Enhanced cycle stability of magnetite/carbon nanoparticles for li ion battery electrodes

Seung Deok Seo, Duk Hee Lee, Hyun Woo Shim, Sungjun Lee, Dong Wan Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We demonstrate a facile synthesis of monodisperse magnetite (Fe 3O4) nanoparticles (NPs) via a simple wet chemical route at 180°C using oleylamine (C18H37N), which serves as a solvent, ligand, and surfactant. The particles have a narrow size distribution centered at about 10 nm. To provide better electron conductivity and structural stability, the as-synthesized particles are given a carbon nanocoating by pyrolysis of the residual surfactant on their surface. This pyrolysis forms a uniform thin nanocoating on each particle, and a core/shell Fe3O 4/carbon NP network was thus obtained. The core/shell Fe 3O4/carbon electrode shows better reversible capacity, cycle life, and rate capability than a bare Fe3O4 NP electrode because of its efficient electron transport and stress relaxation provided by the thin carbon layer.

Original languageEnglish
Pages (from-to)1413-1420
Number of pages8
JournalJournal of the American Ceramic Society
Volume97
Issue number5
DOIs
Publication statusPublished - 2014 May

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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