Fabrication and Characterization of Graphene Oxide/Polyaniline Electrode Composite for High Performance Supercapacitors

Abstract

A novel graphene oxide/polyaniline (GO/PANI) composite is synthesized by a facile two-step approach. In this way, graphene oxide (GO) is prepared by modified Hummer's method and then serves as the substrate for the growth of polyaniline (PANI). With the addition of hexadecyltrimethylammonium bromide (CTAB), GO is evenly distributed in solution and aniline monomers are easily attached to the surface of GO. At 15°C, PANI not only has good conductivity also can be uniformly distributed on the graphene sheets. The composite exhibits great electrochemical performance when applied in supercapacitors with a specific capacitance of 405 F/g at 1 A/g with 80% content of PANI, which is superior to its individual components. The maximum specific capacitance of 665 F/g has been obtained at 10 mV/s in virtue of the electrochemical double layer capacitance and the pseudocapacitance. This consequent provides a valuable reference for the development of high-efficiency energy storage equipment.

Evaluation of the Synergistic Effect of Graphene Oxide Sheets and Co3O4 Wrapped with Vertically Aligned Arrays of Poly (Aniline-Co-Melamine) Nanofibers for Energy Storage Applications

“…It also facilitates the anchoring of different organic and inorganic groups to form composites. Further, water molecules can be readily adsorbed on the surface of GO due to the presence of oxygenated functional groups, which is responsible for the more interplanar distance in GO sheets (0.87 nm) than graphite (0.340 nm) [10,39,45,47,[55][56][57] Figure 6a. The pristine PANI is identified by the appearance of XRD peaks indexed at 25.21 • , 21.07 • and 15.2 • synchronized with the semi-crystalline plane at (200), (020), and (011), respectively, validating the successful synthesis of polyaniline [7,47,56,58].…”

“…This technique develops a better understanding of intrinsic resistance, diffusion of ions, and charge transfer kinetics at the electrode [10]. In the low-frequency region, the appearance of a vertical line parallel to the imaginary axis relates to the capacitive signature of the electrode and is termed the Warburg effect [57,76]. The equivalent series resistance (ESR) of the electrode is credited to internal resistance offered by the electrode, resistance due to electrolytic ion and contact resistance [77], and is calculated from the first place where the semicircle touches the real impedance axis [10,38].…”

Ammonia Modified MXene/Aniline Copolymers Electrochemical Sensors for Ultrasensitive Sensing Glutathione

“…[20,21] Nevertheless, just like other conducting polymers, PANI has a relatively lower surface area when it serves as the single electrode material suffering from volume change and structure destruction. [22] In order to overcome these shortcomings, the combination of PANI with 2D MXene materials has been investigated for supercapacitors. [23,24] However, the performance of MXene/PANI for electrochemical sensors needs to be further improved.…”

“…Polyaniline (PANI) has been considered as a potential electrode material with high performance due to its excellent electroactivity, good environmental stability, interesting redox properties, easy synthesis route, and low cost [20,21] . Nevertheless, just like other conducting polymers, PANI has a relatively lower surface area when it serves as the single electrode material suffering from volume change and structure destruction [22] . In order to overcome these shortcomings, the combination of PANI with 2D MXene materials has been investigated for supercapacitors [23,24] .…”

Cyclic Voltammetry and Galvanostatic Charge-Discharge Analyses of Polyaniline/Graphene Oxide Nanocomposite based Supercapacitor

“…Supercapacitors are attractive in delivering better power efficiency than traditional capacitors and batteries due to their long cycles, protection, good stability, and environmental friendliness [1]. It also has great features, such as being capable of storing 10 -100 times more energy per unit volume than electrolyte condensers, being able to tolerate and handle charging much quicker than batteries, and tolerating much more charging and discharge cycles than rechargeable batteries.…”