Amorphous sodium vanadate Na1.5+yVO3, a promising matrix for reversible sodium intercalation

Venkatesh, Gopal; Pralong, V.; Lebedev, Oleg I.; Caignaert, V.; Bazin, Philippe; Raveau, B.

doi:10.1016/j.elecom.2013.11.004

Cited by 47 publications

(33 citation statements)

References 32 publications

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“…A lower sodium amount of ≈ 0.5 is reversibly exchanged in the Na x VO 2 phases [31] with the occurrence of multiple voltage steps. The reversible capacity of 120 mAh g -1 allowed by the present NaV 2 O 5 compound compares very well with that reported for various sodium vanadates like Na 1.5+x VO 3 [30] , Na x VO 2 [31] and Na 0.33 V 2 O 5 [32,33]. For the first compound, a reversible capacity of ≈ 150 mAh g -1 is available but at a very low C/50 rate.…”

Section: Electrochemical Studysupporting

confidence: 76%

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Electrochemically formed α’-NaV2O5: A new sodium intercalation compound

Muller-Bouvet

Baddour‐Hadjean

Tanabe

et al. 2015

Electrochimica Acta

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Section: Electrochemical Studysupporting

confidence: 76%

“…This reversible Na uptake is close to that found for Na 1.5+x VO 3 operating at 1.6V with x max = 0.7 [30]. In that case, sodium insertion into NaVO 3 led to the formation of the Na 1.5 VO 3 amorphous phase used as rechargeable electrode.…”

Section: Electrochemical Studysupporting

confidence: 65%

Electrochemically formed α’-NaV2O5: A new sodium intercalation compound

Muller-Bouvet

Baddour‐Hadjean

Tanabe

et al. 2015

Electrochimica Acta

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“…[139] Other groups reported contrary results, and simultaneously a more marked capacity fading, [145,146] indicating that the structural changes upon Na + (de-) insertion need to be further investigated. [153] However, the working potential is lower than that of V 2 O 5 or VO 2 (B) and the irreversible capacity associated with the structural transition account for the loss of about 0.4 eq. Enlarging the electrochemical window from 4.0 V down to 0.1 V (usually the lower cut-off is set to 1.5 V vs Na + /Na), the bilayered V 2 O 5 can reversibly insert additional ions for a total capacity of about 500 mA h g −1 corresponding to more than 3 eq.…”

Section: Sodiummentioning

confidence: 99%

Bilayered Nanostructured V₂O₅·nH₂O for Metal Batteries

Moretti

Passerini

2016

Advanced Energy Materials

171

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Bilayered V2O5·nH2O prepared by sol–gel synthesis is generally assumed amorphous due to lack of long‐range structural order. However, at the nanoscale, a well‐organized repetition of bilayers is found and thus V2O5·nH2O can be considered a nanostructured material. Synthesis route affects the morphological and structural characteristics of V2O5·nH2O and, depending on the drying method used, xerogel and aerogel are obtained. The reduced structural order, the large interlayer space and the short diffusion length that this class of material offer are the key factors that allow V2O5·nH2O to reversibly host cations that are different in charge and dimensions. These properties make bilayered V2O5·nH2O materials almost unique for the wide range of applicability in metal batteries. Herein, a panoramic of the most common V2O5·nH2O synthesis methods and the peculiar characteristics of this material is given. A survey of the most important findings on the use of bilayered V2O5·nH2O for metal batteries is reported focusing on Li‐, Na‐ and Mg‐batteries. The increased number of publications recently divulgated confirms the renewed interest on V2O5·nH2O for energy storage and thus an updated rationalization of the findings can be helpful to guide further technological development and research activity in the field.

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“…Recently, we explored the electrochemical and chemical reduction of a nano-structured α-V 2 O 5 and aimed to obtain the new compound Na 3 V 2 O 5 with a disordered rock-salt type structure [14]. In addition, we noted the reversible capacity of 150 mAh/g at an average potential of 1.8 V obtained with Na 1.5+ x VO 3 [15]. The study of Na x VO 2 material is also a topic of interest and the Delmas group were the first to study the electrochemical Na-deintercalation from NaVO 2 [16].…”

Section: Introductionmentioning

confidence: 99%

Redox Activity of Sodium Vanadium Oxides towards Oxidation in Na Ion Batteries

2018

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The search for new materials that could be used as electrode material for Na-ion batteries is one of the most challenging issues of today. Many transition metal oxide families as well as transition metal polyanionic frameworks have been proposed over the last five years. In this work, we report the sodium extraction from Na2V3O7, which is a tunnel type structure built of [V3O7]2−∞ nanotubes held by sodium ions. We report a reversible charge capacity of 80 mAh/g at 2.8 V vs. Na+/Na due to the V5+/V4+ redox activity. No oxygen redox activity has been observed for this material nor for the vanadium (5+) oxide Na4V2O7.

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Amorphous sodium vanadate Na1.5+yVO3, a promising matrix for reversible sodium intercalation

Cited by 47 publications

References 32 publications

Electrochemically formed α’-NaV2O5: A new sodium intercalation compound

Electrochemically formed α’-NaV2O5: A new sodium intercalation compound

Bilayered Nanostructured V₂O₅·nH₂O for Metal Batteries

Redox Activity of Sodium Vanadium Oxides towards Oxidation in Na Ion Batteries

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Amorphous sodium vanadate Na1.5+yVO3, a promising matrix for reversible sodium intercalation

Cited by 47 publications

References 32 publications

Electrochemically formed α’-NaV2O5: A new sodium intercalation compound

Electrochemically formed α’-NaV2O5: A new sodium intercalation compound

Bilayered Nanostructured V2O5·nH2O for Metal Batteries

Redox Activity of Sodium Vanadium Oxides towards Oxidation in Na Ion Batteries

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Bilayered Nanostructured V₂O₅·nH₂O for Metal Batteries