Structure peculiarities of carbon-coated lithium titanate: Raman spectroscopy and electron microscopic study

Structure peculiarities of carbon-coated lithium titanate: Raman spectroscopy and electron microscopic study

Li 4Ti 4.92(CrV) 0.04O 12/C composites were synthesized at 800 °C under a flow of argon/acetylene gas mixture taken in the 40:1volumetric ratio. X-ray diffraction (XRD), thermogravimetric analysis (TGA), magnetic susceptibility, Raman spectroscopy, and electron microscopy (TEM) were used to characte...

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Bibliographic Details
Published in:Solid state sciences Vol. 14; no. 1; pp. 72 - 79
Main Authors: Kellerman, D.G., Gorshkov, V.S., Shalaeva, E.V., Tsaryev, B.A., Vovkotrub, E.G.
Format: Journal Article
Language:English
Published: Elsevier Masson SAS 2012
Subjects:
Carbon
Carbon coating
Conductivity
Defects ordering
Diffraction
Electron microscopy
Lithium
Lithium titanate
Raman scattering
Raman spectroscopy
Spinel
Thermogravimetric analysis
Titanates
Conductivity
Lithium titanate
Defects ordering
Electron microscopy
Raman scattering
Carbon coating
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Summary:Li 4Ti 4.92(CrV) 0.04O 12/C composites were synthesized at 800 °C under a flow of argon/acetylene gas mixture taken in the 40:1volumetric ratio. X-ray diffraction (XRD), thermogravimetric analysis (TGA), magnetic susceptibility, Raman spectroscopy, and electron microscopy (TEM) were used to characterize the phase structure, composition, and morphology of the composites. Transmission electron microscopy and Raman spectroscopy confirmed that carbon exists on the surface of the spinel matrix. The composites proved to have a modified structure in comparison with the pristine spinel phase. [Display omitted] ► Li 4Ti 5O 12/C composites were synthesized under a flow of argon/acetylene. ► The carbonization proved to lead to modification of the matrix spinel structure. ► Structure of the modified phase is considered as an ordered NaCl one. ► Raman spectra give evidence of lithium ions redistribution.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1293-2558
1873-3085
DOI:10.1016/j.solidstatesciences.2011.10.018