Preparation and characterization of bacterial cellulose@polypyrrole-single wall carbon nanotube conductive films

In order to obtain flexible high-conductivity conductive materials, a novel conductive film of bacterial cellulose@polypyrrole-single wall carbon nanotubes(BC@PPy-SWCNTs) composite films was prepared by simple in situ oxidative polymerization and vacuum filtration using BC, pyrrole (Py) and SWCNTs as the raw materials without any adhesive. The surface morphology and chemical composition of BC@PPy-SWCNTs composite films were characterized by SEM and FTIR. The electrochemical properties of BC@PPy-SWCNTs composite films were studied. The results demonstrate that when the 4.7% mass ratio of SWCNTs is added, the conductivity of BC@PPy-SWCNTs film can reach 6.42 S·cm^-1, which is much higher than that of BC@PPy film. When the charging current is 5 mA·cm^-2, the area capacitance of BC@PPy-SWCNTs composite films can reach 0.53 F·cm^-2 with an energy density of 0.036 mWh·cm^-2 and a power density of 1.75 mW·cm^-2, respectively. The film widens the variety of BC@PPy-SWCNTs composite films electrode composite films, which has a great possibility for use in supercapacitors, batteries, and sensors.