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Identification of dopant site and its effect on electrochemical activity in Mn-doped Lithium Titanate

Published

Author(s)

Harischchandra Singh, Mehmet Topsakal, Klaus Attenkofer, Tamar Wolf, Michal Leskes, Yandong Duan, Feng Wang, John Vinson, Deyu Lu, Anatoly Frenkel

Abstract

We observed significant battery rate performance drop of nearly 20% in 1% Mn doped Lithium Titanate (LTO) compared to the pristine LTO. Using a combination of the X-ray absorption near edge structure experiment with theoretical modeling we demonstrated that the dopant Mn+2 ions reside on tetrahedral (8a) sites. As a result, Li migration through the LTO lattice during the battery charge- discharge process is impeded, which explains the decrease in electrochemical performance of the Mn doped LTO.
Citation
Physical Review Materials
Volume
2

Citation

Singh, H. , Topsakal, M. , Attenkofer, K. , Wolf, T. , Leskes, M. , Duan, Y. , Wang, F. , Vinson, J. , Lu, D. and Frenkel, A. (2018), Identification of dopant site and its effect on electrochemical activity in Mn-doped Lithium Titanate, Physical Review Materials, [online], https://doi.org/10.1103/PhysRevMaterials.2.125403, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=926480 (Accessed March 4, 2024)
Created December 19, 2018, Updated October 12, 2021