Home > Publications database > Simultaneously improving sodium ionic conductivity and dendrite behavior of NaSICON ceramics by grain-boundary modification > print

001     1032626
005     20250203133241.0
024 7 _ |a 10.1016/j.jpowsour.2024.235773
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024 7 _ |a 0378-7753
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024 7 _ |a 1873-2755
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024 7 _ |a 10.34734/FZJ-2024-06392
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100 1 _ |a Liu, Limin
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245 _ _ |a Simultaneously improving sodium ionic conductivity and dendrite behavior of NaSICON ceramics by grain-boundary modification
260 _ _ |a New York, NY [u.a.]
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520 _ _ |a 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.
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536 _ _ |a DFG project G:(GEPRIS)390874152 - EXC 2154: POLiS - Post Lithium Storage Cluster of Excellence (390874152)
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700 1 _ |a Ma, Qianli
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700 1 _ |a Zhou, Xiaoliang
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700 1 _ |a Ding, Ziming
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700 1 _ |a Grüner, Daniel
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700 1 _ |a Kübel, Christian
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700 1 _ |a Tietz, Frank
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773 _ _ |a 10.1016/j.jpowsour.2024.235773
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856 4 _ |u https://juser.fz-juelich.de/record/1032626/files/1-s2.0-S0378775324017257-main.pdf
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