Two-dimensional heterostructures of V<sub>2</sub>O<sub>5</sub> and reduced graphene oxide as electrodes for high energy density asymmetric supercapacitors

Nagaraju, D. H.; Wang, Qingxiao; Beaujuge, Pierre M.; Alshareef, Husam N.

doi:10.1039/c4ta03731f

Cited by 202 publications

(80 citation statements)

References 50 publications

(37 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3][4] Among layered oxides, vanadium oxide is one of the most extensively studied binary oxides due to its rich variety of vanadium/oxygen stoichiometries and characteristic properties of the individual phases (such as V 2 O 5 , VO 2 , V 2 O 3 , V 6 O 13 etc.). This has resulted in many studies targeting the use of vanadium oxide in various applications such as energy storage, 5,6 catalysis, 7 electrochromism, 8 sensing, 9 and spintronic devices. 10 In contrast, VO x thin films have also been reported recently for resistive switching performance by several groups.…”

mentioning

confidence: 99%

Electroforming free resistive switching memory in two-dimensional VOx nanosheets

Hota

Nagaraju

Hedhili

et al. 2015

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

We report two-dimensional VOx nanosheets containing multi-oxidation states (V5+, V4+, and V3+), prepared by a hydrothermal process for potential applications in resistive switching devices. The experimental results demonstrate a highly reproducible, electroforming-free, low SET bias bipolar resistive switching memory performance with endurance for more than 100 cycles maintaining OFF/ON ratio of ∼60 times. These devices show better memory performance as compared to previously reported VOx thin film based devices. The memory mechanism in VOx is proposed to be originated from the migration of oxygen vacancies/ions, an influence of the bottom electrode and existence of multi-oxidation states.

show abstract

mentioning

confidence: 99%

Electroforming free resistive switching memory in two-dimensional VOx nanosheets

Hota

Nagaraju

Hedhili

et al. 2015

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…After carrying out hydrothermal treatment to wrap GO on V 2 O 5 resistance increased to 10 5 . On the other hand it was observed that after heat treatment, when GO was reduced to RGO, resistance drops by three orders of magnitude coming down to 10 2 [33,34]. The results of Cole-Cole-fit are reported in Table 1.…”

Section: Impedance Analysismentioning

confidence: 83%

Reduced graphene oxide wrapped V2O5 nanoparticles: green synthesis and electrical properties

Bhaskaram

Cheruku

Govindaraj

2016

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

In this study, Vanadium pentoxide (V 2 O 5 ) -graphene composite (VRGO) is prepared by simple hydrothermal treatment. V 2 O 5 nanoparticles are prepared by solvothermal method using environmentally benign precursor, vanadium oxide acetyl acetonate. Graphene oxide (GO) prepared by modified Hummer's method is the origin for graphene in prepared composite. GO is wrapped onto V 2 O 5 nanoparticles then subsequently reduced to graphene using simple heat treatment, thus avoiding the use of harmful reducing agents. This composite is characterized by X-ray diffraction for the structural analysis, scanning electron microscopy to identify the morphology, confocal Raman microscopy and Fourier transform infrared spectroscopy for molecular structure and chemical bonds present in the composite. The BET surface area analyzer is used for surface area analysis and impedance analyzer for electrical studies. Impedance analysis carried out at room temperature shows a considerable decrease in the resistance of prepared composite VRGO, in comparison to bare V 2 O 5 thus providing a good conductivity for the sample.

show abstract

“…[204] As discussed by the nanostructured LiCoO 2 , some of the 2D transition metal oxides or hydroxide nanosheets such as V 2 O 5 , VOPO 4 , NiO, TiO 2 (B), Co 3 O 4 , and nickel and cobalt hydroxide can show extrinsic intercalation pseudocapacitance driven by the fast intercalation through the tunnels or layers with the low activation energy for ion insertion. [206,207] Nagaraju et al [206] have reported the 2D layered heterostructured V 2 O 5 nanosheets/graphene composites with high Faradaic activity and applied as an asymmetric supercapacitor devices in an aqueous electrolyte (Figure 20a). [205] In a bulk orthorhombic phase, V 2 O 5 showed typical battery behavior of several voltage plateau profile.…”

Section: Transition Metal Oxide and Hydroxidesmentioning

confidence: 99%

Emergent Pseudocapacitance of 2D Nanomaterials

Yun

Yeon

et al. 2018

Advanced Energy Materials

247

190

View full text Add to dashboard Cite

naming of energy storage devices after their own core materials: conventional batteries such as lead-acid batteries, which are named after the lead-based active material and the acidic electrolyte; nickelcadmium batteries named after the nickeland cadmium-based active materials; nickel-metal hybrid batteries named after the nickel-and metal hydride-based active materials; state-of-the-art lithium-ion batteries (LIBs), named after the lithiated host materials and lithium-ion carriers; and next-generation batteries such as sodiumion, lithium-sulfur, and lithium-air batteries, which are named after the lithium metal anode and sulfur or O 2 cathode. [4][5][6][7][8][9] In short, whenever energy storage materials made a breakthrough, new-generation energy storage devices appeared. Among electrochemical energy storage devices, supercapacitors (SCs), which can store charges at the surface, have advantages over LIB and conventional batteries in terms of high power, fast charging/ discharging rates, and long cyclability, as will be discussed in Section 2.1. However, the low energy density of SCs remains a critical challenge for emerging applications such as next-generation electronic systems, electrical vehicles (EVs), and renewable energy storage systems (ESSs). [10,11] Based on the long history of energy storage research, new and emerging materials are expected to provide solutions to this problem.Returning to the chronological development of SCs, SCs have been revolutionized by the emergence of new materials, as Two dimensional (2D) nanomaterials are very attractive due to their unique structural and surface features for energy storage applications. Motivated by the recent pioneering works demonstrating "the emergent pseudocapacitance of 2D nanomaterials," the energy storage and nanoscience communities could revisit bulk layered materials though state-of-the-art nanotechnology such as nanostructuring, nanoarchitecturing, and compositional control. However, no review has focused on the fundamentals, recent progress, and outlook on this new mechanism of 2D nanomaterials yet. In this study, the key aspects of emergent pseudocapacitors based on 2D nanomaterials are comprehensively reviewed, which covers the history, classification, thermodynamic and kinetic aspects, electrochemical characteristics, and design guidelines of materials for extrinsically surface redox and intercalation pseudocapacitors. The structural and compositional controls of graphene and other carbon nanosheets, transition metal oxides and hydroxides, transition metal dichalcogenides, and metal carbide/nitride on both microscopic and macroscopic levels will be particularly addressed, emphasizing the important results published since 2010. Finally, perspectives on the current impediments and future directions of this field are offered. Unlimited combinations and modifications of 2D nanomaterials can provide a rational strategy to overcome intrinsic limitations of existing materials, offering a new-generation energy storage materials toward a high and new p...

show abstract

Two-dimensional heterostructures of V₂O₅ and reduced graphene oxide as electrodes for high energy density asymmetric supercapacitors

Abstract: The 2D layered heterostructures of V2O5 nanosheets and reduced graphene oxide show high conductivity and superior asymmetric supercapacitor properties.

Cited by 202 publications

References 50 publications

Electroforming free resistive switching memory in two-dimensional VOx nanosheets

Electroforming free resistive switching memory in two-dimensional VOx nanosheets

Reduced graphene oxide wrapped V2O5 nanoparticles: green synthesis and electrical properties

Emergent Pseudocapacitance of 2D Nanomaterials

Contact Info

Product

Resources

About

Two-dimensional heterostructures of V2O5 and reduced graphene oxide as electrodes for high energy density asymmetric supercapacitors

Abstract: The 2D layered heterostructures of V2O5 nanosheets and reduced graphene oxide show high conductivity and superior asymmetric supercapacitor properties.

Cited by 202 publications

References 50 publications

Electroforming free resistive switching memory in two-dimensional VOx nanosheets

Electroforming free resistive switching memory in two-dimensional VOx nanosheets

Reduced graphene oxide wrapped V2O5 nanoparticles: green synthesis and electrical properties

Emergent Pseudocapacitance of 2D Nanomaterials

Contact Info

Product

Resources

About

Two-dimensional heterostructures of V₂O₅ and reduced graphene oxide as electrodes for high energy density asymmetric supercapacitors