Javed Iqbal1, Mohammad Omaish Ansari1, Arshid Numan2, S Wageh3,4, Ahmed Al-Ghamdi3, Mohd Gulfam Alam5, Pramod Kumar6, Rashida Jafer3, Shahid Bashir7, A H Rajpar8. 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.
In this study, ternary composites of polyaniline (n class="Chemical">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.
Entities:
Keywords:
CNT; MnO2; conducting polymer; energy storage device; polyaniline; supercapattery
Authors: Javed Iqbal; Arshid Numan; Mohammad Omaish Ansari; Rashida Jafer; Priyanka R Jagadish; Shahid Bashir; P M Z Hasan; Anwar L Bilgrami; Sharifah Mohamad; K Ramesh; S Ramesh Journal: Polymers (Basel) Date: 2020-11-27 Impact factor: 4.329