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Beilstein J Nanotechnol. 2014 Mar 19;5:323-8. doi: 10.3762/bjnano.5.36. eCollection 2014.

Thermal stability and reduction of iron oxide nanowires at moderate temperatures.

Author information

  • 1CNR-ISC, U.O.S. La Sapienza, Piazzale Aldo Moro 2, I - 00185 Roma, Italy.
  • 2Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I - 00185 Roma, Italy.
  • 3Dipartimento di Chimica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I - 00185 Roma, Italy.

Abstract

BACKGROUND:

The thermal stability of iron oxide nanowires, which were obtained with a hard template method and are promising elements of Li-ion based batteries, has been investigated by means of thermogravimetry, infrared and photoemission spectroscopy measurements.

RESULTS:

The chemical state of the nanowires is typical of the Fe2O3 phase and the stoichiometry changes towards a Fe3O4 phase by annealing above 440 K. The shape and morphology of the nanowires is not modified by moderate thermal treatment, as imaged by scanning electron microscopy.

CONCLUSION:

This complementary spectroscopy-microscopy study allows to assess the temperature limits of these Fe2O3 nanowires during operation, malfunctioning or abuse in advanced Li-ion based batteries.

KEYWORDS:

IR spectroscopy; XPS; iron oxide; nanowires; scanning electron microscopy (SEM); thermogravimetry

PMID:
24778955
[PubMed]
PMCID:
PMC3999828
Free PMC Article
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