Abstract
Polyaspartic acid-based nitrogen-doped porous carbon (N-PC) has been prepared by one-step activation and carbonization of polyaspartic acid at 800[Formula: see text]C in N2 atmosphere. The morphologies and structures of products are characterized by X-ray diffraction, element analysis, scanning electron microscopy and N2 adsorption–desorption. The characterizations show that the morphologies and structures of the N-PC deeply depend on the additive amount of activating agent. The as-prepared activated carbon possesses irregular surface morphology with high surface area in the range of 1600–1800[Formula: see text]m2 g[Formula: see text]. Furthermore, the activated carbon possesses proper amount of micropore and mesopore structures. As an electrode material for supercapacitors, the specific capacitance of N-PC is as high as 265[Formula: see text]F g[Formula: see text] at a current density of 0.5[Formula: see text]A g[Formula: see text], and it also exhibits good cyclability (retains about 93% initial capacitance after 5000 cycles).
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