Dual mesoporous carbon with high nitrogen doping level as an efficient electrode material for supercapacitors

Abstract

This paper reports a dual mesoporous carbon (NDMC) with high nitrogen doping level derived from the amino production of the sucrose synthesized under hydrothermal condition. The S BET and total pore volume of the reported materials reaches up to 1101 and 1.67 cm3 g−1, the small mesopores center at about 3.22–3.31 nm while the larger mesopores locate at 8.98–12.58 nm. The doping content of the nitrogen heteroatoms is found to be more than 11.6 at.%, and depend on the carbonization temperature. The maximum specific capacitance of the reported materials reaches up to 512 F g−1 due to the additional contribution of pseudo-capacitance induced by the nitrogen heteroatoms doping. The capacitance retention rate is found to be up to 95% after 1000 times cycles. The dual mesoporous structure, high specific area, additional pseudo-capacitance, enhanced wettability and conductivity are found to response for the superior capacitance performance of the reported materials.