In order to illustrate the potential of BS-1000 as a promising supercapacitor electrode, their electrochemical performance was compared to that of black pearls 2000 in a three-electrode system using 2 M H2SO4. When the current density was increased from 0.25 to 20 A g -1 , the specific capacitance of BS-1000 was gradually decreased from 328.3 F g -1 to 194.5 F g -1 with only 49% decay, whereas BP-2000 lost 71% of its capacitance under the same conditions. BS-1000 displayed the high-power density of 1500 W Kg -1 , and the energy density was 4.5 Wh Kg -1 , which is attributed to the presence of large amounts of sp 2 carbon, and high SBET of BS-1000 (1003.7 m 2 g -1 ), a closer value to that of commercial 3 m 2 g -1 ) with more sp 3 carbon in the carbon backbone. The supercapacitive performance of BS-1000-coin cell was analysed in 6 M KOH (alkaline medium), which presented the capacitance of 247 F g -1 at a current density of 1 A g -1 . The study revealed that, oxygen atoms tend to be oxidized to induce pseudocapacitance behaviour under acidic condition, and in contrast a very week pseudocapacitance behaviour is observed due to the existence of less H + , under alkaline conditions. PCN1-3-0, PCN1-3-0.5, PCN1-3-1, and PCN1-3-2, according to the mass ratios of precarbonized pine nut shells, KOH, and melamine, respectively. The XPS analysis showed the presence of pyridinic nitrogen (N-6), pyrrolic nitrogen (N-5), graphitic nitrogen (N-Q), and pyridinic nitrogen oxide (N-X), among which N-6, and N-5 represented the dominated presence of about 70 at%. The PCN1-3-0.5, PCN1-3-1, and PCN1-3-2 showed the SBET of 2093, 1847, and 1167 m 2 g - 1 , respectively. The supercapacitive capability of PCNs were measured in an aqueous electrolyte of 6 M KOH using three-electrode configuration, through which it was observed that the area of PCN1-3-1 was larger than that of others, and there by suggested that the highest specific capacitance has been delivered by PCN1-3-1. In two-electrode system with 6 M KOH aqueous electrolyte, the PCN1-3-1 delivered the highest specific capacitance of 324 F g -1 , while the value of PCN1-3-0, PCN1-3-0.5, and PCN1-3-2 were 169, 207, and 264, respectively at 0.05 A g -1 . The EIS analysis of PCN1-3-1 showed the smallest semicircle with Rs value of 0.64 Ω in a high-frequency region, which further referred to a low internal resistance and prominent conductivity. PCN1-3-1 retained 94.6% capacitance at a current density of 2 A g -1 after 10,000 charge-discharging cycles. In addition, the performance of PCN1-3-1 was further evaluated in an aqueous electrolyte of 1 M Na2SO4, and delivered the specific capacitance of 110 F g -1 at 1