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

doi:10.1166/jnn.2007.049

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

Department of Materials Science and Engineering

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

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 language	English
Pages (from-to)	3857-3861
Number of pages	5
Journal	Journal of Nanoscience and Nanotechnology
Volume	7
Issue number	11
DOIs	https://doi.org/10.1166/jnn.2007.049
Publication status	Published - 2007 Nov

All Science Journal Classification (ASJC) codes

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

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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.",

author = "Kim, {Tae Woo} and Lee, {Sun Hee} and Hwang, {Seong Ju} and Hyun, {Sang Hoon} and Choy, {Jin Ho}",

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AU - Kim, Tae Woo

AU - Lee, Sun Hee

AU - Hwang, Seong Ju

AU - Hyun, Sang Hoon

AU - Choy, Jin Ho

PY - 2007/11

Y1 - 2007/11

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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Soft-chemical synthesis and electrochemical characterization of multicomponent Mn _1-x-yCo _xNi _yO ₂ Nanostructures

Abstract

All Science Journal Classification (ASJC) codes

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