Electrostatic spray deposition of porous Fe2V4O13 films as electrodes for Li-ion batteries

Si-Rong Li, Murat Nulati Yesibolati, Yu Qiao, Si-Yuan Ge, Xu-Yong Feng, Jun-Fa Zhu, Chun-Hua Chen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Porous thin films composed of complex Fe/V oxides (crystalline Fe2V4O13 and amorphous Fe2V4O12.29) are prepared by electrostatic spray deposition technique. The crystalline Fe2V4O13 thin film shows a high initial capacity of 409 mAh g-1. The cyclic voltammetry analysis of a Fe2V4O13/Li cell reveals that the crystalline Fe2V4O13 undergoes an irreversible phase transition when the lower cut-off voltage is below 2.5 V. Compared with the crystalline Fe2V4O13, the amorphous Fe2V4O12.29 thin film delivers a lower initial capacity of 349.9 mAh g-1 but exhibits better cycling performance in the voltage range of 1.0-4.0 V. After 50 cycles, its capacity can still reach around 200 mAh g-1. X-ray photoelectron spectroscopy (XPS) reveals that the Fe2V4O12.29 thin film contains ions of mixed valence states V5+/V4+ and Fe3+/Fe2+, resulting in better rate capability for Fe2V4O12.29 than for Fe2V4O13. These results indicate that the amorphous Fe/V-oxide film is a promising electrode material for high energy applications. (C) 2012 Elsevier B. V. All rights reserved.
Original languageEnglish
JournalJournal of Alloys and Compounds
Volume520
Pages (from-to)77-82
Number of pages6
ISSN0925-8388
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • Electrode material
  • Electrostatic spray deposition
  • Iron vanadate
  • Lithium ion battery
  • Thin film

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