Hybrid materials of vanadium nitride and porous carbon nanoparticles(VN/PCNPs) were fabricated by a facile pyrolysis process of vanadium pentoxide(V_2O_5) xerogel and melamine at relatively low temperature of 800 °C for supercapacitor application. The effects of the feed ratio of V_2O_5 to melamine(r), and nitrogen flow rate on the microstructure and electrochemical performance were also investigated. It was found that the size of the as-synthesized nanoparticles is about 20 nm. Both r value and N_2 flow rate have enormous impacts on morphology and microstructure of the nanoparticle, which correspondingly determined the electrochemical performance of the material. The VN/C hybrid nanoparticles exhibited high capacitive properties, and a maximum specific capacitance of 255.0 Fg~(-1) was achieved at a current density of 1.0 Ag~(-1) in 2 M KOH aqueous electrolyte and the potential range from 0 to -1.15 V. In addition,symmetrical supercapacitor fabricated with the as-synthesized VN/PCNPs presents a high specific capacitance of 43.5 F g~(-1) at 0.5 A g~(-1) based on the entire cell, and an energy density of 8.0 Wh kg~(-1) when the power density was 575 W kg~(-1). Even when the power density increased to 2831.5 W kg~(-1), the energy density still remained 6.1 Wh kg~(-1). Hybrid materials of vanadium nitride and porous carbon nanoparticles (VN / PCNPs) were fabricated by a facile pyrolysis process of vanadium pentoxide (V 2 O 5) xerogel and melamine at relatively low temperature of 800 ° C for supercapacitor application. The effects of the feed ratio of V 2 O 5 to melamine (r), and nitrogen flow rate on the microstructure and electrochemical performance were also investigated. It was found that the size of the as-synthesized nanoparticles is about 20 nm. Both r value and N_2 flow rate have enormous impacts on morphology and microstructure of the nanoparticle, which correspondingly determined the electrochemical performance of the material. The VN / C hybrid nanoparticles exhibited high capacitive properties, and a maximum specific capacitance of 255.0 Fg -1 was achieved at a current density of 1.0 Ag ~ ( -1) in 2 M KOH aqueous electrolyte and the potential range from 0 to -1.15 V. In addition, symmetrical supercapacitor fabricated with the as-synthesized VN / PCNPs presents a high specific capacitance of 43.5 F g -1 at 0.5 A g -1 based on the entire cell, and an energy density of 8.0 Wh kg -1 when the power density was 575 W kg ~ (-1). Even when the power density increased to 2831.5 W kg -1, the energy density still remained 6.1 Wh kg -1.