Structural and electronic properties of the spinel Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>

  • Sarantuya Lkhagvajav Institute of Physics and Technology, Mongolian Academy of Sciences, Ulaanbaatar 13330, Mongolia https://orcid.org/0000-0001-7508-5326
  • Namsrai Tsogbadrakh Department of Physics, National University of Mongolia, Ulaanbaatar 14201, Mongolia
  • Enkhjargal Enkhbayar Institute of Physics and Technology, Mongolian Academy of Sciences, Ulaanbaatar 13330, Mongolia
  • Sevjidsuren Galsan Institute of Physics and Technology, Mongolian Academy of Sciences, Ulaanbaatar 13330, Mongolia
  • Pagvajav Altantsog Institute of Physics and Technology, Mongolian Academy of Sciences, Ulaanbaatar 13330, Mongolia
Keywords: Spinel, Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>, DFT, GGA U, X-ray diffraction, UV-visible

Abstract

In this study, the structure and electronic properties of the spinel compound Li4Ti5O12 (LTO) are investigated both theoretical and experimental methods. The experimental studies of structural and electronic properties were performed by X-ray
diffraction and UV-visible spectroscopy. The first principles calculations allowed to establish the relationship between the structure and electronic properties. The spinel type structure of LTO is refined by the Rietveld analysis using the X-ray
diffraction (XRD). The band gap of LTO was determined to be 3.55 eV using the UV-visible absorption spectra. The Density
functional theory (DFT) augmented without and with the Hubbard U correction (GGA and GGA +U+J0) is used to elucidate the electronic structure of LTO. We have performed systematic studies of the first principles calculations based on the
GGA and GGA+U for the crystal structure and electronic properties of spinel LTO. We propose that a Hubbard U correction improves the DFT results.

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Abstract
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Published
2019-12-27
How to Cite
Lkhagvajav, S., Tsogbadrakh, N., Enkhbayar, E., Galsan, S., & Altantsog, P. (2019). Structural and electronic properties of the spinel Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub&gt;. Mongolian Journal of Chemistry, 20(46), 7-12. https://doi.org/10.5564/mjc.v20i46.1236
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