Basic and acidic electrolyte mediums impact on MnO2-Mn2O3/Poly-2-methylaniline hexagonal nanocomposite pseudo-supercapacitor

The incorporation of poly-2-aminobenzene thiol (P2ABT) onto 2D G-C3N4 sheets results in the formation of a P2ABT/G-C3N4 nanocomposite, exhibiting favorable morphological and electrical properties that position it as a promising candidate for a paste utilized in a two-symmetric electrode hydride supercapacitor. The decoration process involves the oxidation of 2-aminobenzene thiol with K2S2O8, leading to the polymer coating of the embedded 2D G-C3N4 materials, yielding a robust composite. Analysis via scanning electron microscopy (SEM) unveils the formation of 2D sheets of G-C3N4 with an average length, width, and thickness of 750 nm, 200 nm, and 15 nm, correspondingly. The composite establishes a sturdy network with a porous structure, indicative of the synergistic combination of the electrical characteristics of the polymer and G-C3N4.In the construction of the two-symmetric electrode supercapacitor, an impressive specific capacitance (CS) of 310 F/g is achieved at 0.2 A/g. The supercapacitor exhibits a promising energy density (E) of 26.8 W h kg-1 and maintains retention stability even after undergoing 1000 charge/discharge cycles. Notably, the retention rate remains high at 98 % after 250 cycles and 96 % after an extended cycling period of 1000 cycles. This exceptional performance positions the supercapacitor as a prospective candidate for applications in industrial settings and within batteries. Its advantages lie in its ease of fabrication, mass production capabilities, and cost-effective manufacturing techniques, opening new avenues for these materials in energy storage fields.

Section: Declarations Ethical Approvalmentioning

confidence: 99%

A two-symmetric electrode hydride supercapacitor developed from G-C₃N₄ decorated with poly-2-aminobenzenethiol

Ben Gouider Trabelsi,

Rabia,

Alkallas

et al. 2024

Core-shell NiS-poly-2-aminothiophenol/NiO nanocomposite of ring-shape for supercapacitor applications

Rabia,

Esayed,

Alkallas

et al. 2024

A novel ring-shaped NiS-poly-2-aminothiophenol NiO (NiS-P2ATP/NiO) core-shell nanocomposite has been successfully synthesized and extensively analyzed, presenting itself as a promising material for a two-electrode configuration pseudo-supercapacitor, tested in both basic and acidic mediums. The SEM analysis reveals the construction of open-ring shapes, characterized by a wall thickness of approximately 120 nm and a height of around 100 nm. To confirm the elements and crystallinity behavior of this nanocomposite, XPS and XRD analyses are used, while FTIR is performed to confirm the functional groups. The electrical properties of this nanocomposite were thoroughly investigated through various techniques, including charge/discharge, cyclic voltammetry, and EIS. The efficiency of the fabricated supercapacitor was assessed through measured specific capacitance (CS), energy density (E), power density (P), Ragone plot, and the values of RS and RCT resistances. The specific capacitance value is significantly higher at 59.8 F/g compared to the basic medium's CS value of 30 F/g. In the acidic medium, the E values reached 5.0 W h kg-1, while in the basic electrolyte, it amounted to 2.5 W h kg-1. The produced P achieved impressive values, reaching 28800 and 28700 W/kg at 0.2 A/g in the acidic and basic mediums, correspondingly. The unique behavior of this novel composite suggests its potential for industrial applications of polymer materials, given its ease of preparation, mass production feasibility, and cost-effectiveness. The findings of this study open doors for the practical implementation of such innovative materials in energy storage technologies.

Symmetric two-electodes pseudosupercapacitor from trichalcogenide MoS₃-MoO₃-poly-O-amino-benzenethiol nanocomposite

Rabia,

Ben Gouider Trabelsi,

Alkallas

et al. 2024

A novel nanocomposite, MoS3-MoO3/poly-O-amino-benzenethiol (MoS3-MoO3/POABT), has been synthesized in a one-pot process and demonstrates promising applications as a material for a two-electrode configuration supercapacitor. This nanocomposite exhibits remarkable morphological characteristics, featuring uniform particles with an average diameter of 80 nm and a porous structure. The advantageous morphology contributes to the enhanced performance of the fabricated pseudo supercapacitor.The evaluation of the charge/discharge behavior and cyclic voltammetry curves pertaining to the redox reaction of the MoS3-MoO3/POABT nanocomposite reveals its efficacy as a supercapacitor material. The specific capacitance (CS) achieved for this fabricated supercapacitor is noteworthy at 152 F/g. Furthermore, the energy density (E) peaks at 12.6 W h kg-1 when operating at a current density of 0.2 A/g. This high energy density demonstrates the supercapacitor's ability to store significant energy for practical use efficiently. Importantly, its stability remains strong, with an impressive 98% retention after 250 cycles, and even after 1000 cycles, it only slightly decreases to 95%. This remarkable stability over extended cycling periods underscores the durability of the materials in the supercapacitor. Such reliable performance establishes the MoS3-MoO3/POABT nanocomposite as a dependable choice for supercapacitor applications, ensuring longevity and consistent performance in diverse energy storage needs.