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.
|Number of pages||8|
|Journal||Journal of the American Ceramic Society|
|Publication status||Published - 2014 May|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry