Reduced Graphene Oxide/Poly(Pyrrole-co-Thiophene) Hybrid Composite Materials: Synthesis, Characterization, and Supercapacitive Properties

Polymers

Sami Ullah¹  Gul Rahman¹  Humaira Seema¹  Anwarul Haq Ali Shah¹  Salma Bilal² 

[1] Institute of Chemical Sciences, University of Peshawar, Peshawar 25120, Pakistan;National Center of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan;

关键词: reduced graphene oxide (RGO);    poly(pyrrole-co-thiophene) (COP);    supercapacitor;    energy density;    power density;   

DOI  :  10.3390/polym12051110

来源: DOAJ

【 摘 要 】

Reduced graphene oxide/poly(pyrrol-co-thiophene) (RGO/COP), prepared by facile in-situ oxidative copolymerization, is reported as a new hybrid composite material with improved supercapacitance performance as compared to the respective homopolymers and their composites with RGO. The as-prepared hybrid materials were characterized with ultraviolet–visible (UV–Vis) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) analysis. The electrochemical behavior and energy storage properties of the materials were tested by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrostatic impedance spectroscopy (EIS) techniques in 0.5 M H₂SO₄. The specific capacitance (Csp) for RGO/COP calculated from the CV curve was 467 F/g at a scan rate of 10 mV/s. While the Csp calculated from the GCD was 417 F/g at a current density of 0.81 A/g. The energy density calculated was 86.4 Wh/kg with a power density of 630 W/kg. The hybrid composite exhibits good cyclic stability with 65% capacitance retention after 1000 cycles at a scan rate of 100 mV/s. The present work brings a significance development of RGO/COP composites to the electrode materials for pseudocapacitive application.

【 授权许可】

Unknown