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

4 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 Jan 1

Fingerprint

Ferrosoferric Oxide
Magnetite
magnetite
electrode
Carbon
Nanoparticles
Electrodes
ion
carbon
Surface-Active Agents
pyrolysis
surfactant
Pyrolysis
Surface active agents
shell
electron
Stress relaxation
ligand
Life cycle
conductivity

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Enhanced cycle stability of magnetite/carbon nanoparticles for li ion battery electrodes. / Seo, Seung Deok; Lee, Duk Hee; Shim, Hyun Woo; Lee, Sungjun; Kim, Dong-Wan.

In: Journal of the American Ceramic Society, Vol. 97, No. 5, 01.01.2014, p. 1413-1420.

Research output: Contribution to journalArticle

Seo, Seung Deok ; Lee, Duk Hee ; Shim, Hyun Woo ; Lee, Sungjun ; Kim, Dong-Wan. / Enhanced cycle stability of magnetite/carbon nanoparticles for li ion battery electrodes. In: Journal of the American Ceramic Society. 2014 ; Vol. 97, No. 5. pp. 1413-1420.
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