| 초록 |
Nitrogen(N), fluorine(F)-doped hollow mesoporous carbon nanospheres (denoted as NF-HMCs) are prepared based on the template of silica core/mesoporous silica shell nanospheres. These nanospheres possess a large surface area and well-defined pore structure. They were impregnated with sulfur through a melt-diffusion method to be fabricated to prepare the cathode for lithium-sulfur (Li-S) battery applications. The cathode fabricated with NF-HMCs delivered a high reversible capacity and coulombic efficiency (623.7 mAh/g, 99.7 % at 0.2 C after 200 cycles). Simultaneously, the F-doped hollow mesoporous carbon nanospheres (F-HMCs) having a large surface area and well-defined pore structure were prepared based on the template of a crosslinked PS-core with a mesoporous silica shell. F-HMCs were also fabricated into an electrode in the supercapacitor applications. The capacitance value measured after 10,000 cycles was about 162.8 F/g at 1 A/g and maintained about 93.6 % of the initial value. |
