| 초록 |
Here, we report the facile synthesis of silicon nanotubes using a surface sol-gel reaction on pyridine nanowire templates and the investigations on their performance for energy storage. Electro-spun polyacrylonitrile nanowires were transformed to protonated pyridine nanowires by air pyrolysis. Their surfaces act as acid catalyst sites for the hydrolysis of TEOS, and as a result hybrid pyridine/silica core-shell nanowires can be fabricated by a surface sol-gel reaction. Silica nanotubes could be obtained from the silica/pyridine hybrid nanostructure by simply removing the core organic nanowires by additional air pyrolysis. The silica nanotubes were converted into silicon nanotubes while retaining its framework via magnesium reduction. The electrochemical activity of silicon nanotubes showed excellent cycle stability over 50 cycles, suggesting that the hollow one-dimensional structure would be a good candidate for a high-capacity anode for a lithium ion battery. |
