Polypyrrole doped by Zn2+ ions was synthesized as nanocomposites with MWCNT by in‐situ oxidative polymerization and investigated as electrode material for supercapacitors. The uniform coating of polypyrrole on MWCNT was characterized by field emission scanning electron microscopy (FESEM) and high resolution transmission electron microscopy (HRTEM). The effect of Zn2+ ions were characterized by Fourier transform infrared (FTIR) spectroscopy. The electrochemical performances were investigated by cyclic voltammetry (CV), constant current charging/discharging cyclic test (CC) and electrochemical impedance spectroscopy (EIS) using a three‐electrode system. The doped polypyrrole composites show higher specific capacitance and better cyclic stability.
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Karthikeyan et al. (2012) studied this question.
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