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In this study, ternary composites of polyaniline (PANI) with manganese dioxide (MnO 2 ) nanorods and carbon nanotubes (CNTs) were prepared by employing a hydrothermal methodology and in-situ oxidative polymerization of aniline. The morphological analysis by scanning electron microscopy showed that the MnO 2 possessed nanorod like structures in its pristine form, while in the ternary PANI@CNT/MnO 2 composite, coating of PANI over CNT/MnO 2 , rods/tubes were evidently seen. The structural analysis by X-ray diffraction and X-ray photoelectron spectroscopy showed peaks corresponding to MnO 2 , PANI and CNT, which suggested efficacy of the synthesis methodology. The electrochemical performance in contrast to individual components revealed the enhanced performance of PANI@CNT/MnO 2 composite due to the synergistic/additional effect of PANI, CNT and MnO 2 compared to pure MnO 2 , PANI and PANI@CNT. The PANI@CNT/MnO 2 ternary composite exhibited an excellent specific capacity of 143.26 C g -1 at a scan rate of 3 mV s -1 . The cyclic stability of the supercapattery (PANI@CNT/MnO 2 /activated carbon)-consisting of a battery type electrode-demonstrated a gradual increase in specific capacity with continuous charge-discharge over ~1000 cycles and showed a cyclic stability of 119% compared to its initial value after 3500 cycles.

polymers

Hydrothermally Assisted Synthesis of Porous Polyaniline@Carbon Nanotubes–Manganese Dioxide Ternary Composite for Potential Application in Supercapattery