Promising electrode material of Fe3O4 nanoparticles decorated on V2O5 nanobelts for high-performance symmetric supercapacitors

Akkinepally, Bhargav; Reddy, I. Neelakanta; Lee, Cheong-Hwan; Ko, Tae Jo; Rao, P Srinivasa; Shim, Jaesool

doi:10.1016/j.ceramint.2022.10.161

Cited by 33 publications

(6 citation statements)

References 40 publications

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“…Figure 7f provides the Ragone plot, illustrating the calculated relationship between the energy and power densities of the fabricated SSCD by employing Equations ( 2) and (3). Remarkably, the MF(ht) SSC device attains an impressive peak energy density of 74.7 Wh/kg at a power density of 3780 W/kg, surpassing previously reported values for both energy and power densities [6,[48][49][50]. For an extensive comparative analysis of these parameters with those of other symmetric supercapacitor devices, please refer to Table 2.…”

Section: Supercapacitor Two-electrode Device Performance Evaluationmentioning

confidence: 74%

“…The observed separation between the cathodic and anodic peaks in the electrochemical response can be ascribed to the inherent nature of the quasi-reversible process, which arises due to electrode polarization. This phenomenon is indicative of the complex interplay between the electrochemical reactions occurring at the electrode-electrolyte interface and the associated polarization effects [6]. A comprehensive examination of the electrochemical mechanism of the synthesized materials was undertaken to further corroborate their attributes governed by diffusion-controlled kinetic characteristics.…”

Section: Supercapacitor Electrode Performance Evaluationmentioning

confidence: 94%

“…This shift has intensified the research efforts towards the development of advanced sustainable energy storage devices [3]. Supercapacitors (SCs) are among the most promising energy storage devices due to their high power density [4][5][6][7][8]. However, their low energy density presents a major challenge to their commercialization.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Supercapacitor Electrodes Based on MIL-101(Fe) Metal-Organic Framework: Evaluating Electrochemical Performance through Hydrothermal and Microwave-Assisted Synthesis

Akkinepally,

Kumar,

Reddy

et al. 2023

Crystals

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Supercapacitors have garnered substantial interest owing to their capacity to deliver power effectively for short-term applications. However, current supercapacitors suffer from limited stability and low-capacity storage. Metal-organic frameworks (MOFs) have emerged as a promising solution due to their high surface area and abundant active redox sites. MOF-based electrodes combined with aqueous based electrolytes have shown potential to enhance supercapacitor performance. While there is limited literature on MIL-101(Fe) MOF-based electrodes, a comparative study was conducted to investigate the supercapacitor performance of MIL-101(Fe) electrodes synthesized using hydrothermal and microwave-assisted processes. Processing parameters, such as the method used, alter the microstructure, morphology, and uniformity of supramolecular chemistry, impacting electrochemical characteristics. This study aimed to determine the active redox reactions, chemical stability, surface area, adsorption characteristics, and electrochemical characteristics of the electrodes. The electrodes from hydrothermal synthesis [MF(ht)] exhibited excellent electrochemical activity in comparison to the microwave-assisted [MF(m)] electrodes in the three-electrode configuration. At a high current density of 7 A/g, the MF(ht) electrode displayed a remarkable specific capacitance of 775.6 F/g and a good cyclic stability (82% @ 10 A/g) after 5000 galvanostatic charge–discharge cycles. At a current density of 1 A/g, the two-electrode configuration of MF(ht) yielded a high energy density of 74.7 Wh/kg at a power density of 2160 W/kg and a decent cyclic stability after 5000 cycles. The results suggest that the MF(ht) electrodes possess remarkable electrochemical properties that make them a promising candidate for advanced applications in energy storage.

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Section: Supercapacitor Two-electrode Device Performance Evaluationmentioning

confidence: 74%

Section: Supercapacitor Electrode Performance Evaluationmentioning

confidence: 94%

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Investigation of Supercapacitor Electrodes Based on MIL-101(Fe) Metal-Organic Framework: Evaluating Electrochemical Performance through Hydrothermal and Microwave-Assisted Synthesis

Akkinepally,

Kumar,

Reddy

et al. 2023

Crystals

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“…8(f), while the CV profile of pristine V2O5 and its NCs showed the existence of redox peaks, indicating their pseudocapacitive behavior (fig. 8(a-d) [39]. The presence of a redox peak in the cyclic voltammetry curve of V2O5 within the potential range of (0.35-0.5)V indicates reversible electrochemical reactions involving vanadium ions which were attributed to the extraction/insertion reaction of Na + ion in V2O5, the overall redox reaction can be represented as follows [40]:…”

Section: Electrochemical Studiesmentioning

confidence: 99%

Graphene-Induced Enhanced Supercapacitor Properties of V2O5-GNPs Nanocomposites for Energy Storage Devices

Oneeb,

Iqbal,

Mumtaz

et al. 2024

Preprint

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Metal oxides due to high specific capacitances are worthy for electrode material, yielding high energy and power-delivering capacities. Among them, Vanadium pentoxide (V2O5) is a very novel and economical electrode material for supercapacitors using alkaline aqueous electrolytes. In this work, V2O5 and Graphene (GNPs) nanocomposites have been synthesized to improve the conductivity, electrode porosity, and electrode surface area of V2O5. V2O5 nanorods were fabricated using a simple and flexible Sol-gel method, whereas V2O5/Graphene (GNPs) nanocomposites were prepared using an ex-situ approach. Structural analysis of nanocomposites has been performed through XRD, SEM, EDX, EDS, and FTIR. V2O5 nanorods distributed on GNPs substrates showed excellent results as an electrode material. In particular, the nanocomposites (V2O5)0.50 (GNPs)0.50 maintained 96.3% of the initial capacitance over 1350 cycles. High specific capacitance (990 F/g at 5 mV/s from CV, 800 F/g at 2 A/g from GCD), and low ohmic resistance of 0.44 Ω were achieved in 2M NaOH electrolyte. Additionally, these nanocomposites have excellent energy density (27.7 W-hr Kg− 1) at a power density of (1800 W Kg− 1) using a potential window of (0-0.5) V, which is higher than the most previously reported work on V2O5 for supercapacitor.

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“…Defect engineering can endow the active material with a new electronic environment. Hence, a feasible way is to fabricate a MnO x -based composite with multiple oxidation states and a diverse morphology, which can become a suitable approach for enhancing the specific surface area of the electrode and ensuring the maximum utilization of the active materials in MnO x -based composite, such as MnO 2 @ CoMn 2 O 4 , 12 Mn 2 O 3 /NiCo 2 O 4 , 13 PDA@MnO 2 , Mn 2 O 3 / ZnMn 2 O 3 , 14 and Nd 2 O 3 /Mn 3 O 4 . 15 Hybridizing two different manganese oxides may lead to an increased specific capacitance.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Battery-Type Supercapacitors Based on Self-Oriented Growth of Nanorods/Nanospheres Composite Assembled on Self-Standing Conductive GO/CNF Frameworks

Roy,

Rajasekhara Reddy,

Pallavolu

et al. 2024

ACS Appl. Mater. Interfaces

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Promising electrode material of Fe3O4 nanoparticles decorated on V2O5 nanobelts for high-performance symmetric supercapacitors

Cited by 33 publications

References 40 publications

Investigation of Supercapacitor Electrodes Based on MIL-101(Fe) Metal-Organic Framework: Evaluating Electrochemical Performance through Hydrothermal and Microwave-Assisted Synthesis

Investigation of Supercapacitor Electrodes Based on MIL-101(Fe) Metal-Organic Framework: Evaluating Electrochemical Performance through Hydrothermal and Microwave-Assisted Synthesis

Graphene-Induced Enhanced Supercapacitor Properties of V2O5-GNPs Nanocomposites for Energy Storage Devices

High-Performance Battery-Type Supercapacitors Based on Self-Oriented Growth of Nanorods/Nanospheres Composite Assembled on Self-Standing Conductive GO/CNF Frameworks

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