Simultaneous in-situ conductivity and cyclic voltammetry characterization of Li-ion intercalation into thin V2O5 films

M. D. Levi, Zhonghua Lu, Y. Gofer, Yaron Cohen, Yair Cohen, D. Aurbach, E. Vieil, J. Serose

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Cyclic voltammetry (CV) and in-situ electronic conductivity curves have been simultaneously measured during Li-ion insertion/de-insertion into/from thin, partially crystallized, LixV2O5 film in 1 M LiBF4 + propylene carbonate solution. A similarity has been observed between the CV curves and the plots of the derivative of conductivity, dσ/dE, versus potential. A semi-metal-to-insulator transition, and vice versa, has been observed (in intercalation and de-intercalation, respectively), ascribed to the ε- to δ-phase transition of LixV2O5. This transition is accompanied by an increase in the V-V distance between adjacent VO5 layers, and is probably responsible for the decrease in the film conductivity, realized via electron hopping between the high-and low-valence vanadium sites.

Original languageEnglish
Pages (from-to)12-20
Number of pages9
JournalJournal of Electroanalytical Chemistry
Volume479
Issue number1
DOIs
StatePublished - 22 Dec 1999

Bibliographical note

Funding Information:
This work has been partially supported by the French Ministry of Foreign Affairs and the APAPE (France) and the Ministry of Sciences and Arts (Israel) within the Arc-En-Ciel/Keshet collaboration program. We wish to thank the French Embassy in Tel-Aviv for their kind help in arranging the collaboration between the French and Israeli partners.

Keywords

  • Conductivity
  • Cyclic voltammetry
  • Film
  • Lithium ion

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