Preparation And Research Of Flexible Supercapacitors Fabricated By Electrospinning Nanofibers

Supercapaitors have been recongnized as a new type of energy storage element which has a performance intermediate between a conventional capacitor and a chemical battery.Supercapacitors have a higher energy density than conventional capacitors.And compared to chemical batteries,supercapacitors have greater power density.The current research on supercapacitors is mainly focused on the preparation of high-performance electrode materials.Three kinds of electrode materials were prepared in this paper,and this dissertation has reasearched on the electrode materials perparation and capacitive property.The main conclusions of this paper are as follows:?1?A conductive cotton yarn?1?/cm?was prepared by electroless nickel plating for4.5h,and a polypyrrole composite material was prepared by electrospinning nanofiber yarn forming technology and in-situ polymerization for 4.5h,with a large specific surface area?16.70m²/g?.And the material exhibits a large specific capacity of 27.77F/g,a capacity retention(3000^th,90%)under repeated bending,and a large power density?800m W/cm³?,which is close to a commercial capacitor.?2?Based on the nickel plating 4.5h and the polymerization time 4.5h,when the content of graphene is 1%of the PAN mass of the spinning solution solute,the best composite surface with polypyrrole,with a larger specific surface area?17.03m²/g?,and exhibited a large specific capacity of 45.0F/cm³.Under repeated bending,it still has a good capacity retention rate(3000^th,92%)and a relatively large power density?890m W/cm³?.The current literature is similar.The doping of graphene increases the specific surface area of the material,increases the electrical conductivity of the material,and optimizes the cycle stability of the material.?3?The PEDOT:PSS flexible composites were prepared by electroless nickel plating,electrospinning nanofibers,and in situ polymerization for 24h.The material has a specific surface area?5.33m²/g?and a large storage capacity of 25.01F/g.Under repeated bending there is still a higher capacity retention(3000^th,90%)and a higher power density?580m W/cm³?.