Effective pseudocapacitive performance of binder free transparent α-V2O5 thin film electrode: Electrochemical and some surface probing

Adewinbi, Saheed A.; Busari, Rafiu A.; Animasahun, Lukman O.; Omotoso, Ezekiel; Taleatu, Bidini A.

doi:10.1016/j.physb.2021.413260

Cited by 15 publications

(5 citation statements)

References 23 publications

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“…To expose the relationship between energy density and power density, the Ragone plots are diagramed in Figure 5e and Table S2. The V 3 O 7 SSC can yield a maximum energy density of 0.13 mWh/cm 2 at a power density of 0.42 mW/cm 2 , and retain a maximum power density of 2.55 mW/cm 2 at an energy density of 0.02 mWh/cm 2 , which precedes those of previous research about vanadium oxide-based supercapacitors, such as α-V 2 O 5 SSC (0.48 µWh/cm 2 at 0.11 mW/cm 2 ) [38], V 2 O 5 /FTO SSC (7.70 µWh/cm 2 at 0.36 mW/cm 2 ) [39], double-layer VO 2 SSC (0.80 µWh/cm 2 at 0.02 mW/cm 2 ) [40], V 2 O 5 •H 2 O/graphene SSC (1.13 µWh/cm 2 at 0.01 mW/cm 2 ) [41], V 2 O 5 @PEDOT/graphene SSC (0.18 µWh/cm 2 at 0.01 mW/cm 2 ) [42], and MXene-TiS 2 //MWCNTs-VO 2 ASC (32.50 µWh/cm 2 at 1.20 mW/cm 2 ) [43]. Additionally, the cycling property is evaluated at a current density of 3.0 mA/cm 2 .…”

Section: Characterization Of the V 3 O 7 Sscsupporting

confidence: 77%

Flexible High-Performance and Screen-Printed Symmetric Supercapacitor Using Hierarchical Rodlike V3O7 Inks

et al. 2023

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The emergence of the Internet of things stimulates the pursuit of flexible and miniaturized supercapacitors. As an advanced technology, screen printing displays vigor and tremendous potential in fabricating supercapacitors, but the adoption of high-performance ink is a great challenge. Here, hierarchical V3O7 with rodlike texture was prepared via a facile template–solvothermal route; and the morphology, component, and valence bond information are characterized meticulously. Then, the screen-printed inks composed of V3O7, acetylene black, and PVDF are formulated, and the rheological behaviors are studied detailedly. Benefitting from the orderly aligned ink, the optimal screen-printed electrode can exhibit an excellent specific capacitance of 274.5 F/g at 0.3 A/g and capacitance retention of 81.9% after 5000 cycles. In addition, a flexible V3O7 symmetrical supercapacitor (SSC) is screen-printed and assembled on the Ag current collector, exhibiting a decent areal specific capacitance of 322.5 mF/cm2 at 0.5 mA/cm2, outstanding cycling stability of 90.8% even after 5000 cycles, satisfactory maximum energy density of 129.45 μWh/cm2 at a power density of 0.42 mW/cm2, and remarkable flexibility and durability. Furthermore, a single SSC enables the showing of an actual voltage of 1.70 V after charging, and no obvious self-discharge phenomenon is found, revealing the great applied value in supply power. Therefore, this work provides a facile and low-cost reference of screen-printed ink for large-scale fabrication of flexible supercapacitors.

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Section: Characterization Of the V 3 O 7 Sscsupporting

confidence: 77%

Flexible High-Performance and Screen-Printed Symmetric Supercapacitor Using Hierarchical Rodlike V3O7 Inks

et al. 2023

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“…From the definition, it shows that the deviation of texture coefficient from unity signifies the growth's preferred orientation. The Debye-Scherer's equation was used to evaluate the crystallite size (D) of the samples [14].…”

Section: Structural Analysismentioning

confidence: 99%

“…The micro-strain and dislocation density of the deposited films were also calculated from the following relations [14]:…”

Section: Structural Analysismentioning

confidence: 99%

Tuning the optical properties and some surface structure of Cd-O thin film electrodeposited by two-electrode: An effect of Cobalt incorporation

Busari

Omotoso

Animasahun

et al. 2023

J. Nig. Soc. Phys. Sci.

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The tuning of optical and dielectric parameters, structural and microstructural properties of CdO synthesized via a solution growth two-electrode cell arrangement under ambient environment, with the incorporation of Co ion into its matrix was investigated. The energy band gaps of the films was estimated in the range of 1.69 eV</=Eg</= 1.96 eV. The extinction coefficient, k for all the samples decreases as the incident photon energy increases. The films exhibit considerably high optical conduction across the photon energy with estimated power of 1013 (Omega m)-1. The elemental composition of the samples was determined using the energy dispersive x-ray spectrometry technique. The micrograph images from scanning electron microscopy technique shown that the films are polycrystalline and well-adhered to the substrates with their crystal grains evenly dispersed across the substrates’ surface. The x-ray diffraction analysis confirmed that the deposited films are of polycrystalline in nature. The films show preference for orientation along the (111) plane.

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“…Also, vanadium pentoxide (V 2 O 5 ) is considered to be one of the most stable forms of vanadium oxide among various oxidation states, i.e., V 2+ , V 3+ , V 4+ , and V 5+ . It exists in different phases, such as, α, β, γ, and δ-V 2 O 5 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photoelectrochemical Response of the ZnO/V₂O₅ Heterojunction Via Improved Visible-Light Absorption and Charge Carrier Separation

Malhotra

Kaur

Ghosh

et al. 2023

ACS Appl. Energy Mater.

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Planar ZnO/V 2 O 5 heterojunctions show excellent photocurrent density and are easy to prepare using a simple physical vapor deposition technique. First, ZnO thin-film photo-electrodes were prepared by radio frequency sputtering, and then their thickness was optimized for improved photoelectrochemical (PEC) response, resulting in an optimum photocurrent density value of ∼0.7 mA/cm 2 at 0.61 V vs Ag/AgCl for ZnO thin films deposited for 15 min. Thereafter, ZnO/V 2 O 5 heterojunctions were fabricated by depositing V 2 O 5 thin films for different deposition durations of 10, 20, and 30 min onto ZnO thin-film samples which were already optimized to further improve the PEC performance. The structural, optical, and morphological properties of pristine and heterojunction thin-film samples were investigated by X-ray diffraction, Raman spectroscopy, UV−visible spectroscopy, field-emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy techniques. The maximum photocurrent density value of 1.56 mA/cm 2 at 0.61 V vs Ag/AgCl was obtained for ZnO/V 2 O 5 heterojunction photoanodes, where the top V 2 O 5 layer was deposited by RF magnetron sputtering process which occurred for 20 min. The ZnO/ V 2 O 5 heterojunction photocurrent density was nearly twice as compared with that of the pristine ZnO photo-electrode. This improved PEC response of the ZnO/V 2 O 5 heterojunction was due to enhanced visible-light absorption and the formation of a staggered n−n heterojunction, which facilitated the separation of electron−hole pairs at the photo-anode/electrolyte junction.

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Effective pseudocapacitive performance of binder free transparent α-V2O5 thin film electrode: Electrochemical and some surface probing

Cited by 15 publications

References 23 publications

Flexible High-Performance and Screen-Printed Symmetric Supercapacitor Using Hierarchical Rodlike V3O7 Inks

Flexible High-Performance and Screen-Printed Symmetric Supercapacitor Using Hierarchical Rodlike V3O7 Inks

Tuning the optical properties and some surface structure of Cd-O thin film electrodeposited by two-electrode: An effect of Cobalt incorporation

Enhanced Photoelectrochemical Response of the ZnO/V₂O₅ Heterojunction Via Improved Visible-Light Absorption and Charge Carrier Separation

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Effective pseudocapacitive performance of binder free transparent α-V2O5 thin film electrode: Electrochemical and some surface probing

Cited by 15 publications

References 23 publications

Flexible High-Performance and Screen-Printed Symmetric Supercapacitor Using Hierarchical Rodlike V3O7 Inks

Flexible High-Performance and Screen-Printed Symmetric Supercapacitor Using Hierarchical Rodlike V3O7 Inks

Tuning the optical properties and some surface structure of Cd-O thin film electrodeposited by two-electrode: An effect of Cobalt incorporation

Enhanced Photoelectrochemical Response of the ZnO/V2O5 Heterojunction Via Improved Visible-Light Absorption and Charge Carrier Separation

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Enhanced Photoelectrochemical Response of the ZnO/V₂O₅ Heterojunction Via Improved Visible-Light Absorption and Charge Carrier Separation