Lithiation of V2O3(SO4)2 - a flexible insertion host

Stephanie F. Linnell; Julia L. Payne; David M. Pickup; Alan V. Chadwick; A. Robert Armstrong; John T. S. Irvine

doi:10.1039/D0TA06608G

Lithiation of V₂O₃(SO₄)₂ - a flexible insertion host

Stephanie F. Linnell, Julia L. Payne, David M. Pickup, Alan V. Chadwick, A. Robert Armstrong, John T. S. Irvine

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Abstract

Materials that display strong capabilities for lithium insertion without significant change in unit cell size on cycling are of considerable importance for electrochemical applications. Here, we present V₂O₃(SO₄)₂ as a host for lithium-ion batteries. Electrochemically, 2.0 Li⁺ ions can be inserted, giving Li₂V₂O₃(SO₄)₂ with an oxidation state of V⁴⁺, as determined by X-ray absorption spectroscopy. The capacity of V₂O₃(SO₄)₂ can be increased from 157 mA h g⁻¹ to 313 mA h g⁻¹ with the insertion of two additional Li⁺ ions which would drastically improve the energy density of this material, but this would be over a wider potential range. Chemical lithiation using n-butyllithium was performed and characterisation using a range of techniques showed that a composition of Li₄V₂O₃(SO₄)₂ can be obtained with an oxidation state of V³⁺. Structural studies of the lithiated materials by X-ray diffraction showed that up to 4.0 Li⁺ ions can be inserted into V₂O₃(SO₄)₂ whilst maintaining its framework structure.

Original language	English
Pages (from-to)	19502-19512
Number of pages	11
Journal	Journal of Materials Chemistry A
Volume	8
Issue number	37
Early online date	10 Sept 2020
DOIs	https://doi.org/10.1039/D0TA06608G
Publication status	Published - 7 Oct 2020

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10.1039/D0TA06608GLicence: CC BY

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Copyright © 2020 The Author(s). Open Access Article. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Final published version, 2.82 MBLicence: CC BY

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@article{5e3ba21b944a47a9b62e36a3f11eb24c,

title = "Lithiation of V2O3(SO4)2 - a flexible insertion host",

abstract = "Materials that display strong capabilities for lithium insertion without significant change in unit cell size on cycling are of considerable importance for electrochemical applications. Here, we present V2O3(SO4)2 as a host for lithium-ion batteries. Electrochemically, 2.0 Li+ ions can be inserted, giving Li2V2O3(SO4)2 with an oxidation state of V4+, as determined by X-ray absorption spectroscopy. The capacity of V2O3(SO4)2 can be increased from 157 mA h g−1 to 313 mA h g−1 with the insertion of two additional Li+ ions which would drastically improve the energy density of this material, but this would be over a wider potential range. Chemical lithiation using n-butyllithium was performed and characterisation using a range of techniques showed that a composition of Li4V2O3(SO4)2 can be obtained with an oxidation state of V3+. Structural studies of the lithiated materials by X-ray diffraction showed that up to 4.0 Li+ ions can be inserted into V2O3(SO4)2 whilst maintaining its framework structure.",

author = "Linnell, {Stephanie F.} and Payne, {Julia L.} and Pickup, {David M.} and Chadwick, {Alan V.} and Armstrong, {A. Robert} and Irvine, {John T. S.}",

note = "The authors also thank EPSRC for funding of SFL's PhD thesis (EP/N509759/1).",

year = "2020",

month = oct,

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doi = "10.1039/D0TA06608G",

language = "English",

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TY - JOUR

T1 - Lithiation of V2O3(SO4)2 - a flexible insertion host

AU - Linnell, Stephanie F.

AU - Payne, Julia L.

AU - Pickup, David M.

AU - Chadwick, Alan V.

AU - Armstrong, A. Robert

AU - Irvine, John T. S.

N1 - The authors also thank EPSRC for funding of SFL's PhD thesis (EP/N509759/1).

PY - 2020/10/7

Y1 - 2020/10/7

N2 - Materials that display strong capabilities for lithium insertion without significant change in unit cell size on cycling are of considerable importance for electrochemical applications. Here, we present V2O3(SO4)2 as a host for lithium-ion batteries. Electrochemically, 2.0 Li+ ions can be inserted, giving Li2V2O3(SO4)2 with an oxidation state of V4+, as determined by X-ray absorption spectroscopy. The capacity of V2O3(SO4)2 can be increased from 157 mA h g−1 to 313 mA h g−1 with the insertion of two additional Li+ ions which would drastically improve the energy density of this material, but this would be over a wider potential range. Chemical lithiation using n-butyllithium was performed and characterisation using a range of techniques showed that a composition of Li4V2O3(SO4)2 can be obtained with an oxidation state of V3+. Structural studies of the lithiated materials by X-ray diffraction showed that up to 4.0 Li+ ions can be inserted into V2O3(SO4)2 whilst maintaining its framework structure.

AB - Materials that display strong capabilities for lithium insertion without significant change in unit cell size on cycling are of considerable importance for electrochemical applications. Here, we present V2O3(SO4)2 as a host for lithium-ion batteries. Electrochemically, 2.0 Li+ ions can be inserted, giving Li2V2O3(SO4)2 with an oxidation state of V4+, as determined by X-ray absorption spectroscopy. The capacity of V2O3(SO4)2 can be increased from 157 mA h g−1 to 313 mA h g−1 with the insertion of two additional Li+ ions which would drastically improve the energy density of this material, but this would be over a wider potential range. Chemical lithiation using n-butyllithium was performed and characterisation using a range of techniques showed that a composition of Li4V2O3(SO4)2 can be obtained with an oxidation state of V3+. Structural studies of the lithiated materials by X-ray diffraction showed that up to 4.0 Li+ ions can be inserted into V2O3(SO4)2 whilst maintaining its framework structure.

UR - https://doi.org/10.1039/D0TA90221G

U2 - 10.1039/D0TA06608G

DO - 10.1039/D0TA06608G

M3 - Article

SN - 2050-7488

VL - 8

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JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 37

ER -

Lithiation of V₂O₃(SO₄)₂ - a flexible insertion host

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