximum specific capacitance of 105 F g -1 at 0.05 A g -1 , which was much higher than that of non-activated NC-950 (1 F g -1 at 0.05 A g -1 ). The electrochemical performance of N-NC-950 electrode was further tested in an aqueous electrolyte (1 M NaCl), and in a neat ionic liquid (EMIM-BF4). In 1 M NaCl electrolyte, the specific capacitance of 134 F g -1 was observed at the beginning, which was increased to 173 F g -1 after the voltage floating experiment at 1.2 V, due to the improved wetting. In EMIMBF4, the N-NC-950 electrode delivered the specific capacitance of 136 F g -1 , and stability of 95% after a voltage floating at 3.2 V for 100 h. The ionic liquid, and organic electrolyte demonstrated the specific energy values of 50 W h Kg -1 , and 22 W h Kg -1 , respectively. The supercapacitive performances of the nitrogen-containing carbon beads were reported to be mainly influenced by the pore size distribution and the functional groups of the material. stands for molar ratio of 1/1, 4/1, 6/1, and 8/1 of ZIF-8/CNC). For comparison purposes, pure ZIF-8, and the commercially available microcrystalline cellulose and activated carbon were employed to replace CNC, and were denoted as N-C, AC-1, and AC-2, respectively. The SBET of HPNC950 was estimated as 1131 m 2 g -1 , which is much higher than the control samples N-C (223 m 2 g -1 ), AC-1 (673 m 2 g -1 ), and AC-2 (733 m 2 g -1 ). The atomic ratio of nitrogen/carbon in HPNC950 was around 0.062