Challenges regarding thin film deposition of garnet electrolytes for all-solid-state lithium batteries with high energy density

Lobe, Sandra; Guillon, O.; Tsai, C.-L.; Windmüller, A.; Uhlenbruck, S.; Vondahlen, F.; Dellen, C.

doi:10.1007/s11581-018-2594-3

Journal Article

FZJ-2019-00939

Challenges regarding thin film deposition of garnet electrolytes for all-solid-state lithium batteries with high energy density

Lobe, S. (Corresponding author)FZJ* ; Dellen, C.FZJ* ; Windmüller, A.FZJ* ; Tsai, C.-L.FZJ* ; Vondahlen, F.FZJ* ; Uhlenbruck, S.FZJ* ; Guillon, O.FZJ*

2018
Springer Heidelberg

Ionics 24(8), 2199 - 2208 (2018) [10.1007/s11581-018-2594-3]

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Please use a persistent id in citations: doi:10.1007/s11581-018-2594-3

Abstract: In this work, we studied the deposition of garnet electrolyte thin films in order to realize an all-solid-state battery with high energy density. Therefore, in a first step we investigated the stability of the garnet Li5La3Ta2O12 with the spinel LiCoMnO4 in order to determine the temperature window for a successful thin film deposition on high-voltage spinels. A mixture of both materials showed a thermal stability up to 600 °C, so that all-solid-state batteries could be realized when the electrolyte is applied at a low deposition temperature. The second part of the work was the thin film deposition of Li5La3Ta2O12 by a sputter deposition process. When a stoichiometric Li5La3Ta2O12 sputter target was used, the surface of the target showed a depletion of lithium after several depositions, which leads to decreasing Li content in the thin films. In order to compensate the lithium loss we enriched the target with LiOH∙H

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