Charge transport and electrochemical properties of colloidal greigite (Fe3S4) nanoplatelets

Andrea Paolella, Chandramohan George, Mauro Povia, Yang Zhang, Roman Krahne, Marti Gich, Alessandro Genovese, Andrea Falqui, Maria Longobardi, Pablo Guardia, Teresa Pellegrino, Liberato Manna*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

Room-temperature superparamagnetic greigite nanoplatelets were synthesized using 3-methyl catechol as growth moderator and phase-control agent, in the presence of sulfur, thiosulfate, octadecylamine, and Fe2+. Dense films of nanoplatelets showed ohmic behavior in the 10-300 K range. In as-deposited films the resistivity increased with decreasing temperature (as for semiconductors), while in hydrazine-treated films it decreased with decreasing temperature, as for metals. The electrochemical properties of as-prepared greigite nanoplatelets upon lithiation/de-lithiation have been followed by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The electrodes containing greigite nanoplatelets were found to be active in the lithiation/delithiation processes.

Original languageEnglish (US)
Pages (from-to)3762-3768
Number of pages7
JournalChemistry of Materials
Volume23
Issue number16
DOIs
StatePublished - Aug 23 2011

Keywords

  • Nanocrystals
  • batteries
  • charge transport
  • greigite
  • iron sulfides

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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