Hierarchical metal-organic framework derived nitrogen-doped porous carbon by controllable synthesis for high performance supercapacitors

The N-doped porous carbon (HPNCs) are prepared via facile carbonization of zeolitic imidazolate frameworks (ZIF-8) by controllable synthesis and appropriate temperature. In this work, we have discussed different preparation methods and conditions about HPNCs. The material which is carbonated at 800°C and used zinc acetate during preparation process exhibits excellent electrochemical performance with a high specific capacitance of 245Fg−1 in 6M KOH electrolyte at a current density of 1Ag−1 and low resistance. Moreover, the symmetric supercapacitor of HPNCs-C8//HPNCs-C8 exhibits a special energy density about 24.8Whkg1 at the power density of 0.79kWkg−1 in the wide voltage region of 0–1.8V. Such outstanding electrochemical behavior shows that the HPNCs-C8//HPNCs-C8 symmetric supercapacitor is a promising practical energy-storage facility. The N-doped porous carbon (HPNCs) are prepared via facile carbonization of zeolitic imidazolate frameworks (ZIF-8) by controllable synthesis and appropriate temperature which have shown outstanding electrochemical behaviors. Such outstanding electrochemical behaviors show the HPNCs-C8//HPNCs-C8 symmetric supercapacitor is a promising practical energy-storage facility. [Display omitted] •The N-doped porous carbon has metal-organic frameworks.•The N-doped porous carbon is synthesized by controllable condition and appropriate temperature.•The N-doped porous carbon shows excellent performances.