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@INPROCEEDINGS{Dashjav:825081,
author = {Dashjav, Enkhtsetseg and Gellert, Michael and Ma, Qianli
and Grüner, Daniel and Pristat, Sylke and Tietz, Frank},
title = {{P}roperties of {L}i1.5{A}l0.5{T}i1.5({PO}4)3 sheets made
by tape casting},
reportid = {FZJ-2016-07561},
year = {2016},
abstract = {Tape casting is a well-established shaping technique for
ceramic materials and can be scaled up with existing
experience. Recently we started the preparation of dense
electrolyte sheets for Li-ion batteries. Sol-gel prepared
nano-sized powder of Li1.5Al0.5Ti1.5(PO4)3 [1] was
successfully tape-cast using the doctor blade method. Plain
sintered sheets with thicknesses between 50 µm and 150 µm
could be fabricated with a maximum size of 10 cm². The
densification and ionic conductivity at different sintering
temperatures were investigated by microstructural analysis
and impedance spectroscopy, respectively. The average total
ionic conductivity was in the range of 0.2 mS/cm, which is
still lower than powder pellets [1], but already twice as
good as commercially available glass-ceramics [2]. The
results show that the density and the microstructure are
very sensitive to sintering temperatures and dwell time. The
ionic conductivities and the sintered thicknesses are
presented in Table 1. The highest ionic conductivity of 0.3
mS/cm is achieved at 1000°C sintering temperature. The
parameters are actually under optimization with respect to
higher density, better homogeneity and reduced crack
formation. For the mechanical stability 4 point bending
strength tests were carried out on samples sintered at
900°C with dimensions of h = 150 µm, b = 1 cm, l = 5 cm
resulting in a modulus of elasticity of E = 67 GPa ±14 GPa,
and a specific fracture resistance σb = 62 MPa ±7 MPa. The
stability of these sheets is promising for further use in
any battery design with ceramic separator.},
month = {Nov},
date = {2016-11-23},
organization = {Bunsen-Kolloquium: Solid-State
Batteries II, Frankfurt/Main (Germany),
23 Nov 2016 - 25 Nov 2016},
subtyp = {After Call},
cin = {IEK-1},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)24},
url = {https://juser.fz-juelich.de/record/825081},
}