Preparation and Electrochemical Properties of Polyaniline Grafted Graphene Composites

摘要

In order to improve the cycle stability of polyaniline and graphene composites, the hummers method was used to prepare graphene oxide (GO), which was modified by amination. On the basis of this, polyaniline was prepared by in situ oxidative polymerization. Aniline grafted graphene (rGO-PANI) composite. The morphology of the structure was characterized by scanning electron microscopy (SEM). X-ray diffraction (XRD) was used to characterize its crystal structure. The infrared (FTIR), Raman and Ra-Vi (UV-vis) spectra were used to characterize the functional structure. The conductivity was tested by four probes, and the electrochemical performance of the electrochemical workstation was tested and compared with the non-grafted polyaniline/graphene composite (rGO/ PANI). The results show that polyaniline in the polyaniline grafted graphene composite is covalently bonded to graphene. The polyaniline grafted graphene composite material has improved cycle stability, and the capacity is only lost by 5% after 100 cycles, while the non-graft type loss is 15%. At the same time, the material has good electrical conductivity, the resistivity can reach 0.3Ω?cm, and has good charge storage performance, and the mass ratio capacitance can reach 603F/g.