Journal of the American Chemical Society, volume 141, issue 48, pages 19002-19013

New Family of Argyrodite Thioantimonate Lithium Superionic Conductors

Publication typeJournal Article
Publication date2019-10-23
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor15
ISSN00027863, 15205126
General Chemistry
Catalysis
Biochemistry
Colloid and Surface Chemistry
Abstract
We report on a new family of argyrodite lithium superionic conductors, as solid solutions Li6+xMxSb1-xS5I (M = Si, Ge, Sn), that exhibit superionic conductivity. These represent the first antimony argyrodites to date. Exploration of the series using a combination of single crystal X-ray and synchrotron/neutron powder diffraction, combined with impedance spectroscopy, reveals that an optimal degree of substitution (x), and substituent induces slight S2-/I- anion site disorder-but more importantly drives Li+ cation site disorder. The additional, delocalized Li-ion density is located in new high energy lattice sites that provide intermediate interstitial positions (local minima) for Li+ diffusion and activate concerted ion migration, leading to a low activation energy of 0.25 eV. Excellent room temperature ionic conductivity of 14.8 mS·cm-1 is exhibited for cold-pressed pellets-up to 24 mS·cm-1 for sintered pellets-among the highest values reported to date. This enables all-solid-state battery prototypes that exhibit promising properties. Furthermore, even at -78 °C, suitable bulk ionic conductivity of the electrolyte is retained (0.25 mS·cm-1). Selected thioantimonate iodides demonstrate good compatibility with Li metal, sustaining over 1000 h of Li stripping/plating at current densities up to 0.6 mA·cm-2. The significantly enhanced Li ion conduction and lowered activation energy barrier with increasing site disorder reveals an important strategy toward the development of superionic conductors.

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GOST |
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GOST Copy
Zhou L. et al. New Family of Argyrodite Thioantimonate Lithium Superionic Conductors // Journal of the American Chemical Society. 2019. Vol. 141. No. 48. pp. 19002-19013.
GOST all authors (up to 50) Copy
Zhou L., Assoud A., Singh V. K., Wu X., Nazar L. F. New Family of Argyrodite Thioantimonate Lithium Superionic Conductors // Journal of the American Chemical Society. 2019. Vol. 141. No. 48. pp. 19002-19013.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1021/jacs.9b08357
UR - https://doi.org/10.1021/jacs.9b08357
TI - New Family of Argyrodite Thioantimonate Lithium Superionic Conductors
T2 - Journal of the American Chemical Society
AU - Wu, Xiaohan
AU - Zhou, Laidong
AU - Nazar, Linda F.
AU - Assoud, Abdeljalil
AU - Singh, Vijay Kumar
PY - 2019
DA - 2019/10/23 00:00:00
PB - American Chemical Society (ACS)
SP - 19002-19013
IS - 48
VL - 141
SN - 0002-7863
SN - 1520-5126
ER -
BibTex |
Cite this
BibTex Copy
@article{2019_Zhou,
author = {Xiaohan Wu and Laidong Zhou and Linda F. Nazar and Abdeljalil Assoud and Vijay Kumar Singh},
title = {New Family of Argyrodite Thioantimonate Lithium Superionic Conductors},
journal = {Journal of the American Chemical Society},
year = {2019},
volume = {141},
publisher = {American Chemical Society (ACS)},
month = {oct},
url = {https://doi.org/10.1021/jacs.9b08357},
number = {48},
pages = {19002--19013},
doi = {10.1021/jacs.9b08357}
}
MLA
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MLA Copy
Zhou, Laidong, et al. “New Family of Argyrodite Thioantimonate Lithium Superionic Conductors.” Journal of the American Chemical Society, vol. 141, no. 48, Oct. 2019, pp. 19002-19013. https://doi.org/10.1021/jacs.9b08357.
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