Journal of the American Chemical Society, volume 144, issue 22, pages 9597-9609
Ionic Conductivity of Nanocrystalline and Amorphous Li10GeP2S12: The Detrimental Impact of Local Disorder on Ion Transport
Lukas Schweiger
1
,
Katharina Hogrefe
1
,
B. Gadermaier
1
,
Jennifer L. Rupp
2, 3
,
Martin Wilkening
1
Publication type: Journal Article
Publication date: 2022-05-24
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 15
ISSN: 00027863, 15205126
General Chemistry
Catalysis
Biochemistry
Colloid and Surface Chemistry
Abstract
Solids with extraordinarily high Li+ dynamics are key for high performance all-solid-state batteries. The thiophosphate Li10GeP2S12 (LGPS) belongs to the best Li-ion conductors with an ionic conductivity exceeding 10 mS cm-1 at ambient temperature. Recent molecular dynamics simulations performed by Dawson and Islam predict that the ionic conductivity of LGPS can be further enhanced by a factor of 3 if local disorder is introduced. As yet, no experimental evidence exists supporting this fascinating prediction. Here, we synthesized nanocrystalline LGPS by high-energy ball-milling and probed the Li+ ion transport parameters. Broadband conductivity spectroscopy in combination with electric modulus measurements allowed us to precisely follow the changes in Li+ dynamics. Surprisingly and against the behavior of other electrolytes, bulk ionic conductivity turned out to decrease with increasing milling time, finally leading to a reduction of σ20°C by a factor of 10. 31P, 6Li NMR, and X-ray diffraction showed that ball-milling forms a structurally heterogeneous sample with nm-sized LGPS crystallites and amorphous material. At -135 °C, electrical relaxation in the amorphous regions is by 2 to 3 orders of magnitude slower. Careful separation of the amorphous and (nano)crystalline contributions to overall ion transport revealed that in both regions, Li+ ion dynamics is slowed down compared to untreated LGPS. Hence, introducing defects into the LGPS bulk structure via ball-milling has a negative impact on ionic transport. We postulate that such a kind of structural disorder is detrimental to fast ion transport in materials whose transport properties rely on crystallographically well-defined diffusion pathways.
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1
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Citations by publishers
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1 publication, 2.86%
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1 publication, 2.86%
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Cambridge University Press
1 publication, 2.86%
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1 publication, 2.86%
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1 publication, 2.86%
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1 publication, 2.86%
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1 publication, 2.86%
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2
4
6
8
10
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Schweiger L. et al. Ionic Conductivity of Nanocrystalline and Amorphous Li10GeP2S12: The Detrimental Impact of Local Disorder on Ion Transport // Journal of the American Chemical Society. 2022. Vol. 144. No. 22. pp. 9597-9609.
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Schweiger L., Hogrefe K., Gadermaier B., Rupp J. L., Wilkening M. Ionic Conductivity of Nanocrystalline and Amorphous Li10GeP2S12: The Detrimental Impact of Local Disorder on Ion Transport // Journal of the American Chemical Society. 2022. Vol. 144. No. 22. pp. 9597-9609.
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TY - JOUR
DO - 10.1021/jacs.1c13477
UR - https://doi.org/10.1021/jacs.1c13477
TI - Ionic Conductivity of Nanocrystalline and Amorphous Li10GeP2S12: The Detrimental Impact of Local Disorder on Ion Transport
T2 - Journal of the American Chemical Society
AU - Schweiger, Lukas
AU - Hogrefe, Katharina
AU - Gadermaier, B.
AU - Rupp, Jennifer L.
AU - Wilkening, Martin
PY - 2022
DA - 2022/05/24 00:00:00
PB - American Chemical Society (ACS)
SP - 9597-9609
IS - 22
VL - 144
SN - 0002-7863
SN - 1520-5126
ER -
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@article{2022_Schweiger,
author = {Lukas Schweiger and Katharina Hogrefe and B. Gadermaier and Jennifer L. Rupp and Martin Wilkening},
title = {Ionic Conductivity of Nanocrystalline and Amorphous Li10GeP2S12: The Detrimental Impact of Local Disorder on Ion Transport},
journal = {Journal of the American Chemical Society},
year = {2022},
volume = {144},
publisher = {American Chemical Society (ACS)},
month = {may},
url = {https://doi.org/10.1021/jacs.1c13477},
number = {22},
pages = {9597--9609},
doi = {10.1021/jacs.1c13477}
}
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MLA
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Schweiger, Lukas, et al. “Ionic Conductivity of Nanocrystalline and Amorphous Li10GeP2S12: The Detrimental Impact of Local Disorder on Ion Transport.” Journal of the American Chemical Society, vol. 144, no. 22, May. 2022, pp. 9597-9609. https://doi.org/10.1021/jacs.1c13477.