A phase transformation route to Fe2O3-Mn 3O4 nanocomposite with improved electrode performance

Seung Mi Oh, In Young Kim, Su Jeong Kim, Woong Jung, Seong Ju Hwang

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Intimately mixed nanocomposite of Fe2O3 and Mn 3O4 is synthesized by an electrostatically-derived self-assembly between exfoliated MnO2 nanosheets and Fe cations, which is followed by heat-treatment at elevated temperature. The as-prepared Fe-layered MnO2 nanocomposite experiences phase transformations into Fe-substituted Mn3-xFexO4 nanoparticle at 450 C and Fe2O3-Mn3O4 nanocomposite at 650 C. The Fe2O3-Mn3O4 nanocomposite shows better performance as anode material for lithium ion batteries than the Fe-substituted Mn3-xFexO4 nanoparticle, indicating the beneficial effect of composite formation on the electrode performance of 3d metal oxide. The present finding underscores that a self-assembly between exfoliated metal oxide nanosheets and metal cations can provide useful precursor for efficient composite electrode materials.

Original languageEnglish
Pages (from-to)221-224
Number of pages4
JournalMaterials Letters
Volume107
DOIs
Publication statusPublished - 2013 Jul 11

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phase transformations
Nanocomposites
nanocomposites
Phase transitions
routes
Electrodes
electrodes
Nanosheets
Metals
Self assembly
Oxides
metal oxides
Cations
self assembly
Positive ions
Nanoparticles
cations
nanoparticles
composite materials
Composite materials

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Oh, Seung Mi ; Kim, In Young ; Kim, Su Jeong ; Jung, Woong ; Hwang, Seong Ju. / A phase transformation route to Fe2O3-Mn 3O4 nanocomposite with improved electrode performance. In: Materials Letters. 2013 ; Vol. 107. pp. 221-224.
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A phase transformation route to Fe2O3-Mn 3O4 nanocomposite with improved electrode performance. / Oh, Seung Mi; Kim, In Young; Kim, Su Jeong; Jung, Woong; Hwang, Seong Ju.

In: Materials Letters, Vol. 107, 11.07.2013, p. 221-224.

Research output: Contribution to journalArticle

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AB - Intimately mixed nanocomposite of Fe2O3 and Mn 3O4 is synthesized by an electrostatically-derived self-assembly between exfoliated MnO2 nanosheets and Fe cations, which is followed by heat-treatment at elevated temperature. The as-prepared Fe-layered MnO2 nanocomposite experiences phase transformations into Fe-substituted Mn3-xFexO4 nanoparticle at 450 C and Fe2O3-Mn3O4 nanocomposite at 650 C. The Fe2O3-Mn3O4 nanocomposite shows better performance as anode material for lithium ion batteries than the Fe-substituted Mn3-xFexO4 nanoparticle, indicating the beneficial effect of composite formation on the electrode performance of 3d metal oxide. The present finding underscores that a self-assembly between exfoliated metal oxide nanosheets and metal cations can provide useful precursor for efficient composite electrode materials.

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