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High performance capacitor devices based on electric double layer capacitor (EDLC) principle has wide advantage of higher range of cyclic stability, rate capability, temperature durability and chemically resistant. Carbon based materials such as graphene, carbon nanotubes, activated carbon and carbon nanofibers are well known supercapacitor materials derived till date. Creating pores within the physical structure has found to improve the EDLC capabilities of the material. Exfoliation of graphene, activation of carbon and activation of nanofibers via various different techniques seem to be too complicated, non-consistent and needs wide range of control parameters. Facile immiscible polymer blend technique followed by thermal treatment is used to create porous carbon nanofibers producing higher surface area of 86 m2/g. X-ray diffraction spectroscopy shows the peak at 26.3o which is for graphitic phase of carbon. Cyclic voltammetry and galvanostatic charge discharge results showed around ~ 350% of capacitance improvement for porous nanofiber to that of pure carbon nanofiber. Temperature dependence study suggested 160% capacitance improvement for the device. Electrochemical impedance spectroscopy suggests the possible reduction in resistance of the material with increasing temperature. Material showed capacitance retention of above 100% for 5000 charge-discharge cycles.



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