Characterization and Analysis of the Electrochemical Properties of the Polyaniline Synthesized by Emulsion Polymerization in Constant Magnetic Field (0.4 T)

摘要

A new, convenient and economical method was established firstly, which took loaded polyaniline (PANI) carbon paper as the working electrode to real-time characterize and analyze the electrochemical properties of the PANI synthesized by emulsion polymerization in constant magnetic field (MF, 0.4 T). The characterization results of the electrochemical properties of the PANI had been proved by contrast analysis of the thermal stability of conductivity, FT-IR, XRD and TGA of the PANI. The experimental results of cyclic voltammogram, AC impedance, Tafel curve and electrochemical stability showed that the PANI synthesized in the presence of the MF had larger redox current, smaller charge resistance, higher corrosion potential and better electrochemical stability. The PANI thermal stability of conductivity had been measured in the temperature range from 20 to 140°C, and the results showed that the PANI synthesized in the presence of the MF had better thermal stability of conductivity. The results of FT-IR, XRD and TGA indicated that the characteristic peaks of FT-IR spectra of the PANI synthesized in the presence of the MF shifted to the lower wavenumbers, and its crystallinity and thermal stability were also improved.