Roomerature synthesis leading to nanocrystalline Ag2V 4O11

Frédéric Sauvage; Vincent Bodenez; Jean Marie Tarascon; Kenneth R. Poeppelmeier

doi:10.1021/ja1009713

Roomerature synthesis leading to nanocrystalline Ag₂V ₄O₁₁

Frédéric Sauvage, Vincent Bodenez, Jean Marie Tarascon, Kenneth R. Poeppelmeier

Chemistry

Research output: Contribution to journal › Article › peer-review

71 Scopus citations

Abstract

This work highlights a roomerature composition study of the Ag ₂O/V₂O₅/HF_(aq) ternary system, leading to the precipitation of either various silver vanadates having Ag/V ratios from 1/2 to 3/1 or the new silver vanadium oxyfluoride compounds Ag ₄V₂O₆F₂ and Ag₃VO ₂F₄, and a synthetic procedure that affords nanocrystalline Ag₂V₄O₁₁ (SVO) at room temperature. The as-precipitated SVO particles exhibit an acicular morphology, 10-15 - 50-200 nm in size, and present a peculiar reactivity vs lithium notably through a Ag⁺/Li⁺ displacement reaction that progresses in a reversible fashion. This step forward thus enables the reversible and simultaneous combination of two active redox processes (silver and vanadium), providing a significant enhancement in the cathode gravimetric capacity of 320 mAh/g at C rate and more than 250 mAh/g at 5C.

Original language	English (US)
Pages (from-to)	6778-6782
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	132
Issue number	19
DOIs	https://doi.org/10.1021/ja1009713
State	Published - May 19 2010

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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title = "Roomerature synthesis leading to nanocrystalline Ag2V 4O11",

abstract = "This work highlights a roomerature composition study of the Ag 2O/V2O5/HF(aq) ternary system, leading to the precipitation of either various silver vanadates having Ag/V ratios from 1/2 to 3/1 or the new silver vanadium oxyfluoride compounds Ag 4V2O6F2 and Ag3VO 2F4, and a synthetic procedure that affords nanocrystalline Ag2V4O11 (SVO) at room temperature. The as-precipitated SVO particles exhibit an acicular morphology, 10-15 - 50-200 nm in size, and present a peculiar reactivity vs lithium notably through a Ag+/Li+ displacement reaction that progresses in a reversible fashion. This step forward thus enables the reversible and simultaneous combination of two active redox processes (silver and vanadium), providing a significant enhancement in the cathode gravimetric capacity of 320 mAh/g at C rate and more than 250 mAh/g at 5C.",

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AU - Sauvage, Frédéric

AU - Bodenez, Vincent

AU - Tarascon, Jean Marie

AU - Poeppelmeier, Kenneth R.

PY - 2010/5/19

Y1 - 2010/5/19

N2 - This work highlights a roomerature composition study of the Ag 2O/V2O5/HF(aq) ternary system, leading to the precipitation of either various silver vanadates having Ag/V ratios from 1/2 to 3/1 or the new silver vanadium oxyfluoride compounds Ag 4V2O6F2 and Ag3VO 2F4, and a synthetic procedure that affords nanocrystalline Ag2V4O11 (SVO) at room temperature. The as-precipitated SVO particles exhibit an acicular morphology, 10-15 - 50-200 nm in size, and present a peculiar reactivity vs lithium notably through a Ag+/Li+ displacement reaction that progresses in a reversible fashion. This step forward thus enables the reversible and simultaneous combination of two active redox processes (silver and vanadium), providing a significant enhancement in the cathode gravimetric capacity of 320 mAh/g at C rate and more than 250 mAh/g at 5C.

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Roomerature synthesis leading to nanocrystalline Ag₂V ₄O₁₁

Abstract

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