Charge transport and electrochemical properties of colloidal greigite (Fe<inf>3</inf>S<inf>4</inf>) 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

    Research output: Contribution to journalArticleResearchpeer-review

    50 Citations (Scopus)

    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. © 2011 American Chemical Society.
    Original languageEnglish
    Pages (from-to)3762-3768
    JournalChemistry of Materials
    Volume23
    Issue number16
    DOIs
    Publication statusPublished - 23 Aug 2011

    Keywords

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

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