at 800 °C has got the highest specific capacitance of 475 F g -1 at 1 A g -1 in 6 M KOH solution and revealed the good electrochemical stability with 97% retention in capacitance form initial value over 3000 cycles. This might be attributed to the fact that as the temperature rises, the contact between the electrode and electrolyte increases which leading to the increase in the active sites and also the SBET of the BCN obtained at 800 °C has got the maximum value of 506.9 m 2 g -1 which is comparably higher than the other two samples. The atomic percentage of boron, carbon and nitrogen in the BCN synthesized at 800 °C estimated from XPS analysis found to be 10.34, 61.31 and 17.53%, respectively.