A simple approach of constructing sulfur-containing porous carbon nanotubes for high-performance supercapacitors

作者：Liu, Wei; Tang, Yakun; Sun, Zhipeng; Gao, Shasha; Ma, Junhong^*; Liu, Lang^*

来源：Carbon, 2017, 115: 754-762.

DOI：10.1016/j.carbon.2017.01.070

• ORDERED MESOPOROUS CARBON
• ENERGY-STORAGE
• ACTIVATED CARBONS
• SURFACE-AREA
• CARBONIZATION
• GRAPHENE
• NITROGEN
• FABRICATION
• DENSITY

Porous carbon nanotubes (PCNTs) containing sulfur were successfully fabricated through a simple approach, which is the simultaneous activation and carbonization of sulfonated polydivinylbenzene nanotubes with KOH. The PCNTs take on hierarchical porous structure composed of well interconnected mesopores and numerous micropores. Chemical analysis shows that the PCNTs contain sulfide and sulfone groups. When assessed as electrodes by a three-electrode system in 6 M KOH aqueous solution, the PCNTs displayed the excellent electrochemical performance. An optimal sample of PCNTs activated at 650 degrees C for 3 h not only exhibits a high specific capacitance of 331 F g(-1) at 1 A g(-1), but also shows considerable rate capability with the retention of 80.4% at 20 A g(-1). Additionally, it has the good cycling performance with 84% capacitance retention, while a high capability of about 243 F g(-1) still reaches over 5000 cycles at 5 A g(-1). We presented a promising route to scale-up synthesize porous carbon nanotube elettrode materials for high-performance supercapacitors.

• 出版日期2017-5
• 单位中国科学院长春应用化学研究所; 新疆大学