Impact of hybridization on specific capacitance in hybrid NiO/V2O5@graphene composites as advanced supercapacitor electrode materials

Konda, Shireesha; Chidurala, Shilpa Chakra

doi:10.1016/j.apsadv.2022.100329

Cited by 16 publications

(3 citation statements)

References 56 publications

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“…[5] As an electrode material, vanadium pentoxide (V 2 O 5 ) has a high theoretical speci c capacitance value of 2120F/g. [7] Experimentally, the speci c capacitance of V 2 O 5 is mainly related to the nature of the electrolyte used. In general, there are three electrolytes used in electrochemical supercapacitors: aqueous electrolyte, organic electrolyte, and ionic liquid.…”

Section: Introductionmentioning

confidence: 99%

Effect of Manganese and Zinc co-dopants on electrochemical properties of vanadium oxide (V2O5) based electrode: application for supercapacitor

Ghannam,

Rossi,

Haloui

et al. 2024

Preprint

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Vanadium oxides have been investigated for their potential use in electrochemical supercapacitors due to their variable oxidation states yielding surface redox. However, its electrochemical performance is limited by its poor electronic and ionic conductivity. In an attempt to improve the electronic conductance and electrochemical performance of V2O5, (Mn, Zn) co-doped V2O5 is investigated. (Mn, Zn) (2, 2) wt% co-doped V2O5 provides the high specific capacitance, it achieves 23.72F/g at a scan rate of 5mV/s, and it is characterized by very low charge transfer resistance (301mΩ). At 2A/g current density, its power density and energy density are about 2520Wkg− 1, and 4.85Whkg− 1respectively. Because of its good electrochemical performance, (Mn, Zn) (2, 2) wt% co-doped V2O5 has great application prospects in supercapacitors.

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Section: Introductionmentioning

confidence: 99%

Effect of Manganese and Zinc co-dopants on electrochemical properties of vanadium oxide (V2O5) based electrode: application for supercapacitor

Ghannam,

Rossi,

Haloui

et al. 2024

Preprint

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“…RuO2 has the highest specific capacitance [14], but it is very costly and rare which limits its application as electrode material for supercapacitors. Vanadium oxides have received continuous attention as a potential candidate for electrode material due to their high theoretical specific capacitance (2120 F/g) [15], diverse oxidation valence states (2 + -5 + ), low cost, and layered structure [16]. Vanadium can create a variety of compounds with oxygen atoms, including VO2, V2O3, and V2O5 [17][18], Among them, V2O5 is more stable than the other vanadium oxides and is essential in the field of energy storage devices [19].…”

Section: Introductionmentioning

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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“…V 2 O 5 /NiO heterojunctions have been used as anode-selective contact in inverted polymer solar cells [36] for improved stability of the device. It also has potential applications in supercapacitor as electrodes [37]. The electrical properties of transparent V 2 O 5 /NiO heterojunctions have not been widely studied.…”

Section: Introductionmentioning

confidence: 99%

Structural, optical properties of V₂O₅ and NiO thin films and fabrication of V₂O₅/NiO heterojunction

Kishor,

Ruksana,

Amisha

et al. 2023

Phys. Scr.

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The exceptional stability of metal oxide heterojunctions makes them worthy of the future. Here we report V2O5/NiO heterojunction device fabricated utilizing both physical and chemical deposition techniques. Orthorhombic V2O5 thin films were grown by thermal evaporation technique using the V2O5 nanostructures synthesized via the reverse micelle method. Nickel oxide (NiO) thin films were deposited using the solution-processed spin coating technique. The structural, optical and morphological properties of the V2O5 and NiO thin films were studied in detail. Highly transparent V2O5/NiO heterojunction was fabricated on FTO coated glass substrate with a device geometry of FTO/NiO/V2O¬5/Ag. The electrical properties were studied and the J-V curve shows a rectifying nature with a rectification ratio of 12 at a bias voltage of 0.7 V and a knee voltage of 0.58 V. The variation of the ideality factor is studied in different linear regions of the ln (J)- V curve. From the C-V characteristics of the device, a built-in potential of 0.54 V was obtained.

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Impact of hybridization on specific capacitance in hybrid NiO/V2O5@graphene composites as advanced supercapacitor electrode materials

Cited by 16 publications

References 56 publications

Effect of Manganese and Zinc co-dopants on electrochemical properties of vanadium oxide (V2O5) based electrode: application for supercapacitor

Effect of Manganese and Zinc co-dopants on electrochemical properties of vanadium oxide (V2O5) based electrode: application for supercapacitor

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

Structural, optical properties of V₂O₅ and NiO thin films and fabrication of V₂O₅/NiO heterojunction

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Impact of hybridization on specific capacitance in hybrid NiO/V2O5@graphene composites as advanced supercapacitor electrode materials

Cited by 16 publications

References 56 publications

Effect of Manganese and Zinc co-dopants on electrochemical properties of vanadium oxide (V2O5) based electrode: application for supercapacitor

Effect of Manganese and Zinc co-dopants on electrochemical properties of vanadium oxide (V2O5) based electrode: application for supercapacitor

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

Structural, optical properties of V2O5 and NiO thin films and fabrication of V2O5/NiO heterojunction

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Structural, optical properties of V₂O₅ and NiO thin films and fabrication of V₂O₅/NiO heterojunction