El-Shinawi, H., Cussen, E. J. and Corr, S. A. (2017) Enhancement of the lithium ion conductivity of Ta-doped Li7La3Zr2O12 by incorporation of calcium. Dalton Transactions, 29(46), pp. 9415-9419. (doi: 10.1039/C7DT01573A)
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Abstract
Fast ion conducting garnet materials have been identified as promising electrolytes for all solid-state batteries. However, reliable synthetic routes to materials with fully elucidated cation site occupancies where an enhancement in lithium conductivity is observed remains a challenge. Ca-incorporation is developed here as a promising approach to enhance the ionic conductivity of garnet-type Li7-xLa3Zr2-xTaxO12 phases. Here we present a new sol-gel synthetic strategy as a facile route to the preparation of materials of a desired stoichiometry optimized for Li+ conductivity. We have found that the ionic conductivity of Li6.4La3Zr1.4Ta0.6O12 is increased by a factor of four by the addition of 0.2 mol of Ca per formula unit. Ca is incorporated in the garnet lattice where it has no effect on the sinterability of the material and is predominately located at the La sites. We anticipate that the ease of our synthetic route and the phases presented here represents a starting point for the further realization of solid state electrolyte compositions with similarly high Li+ conductivities using this methodology.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Corr, Professor Serena and El-Shinawi, Dr Hany |
| Authors: | El-Shinawi, H., Cussen, E. J., and Corr, S. A. |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Dalton Transactions |
| Publisher: | Royal Society of Chemistry |
| ISSN: | 1477-9226 |
| ISSN (Online): | 1477-9234 |
| Published Online: | 03 July 2017 |
| Copyright Holders: | Copyright © 2017 The Royal Society of Chemistry |
| First Published: | First published in Dalton Transactions 29(46):9415-9419 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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