Bottom-up in situ formation of Fe3O4 nanocrystals in a porous carbon foam for lithium-ion battery anodes

Taegyun Yoon, Changju Chae, Yang Kook Sun, Xin Zhao, Harold H Kung, Jung Kyoo Lee

Research output: Contribution to journalArticle

158 Citations (Scopus)

Abstract

A facile and scalable process for the in situ formation of Fe 3O4 nanocrystals in a pre-formed carbon foam (CF) (Fe 3O4/CF) was developed, which involved impregnation of an aqueous iron nitrate solution onto CF followed by controlled thermal treatment in an inert atmosphere. N2 adsorption/desorption and BET measurements showed that the CF was a mesoporous carbon with a high pore volume and specific surface area. Transmission electron microscopy, scanning electron microscopy, X-ray diffraction measurement, thermogravimetric analysis, and X-ray photoelectron spectroscopy (XPS) revealed that 5-50 nm Fe3O 4 nanocrystals at a high loading of 78.7 wt% were formed preferentially in the confined pores of CF. When tested for anode material in a Li ion half-cell, the Fe3O4/CF composite was far superior to unsupported Fe3O4 nanocrystals, exhibiting significantly improved Coulombic efficiencies and cycling stability and achieving >780 mA h g-1 after 50 deep charge-discharge cycles with >95% cycling efficiency.

Original languageEnglish
Pages (from-to)17325-17330
Number of pages6
JournalJournal of Materials Chemistry
Volume21
Issue number43
DOIs
Publication statusPublished - Nov 21 2011

Fingerprint

Nanocrystals
Foams
Anodes
Carbon
Lithium-ion batteries
Impregnation
Specific surface area
Nitrates
Thermogravimetric analysis
Desorption
Iron
X ray photoelectron spectroscopy
Heat treatment
Ions
Transmission electron microscopy
Adsorption
X ray diffraction
Scanning electron microscopy
Composite materials

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemistry(all)

Cite this

Bottom-up in situ formation of Fe3O4 nanocrystals in a porous carbon foam for lithium-ion battery anodes. / Yoon, Taegyun; Chae, Changju; Sun, Yang Kook; Zhao, Xin; Kung, Harold H; Lee, Jung Kyoo.

In: Journal of Materials Chemistry, Vol. 21, No. 43, 21.11.2011, p. 17325-17330.

Research output: Contribution to journalArticle

Yoon, Taegyun ; Chae, Changju ; Sun, Yang Kook ; Zhao, Xin ; Kung, Harold H ; Lee, Jung Kyoo. / Bottom-up in situ formation of Fe3O4 nanocrystals in a porous carbon foam for lithium-ion battery anodes. In: Journal of Materials Chemistry. 2011 ; Vol. 21, No. 43. pp. 17325-17330.
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