Polypyrrole (PPy) has been one of the most promising conducting polymers in view of its good bio-compatibility, good environmental stability and ease of synthesis, but its applications are limited because of its poor processing performances and relatively high conductivity. Meanwhile, carbon nanotubes (CNTs) are considered as being essential for advanced composites due to their remarkably mechanical and electrical properties, high special area and aspect ratios. Recently, in order to produce superior materials with high surface area, conductivity, electrochemical stability and mechanical properties, many researchers have focused on the combination of conducting polymers and CNTs by chemical and electrochemical synthesis. Compared with pure PPy film, the performances of PPy/CNTs composite film were improved, such as electrochemical capacitance[1–6], electrochemical redox behavior [7], conductivity [8–10] etc.
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