Structure Characterization and Conductive Performance of Polypyrrol-Molybdenum Disulfide Intercalation Materials

Two types of polypyrrol/molybdenum disulfide nanocomposite were prepared by means of in situ polymerization of the intercalated monomers. The nanocomposites were characterized by means of powder X-ray diffraction, Fourier transformation infrared spectroscopy, scanning electron microscopy and transmission electron microscopy. The charge transport properties of the nanocomposites were determined by four-probe electrical conductivity measurement of pressed pellet samples. The relationship between the electrical conductivity at various temperatures and conformation of the polypyrrol/molybdenum disulfide nanocomposites were investigated. Results indicated that polypyrrol took two kinds of conformation in the interlayer of MoS₂. The electrical conductivity of the intercalation nanocomposites at room temperature was dependent on the conformation and stereo-regular characteristics of the polypyrrol molecules in the MoS ₂ layers; it was mainly determined by the number of the active charge carriers in polypyrrol at -60°C. The intercalation of polypyrrol into MoS₂ led to an increase in the electrical conductivity by six orders of magnitude.