标题：Facile preparation of nitrogen-enriched hierarchical porous carbon nanofibers by Mg(OAc)2-assisted electrospinning for flexible supercapacitors
作者：Zhou, Tong ;Jiang, Qinting ;Wang, Li ;Qiu, Zhipeng ;Liu, Yunyan ;Zhou, Jin ;Liu, Bo
作者机构：[Zhou, Tong ;Jiang, Qinting ;Liu, Yunyan ;Liu, Bo ] Lab of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shand 更多
来源：Applied Surface Science
摘要：Nitrogen-enriched hierarchical porous carbon nanofibers (HPCNFs) with superior capacitance and outstanding mechanical strength are facilely fabricated by electrospinning of Polyacrylonitrile/Magnesium acetate (PAN/Mg(OAc)2) precursor, preoxidation and carbonization of composite nanofibers, which use PAN as carbon source and Mg(OAc)2as precursor of MgO template. The introduction of Mg(OAc)2not only forms the hierarchical porosity with a large specific surface area, but also improve the thermoplasticity and mechanically flexibility of HPCNFs. Under two-electrode configuration, the as-prepared HPCNFs exhibit a high specific capacitance of 263 F g−1at a current density of 1.0 A g−1, good rate capability with a capacitance retention of 157 F g−1up to the current density of 100 A g−1and excellent cycling stability of 94.2% over 10,000 cycles in 6 M KOH electrolyte owing to the synergistic effect of the hierarchical porosity and high nitrogen-enriched level of HPCNFs. Moreover, the flexibility test of HPCNFs demonstrates the excellent mechanical flexibility of HPCNFs, indicating their promising application in flexible energy storage devices.
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