Study on Direct Synthesis of Energy Efficient Multifunctional Polyaniline–Graphene Oxide Nanocomposite and Its Application in Aqueous Symmetric Supercapacitor Devices

Abstract

The synthesis of promising nanocomposite materials can always be tricky and depends a lot on the method of synthesis itself. Developing such synthesis routes, which are not only simple but also can effectively catch up the synergy of the compositing material, is definitely a worthy contribution towards nanomaterial science. Carbon-based materials, such as graphene oxide, and conjugative polymers, such as conductive polyaniline, are considered materials of the 21st century. This study involves a simple one pot synthesis route for obtaining a nanocomposite of polyaniline and graphene oxide with synergistic effects. The study was carried out in a systematic way by gradually changing the composition of the ingredients in the reaction bath until the formation of nanocomposite took place at some particular reaction parameters. These nanocomposites were then utilized for the fabrication of electrodes for aqueous symmetric supercapacitor devices utilizing gold or copper as current collectors. The device manifested a good capacitance value of 264 F/g at 1 A/g, magnificent rate performance, and capacitance retention of 84.09% at a high current density (10 A/g) when gold sheet electrodes were used as the current collectors. It also showed a capacitance retention of 79.83% and columbic efficiency of 99.83% after 2000 cycles.

Interrogation of Electrochemical Performance of Reduced Graphene Oxide/Metal‐organic Framework Hybrid for Asymmetric Supercabattery Application

“…Figure 1(a) shows the overlaid XRD patterns of rGO, MOF, MOF CSID, and rGO/MOF hybrid. The diffraction pattern of rGO is completely different from that of GO but similar to graphite [20]. After the reduction, the sharp XRD peak of GO (d-spacing 7.94 Å at 2θ = 11°,) disappeared, but a new broad diffraction peak (d-spacing 3.7 Å at 2θ = 24.01°) appeared, which is closer to the typical (002) diffraction peak of graphite (d-spacing 3.35 Å at 2θ = 26.61°, [24]).…”

“…These are carbonaceous materials which can be viewed as A graphite monolayer containing various oxygen-containing functionalities. Graphene oxide (GO) materials have semiconductor or insulator characteristics, depending on the degree of oxidation, and their electronic and optical properties can be tuned in large scope [17][18][19][20]. Their insulator properties are owing to stacked portions of sp 3 hybridized carbonoxygen bonds, which thereof lead to higher resistance [20].…”

“…Graphene oxide (GO) materials have semiconductor or insulator characteristics, depending on the degree of oxidation, and their electronic and optical properties can be tuned in large scope [17][18][19][20]. Their insulator properties are owing to stacked portions of sp 3 hybridized carbonoxygen bonds, which thereof lead to higher resistance [20]. Amongst all graphene-based materials, reduced graphene oxide (rGO) is currently one of the most explored material for electrochemical storage applications due to its excellent surface area, high electrical conductivity, chemical stability, and excellent mechanical properties [21].…”

Electrosynthesis of polyaniline‐based composite films and their electrochemical activity

“…It also has high power density, high cyclic stability, and quick charge discharge process. 11 In this perspective, it has been noticed that organic-inorganic hybrid nanocomposites have widespread applications as electrode material in solar cells, sensors, and other energy devices. [12][13][14][15] The advancement of nanocomposites could be achieved through designing suitable morphology by following a proper method of preparation.…”

“…In graphene oxide (GO), due to the presence of carbonyl and carboxyl groups, it is hydrophilic, which helps dispersion in an aqueous medium. It also has high power density, high cyclic stability, and quick charge discharge process 11 . In this perspective, it has been noticed that organic–inorganic hybrid nanocomposites have widespread applications as electrode material in solar cells, sensors, and other energy devices 12–15 .…”