El-Shinawi, H. orcid.org/0000-0002-4743-5576, Cussen, E.J. orcid.org/0000-0002-2899-6888 and Corr, S.A. orcid.org/0000-0002-9303-4220 (2017) Enhancement of the lithium ion conductivity of Ta-doped Li7La3Zr2O12 by incorporation of calcium. Dalton Transactions, 46 (29). pp. 9415-9419. ISSN 1477-9226
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-xTaxO12phases. 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 Li6.4La3Zr1.4Ta0.6O12is 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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 The Royal Society of Chemistry. This is an open access article distributed under the Creative Commons Attribution License CC-BY 3.0 (https://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Chemical and Biological Engineering (Sheffield) The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 02 Jul 2019 14:30 |
Last Modified: | 02 Jul 2019 15:50 |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Refereed: | Yes |
Identification Number: | 10.1039/c7dt01573a |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:147661 |