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

Title
Soft-chemical synthesis and electrochemical characterization of multicomponent Mn 1-x-yCo xNi yO 2 Nanostructures
Authors
Kim T.W.Lee S.H.Hwang S.-J.Hyun S.H.Choy J.-H.
Ewha Authors
최진호황성주
SCOPUS Author ID
최진호scopus; 황성주scopus
Issue Date
2007
Journal Title
Journal of Nanoscience and Nanotechnology
ISSN
1533-4880JCR Link
Citation
vol. 7, no. 11, pp. 3857 - 3861
Indexed
SCI; SCIE; SCOPUS WOS 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. Copyright © 2007 American Scientific Publishers All rights reserved.
DOI
10.1166/jnn.2007.049
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자연과학대학 > 화학·나노과학전공 > Journal papers
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