Soft-chemical synthesis and electrochemical characterization of multicomponent Mn 1-x-yCo xNi yO 2 Nanostructures

Tae Woo Kim, Sun Hee Lee, Seong Ju Hwang, Sang Hoon Hyun, Jin Ho Choy

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Nanostructured Mn 1-x-yCo xN yO 2 metal oxides are synthesized by one-pot hydrothermal reaction at low temperature. From powder X-ray diffraction and field emission-scanning electron microscopic analyses, it is found that the crystal structure and crystal morphology of the present materials are tunable by the control of the composition of precursor. 1D nanowires with α-MnO 2-type structure are prepared with low substitution rate of Co and Ni, while the increase of substituent contents leads to the formation of δ-MnO 2-structured 3D nanospheres consisting of 2D nanoplates. According to X-ray absorption near edge spectroscopy and chemical analyses, mixed valent Co III/Co IV and divalent Ni II ions are stabilized in the octahedral Mn sites of α-MnO 2- and δ-MnO 2-structures. The electrochemical measurements clearly demonstrate that the present nanostructured materials show promising electrode performances for lithium secondary batteries.

Original languageEnglish
Pages (from-to)3857-3861
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume7
Issue number11
DOIs
Publication statusPublished - 2007 Nov 1

Fingerprint

Secondary batteries
Nanospheres
X ray absorption
Lithium
Nanostructured materials
Field emission
X ray powder diffraction
Oxides
Nanowires
Nanostructures
Substitution reactions
Crystal structure
Metals
Spectroscopy
Ions
Scanning
storage batteries
Crystals
Electrodes
crystal morphology

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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title = "Soft-chemical synthesis and electrochemical characterization of multicomponent Mn 1-x-yCo xNi yO 2 Nanostructures",
abstract = "Nanostructured Mn 1-x-yCo xN yO 2 metal oxides are synthesized by one-pot hydrothermal reaction at low temperature. From powder X-ray diffraction and field emission-scanning electron microscopic analyses, it is found that the crystal structure and crystal morphology of the present materials are tunable by the control of the composition of precursor. 1D nanowires with α-MnO 2-type structure are prepared with low substitution rate of Co and Ni, while the increase of substituent contents leads to the formation of δ-MnO 2-structured 3D nanospheres consisting of 2D nanoplates. According to X-ray absorption near edge spectroscopy and chemical analyses, mixed valent Co III/Co IV and divalent Ni II ions are stabilized in the octahedral Mn sites of α-MnO 2- and δ-MnO 2-structures. The electrochemical measurements clearly demonstrate that the present nanostructured materials show promising electrode performances for lithium secondary batteries.",
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Soft-chemical synthesis and electrochemical characterization of multicomponent Mn 1-x-yCo xNi yO 2 Nanostructures. / Kim, Tae Woo; Lee, Sun Hee; Hwang, Seong Ju; Hyun, Sang Hoon; Choy, Jin Ho.

In: Journal of Nanoscience and Nanotechnology, Vol. 7, No. 11, 01.11.2007, p. 3857-3861.

Research output: Contribution to journalArticle

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T1 - Soft-chemical synthesis and electrochemical characterization of multicomponent Mn 1-x-yCo xNi yO 2 Nanostructures

AU - Kim, Tae Woo

AU - Lee, Sun Hee

AU - Hwang, Seong Ju

AU - Hyun, Sang Hoon

AU - Choy, Jin Ho

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N2 - Nanostructured Mn 1-x-yCo xN yO 2 metal oxides are synthesized by one-pot hydrothermal reaction at low temperature. From powder X-ray diffraction and field emission-scanning electron microscopic analyses, it is found that the crystal structure and crystal morphology of the present materials are tunable by the control of the composition of precursor. 1D nanowires with α-MnO 2-type structure are prepared with low substitution rate of Co and Ni, while the increase of substituent contents leads to the formation of δ-MnO 2-structured 3D nanospheres consisting of 2D nanoplates. According to X-ray absorption near edge spectroscopy and chemical analyses, mixed valent Co III/Co IV and divalent Ni II ions are stabilized in the octahedral Mn sites of α-MnO 2- and δ-MnO 2-structures. The electrochemical measurements clearly demonstrate that the present nanostructured materials show promising electrode performances for lithium secondary batteries.

AB - Nanostructured Mn 1-x-yCo xN yO 2 metal oxides are synthesized by one-pot hydrothermal reaction at low temperature. From powder X-ray diffraction and field emission-scanning electron microscopic analyses, it is found that the crystal structure and crystal morphology of the present materials are tunable by the control of the composition of precursor. 1D nanowires with α-MnO 2-type structure are prepared with low substitution rate of Co and Ni, while the increase of substituent contents leads to the formation of δ-MnO 2-structured 3D nanospheres consisting of 2D nanoplates. According to X-ray absorption near edge spectroscopy and chemical analyses, mixed valent Co III/Co IV and divalent Ni II ions are stabilized in the octahedral Mn sites of α-MnO 2- and δ-MnO 2-structures. The electrochemical measurements clearly demonstrate that the present nanostructured materials show promising electrode performances for lithium secondary batteries.

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