Synthesis and Characterization of Polyaniline/MgTiO3 Composite with Excellent Thermal and Electrochemical Performance

This article explores the effects of doping ferroelectric materials MgTiO3 with different proportions on the properties of polyaniline (PANI). PANI / MgTiO3 composites were prepared by in-situ composite method. Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) were used to characterize the structure of the composites. Scanning electron microscope (SEM) was used to characterize the morphology of the composites.The thermal stability of the composites was investigated by thermogravimetry (TG) and derivative thermogravimetry (DTG). Electrochemical methods (cyclic voltammetry(CV), electrochemical impedance spectroscopy(EIS), and constant current charge-discharge test) were used to compare and analyze the electrochemical performance of the composites.TG-DTG analysis and electrochemical experiments all show that the thermal stability and electrochemical properties of the PANI / MgTiO3 composite with a mass ratio of 82/18 (w/w) are the best. The results indicate that there is a synergistic effect between PANI and MgTiO3, which improves the performances of the PANI when the appropriate amount of MgTiO3 is added.