Molybdenum doped V2O5 Thin Films electrodes for Supercapacitors

Prakash, Nunna Guru; Dhananjaya, Merum; Reddy, B. S. R.; Ganesh, K. Sivajee; Narayana, A. Lakshmi; Hussain, O. M.

doi:10.1016/j.matpr.2016.11.076

Cited by 22 publications

(13 citation statements)

References 8 publications

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“…Such composites displayed discriminative electrochemical reversible capacity and better rate capability owing to hollow structured morphology that promotes shorter lithium ion pathways and easily adjusts volume alteration simultaneously. To enhance the electronic conductivity and also to enhance the faradic redox charge storage mechanism through intercalation/de‐intercalation of electrolyte ions, V 2 O 5 is separately doped with metals like manganese, nickel, copper, tantalum, molybdenum, tungsten, etc . Among the various dopant‐based electrode materials, nickel‐doped V 2 O 5 electrodes were found to demonstrate superior conductivity, excellent capacitive behavior and better electrochemical stability .…”

Section: Role Of Doped Ions/dopantsmentioning

confidence: 99%

V₂O₅ and its Carbon‐Based Nanocomposites for Supercapacitor Applications

Majumdar¹,

2019

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Vanadium pentoxide (V 2 O 5 ) is renowned among the highly efficient supercapacitor electrode-materials for high power and energy densities, excellent specific capacitance, prolonged cycle lives, variable oxidation states of V, reversible nature of interconversions, theoretical importance, etc. Various synthetic methodologies and morphologies, formation of composites, and doping for tuning properties are the additional causes of interest. Different synthetic techniques like sol-gel, solvothermal, electro-deposition, electro-spinning, atomic layer deposition, etc. are employed to prepare V 2 O 5 -based electrode materials with merits and demerits. High rate of material agglomeration and poor conductivity limit its usage in pristine morphology. Accordingly, the impact on charge storage behavior of V 2 O 5 on blending with various carbon-based systems has been explored for materials like activated carbons, conducting polymers, carbon nanotubes and functionalized graphene systems as binary/ternary composites. The aim has been to optimize the key factors such as reduced nanostructure lumping, minimal interfacial resistance and ultrafast charge diffusion across hollow porous structures which may eventually lead to the theoretically expected high specific capacitance (> 1000 F g À 1 ). In this review, we have discussed on the recent progress in the research of V 2 O 5 -based materials and highlighted on the correlation between morphology and electrochemical performances. In the course, we have attempted to delineate the advantage-disadvantages of different composite morphologies that may help to outline the present status and future aspects of these materials that the authors believe will be of first-hand assistance especially to the beginners in the field of research.

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Section: Role Of Doped Ions/dopantsmentioning

confidence: 99%

V₂O₅ and its Carbon‐Based Nanocomposites for Supercapacitor Applications

Majumdar¹,

2019

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“…However, to meet the higher requirements of future systems, we need to improve their performance by designing new materials with high energy density and power density concurrently . There are several reports available on thin film energy storage devices (batteries and capacitors) for fulfilling the energy requirements to balance both power and energy on hybrid capacitors or asymmetric capacitors in both aqueous and organic electrolytes. − In typical asymmetric supercapacitors, pseudo capacitive (Faradaic) electrode materials have been used to improve energy storage performances.…”

Section: Introductionmentioning

confidence: 99%

Robust, Flexible, and Binder Free Highly Crystalline V₂O₅ Thin Film Electrodes and Their Superior Supercapacitor Performances

Ramachandran

Jayaraman

Ragupathy

et al. 2019

ACS Sustainable Chem. Eng.

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Modern wearable technologies require highly efficient energy storage devices for improving their performance attributing a controlled shape and flexibility. Here, the present study is focused on the fabrication of a highly improved V2O5 thin film based supercapacitor. Symmetric device of V2O5||PVA-KOH||V2O5 was fabricated using thin flexible electrodes prepared by a thermal evaporation technique. The symmetric supercapacitor devices were fabricated using both annealed and as-prepared films separately, and their performance characteristics were compared. The V2O5 symmetric device having pseudocapacitive behavior delivered a maximum specific areal capacitance of 9.7 mF cm–2 at a scan rate of 10 mV s–1. The symmetric microcapacitor also showed promising performance even after being bent at 60 and 120°. This indicates the reliability of the fabricated devices for flexible electronic applications. Moreover, the symmetric capacitor showed excellent capacitance retention (95%) even after 30 000 cycles with the coulombic efficiency of 99%. Furthermore, practical feasibility of the as fabricated devices was demonstrated by lighting blue light-emitting diodes by connecting them in series. On the other hand, characteristics of the V2O5 thin films were also studied using X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, and atomic force microscopy analysis.

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“…To solve this issue, considerable strategies have been proposed, such as reducing particle size, pore engineering, and modification by doping or coating to improve their stability and electronic conductivity [30,31]. Moreover, it has been demonstrated that the mixed-valence vanadium (molybdenum) oxides can provide readily accessible redox couples, which make them attractive for reversible delithiation/lithiation and also greatly shorten the transport path lengths of lithium ions and electrons during the delithiation/lithiation processes, thus leading to a significant improvement of the electrochemical performance [32][33][34]. There are several reports on the titanium, niobium and molybdenum doped V2O5 films deposited by different techniques [35,36].…”

Section: Introductionmentioning

confidence: 99%

Mo addition for improved electrochromic properties of V2O5 thick films

Mjejri

Gaudon

Rougier

2019

Solar Energy Materials and Solar Cells

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Transition metal oxides (TMOs) have attracted considerable attention due to their variety of chromogenic properties. Among them, vanadium pentoxide (V2O5) has gained significant interest in respect of multichromism associated with orange, green and blue colors. Herein, we report a simple and easy method for the fabrication of Mo doped V2O5 thick films, leading to improved cyclability. Molybdenum doped vanadium pentoxide powders were synthesized from one single polyol route through the precipitation of an intermediate precursor: molybdenum doped vanadium ethyleneglycolate (Mo doped VEG). The as-synthesized Mo-doped V2O5 exhibits improved electrochromic performance in terms of capacity, cycling stability, and color contrast compared to single-component V2O5 in lithium as well as sodium based electrolyte. The improvement in EC performances lies in films of higher porosity as well as higher diffusion coefficients. To conclude, an electrochromic device combining Mo-V2O5 to WO3.2H2O, via a PMMA-lithium based electrolyte membrane exhibit simultaneously reversible color change from yellow to green for Mo-V2O5 and from blue to yellow white for WO3.2H2O with a cycling stability up to 10 000 cycles.

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Molybdenum doped V2O5 Thin Films electrodes for Supercapacitors

Cited by 22 publications

References 8 publications

V₂O₅ and its Carbon‐Based Nanocomposites for Supercapacitor Applications

V₂O₅ and its Carbon‐Based Nanocomposites for Supercapacitor Applications

Robust, Flexible, and Binder Free Highly Crystalline V₂O₅ Thin Film Electrodes and Their Superior Supercapacitor Performances

Mo addition for improved electrochromic properties of V2O5 thick films

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Molybdenum doped V2O5 Thin Films electrodes for Supercapacitors

Cited by 22 publications

References 8 publications

V2O5 and its Carbon‐Based Nanocomposites for Supercapacitor Applications

V2O5 and its Carbon‐Based Nanocomposites for Supercapacitor Applications

Robust, Flexible, and Binder Free Highly Crystalline V2O5 Thin Film Electrodes and Their Superior Supercapacitor Performances

Mo addition for improved electrochromic properties of V2O5 thick films

Contact Info

Product

Resources

About

V₂O₅ and its Carbon‐Based Nanocomposites for Supercapacitor Applications

V₂O₅ and its Carbon‐Based Nanocomposites for Supercapacitor Applications

Robust, Flexible, and Binder Free Highly Crystalline V₂O₅ Thin Film Electrodes and Their Superior Supercapacitor Performances