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@ARTICLE{Tsai:205134,
author = {Tsai, Chih-Long and Dashjav, Enkhtsetseg and Hammer,
Eva-Maria and Finsterbusch, Martin and Tietz, Frank and
Uhlenbruck, Sven and Buchkremer, Hans Peter},
title = {{H}igh conductivity of mixed phase {A}l-substituted
{L}i$_{7}${L}a$_{3}${Z}r$_{2}${O}$_{12}$},
journal = {Journal of electroceramics},
volume = {35},
number = {1-4},
issn = {1385-3449},
address = {Dordrecht [u.a.]},
publisher = {Springer Science + Business Media B.V},
reportid = {FZJ-2015-05599},
pages = {25-32},
year = {2015},
abstract = {Al-substituted Li7La3Zr2O12 (LLZ:Al) was synthesized via
conventional solid state reaction. Different dwell times at
sintering temperature of 1200 °C led to a varying Li
content in LLZ:Al which significantly affected the Li-ion
conductivity. Electrochemical impedance spectroscopy and
X-ray diffraction were used to characterize the sintered
pellets which showed a maximum total ionic conductivity of
~3 × 10−4 S cm−1 at room temperature although the
samples were composed of cubic and tetragonal LLZ:Al, with
the tetragonal phase as its major phase. Inductively coupled
plasma optical emission spectroscopy revealed that the Li
content steadily decreased from 7.5 to 6.5 Li per formula
unit with increasing sintering time. The highest
conductivity was observed from the sample with the lowest Li
concentration at 6.5 per formula unit. Scanning electron
microscopy images revealed the formation of large grains,
about 500 μm in diameter, which additionally could be the
reason for achieving high total Li-ion conductivity.
Electrochemical tests showed that mixed phase LLZ:Al is
stable against metallic Li up to 8 V.},
cin = {IEK-1},
ddc = {620},
cid = {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:000366155900004},
doi = {10.1007/s10832-015-9988-7},
url = {https://juser.fz-juelich.de/record/205134},
}