Improved electrochemical performance of mesoporous carbon via N/S doping

Modifying mesoporous carbon using a single additive in the form of thiourea, as a source of sulfur and nitrogen, is a flexible strategy for improving electrochemical activity. In this study, sulfur and nitrogen were successfully introduced into a mesoporous carbon framework through a simple self-assembly process induced by solvent volatilization. The prepared nitrogen/sulfur co-doped mesoporous carbon (N/S-MC) material had a high specific surface area (406.64 m 2 ·g −1 ) and heteroatom content (8.75 at.% nitrogen and 0.34 at.% sulfur). As a potential supercapacitor electrode material, it possessed a high specific capacitance of 230 F·g −1 , which was measured using a three-electrode system at a current density of 0.5 A·g −1 . The electrochemical double-layer capacitor (EDLC) performance of N/S-MC was significantly enhanced compared to that of pure mesoporous carbon due to increased reactivity and improved electrical properties. Consequently, N/S-MC is more suitable for electronic power applications.