石墨烯对静电纺丝合成碳纳米纤维电化学性能的影响

D. V. Jamkar, H. V. Ganvir, R. Mahajan, S. Kondawar, P. Kumar
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引用次数: 0

摘要

采用静电纺丝法制备了聚丙烯腈(PAN)/N,N-二甲基甲酰胺(DMF)纳米碳纤维,并在石英管状炉中进行了稳定和碳化。利用石墨烯纳米片和静电纺丝技术制备多孔石墨烯/碳纳米纤维(G/CNFs),改善了制备样品的电化学性能。进一步对制备的样品进行紫外可见光谱和扫描电子显微镜(SEM)检测。这些研究揭示了纳米尺度的CNFs和G/CNFs的直径在300-600 nm之间变化,具有较大的孔隙率。采用循环伏安法研究了制备(纯)和石墨烯包埋样品在不同扫描速率下的电化学性能。纯CNFs表现出具有尖锐氧化还原峰的变形矩形CV曲线,而G/CNFs具有类似双层电容器的没有氧化还原峰的大致矩形轮廓。采用恒流充放电技术测量比电容。CNFs和G/CNFs样品反映出电化学性能的改善,这可能与石墨烯纳米片的相互作用有关,石墨烯纳米片的相互作用提高了G/CNFs的内部导电性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of graphene on electrochemical performance of carbon nanofibers synthesized by electrospinning
Carbon nanofibers (CNFs) of polyacrylonitrile (PAN)/N,N-dimethyl formamide (DMF) solution were synthesized by electrospinning method proceeded by stabilisation and carbonization in a tubular furnace of quartz. The electrochemical behaviour of the prepared sample was improved by employing Graphene nanosheets and porous graphene/carbon nanofibers (G/CNFs) via electrospinning technique were prepared. Further prepared samples were examined by UV-VIS spectroscopy and scanning electron microscopy (SEM). These studies reveal nanoscale fibres of CNFs and G/CNFs with varying diameters from 300-600 nm with substantial porosity. The electrochemical performance of as prepared(pure) and Graphene embedded samples were studied at various scan rates using cyclic voltammetry. Pure CNFs exhibit a deformed rectangular CV curve with sharp redox peaks, whereas G/CNFs have a roughly rectangleprofile without redox peaks analogous to double-layer capacitor. Galvanostatic charge - discharged technique was employed for the measurement of specific capacitance. Samples CNFs and G/CNFs reflect improved electrochemical performance that may be corelated to the interlaying graphene nanosheets, which improves the internal electrical conductivity of G/CNFs.
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