Quasiparticle band structure and excitonic optical response in V 2 O 5 bulk and monolayer
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Garcia, Claudio (ORCID:0009000077503536)↗
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Materials Data on V2O5 by Materials Project
V2O5 crystallizes in the monoclinic P2_1/m space group. The structure is two-dimensional and consists of one V2O5 sheet oriented in the (0, 0, 1) direction. there are two inequivalent V5+ sites. In the first V5+ site, V5+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of V–O bond distances ranging from 1.60–2.36 Å. In the second V5+ site, V5+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of V–O bond distances ranging from 1.67–2.35 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to three V5+ atoms. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to two V5+ atoms. In the third O2- site, O2- is bonded in a linear geometry to two V5+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to four V5+ atoms. In the fifth O2- site, O2- is bonded in a single-bond geometry to one V5+ atom.
36 MATERIALS SCIENCE↗
Materials Data on V2O5 by Materials Project
V2O5 crystallizes in the orthorhombic Pmmn space group. The structure is two-dimensional and consists of one V2O5 sheet oriented in the (0, 1, 0) direction. V5+ is bonded to six O2- atoms to form a mixture of corner and edge-sharing VO6 octahedra. The corner-sharing octahedral tilt angles are 20°. There are a spread of V–O bond distances ranging from 1.81–2.03 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three equivalent V5+ atoms. In the second O2- site, O2- is bonded in a water-like geometry to two equivalent V5+ atoms. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent V5+ atoms.
36 MATERIALS SCIENCE↗
Materials Data on V2O5 by Materials Project
V2O5 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of two V2O5 sheets oriented in the (-1, 0, 1) direction. there are two inequivalent V5+ sites. In the first V5+ site, V5+ is bonded to four O2- atoms to form corner-sharing VO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.64–1.80 Å. In the second V5+ site, V5+ is bonded to four O2- atoms to form corner-sharing VO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.63–1.83 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent V5+ atoms. In the second O2- site, O2- is bonded in a linear geometry to two V5+ atoms. In the third O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent V5+ atoms.
36 MATERIALS SCIENCE↗
Materials Data on V2O5 by Materials Project
V2O5 crystallizes in the monoclinic P2/c space group. The structure is two-dimensional and consists of one V2O5 sheet oriented in the (0, 1, 0) direction. there are seven inequivalent V5+ sites. In the first V5+ site, V5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of V–O bond distances ranging from 1.61–2.06 Å. In the second V5+ site, V5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of V–O bond distances ranging from 1.61–1.83 Å. In the third V5+ site, V5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of V–O bond distances ranging from 1.61–1.97 Å. In the fourth V5+ site, V5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of V–O bond distances ranging from 1.61–2.05 Å. In the fifth V5+ site, V5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of V–O bond distances ranging from 1.61–2.08 Å. In the sixth V5+ site, V5+ is bonded to four O2- atoms to form corner-sharing VO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.61–1.82 Å. In the seventh V5+ site, V5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of V–O bond distances ranging from 1.61–2.05 Å. There are eighteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three V5+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to two V5+ atoms. In the third O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to two V5+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two V5+ atoms. In the seventh O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the eighth O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the ninth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three V5+ atoms. In the tenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three V5+ atoms. In the eleventh O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three V5+ atoms. In the twelfth O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the thirteenth O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the fourteenth O2- site, O2- is bonded in a bent 120 degrees geometry to two V5+ atoms. In the fifteenth O2- site, O2- is bonded in a bent 120 degrees geometry to two V5+ atoms. In the sixteenth O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the seventeenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three V5+ atoms. In the eighteenth O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent V5+ atoms.
36 MATERIALS SCIENCE↗
Materials Data on V2O5 by Materials Project
V2O5 crystallizes in the triclinic P-1 space group. The structure is two-dimensional and consists of one V2O5 sheet oriented in the (0, 0, 1) direction. there are two inequivalent V5+ sites. In the first V5+ site, V5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of V–O bond distances ranging from 1.61–1.88 Å. In the second V5+ site, V5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of V–O bond distances ranging from 1.60–2.02 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two V5+ atoms. In the second O2- site, O2- is bonded in a trigonal planar geometry to three V5+ atoms. In the third O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two V5+ atoms.
36 MATERIALS SCIENCE↗
Materials Data on V2O5 by Materials Project
V2O5 crystallizes in the monoclinic C2/m space group. The structure is two-dimensional and consists of one V2O5 sheet oriented in the (0, 0, 1) direction. V5+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing VO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of V–O bond distances ranging from 1.81–2.04 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to two equivalent V5+ atoms. In the second O2- site, O2- is bonded in a water-like geometry to two equivalent V5+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three equivalent V5+ atoms.
36 MATERIALS SCIENCE↗
Interlayer Exciton Polarons in Mesoscopic V 2 O 5 for Broadband Optoelectronic Synapses
Persistent photoconductivity and optoelectronic synaptic behavior are demonstrated in solution-processed mesoscopic α-phase vanadium pentoxide (V 2 O 5 ) thin films. First-principles simulations coupled with the two-site Holstein polaron hopping model show that vacancies at the terminal oxygen position lead to long recombination times because photoexcited electrons and holes reside on different layers separated by the van der Waals gap, forming a weakly coupled interlayer exciton polaron. Mid-gap polaronic states also significantly broaden the photoresponse of the films to span across visible and infrared wavelengths. By controlling the amplitude/intensity, duration, and/or number of optical pulses, tunable optoelectronic memory functions, such as short-term and long-term plasticity, are experimentally established in V 2 O 5 -based optoelectronic synapses. Furthermore, device fabrication was extended to mechanically flexible ultrathin glass substrates. Flexible optoelectronic synapses maintained high performance after 150 bending cycles.
Phan, Thanh Luan [National Renewable Energy Labora↗
Water-lubricated intercalation in V2O5·nH2O for high-capacity and high-rate aqueous rechargeable zinc batteries
Co-intercalation is an effective approach to tune the diffusion coefficient with which cations insert into the electrodes for energy storage devices. By applying this concept in aqueous Zn batteries, a prospective system for stationary energy storage, we demonstrate the critical role of structural H2O on Zn2+ intercalation into bilayer V2O5·nH2O. The H2O solvation of Zn2+ largely reduces its effective charge and thus electrostatic interaction with the V2O5 framework, evidently promoting the diffusion of solvated Zn2+. Benefited from the ‘lubricating’ effect, the aqueous Zn battery shows a specific energy of ~ 305 Wh kg-1 (based on cathode), comparable to those of LiCoO2//Graphite batteries. Meanwhile, it can maintain an energy density of 199 Wh kg-1 at a high power density of 24 kW kg-1 with a capacity retention of 88% after 900 cycles, making it a promising candidate for high-performance, low-cost, safe and environmentally friendly energy storage device.
Yan, Mengyu↗
Materials Data on V2O5 by Materials Project
V2O5 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. V5+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing VO6 octahedra. The corner-sharing octahedra tilt angles range from 26–56°. There are a spread of V–O bond distances ranging from 1.68–2.17 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to three equivalent V5+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent V5+ atoms. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent V5+ atoms.
36 MATERIALS SCIENCE↗
Materials Data on V2O5 by Materials Project
V2O5 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. V5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of V–O bond distances ranging from 1.65–2.27 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent V5+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent V5+ atoms. In the third O2- site, O2- is bonded in a linear geometry to two equivalent V5+ atoms.
36 MATERIALS SCIENCE↗
Materials Data on V2O5 by Materials Project
V2O5 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. V5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of V–O bond distances ranging from 1.61–2.07 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a square co-planar geometry to four equivalent O2- atoms. All O–O bond lengths are 2.74 Å. In the second O2- site, O2- is bonded in a single-bond geometry to one V5+ and two equivalent O2- atoms. In the third O2- site, O2- is bonded to four equivalent V5+ atoms to form a mixture of distorted corner and edge-sharing OV4 trigonal pyramids.
36 MATERIALS SCIENCE↗
An unexpectedly shrunken bandgap in V2O5 nanoparticles
Synchrotron x-ray spectroscopy was employed to determine the effects of nanostructuring on electronic band structure in V2O5, a promising cathode material and widely used catalyst. V2O5nanoparticle and bulk powders were characterized via P-XRD, electron microscopy, and diffuse reflectance ultraviolet/visible/near-infrared spectroscopy to confirm the optical bandgap. X-ray emission spectroscopy revealed the nanoparticle valence band O 2pstates to be upshifted relative to the bulk, while x-ray absorption spectroscopy and resonant inelastic x-ray scattering showed the lowest V 3dconduction band states to be static. Together, these changes (in conjunction with an increased density of unoccupied lower conduction band states) produce a shrunken bandgap in the V2O5nanoparticles that defies the Burstein-Moss effect. Changes in nanoparticle band structure are generally attributed to oxygen vacancy defects. While nanostructure bandgap reduction is in line with much previous computational work, it is unexpected from most previous experimental results. To our knowledge, this is the first synchrotron x-ray spectroscopy study of a shrunken bandgap achieved in pure V2O5nanoparticles.
Anquillare, E L↗
Ultra-fast NH4+ Storage: Strong H Bonding between NH4+ and Bi-layered V2O5
Not Available
25 ENERGY STORAGE↗
Materials Data on V2O5 by Materials Project
Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
36 MATERIALS SCIENCE↗
Materials Data on V2O5 by Materials Project
Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
36 MATERIALS SCIENCE↗
Materials Data on V2O5 by Materials Project
Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
36 MATERIALS SCIENCE↗
Materials Data on V2O5 by Materials Project
Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
36 MATERIALS SCIENCE↗