Preparation of Polyaniline Graphene Carbon Nanotubes Three-dimensional Composites with High Rate Performance

Abstract

Composites of polyaniline (PANI), graphene (RGO) and carbon nanotubes (CNTs) were prepared by in situ polymerization. The morphologies of the composites were examined by scanning electron microscopy and transmission electron microscopy, which showed that PANI were coated onto the surface of RGO and CNTs homogeneously and PANI/CNTs were embedded between and/or bridged PANI/RGO sheets. The composites with three-dimensional porous structure possessed higher specific surface area and pore volume compared to those of PANI and PANI/RGO. Such three-dimensional composites exhibited good capacitive performance during the rapid charge-discharge process. The capacitance values of PANI/RGO/CNTs were717 F g-1 and 450 F g-1 at the current densities of 1mV s-1and 200 mV s-1, respectively. The capacitance retention was 62.7% which was higher than that of PANI/RGO and PANI. The cycling performance indicated the long life stability of PANI/RGO/CNTs.