| 초록 |
Electrochemical supercapacitors have received great interest as a promising energy storage device, due to their high power density, fast charge/discharge time, and long cyclability. To attain high performance supercapacitor electrodes, we fabricated hybrid carbon nanofibers from polyimide and MnO2 precursors via co-electrospinning, calcination and carbonization process, and investigated their microstructures and electrochemical properties. For the purpose, poly(amic acid) (PAA) as the polyimide precursor was synthesized from 3,3-dihydroxybenzidine and pyromellitic dianhydride. Manganese acetate/poly(vinyl pyrrolidone) (PVP) solution was prepared for the precursor of MnO2 nanofiber. Each PAA and manganese acetate/PVP solution was electrospun simultaneously into nanofibers, which were then calcinated and carbonized to obtain final hybrid carbon nanofibers. The electrochemical performance of the hybrid carbon nanofibers was investigated by considering microstructural features. |
