Free-standing cross-linked activated carbon nanofibers with nitrogen functionality for high-performance supercapacitors
作者： Sihao Yan , Chenguang Tang , Hang Zhang , Zhao Yang , Xuemin Wang
关键词:
摘要: Flexible, heteroatoms-rich activated carbon nanofibers with fascinating cross-linked architectures are successfully gained in a facile and controllable way via electrospinning polyacrylonitrile (PAN) /dicyandiamide (DICY) composite followed by carbonation CO2 activation process. The unique inter-bonded structures heteroatoms contents could be easily controlled adjusting the preoxidation temperature applied calcining procedure addition of DICY. Significantly, resultant samples display hierarchical pores micro/meso/macropores, abundant N, O species doped fiber-fiber interconnections, which considerably boost electrochemical properties. As an electrode material, N-doped (ANCLCNFs) show high capacitance 323 F g-1 current density 0.5 A g-1, excellent rate capacity (230.1 at 20 g-1) long-term duration (over 95% after 10000 cycles). Furthermore, symmetrical supercapacitor delivers maximum energy 14.3 Wh kg-1 power 162.5 W kg-1.
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