Crystal and electronic structure of lithiated nanosized rutile TiO2 by electron diffraction and electron energy-loss spectroscopy

Wang, C. M.; Yang, Z. G.; Thevuthasan, S.; Liu, J.; Baer, D. R.; Choi, D.; Wang, D. H.; Zhang, J. G.; Saraf, L. V.; Nie, Z. M.
June 2009
Applied Physics Letters;6/8/2009, Vol. 94 Issue 23, p233116
Academic Journal
The crystal and electronic structure of the lithiated nanosized rutile TiO2 were studied using electron diffraction and electron energy-loss spectroscopy (EELS) in a transmission electron microscopy. EELS reveals the Li K-edge at the energy-loss position of ∼61 eV. After lithiation, the t2g-eg crystal-field splitting on both Ti L2,3-edge and O K-edge decreases, the O K-edge shifts toward a higher energy-loss position and the separation between the pre-edge peak and main peak on the O K-edge decreases, suggesting that the lithiation of rutile TiO2 was accompanied by the reduction in Ti ion, indicating a charge transfer from Li to Ti.


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