One-dimensional porous carbon nanofibers have become a popular choice for supercapacitor electrode materials due to their high specific surface area,large aspect ratio,and efficient electron transport.In this study,honeycomb porous carbon nanofibers were synthesized using electrospinning technique,where polyvinyl-pyrrolidone(PVP)served as the carbon precursor and polytetrafluoroethylene(PTFE)emulsion acted as the pore-forming agent,followed by a high-temperature carbonization process.The morphology and structure of the prepared electrode materials were characterized using SEM,TEM,Raman spectroscopy,XRD,and Brunauer-Emmett-Teller(BET)analysis.Furthermore,the influence of pore-forming agent content on the fiber morphology,pore structure,and electrochemical performance was investigated.The results reveal that when the mass ratio of PVP:PTFE in the spinning solution is 1:10,the resulting electrode material exhibites the maximum specific sur-face area of 165 m2/g.Moreover,at a current density of 0.5 A·g-1,it achieves a high specific capacitance of 277.5 F·g-1.In a two-electrode system,the power density reaches 250 W/kg,resulting in an energy density of 31.6 W·h/kg.Additionally,after 10 000 charge-discharge cycles,the capacitance retention remains as high as 98.4％,indicating excellent capacitive and cycling performance of the fabricated electrode material.Such a unique porous carbon nanofibers electrode material with its high porosity and honeycomb-like structure can offer abundant active sites for charge storage and provide convenient pathways for fast electron/ion transport,which holds significant reference and guidance for the development of high-performance supercapacitor electrode materials.
electro-blowing spinninghoneycomb-like porouscarbon nanofiberpore forming agentsuperca-pacitorelectrode material
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