| 초록 |
In this study, we have synthesized hybrid structures composed of ZnO quantum dots (QDs)@carbon particles and carbon nanofibers (CNFs) by the single carbonization process of electrospun zeolitic imidazolate framework-8 (ZIF-8)/poly(vinyl alcohol) (PVA) nanofibers. During the carbonization process, the oxygen-rich PVA nanofibers, which are utilized as CNF precursors in this work, provide abundant oxygen sources to surrounding ZIF-8s, resulting in the transformation of ZIF-8s to ZnO QDs@carbon particles on the CNF surface. By combining the hierarchical porous structure and one-dimensional morphology, this unique structure exhibits a high surface area and enhanced conductivity. Accordingly, this newly designed electrode material for supercapacitors demonstrates outstanding electrochemical performance with high capacitance (346 F g−1 at 0.5 A g−1), reliable rate capability (79% capacitance retention at 8 A g−1), and a long cycle life of over 5,000 cycles. |
