Graphene oxide‐wrapped polyaniline nanorods for supercapacitor applications

Abstract

This study depicts the chemical synthesis and supercapacitive behavior of nanocomposites of Polyaniline nanorods wrap with graphene oxide (PANI/GO). Synthesis of PANI/GO nanocomposites was carried out by in situ oxidative solution polymerization of aniline in the presence of Nitric acid, acting as a proton donor. The nanocomposites were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy, X‐ray diffraction, Raman spectroscopy, thermal gravimetric analysis, contact angle analysis, cyclic voltammetry, galvanostatic charge–discharge test and electrochemical impedance spectroscopy. FESEM revealed the formation of PANI nanorods with the aspect ratio in the range of 3–5, while TEM revealed the wrapping of GO sheets on the PANI nanorods. Thermal stability showed decreasing trend while surface hydrophobicity was of increasing trend with GO concentration due to partial reduction of GO, as observed in Raman spectra. PANI/10 wt% GO (PANI/GO10) nanocomposite electrode showed highest specific capacitance of 276 F/g as compared with 180 F/g of Pure PANI. Cyclic stability of 80% was retained for PANI/GO10 nanocomposites after 500 cycles at a current density of 0.5A/g as compared with unstable PANI. The enhanced specific capacitance and good cyclic stability with increasing GO concentration revealed the good potential of PANI/GO nanocomposites for supercapacitor applications. POLYM. COMPOS., 40:E1716–E1724, 2019. © 2019 Society of Plastics Engineers

An overview on the recent developments in polyaniline‐based supercapacitors

“…Bharadiya et al had studied the electrochemical properties of GO‐wrapped PAni composites (Figure ). They observed that the wrapping of monolayer (1) and multilayer (2 to 10) of GO sheets on PAni nanorods led to an increase in the d ‐spacing of the GO sheets from 12.76 Å for PAni/GO1 to 13.46 Å for PAni/GO10.…”

“…A schematic diagram depicting the preparation of graphene oxide (GO)–wrapped polyaniline (PAni) nanorods . Reproduced with permission from Wiley…”

Environment‐friendly electrodes using biopolymer chitosan/poly ortho aminophenol with enhanced electrochemical behavior for use in energy storage devices

“…Attraction to supercapacitors (SCs) has been developed as a reliable energy storage device due to fast charge/discharge features, outstanding cycle stability, and grand‐power density. And also, many investigations have been done to overcome low‐energy density drawbacks through the designing and application of efficient electrode materials where fabricated in SCs to develop more durable and appropriate electrochemical performances . Physicochemical properties of the electrode such as their size, shape, porosity, and surface charge influenced the performance of electrode and are important for their applications.…”

“…And also, many investigations have been done to overcome low-energy density drawbacks through the designing and application of efficient electrode materials where fabricated in SCs to develop more durable and appropriate electrochemical performances. [1][2][3][4][5][6][7][8][9][10][11][12][13] Physicochemical properties of the electrode such as their size, shape, porosity, and surface charge influenced the performance of electrode and are important for their applications. To develop the performance of SC devices, many researches have been accomplished to employ conductive polymers, [14][15][16][17] metal and metal oxides, [18][19][20][21][22][23][24][25][26] and carbonaceous materials.…”

Enhanced interfacial adhesion in glass fiber fabric/epoxy composites employing fiber surface treatment with aminosilane-functionalized graphene oxide

“…on the surface of GO sheets endow them with good dispersity in polymer composites. [15][16][17][18][19][20] Also, to further facilitate the chemical cross-linking with the matrix, some active organics (e.g., silane coupling agents) are commonly used for the functionalization of GO. [21][22][23] Recently, the deposition of GO on the fiber surface for creating a hierarchical structure has attracted great interest.…”