Abstract
Carbonaceous materials containing nitrogen (C/N materials) were prepared by pyrolysis of diaminomaleonitrile (AMN). A C/N material prepared by the pyrolysis of AMN at 1020 K (AMN1020K) had a C/N atomic ratio of 2.0 and a noncrystalline carbonaceous structure with a Brunauer, Emmett, and Teller (BET) surface area of . A possible formation mechanism of a C/N material has been proposed on the basis of the products, X-ray diffraction, and electron spectroscopy for chemical analysis (ESCA). The material AMN1020K showed large capacitances of and when a current density of is applied in a three-electrode cell in 1 M aqueous solution, in comparison to those of activated carbon ( and ) having a BET surface area of . The ESCA study indicated that pyridinic and quarternary nitrogen atoms existed in the C/N materials, which results in producing a pseudocapacitance in addition to the electric double-layer capacitance. The introduction of nitrogen into the carbonaceous material improves the wettability of the material, which should also improve the capacitance.
Published Version
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