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research-article

Electrochemical Capacitance Properties of Electrode based on Polyaniline (PANI) coated Graphite Nano Platelets (GnP)/ Polystyrene (PS) Composite Film

[+] Author and Article Information
Tanveer Ul Haq Zia

Landi Akhun, Ring road Peshawar, Khyber pakhtunkhawa 25000 Pakistan tanveerics@gmail.com

Ahmad Nawaz Khan

SCME, Sector H-12 Islamabad, 46000 Pakistan ahmad.nawaz12@gmail.com

Behisht Ara

ICS, University of Peshawar Peshawar, Khyber pakhtunkhawa 25000 Pakistan bahishtara@gmail.com

Kashif Gul

ICS, University of Peshawar Peshawar, Khyber pakhtunkhawa 25000 Pakistan kashifpkh@yahoo.com

1Corresponding author.

Manuscript received April 23, 2019; final manuscript received June 10, 2019; published online xx xx, xxxx. Assoc. Editor: Eui-Hyeok Yang.

ASME doi:10.1115/1.4044063 History: Received April 23, 2019; Accepted June 11, 2019

Abstract

The electrochemical behaviour of the electrode material based on composites of polyaniline (PANI), graphite nanoplatelets (GnP) and polystyrene (PS) matrix was evaluated by applying cyclic voltammetry (CV), galvanostatic charge discharge (GCD) and electrochemical impedance spectroscopy (EIS), for its application in electrochemical supercapacitor which is an advanced energy storing device. Composites were prepared by coating polyaniline on graphite nanoplatelets (PANI/GnP) via in situ emulsion polymerization, exhibiting specific surface area of 178.75 m2/g as compared to 225-275 m2/g of pristine GnP. The PANI/GnP was then embedded in polystyrene matrix (PANI/GnP/PS) which showed improved electrical conductivity due to interconnected mesh of PANI/GnP as confirmed by scanning electron microscopy (SEM) morphological analysis. The formation of porous conductive network in PANI/GnP/PS with conductivity value of 8.6 x 10-3 S/cm resulted in high specific capacitance of 411.3 F/g measured at a current density of 0.5 A/g which corresponded to specific energy of 47.94 Wh/kg and specific power of 281.94 W/kg, as well as the decrease in specific capacitance was 32% even after 1600 charge discharge cycles showing good rate performance which renders it an ideal material for electrodes in supercapacitors.

Copyright © 2019 by ASME
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