Thermochemistry of the high and ambient temperature lithium vanadium bronze phases LixV2O5

Dickens, Peter; French, S.J.; Hight, A.T.; Pye, M.F.; Reynolds, G.J.

doi:10.1016/0167-2738(81)90015-1

Cited by 24 publications

(12 citation statements)

References 5 publications

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“…On crystallized V 2 O 5 thin films, these two steps are often indexed as corresponding to the two Li x V 2 O 5 orthorhombic phases. 32 Our experiments show that from a VO x amorphous film with an olive-green coloration which can be presumed relevant for an oxidation number near 4 for vanadium ions, the same two-step electrochromic behavior is observed. It can be concluded that the two successive changes of color are not associated with a well-identified phase transition but, in a more general way, associated with the two successive redox reactions between the three accessible oxidation numbers.…”

Section: ■ Experimental Sectionsupporting

confidence: 51%

Polyol Synthesis of Ti-V₂O₅ Nanoparticles and Their Use as Electrochromic Films

et al. 2016

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Herein, the successful synthesis of Ti-doped vanadium pentoxide from a polyol process is reported. A high Ti concentration (up to 8.5 mol % of the total metallic content) can be inserted in vanadium oxide thanks to the synthesis route leading to nanometric crystallites. X-ray diffraction patterns were refined showing the insertion of the titanium ions inside the free pentacoordinated sites in opposition to the vanadium square pyramidal sites. This crystal organization was shown in good agreement with the ab initio positioning performed from valence calculation. The nanoparticles, NPs, of Ti-doped VO compounds were characterized as electrochromic materials. Films elaborated from a dip-coating process from oxide particle suspensions exhibited three distinct colorations during the redox cycling in lithium-based electrolyte. These colors were associated with three distinct oxidation states for the vanadium ions: +III (blue), +IV (green), and +V (orange). The morphology of the films was shown to drastically impact the electrochromic performances in terms of electrochemical capacity and stability.

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Section: ■ Experimental Sectionsupporting

confidence: 51%

Polyol Synthesis of Ti-V₂O₅ Nanoparticles and Their Use as Electrochromic Films

et al. 2016

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“…The x-dependence of 2~Li cannot quantitatively [16]. Dickens et al [ 17,18 ] McCanny [26] indicate that the symmetric conduction band of LilTiS 2 is only half full; therefore the thermoelectric power of LilTiS 2 should be zero. The change of sign of the Seebeck coefficient for x > 0.26 might then be the result of the contribution of a nonsymmetric band to the shape of the conduction band.…”

Section: Theorymentioning

confidence: 99%

“…Also, the Seebeck coefficient decreases with increasing temperature, as is in accordance with eq. (17). The values for the heat of transport, determined directly from the (see table 2), and determined from the slope of the Seebeck coefficient versus reciprocal temperature curves (see fig.…”

Section: The Ionic Component Of the Thermoelectric Powermentioning

confidence: 99%

The thermodynamic and thermoelectric properties of LixTiS2 and LixCoO2

et al. 1984

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The partial thermodynamic functions Z~Li and Z~Li for LixTil.0sS 2 (0.13 ~ x a 0.97) and Li0.9sCoO 2 were obtained from EMF-temperature measurements (T = -30-20°C). For LixTil.oaS2, the x-dependence of these quantities is discussed in relation to a semiempirical expression for the EMF-x relation. The electronic component of the thermoelectric power in LixTil.0aS 2 (0 ~ x ~ 0.97, T = 50-200°C) and LixCoO 2 (0.20 ~ x ~ 1.00, T = 30-400°C) was determined. From the sign of the (electronic) Seebeck coefficient it followed that LixTil.03S 2 is a n-type and LixCoO 2 a ptype electronic conductor. The influence of the amount of inserted lithium and temperature dependence on the Seebeck coefficient is discussed. A new method to determine the ionic heat of transport directly from the ionic Seebeck coefficient was developed. This method was applied to LixTil.oaS 2 (0.61 ~ x ~ 0.97, T = -30-30°C). The heat of transport is much smaller than the activation enthalpy for Li+-conduction, indicating a high ionic polaron binding energy. Thermogravimetric analysis indicates that LixCoO 2 with x < 1 decomposes to LilCoO2 and Co203 at temperatures higher than 80°C. This is sustained by the data for the electronic Seebeck coefficient. Also the thermodynamic, thermoelectric and kinetic data of LixTil.03S 2 are critically compared with those of AgxTiS 2.

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“…What about the Li + ions? The layered‐type structure of Li 1+ x V 3 O 8 (LVO) was found to be a remarkable material as the cathode for storing metal ions with larger ionic radii [131–133] . With the similar ionic radii, Zn 2+ can also insert into the interlayer spaces of LVO and the LVO can act as the host material for Zn 2+ storage.…”

Section: Cathode Materialsmentioning

confidence: 99%

“…K + was applied to modify the structure of V 2 O 5 and it played ap ositive role in improving the cycle stability and reaction kinetics.W hat about the Li + ions?T he layered-type structure of Li 1 + x V 3 O 8 (LVO) was found to be ar emarkable material as the cathode for storing metal ions with larger ionic radii. [131][132][133] With the similar ionic radii, Zn 2 + can also insert into the interlayer spaceso fL VO and the LVOc an act as the host materialf or Zn 2 + storage. Kim et al reported novel LVOn anoparticles with excellent electrochemical Zn 2 + intercalation property and high reversible storagec apacities as the cathode materialf or ZIBs.…”

Section: Metal Vanadatesmentioning

confidence: 99%

Cathodes for Aqueous Zn‐Ion Batteries: Materials, Mechanisms, and Kinetics

Zuo

et al. 2020

Chemistry A European J

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As concerns about the safety of lithium‐ions batteries (LIBs) increases, aqueous zinc‐ion batteries (ZIBs) with a lower cost, higher safety, and higher co‐efficiency have attracted more and more interest. However, finding suitable cathode materials is still an urgent problem in ZIBs. In recent years, a lot of significant works have been reported, including manganese‐based cathodes, vanadium‐based cathodes, Prussian blue analog‐based materials, and sustainable quinone cathodes. In this review, some typical cathode materials are introduced. The detailed storage mechanisms and methods for improving the reaction kinetics of the zinc ions are summarized. Finally, the issues, challenges, and the research directions are provided.

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Thermochemistry of the high and ambient temperature lithium vanadium bronze phases LixV2O5

Cited by 24 publications

References 5 publications

Polyol Synthesis of Ti-V₂O₅ Nanoparticles and Their Use as Electrochromic Films

Polyol Synthesis of Ti-V₂O₅ Nanoparticles and Their Use as Electrochromic Films

The thermodynamic and thermoelectric properties of LixTiS2 and LixCoO2

Cathodes for Aqueous Zn‐Ion Batteries: Materials, Mechanisms, and Kinetics

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Thermochemistry of the high and ambient temperature lithium vanadium bronze phases LixV2O5

Cited by 24 publications

References 5 publications

Polyol Synthesis of Ti-V2O5 Nanoparticles and Their Use as Electrochromic Films

Polyol Synthesis of Ti-V2O5 Nanoparticles and Their Use as Electrochromic Films

The thermodynamic and thermoelectric properties of LixTiS2 and LixCoO2

Cathodes for Aqueous Zn‐Ion Batteries: Materials, Mechanisms, and Kinetics

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Polyol Synthesis of Ti-V₂O₅ Nanoparticles and Their Use as Electrochromic Films

Polyol Synthesis of Ti-V₂O₅ Nanoparticles and Their Use as Electrochromic Films