Effect of Superhalogen Anions on the Electrochemical Behavior of V2O5 Electrodes in Redox Reactions with Lithium in EC-DMC/Li-Salt

R. Apostolova; B. Markovsky; D. Aurbach; E. Shembel

doi:10.1149/09501.0183ecst

Effect of Superhalogen Anions on the Electrochemical Behavior of V₂O₅ Electrodes in Redox Reactions with Lithium in EC-DMC/Li-Salt

R. Apostolova, B. Markovsky, D. Aurbach, E. Shembel

Department of Chemistry

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

It was established that the number of active sites for the insertion/extraction of lithium ions in/from the V₂O₅ structure in EC-DMC/Li-salt solutions depends on superhalogen anion. Unstable sites and their dependence on superhalogen anion (PF₆ ^-, AsF₆ ^-, ClO₄-) are identified during discharge-charge cycling of V₂O₅ electrodes. The number of open sites in V₂O₅ depends on the structure stability and conductivity of V₂O₅. To increase the structure stability in phase transitions, we propose the electrochemical doping of V₂O₅ by Mn²⁺. We propose that the conductivity and rate characteristics of V₂O₅ could be increased by its co-deposition with conducting polymer of polyaniline type. Using theoretical calculation simulations assumptions have been made regarding the difference in the solvation of lithium ions in an EC/DMC mixture with different ratios of the solvents.

Original language	English
Title of host publication	20th International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2019
Editors	Marie Sedlarikova, F. Klein
Publisher	IOP Publishing Ltd.
Pages	183-200
Number of pages	18
Edition	1
ISBN (Electronic)	9781607688877, 9781607688877
DOIs	https://doi.org/10.1149/09501.0183ecst
State	Published - 2019
Event	20th International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2019 - Brno, Czech Republic Duration: 25 Aug 2019 → 28 Aug 2019

Publication series

Name	ECS Transactions
Number	1
Volume	95
ISSN (Print)	1938-6737
ISSN (Electronic)	1938-5862

Conference

Conference	20th International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2019
Country/Territory	Czech Republic
City	Brno
Period	25/08/19 → 28/08/19

Bibliographical note

Publisher Copyright:
© The Electrochemical Society.

Access to Document

10.1149/09501.0183ecst

Cite this

Apostolova, R., Markovsky, B., Aurbach, D., & Shembel, E. (2019). Effect of Superhalogen Anions on the Electrochemical Behavior of V₂O₅ Electrodes in Redox Reactions with Lithium in EC-DMC/Li-Salt. In M. Sedlarikova, & F. Klein (Eds.), 20th International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2019 (1 ed., pp. 183-200). (ECS Transactions; Vol. 95, No. 1). IOP Publishing Ltd.. https://doi.org/10.1149/09501.0183ecst

Apostolova, R. ; Markovsky, B. ; Aurbach, D. et al. / Effect of Superhalogen Anions on the Electrochemical Behavior of V₂O₅ Electrodes in Redox Reactions with Lithium in EC-DMC/Li-Salt. 20th International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2019. editor / Marie Sedlarikova ; F. Klein. 1. ed. IOP Publishing Ltd., 2019. pp. 183-200 (ECS Transactions; 1).

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abstract = "It was established that the number of active sites for the insertion/extraction of lithium ions in/from the V2O5 structure in EC-DMC/Li-salt solutions depends on superhalogen anion. Unstable sites and their dependence on superhalogen anion (PF6 -, AsF6 -, ClO4-) are identified during discharge-charge cycling of V2O5 electrodes. The number of open sites in V2O5 depends on the structure stability and conductivity of V2O5. To increase the structure stability in phase transitions, we propose the electrochemical doping of V2O5 by Mn2+. We propose that the conductivity and rate characteristics of V2O5 could be increased by its co-deposition with conducting polymer of polyaniline type. Using theoretical calculation simulations assumptions have been made regarding the difference in the solvation of lithium ions in an EC/DMC mixture with different ratios of the solvents.",

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Apostolova, R, Markovsky, B, Aurbach, D & Shembel, E 2019, Effect of Superhalogen Anions on the Electrochemical Behavior of V₂O₅ Electrodes in Redox Reactions with Lithium in EC-DMC/Li-Salt. in M Sedlarikova & F Klein (eds), 20th International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2019. 1 edn, ECS Transactions, no. 1, vol. 95, IOP Publishing Ltd., pp. 183-200, 20th International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2019, Brno, Czech Republic, 25/08/19. https://doi.org/10.1149/09501.0183ecst

Effect of Superhalogen Anions on the Electrochemical Behavior of V₂O₅ Electrodes in Redox Reactions with Lithium in EC-DMC/Li-Salt. / Apostolova, R.; Markovsky, B.; Aurbach, D. et al.
20th International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2019. ed. / Marie Sedlarikova; F. Klein. 1. ed. IOP Publishing Ltd., 2019. p. 183-200 (ECS Transactions; Vol. 95, No. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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Apostolova R, Markovsky B, Aurbach D, Shembel E. Effect of Superhalogen Anions on the Electrochemical Behavior of V₂O₅ Electrodes in Redox Reactions with Lithium in EC-DMC/Li-Salt. In Sedlarikova M, Klein F, editors, 20th International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2019. 1 ed. IOP Publishing Ltd. 2019. p. 183-200. (ECS Transactions; 1). doi: 10.1149/09501.0183ecst