Abstract
In this study, amorphous zinc oxide incorporated with sulfur-doped carbon composite nanofiber ([email protected]) was obtained through a facile electrospinning technique and calcination. The [email protected] composite was characterized in detail in order to understand the structural features of the electrodes and applied for supercapacitors. As a self-supporting electrode, it achieved a high capacitance of 209 F/g at 1 A/g and sustained 158 F/g at 10 A/g. Also, an asymmetric supercapacitor (ASC) assembled by [email protected] as the positive and carbon nanofiber as the negative electrode (−CNF//[email protected]+) achieved a specific energy of 11.2 Wh/kg at a specific power of 900 W/kg in 0–1.8 V. The excellent electrochemical performance can be ascribed to the enhanced surface area, increased micropore volume, and heteroatom content. This study can provide a feasible way for the development of other carbon composite electrodes with remarkable performance.
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