Bo Qiu (仇波), Congtao Pan, Wenjing Qian, Yingjing Peng, Lihua Qiu, Feng Yan*（严锋）
J. Mater. Chem. A 2013,1, 6373-6378.
Nitrogen-doped mesoporous carbon materials are prepared via carbonization of a room temperature ionic liquid, 1-butyl-3-methylimidazolium dicyanamide (BMIMdca), using mesoporous silica template (SBA-15). The nitrogen content and nanostructure of resultant carbon materials are highly dependent on the carbonization temperature. The produced porous carbon materials were further applied as the electrode materials for supercapacitors. The porous structure and nitrogen functionalities enable the carbon materials with the specific capacitance of 210 F g-1 at a current density of 1 A g-1 in 6 M KOH aqueous solution. Furthermore, the nitrogen-doped porous carbon materials maintain a high capacitance retention capability (~95%) after 1000 cycles at a current density of 1 A g-1, indicating that this kind of nitrogen-doped carbon materials originated from the room temperature ionic liquids are promising electrode material for high-performance supercapacitors. These results may provid a facile synthesis of sulfur and nitrogen or multi-elements doped porous carbon materials originated from ionic liquids for supercapacitors. 
