ACS applied materials & interfaces, volume 8, issue 12, pages 7843-7853

Insights into the Performance Limits of the Li7P3S11 Superionic Conductor: A Combined First-Principles and Experimental Study.

Publication typeJournal Article
Publication date2016-03-17
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor9.5
ISSN19448244, 19448252
General Materials Science
Abstract
The Li7P3S11 glass-ceramic is a promising superionic conductor electrolyte (SCE) with an extremely high Li(+) conductivity that exceeds that of even traditional organic electrolytes. In this work, we present a combined computational and experimental investigation of the material performance limitations in terms of its phase and electrochemical stability, and Li(+) conductivity. We find that Li7P3S11 is metastable at 0 K but becomes stable at above 630 K (∼360 °C) when vibrational entropy contributions are accounted for, in agreement with differential scanning calorimetry measurements. Both scanning electron microscopy and the calculated Wulff shape show that Li7P3S11 tends to form relatively isotropic crystals. In terms of electrochemical stability, first-principles calculations predict that, unlike the LiCoO2 cathode, the olivine LiFePO4 and spinel LiMn2O4 cathodes are likely to form stable passivation interfaces with the Li7P3S11 SCE. This finding underscores the importance of considering multicomponent integration in developing an all-solid-state architecture. To probe the fundamental limit of its bulk Li(+) conductivity, a comparison of conventional cold-press sintered versus spark-plasma sintering (SPS) Li7P3S11 was done in conjunction with ab initio molecular dynamics (AIMD) simulations. Though the measured diffusion activation barriers are in excellent agreement, the AIMD-predicted room-temperature Li(+) conductivity of 57 mS cm(-1) is much higher than the experimental values. The optimized SPS sample exhibits a room-temperature Li(+) conductivity of 11.6 mS cm(-1), significantly higher than that of the cold-pressed sample (1.3 mS cm(-1)) due to the reduction of grain boundary resistance by densification. We conclude that grain boundary conductivity is limiting the overall Li(+) conductivity in Li7P3S11, and further optimization of overall conductivities should be possible. Finally, we show that Li(+) motions in this material are highly collective, and the flexing of the P2S7 ditetrahedra facilitates fast Li(+) diffusion.

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Chu I. et al. Insights into the Performance Limits of the Li7P3S11 Superionic Conductor: A Combined First-Principles and Experimental Study. // ACS applied materials & interfaces. 2016. Vol. 8. No. 12. pp. 7843-7853.
GOST all authors (up to 50) Copy
Chu I., Nguyen H., Hy S., Lin Y., Wang Z., Xu Z., Deng Z., Meng Y., Ong S. P. Insights into the Performance Limits of the Li7P3S11 Superionic Conductor: A Combined First-Principles and Experimental Study. // ACS applied materials & interfaces. 2016. Vol. 8. No. 12. pp. 7843-7853.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1021/acsami.6b00833
UR - https://doi.org/10.1021/acsami.6b00833
TI - Insights into the Performance Limits of the Li7P3S11 Superionic Conductor: A Combined First-Principles and Experimental Study.
T2 - ACS applied materials & interfaces
AU - Nguyen, Han
AU - Hy, Sunny
AU - Chu, Iek-Heng
AU - Lin, Yuh-Chieh
AU - Wang, Zhenbin
AU - Xu, Zihan
AU - Deng, Zhi
AU - Meng, Ying
AU - Ong, Shyue Ping
PY - 2016
DA - 2016/03/17 00:00:00
PB - American Chemical Society (ACS)
SP - 7843-7853
IS - 12
VL - 8
SN - 1944-8244
SN - 1944-8252
ER -
BibTex |
Cite this
BibTex Copy
@article{2016_Chu,
author = {Han Nguyen and Sunny Hy and Iek-Heng Chu and Yuh-Chieh Lin and Zhenbin Wang and Zihan Xu and Zhi Deng and Ying Meng and Shyue Ping Ong},
title = {Insights into the Performance Limits of the Li7P3S11 Superionic Conductor: A Combined First-Principles and Experimental Study.},
journal = {ACS applied materials & interfaces},
year = {2016},
volume = {8},
publisher = {American Chemical Society (ACS)},
month = {mar},
url = {https://doi.org/10.1021/acsami.6b00833},
number = {12},
pages = {7843--7853},
doi = {10.1021/acsami.6b00833}
}
MLA
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MLA Copy
Chu, Iek-Heng, et al. “Insights into the Performance Limits of the Li7P3S11 Superionic Conductor: A Combined First-Principles and Experimental Study..” ACS applied materials & interfaces, vol. 8, no. 12, Mar. 2016, pp. 7843-7853. https://doi.org/10.1021/acsami.6b00833.
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