Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.solidstatesciences.2007.12.030
Title: Enhanced interfacial lithium storage in nanocomposites of transition metals with LiF and Li2O: Comparison of DFT calculations and experimental studies
Authors: Zhukovskii, Yu.F.
Kotomin, E.A.
Balaya, P. 
Maier, J.
Keywords: Ab initio calculations
Interfacial Li storage
Me/LiX nanocomposites
Issue Date: Apr-2008
Citation: Zhukovskii, Yu.F., Kotomin, E.A., Balaya, P., Maier, J. (2008-04). Enhanced interfacial lithium storage in nanocomposites of transition metals with LiF and Li2O: Comparison of DFT calculations and experimental studies. Solid State Sciences 10 (4) : 491-495. ScholarBank@NUS Repository. https://doi.org/10.1016/j.solidstatesciences.2007.12.030
Abstract: Me/LiX nanocomposites (Me - transition metal and X = F or O) exhibit extra lithium storage, with pseudo-capacitive behavior and high-rate performance. While LiX surface layers or the interfacial core serves as hosts for extra Li, atoms of contacting transition metal serve as electron sinks, depending on Me electronegativity. To verify the mechanism, we have performed comparative DFT-LCAO calculations on the polar Ti|Li|Li2O(111) and non-polar Cu|Li|LiF(001) interfaces with extra Li atoms inserted inside both 2D interfaces, gradually changing their concentration. Theoretical calculations confirm validity of this interfacial model for explanation of the extra storage capacity at low potentials. The diffusion barrier for extra Li atom along the Me/LiX interface is markedly smaller than the Li penetration barrier into the bulk. © 2007 Elsevier Masson SAS. All rights reserved.
Source Title: Solid State Sciences
URI: http://scholarbank.nus.edu.sg/handle/10635/85138
ISSN: 12932558
DOI: 10.1016/j.solidstatesciences.2007.12.030
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