| 초록 |
In this study, we fabricated 1D hollowed carbon nanofiber (CNF) fully decorated with spinel NiCo2O4 nanocomposite and used as an effective electrode towards supercapacitor application. 1D hollowed CNF was fabricated using dual nozzle electrospinning method, comprising poly (vinyl pyrrolidone) (PVP) as soluble core and polyacrylonitrile (PAN) as shell. PVP core was leached out from electrospun nanofiber mat, leaving a hollowed and porous structure, and then proceeded into two-steps calcination process under air and N2 atmosphere, respectively. The hollowed and porous structure of CNF boosted up the specific surface area of the nanocomposite, and the NiCo2O4 grown around it promoted an overall 3D structure morphology which is beneficial to boost up the electrical conductivity and mechanical stability, leading to enhanced rate capability and superior cycling stability. |
