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@ARTICLE{Liu:1032626,
author = {Liu, Limin and Ma, Qianli and Zhou, Xiaoliang and Ding,
Ziming and Grüner, Daniel and Kübel, Christian and Tietz,
Frank},
title = {{S}imultaneously improving sodium ionic conductivity and
dendrite behavior of {N}a{SICON} ceramics by grain-boundary
modification},
journal = {Journal of power sources},
volume = {626},
issn = {0378-7753},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2024-06392},
pages = {235773 -},
year = {2025},
abstract = {Developing highly conductive and reliable
solid-electrolytes (SEs) is still important for the
advancement of solid-statesodium batteries. NaSICON-type
polycrystalline SEs exhibit the dominance of grain-boundary
resistance tothe total resistance, which is mainly due to
the thermal expansion anisotropy of NaSICON-type lattices.
In thisstudy, we modify the grain boundaries of NaSICON-type
Na3.4Zr2Si2.4P0.6O12 (NZSP) by adding 2.5 $mol\%Na3LaP2O8$
(NLP) to counteract the effect of thermal expansion
anisotropy. NLP does not serve as a sintering aidfor NZSP
because the sintering temperature and relative density of
NZSP is not changed. The total conductivity ofmodified NZSP
increases to 7.1 mS cm 1 at 25 ◦C, surpassing other
reported polycrystalline oxide SEs. Thecritical current
density of Na | modified NZSP | Na symmetric cells increases
to 22 mA cm 2. The cells cansurvive under long-term
galvanostatic cycling up to 10 mA cm 2, indicating the
unprecedented dendrite tolerance.Remarkably, the main
failure mode in these cells shifts from Na-dendrite
short-circuiting to the loop ofsubstantial polarizations and
short-circuits.},
cin = {IMD-2 / IMD-1},
ddc = {620},
cid = {I:(DE-Juel1)IMD-2-20101013 / I:(DE-Juel1)IMD-1-20101013},
pnm = {1221 - Fundamentals and Materials (POF4-122) / 1222 -
Components and Cells (POF4-122) / DFG project
G:(GEPRIS)390874152 - EXC 2154: POLiS - Post Lithium Storage
Cluster of Excellence (390874152)},
pid = {G:(DE-HGF)POF4-1221 / G:(DE-HGF)POF4-1222 /
G:(GEPRIS)390874152},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001359959700001},
doi = {10.1016/j.jpowsour.2024.235773},
url = {https://juser.fz-juelich.de/record/1032626},
}