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

Javed Iqbal; Mohammad Omaish Ansari; Arshid Numan; S Wageh; Ahmed Al-Ghamdi; Mohd Gulfam Alam; Pramod Kumar; Rashida Jafer; Shahid Bashir; A H Rajpar

doi:10.3390/polym12122918

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

Polymers (Basel). 2020 Dec 5;12(12):2918. doi: 10.3390/polym12122918.

Authors

Javed Iqbal¹, Mohammad Omaish Ansari¹, Arshid Numan², S Wageh^{3

4}, Ahmed Al-Ghamdi³, Mohd Gulfam Alam⁵, Pramod Kumar⁶, Rashida Jafer³, Shahid Bashir⁷, A H Rajpar⁸

Affiliations

¹ Center of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
² State Key Laboratory of ASIC and System, SIST, Fudan University, Shanghai 200433, China.
³ Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
⁴ Physics and Engineering Mathematics Department, Faculty of Electronic Engineering, Menoufia University, Menoufia 32952, Egypt.
⁵ Department of Chemistry, Faculty of Science, Islamic University of Madinah, Madinah 42351, Saudi Arabia.
⁶ Department of Chemistry, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, V. B. S. Purvanchal University, Jaunpur 222003, India.
⁷ Center for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
⁸ Mechanical Engineering Department, Jouf University, Sakaka 42421, Saudi Arabia.

Abstract

In this study, ternary composites of polyaniline (PANI) with manganese dioxide (MnO₂) 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 MnO₂ possessed nanorod like structures in its pristine form, while in the ternary PANI@CNT/MnO₂ composite, coating of PANI over CNT/MnO₂, rods/tubes were evidently seen. The structural analysis by X-ray diffraction and X-ray photoelectron spectroscopy showed peaks corresponding to MnO₂, 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/MnO₂ composite due to the synergistic/additional effect of PANI, CNT and MnO₂ compared to pure MnO₂, PANI and PANI@CNT. The PANI@CNT/MnO₂ 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/MnO₂/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.

Keywords: CNT; MnO2; conducting polymer; energy storage device; polyaniline; supercapattery.