O-N-S Self-Doped Porous Fusiform Carbon Particles Derived from Hair for High Performance Supercapacitors

Abstract

Recently developed heteroatom-self-doped porous carbons electrode materials have been revealed to possess advanced electrochemical performances for supercapacitors. Herein, a facile one-step strategy is reported to prepare O-N-S self-doped porous fusiform carbon particles (FCPs) via carbonizing macroscopic-scale hair at an appropriate temperature. The as-prepared FCPs presents fusiform shape with a mean width of about 350 nm and a mean length of about 600 nm. Meanwhile, the as-obtained product possesses a typical hierarchical porous structure with O-N-S self-doped and a high specific surface area of 278 m2 g-1. The hierarchical porous structure with heteroatom self-doped can effectively accelerates ion diffusion/transport whilst the large specific surface area provides more electroactive sites, resulting in the FCPs achieve a high specific capacitance of 250 F g-1 at 1 A g-1 in 1 M KOH electrolyte. Moreover, the FCPs and reduced graphene oxide (RGO) are respectively acts as negative/positive electrode to assemble symmetrical supercapacitors. Finally, a high energy density of 14 Wh kg-1 at a power density of 533 W kg-1 in a cyclic reversibly voltage of 0-1.5 V is realized by the as-builted FCPs //RGO supercapacitors, and connecting the two supercapacitors in series can power 38 LEDs.

Keywords: Hair, O-N-S self-doped, fusiform, porous carbon, supercapacitors.