聚苯胺包覆电纺纳米碳纤维的制备及其超级电容性能.pdfVIP

Abstract Abstract Supercapacitor is a new kind of energy storage device, which has the advantages of fast charge/discharge speed, high power density, long durability, and environmental friendliness. Electrode material is one of the key factors influencing the supercapacitive performance. High performance supercapacitors may be fabricated using the carbon nanofibers/polyaniline (PANI/CNFs) composites by combining the electrical double-layer capacitance provided by the CNFs and the pseudocapacitance provided by PANI. In this study, PANI encapsulated electrospun carbon nanofibers were produced by in situ polymerization. SEM, XRD, FT-IR and Raman Spectroscopy were used to study the structure of the PANI/CNFs composite fibers. The supercapacitive performance of the PANI/CNFs was investigated by cyclic voltammetry(CV), galvanostatic charge-discharge(CD), and electrochemical impedance spectroscopy(EIS) using a electrochemical workstation. The CNFs were produced by electrospinning and carbonozation using PAN as the precursor. In this part, the concentration of PAN and the protective atmosphere for carbonization were studied. SEM observation indicates that the CNFs prepared at PAN concentration of 3 % (wt/v) are uniform and continuous. NH3 has etching reactivity on the CNFs and the surface of the CNFs carbonized in NH3 is rough. Two kinds of oxidant were used when preparing the PANI/CNFs composite nanofibers by in situ polymeration of aniline, i.e. APS and FeCl . When using APS as 3 the oxidant for preparing the PANI/CNFs nanofibers