Fabrication And Electrochemicalproperty Evaluation Of Polypyrrole/Pyrrole Reduced Graphene Oxide/Fabric Electrode

At present,the research on graphene composite fabric supercapacitors has many limitations.First,because most of the reduced graphene oxide is not completely reduced,the remaining oxygen-containing groups will make the reduced graphene oxide easily agglomerate,resulting in electrochemical performance still not close to graphene.Second,eliminating the reduction method of oxygen-containing groups makes the reduction.The binding capacity of the later graphene oxide and other composite materials decreased.Third,the research on the electrochemical performance of polypyrrole after full chain growth on the pyrrole-reduced graphene was very scarce.Aiming at the limitation of the method of eliminating the oxygen-containing reduced graphene oxide fabric electrode and the subsequent binding of the polymerized conductive polymer,this subject proposes a kind of repolymerization using pyrrole reduced graphene oxide(GO)Preparation method of pyrrole and orderly chain growth on graphene,adopting processes such as impregnation,chemical reduction,in situ polymerization,etc.to prepare PPY / N-r GO / PET fabric electrodes.The reduction of pyrrole can effectively reduce GO surface The number of oxygen groups and the generation of polypyrrole oligomers on the surface of graphene oxide make the polypyrrole effective line growth during the polymerization process,and enhance the performance of rubidium capacitance;the excellent electrochemical properties of PPY / N-r GO / PET fabric electrode The electric double layer capacitance provided by the effectively restored and reduced graphene oxide,the rubidium capacitance provided by the polypyrrole oligomers of graphene oxide portion,the effective surface area of the polypyrrole long line and the rubidium capacitance generated during doping / dedoping between anions.On this basis,the subject showed the capacitive performance and cyclic charge-discharge(GCD)of PPY / N-r GO / PET fabric electrodes in Cyclic Voltammetry(CV).)The electrochemical performance in the process has been researched,so that the test results can better reflect the real application situation.The main contents are as follows:(1).Using the low temperature reduction technology of pyrrole,the GO / PET fabric prepared after multiple dipping-drying is reduced,and the GO / PET fabric can achieve a weight increase of 7.5% per unit area.The area specific capacitance of the N-rGO / PET fabric electrode made by reacting at 90? for 6 h reached(26.35 m F · cm-2),and the electrode material did not produce significant polarization.(2).In order to further study the electrochemical performance of the fabric in the reduction process,this topic conducts an in-depth study of the XPS peaking curve of the reduction fabric.The reduction mechanism of reduced fabrics prepared by different reduction methods and the content and distribution of groups on the fabric were explored.In N-r GO / PET fabrics,the characteristic C = O peaks disappeared,and new C-N peaks and C = N peaks appeared at the bond energies of 398.9 e V and 401.2 e V,respectively.The pyrrole oligomers also effectively bind to GO / PET fabrics through covalent bonds while reducing pyrrol.(3).Using in-situ polymerization method to polymerize polypyrrole doped with sodium dodecylsulfonic acid benzene sulfonate(AQSA)on the surface polymerization of N-r GO / PET fabric,the effective surface area of polypyrrole on the fabric electrode surface is much larger than PPY / GO / PET fabric prepared under the conditions(0 ?,1 h),PPY / N-r GO / PET fabric electrodes prepared by fully reacting at 0 ?,8 h.The area specific capacitance at 0.1 m A is 94.5 m F / cm2(378 F / g).The polypyrrole nucleus formed by N-doping reduction of pyrrole can effectively promote chain growth,and the long-chain polypyrrole facilitates the doping and dedoping of anions and polypyrrole in the redox process,thereby providing more excellent electrochemical performance.(4).The PPY / N-r GO / PET fabric electrode is analyzed as the energy storage element after being placed in air and in 0.9% physiological saline solution.Stability of capacitance performance during human contact.The test results showed that the PPY / N-r GO / PET fabric electrode was naturally placed in the air for 1 to 12 days,and the capacitance was significantly reduced on the 5th to 7th days.The capacitance retention rate was 47.13%;it was naturally placed in the 0.9% Na Cl solution for 1.After 12 days,the capacitor performance hardly changes with time,and the capacitor retention rate reaches 94.2% after 12 days.(5).The capacitance retention rate of PPY / N-r GO / PET fabric electrode after bending 1000 times is 88.72%.By studying the electrochemical performance and stability of fabric deformation and various application environments,N-r GO / PET fabric electrode as an energy storage element in the fabric stability and cycle performance.