Microporous N- and O-Codoped Carbon Materials Derived from Benzoxazine for Supercapacitor Application

Heteroatom-doped porous carbon materials are highly desired for supercapacitors. Herein, we report the preparation of such material from polybenzoxazine (PBZ), a kind phenolic resin. Four different N- and O-codoped microporous were obtained by changing carbonization temperature (600, 700, 800, 900 °C). Their structures characterized scanning electron microscopy (SEM), nitrogen isothermal absorption desorption, X-ray diffraction (XRD), Raman spectroscopy, elemental analysis photoelectron spectroscopy (XPS), their electrochemical performances evaluated cyclovoltammetry (CV) galvanostatic charge–discharge (GCD) test in three-electrode system. It was found that (C-700) prepared at 700 °C possesses largest specific surface area (SSA), total pore volume average size among family, thus displays highest capacitance with value 205 F g−1 current density 0.25 A good cycling stability. The work demonstrates high performance can be derived benzoxazine polymers promising supercapacitor application.