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Nebulized spray pyrolysis of Al-doped Li7La3Zr2O12 solid electrolyte for battery applications

Djenadic, Ruzica and Botros, Miriam and Benel, Cahit and Clemens, Oliver and Indris, Sylvio and Choudhary, Ahmad and Bergfeldt, Thomas and Hahn, Horst (2014):
Nebulized spray pyrolysis of Al-doped Li7La3Zr2O12 solid electrolyte for battery applications.
In: Solid State Ionics, 263, pp. 49-56. Elsevier Science Publishing, ISSN 01672738,
[Article]

Abstract

Nebulized spray pyrolysis followed by consolidation and sintering was used for the first time to prepare Al-doped garnet-based Li7−3xLa3Zr2AlxO12 (x = 0–0.25) (LLZO) ultra-fine grained ceramics. The structural changes from the tetragonal (x = 0), via a mixture of the cubic and the tetragonal (x = 0.07, 0.10) to the cubic modification (x = 0.15–0.25) were observed. 27Al NMR study showed that aluminum occupy the tetrahedral 24d lithium sites. Despite their low relative density (47–56%), preliminary ionic conductivities of the LLZO ceramics, were found to be 1.2 · 10− 6 S cm− 1 and 4.4 · 10− 6 S cm− 1 for tetragonal and cubic LLZO at room temperature, with activation energies of 0.55 eV and 0.49 eV, respectively.

Item Type: Article
Erschienen: 2014
Creators: Djenadic, Ruzica and Botros, Miriam and Benel, Cahit and Clemens, Oliver and Indris, Sylvio and Choudhary, Ahmad and Bergfeldt, Thomas and Hahn, Horst
Title: Nebulized spray pyrolysis of Al-doped Li7La3Zr2O12 solid electrolyte for battery applications
Language: English
Abstract:

Nebulized spray pyrolysis followed by consolidation and sintering was used for the first time to prepare Al-doped garnet-based Li7−3xLa3Zr2AlxO12 (x = 0–0.25) (LLZO) ultra-fine grained ceramics. The structural changes from the tetragonal (x = 0), via a mixture of the cubic and the tetragonal (x = 0.07, 0.10) to the cubic modification (x = 0.15–0.25) were observed. 27Al NMR study showed that aluminum occupy the tetrahedral 24d lithium sites. Despite their low relative density (47–56%), preliminary ionic conductivities of the LLZO ceramics, were found to be 1.2 · 10− 6 S cm− 1 and 4.4 · 10− 6 S cm− 1 for tetragonal and cubic LLZO at room temperature, with activation energies of 0.55 eV and 0.49 eV, respectively.

Journal or Publication Title: Solid State Ionics
Journal volume: 263
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Solid electrolyte, Garnet, All-solid-state lithium battery, Ionic conductivity, Nanocrystalline, Doping
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Materialdesign durch Synthese
11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
Date Deposited: 16 Feb 2015 12:53
Official URL: http://dx.doi.org/10.1016/j.ssi.2014.05.007
Identification Number: doi:10.1016/j.ssi.2014.05.007
Funders: The authors would like to thank Helmholtz Association for the financial support., The support of the Karlsruhe Nano Micro Facility (KNMF) and the Helmholtz Portfolio Project “Electrochemical Storage in System - Reliability and Integration” is gratefully acknowledged.
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