The Performance of Doped Mesoporous Carbon Electrodes as Electrochemical Capacitors in Optimized Alkaline Electrolyte

Electric double layer capacitors (EDLCs) have attracted widespread attention in recent years owing to their ability to supply high power in short-term pulse and long cycling durability, which make them very good energy storage devices for applications such as hybrid power sources for electrical vehicles, portable electronic devices, uninterruptible power supply (UPS), and pulse laser techniques^1-3. The electrical properties of a supercapacitor are mainly determined by the electrode material. Various materials are used in EDLCs such as carbon-based material, transition metal-oxides, and conductive polymers, in which mesoporous carbon are the most competitive electrode material for its high specific surface and low cost. In this paper, using simple template method with poly(ethyleneimine) (PEI) as sources of C, ferrous sulfate as precursor of sulfur and metal and, the nanoscale silica as sacrificial supports to create pores, N- and S- dual-doped mesoporous carbon materials are synthesized and successfully applied to EDLC with high specific capacity and cyclic stability