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Synthesis and electrochemical characterization of 2D nanostructured Li 4Ti 5O 12 with lithium electrode functionality

Title
Synthesis and electrochemical characterization of 2D nanostructured Li 4Ti 5O 12 with lithium electrode functionality
Authors
Han S.-Y.Young Kim I.Hwang S.-J.
Ewha Authors
황성주
SCOPUS Author ID
황성주scopus
Issue Date
2012
Journal Title
Journal of Physics and Chemistry of Solids
ISSN
0022-3697JCR Link
Citation
vol. 73, no. 12, pp. 1444 - 1447
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Two-dimensional (2D) Li 4Ti 5O 12 nanosheets with cubic spinel structure are synthesized via a lithiation process of exfoliated titanate 2D nanosheets and the subsequent heat-treatment at elevated temperatures. According to powder X-ray diffraction and field emission-scanning electron microscopy analysis, the obtained lithium titanium oxides show well-developed Bragg reflections of cubic spinel-structured Li 4Ti 5O 12 phase and highly anisotropic 2D plate-like morphology. Ti K-edge X-ray absorption near-edge structure analysis reveals the stabilization of tetravalent titanium ions in the cubic spinel lattice of Li 4Ti 5O 12. The 2D nanostructured Li 4Ti 5O 12 materials display the electrochemical functionality as negative electrode for lithium secondary batteries. The most promising electrode performance is achieved by the heat-treatment of the lithiated titanate at 600 °C, highlighting the importance of heating temperature in optimizing the electrochemical property of the resulting materials. © 2012 ElsevierLtd.Allrightsreserved.
DOI
10.1016/j.jpcs.2011.10.044
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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