XAS and electrochemical characterization of lithiated high surface area V2O5 aerogels

Stefano Passerini; Dinh Ba Le; William H. Smyrl; Mario Berrettoni; Roberto Tossici; Roberto Marassi; Marco Giorgetti

doi:10.1016/s0167-2738(97)00438-4

XAS and electrochemical characterization of lithiated high surface area V₂O₅ aerogels

Stefano Passerini, Dinh Ba Le, William H. Smyrl, Mario Berrettoni, Roberto Tossici, Roberto Marassi, Marco Giorgetti

Chemical Engineering and Materials Science

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

71 Scopus citations

Abstract

V₂O₅ aerogel (ARG) has been recently proposed as cathode material for rechargeable lithium batteries. Such a material is amorphous and consists of a highly interconnected solid network with a surface area up to 450 m²/g, and a specific pore volume as much as 2.3 cm³/g. In a previous paper, it was shown that up to 4 equivalents of lithium per mole of V₂O₅ aerogel can be inserted by means of chemical or electrochemical lithiation. In the present work, the lithium composition range has been extended. By chemical lithiation (CL) a composition Li_5.8V₂O₅, the highest ever reported for any vanadium oxide host, was achieved. The equilibrium open circuit voltage (OCV)-composition curve of the chemically lithiated aerogel samples showed a wide plateau extending up to 5.8 equivalents of lithium per mole of V₂O₅. The surprisingly high OCV has been correlated with the characteristic morphology and structure of the aerogel material by means of X-ray diffraction and absorption and XPS spectroscopies.

Original language	English (US)
Pages (from-to)	195-204
Number of pages	10
Journal	Solid State Ionics
Volume	104
Issue number	3-4
DOIs	https://doi.org/10.1016/s0167-2738(97)00438-4
State	Published - Dec 11 1997

Bibliographical note

Funding Information:
The study was supported by Advanced Research Project Agency (ARPA)/University Research Initiative, Contract N/N00014-92-J-1875. Measurements at LURE were supported by the EEC TMR program (LURE project number PS 068-96).

Keywords

Aerogel
Lithium intercalation
Vanadium pentoxide

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title = "XAS and electrochemical characterization of lithiated high surface area V2O5 aerogels",

abstract = "V2O5 aerogel (ARG) has been recently proposed as cathode material for rechargeable lithium batteries. Such a material is amorphous and consists of a highly interconnected solid network with a surface area up to 450 m2/g, and a specific pore volume as much as 2.3 cm3/g. In a previous paper, it was shown that up to 4 equivalents of lithium per mole of V2O5 aerogel can be inserted by means of chemical or electrochemical lithiation. In the present work, the lithium composition range has been extended. By chemical lithiation (CL) a composition Li5.8V2O5, the highest ever reported for any vanadium oxide host, was achieved. The equilibrium open circuit voltage (OCV)-composition curve of the chemically lithiated aerogel samples showed a wide plateau extending up to 5.8 equivalents of lithium per mole of V2O5. The surprisingly high OCV has been correlated with the characteristic morphology and structure of the aerogel material by means of X-ray diffraction and absorption and XPS spectroscopies.",

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note = "Funding Information: The study was supported by Advanced Research Project Agency (ARPA)/University Research Initiative, Contract N/N00014-92-J-1875. Measurements at LURE were supported by the EEC TMR program (LURE project number PS 068-96). ",

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AU - Tossici, Roberto

AU - Marassi, Roberto

AU - Giorgetti, Marco

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N2 - V2O5 aerogel (ARG) has been recently proposed as cathode material for rechargeable lithium batteries. Such a material is amorphous and consists of a highly interconnected solid network with a surface area up to 450 m2/g, and a specific pore volume as much as 2.3 cm3/g. In a previous paper, it was shown that up to 4 equivalents of lithium per mole of V2O5 aerogel can be inserted by means of chemical or electrochemical lithiation. In the present work, the lithium composition range has been extended. By chemical lithiation (CL) a composition Li5.8V2O5, the highest ever reported for any vanadium oxide host, was achieved. The equilibrium open circuit voltage (OCV)-composition curve of the chemically lithiated aerogel samples showed a wide plateau extending up to 5.8 equivalents of lithium per mole of V2O5. The surprisingly high OCV has been correlated with the characteristic morphology and structure of the aerogel material by means of X-ray diffraction and absorption and XPS spectroscopies.

AB - V2O5 aerogel (ARG) has been recently proposed as cathode material for rechargeable lithium batteries. Such a material is amorphous and consists of a highly interconnected solid network with a surface area up to 450 m2/g, and a specific pore volume as much as 2.3 cm3/g. In a previous paper, it was shown that up to 4 equivalents of lithium per mole of V2O5 aerogel can be inserted by means of chemical or electrochemical lithiation. In the present work, the lithium composition range has been extended. By chemical lithiation (CL) a composition Li5.8V2O5, the highest ever reported for any vanadium oxide host, was achieved. The equilibrium open circuit voltage (OCV)-composition curve of the chemically lithiated aerogel samples showed a wide plateau extending up to 5.8 equivalents of lithium per mole of V2O5. The surprisingly high OCV has been correlated with the characteristic morphology and structure of the aerogel material by means of X-ray diffraction and absorption and XPS spectroscopies.

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