Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 16, Issue 6, Pages 2515-2526Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp55132f
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Funding
- National Sciences and Engineering Research Council of Canada (NSERC)
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Garnet-like solid-state electrolyte materials for lithium ion batteries are promising replacements for the currently-used liquid electrolytes. This work compares the temperature dependent Li+ ion hopping rate in Li6BaLa2M2O12 (M = Ta, Nb) using solid-state Li-6{Li-7}-REDOR NMR. The slope of the Li-6{Li-7}-REDOR curve is highly temperature dependent in these two phases, and a comparison of the changes of the REDOR slopes as a function of temperature has been used to evaluate the Li+ ion dynamics. Our results indicate that the Nb phase has a higher overall ionic conductivity in the range of 247 K to 350 K, as well as a higher activation energy for lithium ion hopping than the Ta counterpart. For appropriate relative timescales of the dipolar couplings and ion transport processes, this is shown to be a facile method to compare ion dynamics among similar structures.
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