Ordered nitrogen doped mesoporous carbon assembled under aqueous acidic conditions and its electrochemical capacitive properties

摘要: Abstract With urea as nitrogen source, soluble phenol–urea–formaldehyde (PUF) resin is synthesized under basic conditions, and then an N-containing mesophase obtained by co-assembly of the PUF block copolymer F127 in acidic aqueous solution. The pyrolysis resultant inert atmosphere produces a nitrogen-doped mesoporous carbon, which possesses well-defined ordered structure, large surface area (up to 537 m 2 /g), uniform pore size (∼3.6 nm) volume (∼0.49 cm 3 /g). Multi-techniques, such elemental analysis, X-ray photoelectron spectroscopy (XPS), energy dispersive (EDS) are performed characterize samples; these analytic results indicate that doped mainly exists pyridinic pyrrolic successfully homogeneously introduced into skeleton carbon. And more, content final carbon can be easily adjusted up 3.85 wt.% increasing original ratio phenol. Electrochemical measurements show presents higher specific capacitance 225 F/g) than nitrogen-free ones (169 F/g) exhibits good electrochemical stability even after 1000 cycles at current density 5.0 A/g.