Iron-selenide-based titanium dioxide nanocomposites as a novel electrode material for asymmetric supercapacitors operating at 2.3 V

Shah, Muhammad Zia Ullah; Hou, Hongying; Safeen, Kashif; Shah, A. F. M. Shahen

doi:10.1039/d2na00842d

Cited by 13 publications

(5 citation statements)

References 75 publications

(97 reference statements)

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“…As a result, researchers have been concentrating on electrochemical energy storage devices that are unaffected by the seasons and climate. Supercapacitors are appealing options for energy storage systems due to their fast charge-discharge features, high power density, ecological friendliness, and cheap cost [3][4][5]. However, its performance is primarily affected by the electrode's morphological and electrochemical features.…”

Section: Introductionmentioning

confidence: 99%

Copper Oxide Nanoparticles Anchored on Porous Carbon Nitride Nanosheets for Supercapacitor Applications

Merum,

Pitcheri,

Roy

et al. 2024

International Journal of Energy Research

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Electrochemical energy storage devices are vital for renewable energy integration and the deployment of electric vehicles. Ongoing research seeks to create new materials with innovative morphologies capable of delivering high specific capacitance for the next generation of customizable energy devices. Carbon nitride is an excellent candidate for electrochemical energy storage devices; however, it has limitations such as layer stacking, poor electric conductivity, a restricted number of electroactive sites, and static electrochemical reaction rates. This research objective is to make porous structures in carbon nitride nanosheets and integrate them with CuO particles to increase surface area and improve electrochemical performance. The use of thermal heating, acidic treatment, and hydrothermal processes accomplishes this. Along with X-ray diffraction peaks of the CuO phase, a prominent peak (002) at 27.67° indicates the presence of graphitic-structured carbon nitride. TEM images show that CuO particles are evenly attached to the surface of g-C3N4 nanosheets with lattice intervals of 0.336 and 0.232 nm, which are the (002) and (111) orientations of the g-C3N4 and CuO phases, respectively. Adding CuO nanoparticles to porous g-C3N4 nanosheets avoids layer stacking and provides micro- and mesopore channels, increasing the specific surface area (42.60 m2 g-1). The CuO@ porous g-C3N4 electrode delivered 817 F g-1 of specific capacitance at 1 A g-1 and admirable capacitance retention (92.3% after 6000 cycles) due to the synergistic impact of its unique composition and structural characteristics. Because of its outstanding electrochemical performance and fascinating discoveries, CuO@ porous g-C3N4 may be employed as a cathode material for high-performance supercapacitors.

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Section: Introductionmentioning

confidence: 99%

Copper Oxide Nanoparticles Anchored on Porous Carbon Nitride Nanosheets for Supercapacitor Applications

Merum,

Pitcheri,

Roy

et al. 2024

International Journal of Energy Research

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“…These materials have recently become significant energy storage devices due to quick charging/discharging, strong power, and good cycle stability . Moreover, discovering innovative nanoscale electrode materials and better device manufacturing processes have significantly boosted their energy densities . For these reasons, high-power applications often employ a combination of supercapacitor and battery or fuel-cell technology …”

Section: Introductionmentioning

confidence: 99%

“… 2 Moreover, discovering innovative nanoscale electrode materials and better device manufacturing processes have significantly boosted their energy densities. 3 For these reasons, high-power applications often employ a combination of supercapacitor and battery or fuel-cell technology. 4 …”

Section: Introductionmentioning

confidence: 99%

Fabrication of Asymmetric Supercapacitors (AC@GQDs//AC) with High Electrochemical Performance Utilizing Activated Carbon and Graphene Quantum Dots

AlSalem,

Katubi,

Binkadem

et al. 2023

ACS Omega

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Sugar cane bagasse stands as a prevalent and abundant form of solid agricultural waste, making it a prime candidate for innovative utilization. Harnessing its potential, we embarked on a groundbreaking endeavor to evaluate the sustainability of a molasses-based hydrothermal process to produce graphene quantum dots (GQDs). This pioneering initiative promises remarkable environmental benefits and holds immense economic potential. Embedding crystalline GQDs in activated carbon (AC) boost electrochemical efficiency by enhancing charge-transfer and ion migration kinetics. Optical, structural, and morphological evaluations were used to confirm the formation of GQDs. Transmission electron microscopy (TEM) investigation showed the size, shape, and fact that GQDs were monodispersed, and X-ray diffraction and Fourier transform infrared determined the structure of GQDs. The electrodes with negative (AC) and positive (AC@GQDs) polarity demonstrate a considerable specific capacitance of 220 and 265 F g–1, respectively, when measured at 0.5 A g–1. Additionally, these electrodes exhibit high-rate capabilities of 165 and 230 F g–1 when measured at 5 A g–1, as determined by galvanostatic charge–discharge techniques. The supercapacitor device comprising asymmetric AC//AC@GQDs exhibits a specific capacitance of 118 F g–1. Furthermore, the asymmetric device exhibits exceptional cycling behavior, with an impressive 92% capacitance retention even after undergoing 10,000 cycles. This remarkable performance underscores the immense potential of both the negative and positive electrodes for real-world supercapacitor applications. Such findings pave the way for promising advancements in the field and offer exciting prospects for practical utilization.

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“…These thin films exhibit unique physical and electronic properties that make them highly desirable for numerous applications. [ 1–3 ] One of the key areas where iron selenide thin films are extensively studied is in the field of superconductivity. Iron selenide has been found to exhibit high‐temperature superconductivity, which is of great interest for developing efficient and practical superconducting materials for energy transmission and storage applications.…”

Section: Introductionmentioning

confidence: 99%

Iron Selenide Nanowire Bundles for Microwave Communication Technology

Qasrawi,

Toubasi

2023

Physica Status Solidi (a)

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Herein stacked layers of FeSe2 deposited onto ytterbium substrates using the thermal evaporation technique under a vacuum pressure of 10‐5 mbar are observed to form nanowire bundles (NB). Structural investigations on these NBs have shown the preferred growth of orthorhombic FeSe2 in addition to hexagonal ytterbium selenide as a minor phase in the structure of FeSe2. Impedance spectroscopy analyses conducted in the frequency domain of 0.01‐1.80 GHz shown that FeSe2 stacks can exhibit a negative capacitance effect and band stop filter characteristics. For these band stop filters, the refection coefficient (S11), the voltage standing wave ratios (VSWR) and the return loss (Lr) spectra displayed optimum values at a notch frequency of 0.87 GHz. In addition, computational analysis using Lorentz Oscillator (LO) Model has shown that the negativity of the capacitance is dominated by two oscillators centered at 0.08 GHz and 1.25 GHz. On the other hand, the insertion of aluminum nanosheets between the stacked layers of FeSe2 has been observed to decrease the negativity of the capacitance, increase the values of S11 and Lr and bring the VSWR closer to ideality. FeSe2 nanowire bundles resulting from FeSe2 stacks comprising Al nanosheets are considered suitable for microwave communication technology.This article is protected by copyright. All rights reserved.

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Iron-selenide-based titanium dioxide nanocomposites as a novel electrode material for asymmetric supercapacitors operating at 2.3 V

Abstract: This study portrays a facile wet-chemical synthesis of FeSe2/TiO2 nanocomposites for the first time for advanced asymmetric supercapacitor (SC) energy storage applications.

Cited by 13 publications

References 75 publications

Copper Oxide Nanoparticles Anchored on Porous Carbon Nitride Nanosheets for Supercapacitor Applications

Copper Oxide Nanoparticles Anchored on Porous Carbon Nitride Nanosheets for Supercapacitor Applications

Fabrication of Asymmetric Supercapacitors (AC@GQDs//AC) with High Electrochemical Performance Utilizing Activated Carbon and Graphene Quantum Dots

Iron Selenide Nanowire Bundles for Microwave Communication Technology

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