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@ARTICLE{Ye:877638,
author = {Ye, Ruijie and Tsai, Chih-Long and Ihrig, Martin and
Sevinc, Serkan and Rosen, Melanie and Dashjav, Enkhtsetseg
and Sohn, Yoo Jung and Figgemeier, Egbert and Finsterbusch,
Martin},
title = {{W}ater-based fabrication of garnet-based solid electrolyte
separators for solid-state lithium batteries},
journal = {Green chemistry},
volume = {22},
number = {15},
issn = {1463-9262},
address = {Cambridge},
publisher = {RSC},
reportid = {FZJ-2020-02353},
pages = {4952-4961},
year = {2020},
abstract = {Garnet-type Li7La3Zr2O12 (LLZ) is regarded as a promising
oxide-based solid electrolyte (SE) for solid-state lithium
batteries (SSLBs) or other advanced Li-battery concepts like
Li–air or Li–S batteries. A thin free-standing LLZ sheet
can be fabricated by tape-casting and used e.g. as
separators in SSLBs, since tape casting is an industrially
established process and enables large-scale production of
such SEs. However, organic solvents and additives employed
in conventional slurry recipes for tape-casting give rise to
health and safety concerns and also cause a high cost for
solvent recovery. Hence, development of a green, water-based
processing route can reduce both manufacturing costs and
environmental footprint. In this work, we developed a
tape-casting process for LLZ SEs using water as solvent, the
water-soluble biopolymer methylcellulose as binder and other
eco-friendly polymers as plasticizers. Although a Li+/H+
exchange takes place during our procedure, we demonstrate
that the Li+/H+ exchange reaction is reversible in our
procedure and results in the formation of stoichiometric
cubic LLZ at the end. The obtained free-standing LLZ sheets
with thickness of 150 μm and relative density of approx.
$90\%$ offer an ionic conductivity of 0.15 mS cm−1 at room
temperature. We thereby prove that it is feasible to use
water as dispersion medium and eco-friendly polymer
additives for the fabrication of thin garnet-based SE
layers.},
cin = {IEK-12 / IEK-1},
ddc = {540},
cid = {I:(DE-Juel1)IEK-12-20141217 / I:(DE-Juel1)IEK-1-20101013},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000555342200011},
doi = {10.1039/D0GC01009J},
url = {https://juser.fz-juelich.de/record/877638},
}