| 초록 |
Boron atoms are doped into graphene, forming boron doped graphene (BG) via a catalyst-free thermal annealing approach in the presence of boron oxide. Boron doped Graphene was dissolved in N,N-dimethylformamide and that was dispersed by ultrasonication. Dispersed graphene and PAN were mixed before electrospinning. BG/carbon composite fibers were synthesized by using electrospinning followed by heat treatment. For variable time of chemical polymerization, Polypyrrole was coated on the electrospun BG/carbon composite fibers in order to improve the electrochemical performance. The surface morphology and microstructure of the obtained boron doped graphene /carbon composite fibers were characterized using SEM, TEM. XRD measurements were also carried out to determine the structure of composite fibers. Electrochemical performance of BG/carbon composite fibers was evaluated in initial charge-discharge curve. Capacity of composite fibers was measured using CV equipment. |
