The electronic structure of the nanosized rutile TiO2 before and after mechanical lithiation were studied using TEM and EELS. EELS reveals the Li K-edge at the energy-loss position of ~ 61 eV. After lithiation, the separation of the t2g-eg crystal-field splitting on both Ti L2,3-edge and O K-edge decreases, the O K-edge shifts towards a higher energy-loss position and the separation between the pre-edge peak and main peak on the O K-edge decreases. These results suggest that the lithiation of rutile TiO2 was accompanied by the reduction of Ti ion and a charge transfer from Li to Ti.
Revised: July 6, 2009 |
Published: June 11, 2009
Citation
Wang C.M., Z. Yang, S. Thevuthasan, J. Liu, D.R. Baer, D. Choi, and D. Wang, et al. 2009.Crystal and Electronic Structure of Lithiated Nanosized RutileTiO2 by Electron Diffraction and Electron Energy-loss Spectroscopy.Applied Physics Letters 94, no. 23:Art. No.: 233116.PNNL-SA-63617.doi:10.1063/1.3152783