Structural, chemical and electrochemical analyses of CuxV2O5 bronzes thin films

Souza, E.A.; Lourenço, Airton; Gorenstein, A.

doi:10.1016/j.ssi.2007.01.016

Cited by 8 publications

(5 citation statements)

References 23 publications

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“…More recently, the high conductivity and increased interlayer separation in copper vanadium bronzes has led to their exploration as high-capacity cathode materials for Li-ion batteries. − Scaling copper vanadium bronzes to nanoscale dimensions offers the opportunity to further tune electronic transport, magnetic properties, and the Li-ion storage capacities and intercalation kinetics of these systems. In terms of their use as cathode materials, nanostructured copper vanadium bronzes may potentially show improved power and energy densities because of improved solid-state diffusion kinetics, better interfacial contact with the electrolyte, and the operation of Li-ion storage mechanisms not accessible for bulk materials .…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Structural Characterization, and Electronic Structure of Single-Crystalline Cu_xV₂O₅ Nanowires

et al. 2009

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Single-crystalline copper vanadium oxide nanowires beta'-Cu(x)V(2)O(5) (x approximately 0.60) have been synthesized by the hydrothermal reduction of bulk CuV(2)O(6) using small-molecule aliphatic alcohols as reducing agents. The prepared copper vanadium bronze nanowires are metallic in nature and exhibit aspect ratios as high as 300. The recent discovery of superconductivity and charge disproportionation in bulk beta'-Cu(x)V(2)O(5) has led to renewed interest in these one-dimensional metallic systems. Scaling these systems to nanoscale dimensions offers the potential for further tunability of electronic transport and Li-ion intercalation kinetics. A combination of spectroscopic and electrical measurement methods has been used to provide evidence for the metallic nature and the presence of room-temperature charge disproportionation in these nanowires.

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Section: Introductionmentioning

confidence: 99%

Synthesis, Structural Characterization, and Electronic Structure of Single-Crystalline Cu_xV₂O₅ Nanowires

et al. 2009

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“…ions, respectively; similar results have been found for other ternary vanadium oxide bronze compounds. Souza et al 2007). …”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Controlled growth of β-Na0.24V2O5 nanowire thin films

Weng

et al. 2012

J Nanopart Res

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A method to prepare well-aligned b-Na 0.24 V 2 O 5 nanowires (NWs) involves the deposition of a vanadium oxide complex onto a substrate via gaseous transport, followed by a reaction between the complex and a sodium cation (Na ? ) precursor coated on the substrate. Techniques to investigate the composition, crystallinity, and morphology of products as prepared include ICP-AES, X-ray powder diffraction (PXRD), SEM/transmission electron microscope (TEM), and XPS. PXRD patterns and images from a TEM confirm the single-crystalline nature of b-Na 0.24 V 2 O 5 NWs, which grow along direction [1 0 0]. Factors affecting the amount of deposited material and morphology were tested. On varying the reaction conditions, the length of the b-Na 0.24 V 2 O 5 wires is controlled in a range of 5-25 lm. A mechanism of formation is proposed. According to measurements of field emission, the turn-on field is 7.8 V/lm, and the maximum emission current density of 4.66 mA/cm 2 occurs at field 11 V/lm. This method is applicable to grow other tertiary metal oxide nanostructures on glass substrate.

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“…In addition, the texturing observed in all the studies available in the literature about V 2 O 5 deposition suggests that the oriented growth, mainly in the [001] direction, is characteristic of the V 2 O 5 phase when it is generated through SPT. Controlling texturization allows changing the conductive and optical properties capable of deciding the vanadium pentoxide application type. , Transparent films are required in applications such as electrochromic devices, whereas higher semiconductor conductivity can improve the performance such as in battery cathode …”

Section: Introductionmentioning

confidence: 99%

Use of Sucrose To Tune V₂O₅ Films Growth Deposited through the Spray Pyrolysis Technique

Neves

Meneses

Souza

2018

Crystal Growth & Design

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Vanadium pentoxide (V 2 O 5 ) films can be easily obtained through the spray pyrolysis technique (SPT), although they are often accompanied by other vanadium oxide phases. The V 2 O 5 phase growth is only observed at low starting solution concentrations and/or at slow deposition flows with high crystalline orientation. These conditions limit the characterization of new V 2 O 5 properties and their industrial application. Sucrose use as reagent in the precursor solution was versatile enough to produce vanadium pentoxide under high flow rates and relatively high starting salt concentrations. In addition, it efficiently randomized the texturing of SPT-deposited samples. Nanostructured and polycrystalline vanadium pentoxides were obtained at salt concentrations ranging from 100 × 10 −3 to 400 × 10 −3 mol•L −1 , at temperatures varying from 265 to 450 °C and a flow rate of 3000 mL•min −1 . Moreover, when it comes to controlling the surface texture of deposited films, one can assume that sucrose is a chelating agent capable of keeping the octahedral coordination of the vanadium complex and favoring further vanadium pentoxide formation.

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Structural, chemical and electrochemical analyses of CuxV2O5 bronzes thin films

Cited by 8 publications

References 23 publications

Synthesis, Structural Characterization, and Electronic Structure of Single-Crystalline Cu_xV₂O₅ Nanowires

Synthesis, Structural Characterization, and Electronic Structure of Single-Crystalline Cu_xV₂O₅ Nanowires

Controlled growth of β-Na0.24V2O5 nanowire thin films

Use of Sucrose To Tune V₂O₅ Films Growth Deposited through the Spray Pyrolysis Technique

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Structural, chemical and electrochemical analyses of CuxV2O5 bronzes thin films

Cited by 8 publications

References 23 publications

Synthesis, Structural Characterization, and Electronic Structure of Single-Crystalline CuxV2O5 Nanowires

Synthesis, Structural Characterization, and Electronic Structure of Single-Crystalline CuxV2O5 Nanowires

Controlled growth of β-Na0.24V2O5 nanowire thin films

Use of Sucrose To Tune V2O5 Films Growth Deposited through the Spray Pyrolysis Technique

Contact Info

Product

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Synthesis, Structural Characterization, and Electronic Structure of Single-Crystalline Cu_xV₂O₅ Nanowires

Synthesis, Structural Characterization, and Electronic Structure of Single-Crystalline Cu_xV₂O₅ Nanowires

Use of Sucrose To Tune V₂O₅ Films Growth Deposited through the Spray Pyrolysis Technique