Preparation of rGO/Ag/PEDOT nanocomposites for supercapacitors

ABSTRACT

The hybrid nanocomposite based on poly(3,4-ethylenedioxythiophene)/Ag nanoparticle/reduced graphene oxide (rGO) was prepared by hydrazine hydrate. The nanocomposite materials have been characterized by scanning electron microscopy-energy dispersion X-ray analysis (SEM-EDX), and Fourier transform infrared-Attenuated transmission reflectance (FTIR-ATR). Electrochemical performance of the electrodes is studied by cyclic voltammetry (CV), galvanostatic charge-discharge measurements (GCD) and electrochemical impedance spectroscopy (EIS) in 1.0 M H₂SO₄ solution. We demonstrate a facile and efficient to prepare rGO/Ag/PEDOT nanocomposite for supercapacitor electrode applications. Compared with the PEDOT (C_sp= 65.56 F/g at 4 mV/s) the areal capacitance of rGO/Ag/PEDOT nanocomposite (C_sp= 612.69 F/g at 4 mV/s) is enhanced with nearly 9.34 times in 1 M H₂SO₄ solution. In composite electrode, Ag nanoparticles and rGO act as the electrode active materials in chemical polymerization process. In addition, the rGO/Ag/PEDOT nanocomposite showed excellent cycling stability, retaining 101.8% of the initial capacitance with the continuous charge/discharge processes for 1000 cycles.

Graphical Abstract

KEYWORDS:

• PEDOT
• symmetric supercapacitor
• energy density
• Ag nanoparticle
• graphene
• nanocomposite

Author contributions

The manuscript was written through the contributions of all authors. All authors have given approval to the final version of the manuscript.

Acknowledgments

We thank to Namik Kemal University, Tekirdag, Turkey (project number: NKUBAP.01.GA.16.076) for financial support. Authors also thank to Expert Muhammet Aydın (Namik Kemal Uni., NABILTEM, Tekirdag, Turkey) for recording SEM-EDX and FTIR-ATR measurements.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Namik Kemal University [NKUBAP.01.GA.16.076].