Recent research has faced challenges in achieving high specific capacitance and cycle stability with carbon nanofibers (CNFs) as supercapacitor electrodes. This study employs calcination/activation techniques to modify the electrochemical and structural properties of electrospun sulfur/nitrogen (S, N)-enriched CNFs. Combining the electrospinning process with these methods produces CNFs with a high energy density, enhancing non-faradaic processes. The 3D interconnected morphology of S, N-enriched CNFs possesses an appropriate surface area of 104.1 m/g at 77 K with the high porous nature. Due to the excellent synergistic effect of nitrogen and sulfur atoms, the as-prepared porous CNFs showed excellent electrochemical performance in a three-electrode assembly. Under a neutral medium, the symmetric two-electrode cell displayed an outstanding electrochemical performance with a specific capacitance of 186F/g, an energy density of 25.8 Wh kg, a power density of 500 W kg and excellent capacitance retention of 88.2 % over 3000 charge–discharge cycles. The findings strongly indicate that the as-prepared CNFs have the potential to advance significantly energy storage technology, surpassing other reported carbon materials.

中文翻译：

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揭示高性能储能装置中富硫和富氮的 3D 多孔碳纳米纤维的电化学卓越性


最近的研究在利用碳纳米纤维（CNF）作为超级电容器电极实现高比电容和循环稳定性方面面临着挑战。本研究采用煅烧/活化技术来改变静电纺丝富含硫/氮 (S, N) 的 CNF 的电化学和结构特性。将静电纺丝工艺与这些方法相结合可产生具有高能量密度的 CNF，从而增强非法拉第工艺。富含 S、N 的 CNF 的 3D 互连形态在 77 K 时具有 104.1 m/g 的适当表面积，并且具有高多孔性。由于氮和硫原子优异的协同效应，所制备的多孔CNF在三电极组装中表现出优异的电化学性能。在中性介质下，对称二电极电池表现出优异的电化学性能，比电容为186F/g，能量密度为25.8 Wh kg，功率密度为500 W kg，3000次充电后电容保持率高达88.2% – 放电周期。研究结果强烈表明，所制备的 CNF 有潜力显着推进储能技术，超越其他报道的碳材料。