Fabrication and enhanced supercapacitive performance of sulfur and nitrogen co-doped porous graphene

摘要: In this paper, we present a strategy to prepare the sulfur and nitrogen co-doped porous graphene electrode, in which, three main procedures—the pore-formation natural graphite, preparation of doped graphite intercalation compounds (S-PGIC) construction sulfur/nitrogen reduced oxide (SN-PRGO) are included. The as-prepared SN-PRGO sample can behave relatively high specific surface area (SSA) simultaneously provide through-plane in-plane diffusion paths for electrolyte ions, thus exhibiting an outstanding capacitive performance. Its capacitance at scan rate 5 mV s−1 6 M KOH aqueous reach up 438 F g−1, which is, best our knowledge, among highest values so far reported heteroatoms carbon materials. Besides, also exhibits excellent cycling stability with almost 94% its initial being retained after long-term consecutive cycling. This work suggests that constructing graphene-based materials by generating pores sheets using intercalated substances layers as dopant sources be considered promising development performance electrodes supercapacitors.