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 | |
| Publication status | Published - 2007 Nov 1 |
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All Science Journal Classification (ASJC) codes
- Bioengineering
- Chemistry(all)
- Biomedical Engineering
- Materials Science(all)
- Condensed Matter Physics
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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 journal › Article
TY - JOUR
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
PY - 2007/11/1
Y1 - 2007/11/1
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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U2 - 10.1166/jnn.2007.049
DO - 10.1166/jnn.2007.049
M3 - Article
C2 - 18047074
AN - SCOPUS:38449088289
VL - 7
SP - 3857
EP - 3861
JO - Journal of Nanoscience and Nanotechnology
JF - Journal of Nanoscience and Nanotechnology
SN - 1533-4880
IS - 11
ER -