Nitrogen-enriched porous carbon nanofiber networks for binder-free supercapacitors obtained by using a reactive surfactant as a porogen

作者：Huang, Kaibing^*; Li, Min; Chen, Zhenhua; Yao, Yiyuan; Yang, Xiuwen

来源：Electrochimica Acta, 2015, 158: 306-313.

DOI：10.1016/j.electacta.2015.01.122

• Electrospinning
• Poly(acrylonitrile)
• Reactive surfactant
• Allyl polyethylene glycol
• Nitrogen-doping
• Supercapacitor

We present a novel approach to fabricate nitrogen-enriched porous carbon nanofiber networks based on electrospinning from a poly(acrylonitrile) (PAN) solution containing allyl polyethylene glycol (APEG), followed by a thermal treatment. During the pre-oxidation process, the APEG can react with the diene systems formed by the PAN elimination reaction via a Diels-Alder addition. The grafted APEG acts as a porogen, increasing the number and enlarging the size of the micropores, and also increases the nitrogen-doping level in the carbon nanofibers. When used as a binder-free electrode for supercapacitors, the nitrogen-enriched porous carbon nanofiber films can exhibit a specific capacitance of up to 302 F g(-1) at 0.2 Ag-1, retaining 94.6% of their capacitance after 2000 cycles. A power density of 10kWkg(-1) with an energy density of 5.2 Whkg(-1) can be achieved in an aqueous solution. The excellent electrochemical performance of the nanofiber films is attributed to their high specific surface area (753 m(2)g(-1)) and high nitrogen content (5.44%).

• 出版日期2015-3-10
• 单位湖南大学