| 초록 |
Electrochemical supercapacitors have been extensively investigated as energy storage devices owing to their high power density, fast charge/discharge time, and long cycle life. In this research, the self-standing and binder-free hybrid carbon nanofibers (CNFs) based on polyimide (PI), poly(vinyl pyrrolidone) (PVP), and manganese dioxide (MnO2) are prepared via electrospinning of PI and PVP blend precursors, carbonization of electrospun precursor nanofibers, and coating of MnO2 on the CNFs. Here, PVP is adopted as a pore-forming agent of the CNFs by controlling the crosslinking between PVP and PI precursor via imidization and carbonization process. The microstructures and morphological features of PI/PVP/MnO2–based hybrid CNFs are characterized by using XRD, FT-IR, Raman, SEM and TEM. The electrochemical performance of the hybrid CNFs as supercapacitor electrodes is investigated with aids of cyclic voltammetry and galvanostatic charge/discharge test. |
