Nitrogen and sulfur co-doped ordered mesoporous carbon with enhanced electrochemical capacitance performance

Abstract

Doping ordered mesoporous carbon with electron-donating nitrogen and sulfur heteroatoms is a promising strategy to enhance its electrochemical performance. Here we demonstrate the successful fabrication of nitrogen and sulfur co-doped ordered mesoporous carbon (NSOMC) materials with high specific surface areas (978–1021 m2 g−1), large pore volumes (1.10–1.20 cm3 g−1), highly-ordered pore structures and controlled dopant contents (10.0–4.8 at.% for nitrogen and 1.7–2.6 at.% for sulfur) using the oligomer of pyrrole as the precursor and sulphuric acid as the catalyst and sulfur source. NSOMC materials exhibit enhanced electrochemical double-layer capacitance (EDLC) performances due to their improved surface activity and conductivity compared with pure carbon CMK-3. The fabrication of nitrogen and sulfur co-doped ordered mesoporous carbon with enhanced electrochemical capacitance performance provides a viable route to promote its applications in electronic devices.