| 초록 |
Both Al(III) acetate and Fe(II) acetate are completely dissolved in N,N-dimethylforamide (DMF) with appropriate heating, and subsequently the composite solutions are prepared by mixing polyacrylonitrile (PAN)-based polymer solution in DMF into the metal solution. The Al/Fe-embedded CNFs are synthesized by stabilizing for 5 hr at 280℃ in air and carbonizing for 1 hr at 800℃ in N2 after electrospinning the composite solution. Al/Fe-embedded CNFs shows the fully interconnected pore structures with high porosity, large specific surface area and good aspect ratio. Both Al and Fe in CNFs are well distributed at nano-sized particles. As a result, Al-Fe/CNFs represent good cycle performance with coulomb efficiency due to the promotion of both electron transfer and ion transfer. |
