Fabrication and electrochemical characterization of amorphous lithium iron silicate thin films as positive electrodes for lithium batteries

I. Quinzeni, S. Ferrari*, E. Quartarone, D. Capsoni, M. Caputo, A. Goldoni, P. Mustarelli, M. Bini

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

In this work we reported, for the first time, the preparation by radio frequency sputtering and the electrochemical characterization of Li/M/Si/O thin films (M = Fe, Mn), as positive electrodes for lithium microbatteries. The deposited films were amorphous both in case of pure iron and mixed iron/manganese compositions. The electrochemical performances, in terms of capacity values and coulombic efficiency, were comparable to those currently reported for the corresponding crystalline bulk materials. In particular, capacities of the order of 50 mAh g-1 were obtained at 2.5 C with coulombic efficiency near 90% by using a standard liquid electrolyte. Our preliminary electrochemical results, together with the easiness of preparation, suggested that Li/M/Si/O thin films could be interesting candidates as cathodes in lithium microbatteries.

Original languageEnglish
Pages (from-to)179-185
Number of pages7
JournalJournal of Power Sources
Volume266
DOIs
Publication statusPublished - 15 Nov 2014

Keywords

  • Cyclic voltammetry
  • Lithium microbattery
  • Thin film
  • XPS
  • r.f. sputtering

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