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

Abstract

In the present study, Co3O4 and graphene oxide (GO) are used as reinforcement materials in a copolymer matrix of poly(aniline-co-melamine) to synthesize ternary composites. The nanocomposite was prepared by oxidative in-situ polymerization and used as an electrode material for energy storage. The SEM images revealed the vertically aligned arrays of copolymer nanofibers, which entirely wrapped the GO sheets and Co3O4 nanoparticles. The EDX and mapping analysis confirmed the elemental composition and uniform distribution in the composite. The XRD patterns unveiled composites’ phase purity and crystallinity through characteristic peaks appearing at their respective 2θ values in the XRD spectrum. The FTIR spectrums endorse the successful synthesis of composites, whereas TGA analysis revealed the higher thermal stability of composites. The cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy are employed to elucidate the electrochemical features of electrodes. The ternary composite PMCoG-2 displayed the highest specific capacity of 134.36 C/g with 6 phr of GO, whereas PMCoG-1 and PMCoG-3 exhibited the specific capacities of 100.63 and 118.4 C/g having 3 phr and 12 phr GO at a scan rate of 0.003 V/s, respectively. The best electrochemical performance of PMCoG-2 is credited to the synergistic effect of constituents of the composite material.

Chitosan/Xanthan/Hydroxyapatite-graphene oxide porous scaffold associated with mesenchymal stem cells for dentin-pulp complex regeneration

“…However, areas without apatite deposition in the CX scaffold micrograph could be observed. This specific morphology (Figure 7) after 14 days for CXHAGO 0.5%, CXHAGO 1.0% and CXHAGO 1.5% was physically similar to the structure reported in a calcium phosphate precipitation study as monetite, a new phase of calcium phosphate, 40 however XRD analysis was not performed. In addition to inorganic properties, monetite has advantages from an organic point of view.…”

“…In all groups, the apatite crystal precipitation on the scaffold surface was observed, indicating bioactivity. 40 Through the images it was possible to analyze that the HA and GO addition influences the mineral dissolution-precipitation mechanism. Therefore, it can be determined that HA and GO have a significant effect on the preferential apatite sedimentation.…”

Carbon-Quantum-Dots-Anchored Poly(aniline-co-indole) Composite Electrodes for High-Performance Supercapacitor Applications

“…The distortion detected in the CV curve of the PAPI and PAPI@CQDs composite might be due to the intermission in the diffusion of electrolyte ions to the electrode. 55 The GCD profiles of the fabricated electrodes under various current densities are revealed in Figure S4. The comparative GCD curves of the synthesized electrodes are revealed in Figure 7b.…”

“…The shape of the CV curve was distorted at a high scan rate; this is attributed to the sluggish crusade of electrolyte ions to the electrode surface at high current densities. The distortion detected in the CV curve of the PAPI and PAPI@CQDs composite might be due to the intermission in the diffusion of electrolyte ions to the electrode . The GCD profiles of the fabricated electrodes under various current densities are revealed in Figure S4.…”

Enhancing Lithium-Air Battery Performance through CoPc@CNT Composites: Electrochemical Analysis and Insights

“…To address these challenges, efficient energy storage solutions are needed [6] . Energy storage systems can capture surplus energy during times of high production and release it during periods of high demand, ensuring a more balanced and reliable energy supply [7] . By effectively storing renewable energy, we can overcome the limitations of intermittency, enhance grid stability, and promote the wider integration of renewable energy sources into our energy systems.…”