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

doi:10.1016/j.matlet.2013.05.050

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

Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

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 Mn_3-xFe_xO₄ 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 Mn_3-xFe_xO₄ 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 language	English
Pages (from-to)	221-224
Number of pages	4
Journal	Materials Letters
Volume	107
DOIs	https://doi.org/10.1016/j.matlet.2013.05.050
State	Published - 2013

Keywords

Energy storage and conversion
Nanocomposites
Nanoparticles
Nanosize
Particles
Phase transformation

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10.1016/j.matlet.2013.05.050

Cite this

@article{cd48d64a9fb94a4d8f0bb809c19bc7a4,

title = "A phase transformation route to Fe2O3-Mn 3O4 nanocomposite with improved electrode performance",

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.",

keywords = "Energy storage and conversion, Nanocomposites, Nanoparticles, Nanosize, Particles, Phase transformation",

author = "Oh, {Seung Mi} and Kim, {In Young} and Kim, {Su Jeong} and Woong Jung and Hwang, {Seong Ju}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) ( NRF-2010-C1AAA001-2010-0029065 ) and by the Core Technology of Materials Research and Development Program of the Korea Ministry of Intelligence and Economy (Grant no. 10041232 ). The experiments at PAL were supported in part by MOST and POSTECH . ",

year = "2013",

doi = "10.1016/j.matlet.2013.05.050",

language = "English",

volume = "107",

pages = "221--224",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier",

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T1 - A phase transformation route to Fe2O3-Mn 3O4 nanocomposite with improved electrode performance

AU - Oh, Seung Mi

AU - Kim, In Young

AU - Kim, Su Jeong

AU - Jung, Woong

AU - Hwang, Seong Ju

N1 - Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) ( NRF-2010-C1AAA001-2010-0029065 ) and by the Core Technology of Materials Research and Development Program of the Korea Ministry of Intelligence and Economy (Grant no. 10041232 ). The experiments at PAL were supported in part by MOST and POSTECH .

PY - 2013

Y1 - 2013

N2 - 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.

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.

KW - Energy storage and conversion

KW - Nanocomposites

KW - Nanoparticles

KW - Nanosize

KW - Particles

KW - Phase transformation

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