Abstract: Polypyrrole/Ni/graphite nanosheet (PPy/Ni/NanoG)was prepared via insitu polymerization,using polypyrrole (PPy) as a matrix, FeCl3 as an oxidant, sodium dodecyl benzene sulfonate (DBSNa) as a doping agent, nickle coated graphite nanosheets (Ni/NanoG) as a twodimensional nanofiller.Microstructure and electrical performance of the composites were characterized. It was found that the surfaces and edges of Ni/NanoG sheet were coated by PPy particles, the curling and cross linking of PPy molecular chain could be effectively suppressed by the barrier effect of Ni/NanoG, and the conductivity of the composites was improved by the enhanced conjugation of PPy molecules and increased π electron delocalization. Comparison of cyclic voltammetry between PPy and PPy/Ni/NanoG composites indicated that the conducting property of the composites was higher than that of polymers. The conductivity increased from 8.2 to 103.6 S/cm as Ni/NanoG content reaching 2 wt%.

Key words: polypyrrole, NanoG, in-situ polymerization, conductivity