Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (7): 1274-1280.doi: 10.3866/PKU.WHXB201405044

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Synthesis and Electrochemical Supercapacitive Properties of Nitrogen-Doped Mesoporous Carbons

XU Ling-Ling, ZHANG Xiao-Hua, CHEN Jin-Hua   

  1. State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
  • Received:2014-03-14 Revised:2014-05-04 Published:2014-06-30
  • Contact: CHEN Jin-Hua E-mail:chenjinhua@hnu.edu.cn
  • Supported by:

    The project was supported by the Hunan Provincial Natural Science Foundation, China (12JJ2010), Specialized Research Fund for the Doctoral Programof Higher Education, China (20110161110009), and Programfor Changjiang Scholars and Innovative Research Teamin University, China (PCSIRT, IRT1238).

Abstract:

Nitrogen-doped mesoporous carbons (NMCs) were synthesized by direct carbonization of zeolitic imidazolate framework-8 (ZIF-8) nanopolyhedrons. The surface morphology and structure were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and surface area and pore size analyzer. The electrochemical supercapacitive properties of the NMCs were also investigated. The results showed that the NMCs had a uniformmorphology, mesoporous nanostructure, and high surface area (2737m2·g-1). On the other hand, based on the excellent surface wettability, pseudocapacitive behavior and electrolyte accessibility resulted fromN-doping and the mesoporous structure, the NMCs exhibited excellent electrochemical supercapacitive properties: a high specific capacitance (307 F·g-1 in 1.0 mol·L-1 H2SO4 solution, at 1 A·g-1), good power characteristics, and satisfactory stability (the capacitance retained ratio was 96.9%after 5000 cycles even at a high current density of 10A·g-1).

Key words: Mesoporous carbon, Nitrogen doping, Carbonization, Capacitive property

MSC2000: 

  • O646