| CPC H01G 11/36 (2013.01) [H01G 11/24 (2013.01); H01G 11/28 (2013.01); H01G 11/34 (2013.01); H01G 11/56 (2013.01); H01G 11/86 (2013.01)] | 3 Claims |
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1. A production method of PVA-PAN nanofiber based porous carbon nanofiber electrode for use in solid-state supercapacitors, the method comprising:
preparation of polymer solutions by dissolving a PVA-PAN mixture with a total polymer concentration of 7.5% by weight (67% PAN-33% PVA by mass) in a 2:1 mixture of DMF and DMSO by weight at 80° C. for at least 12 hours;
production of hybrid nanofiber structures by an electrospinning method under determined conditions which are tip-collector distance as 12.5-22.5 cm, a polymer feed rate of 0.5-3 ml/hour, a rotation speed of an aluminum drum of 100-500 rpm, and an applied voltage of 20-35 kV;
by keeping the PAN/PVA hybrid nanofiber surfaces in water at 90° C. for 1-3 hours, the PVA in the hybrid nanofibers is mostly dissolved in hot water and then dried at room temperature, thus producing porous nanofibers, stabilization of nanofibers as a result of oxidation provided by heating with a heating rate of 4° C./min from room temperature to 250-300° C. and then keeping it at 250-300° C. for 60-120 minutes; and
heating from room temperature to 250-300° C. with a heating rate of 5-20° C./min, kept at 250-300° C. for 30-90 minutes, and then it is heated from 250-300° C. to 800-1500° C. with a heating rate of 2-10° C./min and carbonized at 800-1500° C. for 2-5 hours in an argon atmosphere.
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