Synthesis of B C N nanotubes by CVD method and their electrochemical performance towards supercapacitors

Energy transition to renewables necessitate efficient energy storage systems such as super capacitors. Hence Boron carbon nitride (BCN) nanotubes were synthesized using CVD technique at 800, 900 and 1000 °C, using N-Dimethyl formamide and trimethyl borate as precursors and ferrocene as the catalyst. Increase in CVD temperature from 800 to 1000 °C increased the conductance and specific capacitance. Supercapacitor device fabricated with BCN synthesized at 1000 °C showed specific capacitance of 68.125F/g, energy density of 1.51 Wh/Kg, energy efficiency of 53.17 % and power density of 100 W/Kg. It retained 73.6 % of initial capacitance for 1000 charge/discharge cycles.