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@INPROCEEDINGS{Lobe:255489,
author = {Lobe, Sandra and Tsai, Chih-Long and Finsterbusch, Martin
and Dellen, Christian and Uhlenbruck, Sven and Gehrke,
Hans-Gregor and Guillon, Olivier},
title = {{S}putter deposited {L}i7{L}a3{Z}r2{O}$_{12}$ as
electrolyte for thin film cells},
reportid = {FZJ-2015-05651},
year = {2015},
abstract = {Most commercial state-of-the-art batteries work with a
liquid organic electrolyte which might cause safety problems
due to an insufficient thermal and electrochemical
stability. Replacing the liquid by a solid electrolyte is
one approach to overcome these problems. Next to sulfides
and phosphates, oxide compounds like the garnet-structured
Li7La3Zr2O12 (LLZ) are promising materials for solid
electrolytes. LLZ exists in two modifications, a tetragonal
and a cubic, whereby the cubic high temperature phase shows
a higher Li-ion conductivity (about 10-4 S/cm). Further
advantageous properties of LLZ are its thermal (up to
1050°C) and electrochemical stability (up to 8V) which
allows its usage with high-voltage electrodes or in
batteries at elevated temperatures. Since the conductivity
is two orders of magnitude lower compared to organic
electrolytes the overall resistance can be lowered by
reduction to a thin electrolyte layer in all-solid-state
cells.R.f. magnetron sputter deposition is one approach to
coat large substrate areas with LLZ electrolyte. In order to
get crack-free, dense and single phase LLZ thin films,
deposition parameters need to be adjusted carefully, which
is shown by x-ray diffraction (XRD), secondary ion mass
spectroscopy (SIMS) and scanning electron microscopy (SEM).
In our study conductivities up to 10-6 S/cm are achieved for
single phase cubic thin films. Furthermore, LLZ thin films
were successfully integrated into all solid state cells,
which are also characterized.},
month = {Jun},
date = {2015-06-14},
organization = {20th International Conference on Solid
State Ionics, Keystone, CO (USA), 14
Jun 2015 - 19 Jun 2015},
cin = {IEK-1 / JARA-ENERGY},
cid = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
pnm = {131 - Electrochemical Storage (POF3-131) / HITEC -
Helmholtz Interdisciplinary Doctoral Training in Energy and
Climate Research (HITEC) (HITEC-20170406)},
pid = {G:(DE-HGF)POF3-131 / G:(DE-Juel1)HITEC-20170406},
typ = {PUB:(DE-HGF)1},
url = {https://juser.fz-juelich.de/record/255489},
}