Study Of The Electrochemical Properties Of Polyaniline And Carbonaceous Material / Polyaniline Complex

The interaction and synergistic effect between nano-carbon and conductive polymer are beneficial to the polymer's electrochemical property. So the composites attract much attention recently. It's helpful to the diffusion of electrolyte ion that the special core-shell structure between carbon nanotube and polyaniline(PANi) and the high specific surface of graphene. So the polyaniline's electrochemical property is improved because of that.This article focused on the electrochemical property of PANi,carbon nanotube/polyaniline(CNT/PANi) and graphene/polyaniline (GC/PANi) and analysed the effect of nano-carbon on PANi by comparing the results.First,Using the way of conventional electrochemical deposition can produce PANi, CNT/PANi and GC/PANi. The composites' surface topography can be confirmed through SEM,TEM and IR absorption spectrum that verify the combination of CNT and PANi. In addition, the composites formed a special core-shell structure that CNT was wrapped by PANi uniformly through the electron micrograph.Secondly, the conductivity and charge carriers mobility of PANi and nano-carbon/PANi composites in broad potential and doped area can be measured by a novel electrochemical methord. By contrast,it's found that the conductivity and mobility of CNT/PANi,GC/PANi are higher than pure PANi. Thirdly, Galvanostatic charge-discharge tests were carried out with different current density to evaluate the capacitance of PANi and CN/PANi. The results reveal that the specific capacitance of composites is higher than pure PANi. Consequently,the special structure and strong interaction between the nano-carbon and PANi are beneficial to the charge transportation which improves the electrochemical property; In addition, the capacitance is improved due to the synergistic effect between nano-carbon and PANi.