Journal of Energy Chemistry, volume 73, pages 354-359
Revealing the dominant factor of domain boundary resistance on bulk conductivity in lanthanum lithium titanates
Xuefeng Zhou
1, 2
,
Cong Gao
1
,
Dandan Wang
1
,
Shang Peng
1
,
Lujun Huang
3
,
Wenge Yang
1
,
Wenhua Zhang
2, 4
,
Xiang Gao
1
2
Sichuan Research Center of New Materials, Institute of Chemical Materials, China Academy of Engineering Physics, Chengdu 610200, Sichuan, China
|
Publication type: Journal Article
Publication date: 2022-10-01
Journal:
Journal of Energy Chemistry
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 13.1
ISSN: 20954956
Electrochemistry
Energy Engineering and Power Technology
Fuel Technology
Energy (miscellaneous)
Abstract
The domain boundaries act as interface barriers to bulk ionic conductivity in La 2/3− x Li 3 x TiO 3 . Here we reveal for the first time the domain boundary structure plays a dominant role in determining the bulk conductivity, instead of domain boundary concentration. Perovskite-type lithium lanthanum titanates (LLTO) display a high bulk ionic conductivity and are considered a promising electrolyte for building up to advanced solid-state Li-ion batteries. The LLTO crystals contain a high concentration of intrinsically formed 90°-rotated domain boundaries (DBs) serving as barriers to bulk Li-ion conduction. However, the mechanism of how the DB concentration and DB resistance can compete with each other to determine the bulk conductivity of LLTO is still unknown. Here we report a comprehensive study of LLTO compounds, aimed to unravel the mechanism and hence explore new path(s) for further improving the conductivity of this material. Our results show that both the sintering temperature and chemical composition can affect significantly the domain structures in LLTO. It is found that a decrease in the DB concentration is always accompanied by increased DB resistance due to the increased lattice mismatch at DBs, and vice versa. By unifying the electrochemical impedance spectroscopy and transmission electron microscopy analysis, it is clearly shown that the high DB resistance, instead of DB concentration, acts as the dominant factor governing the bulk conductivity of LLTO. The results thus renew the conventional understanding of the bulk Li-ion conduction in LLTO and shed light on developing novel LLTO electrolyte materials with improved ionic conductivity.
Top-30
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Citations by publishers
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1
2
3
4
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Elsevier
4 publications, 40%
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American Chemical Society (ACS)
3 publications, 30%
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1 publication, 10%
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Multidisciplinary Digital Publishing Institute (MDPI)
1 publication, 10%
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Autonomous Non-profit Organization Editorial Board of the journal Uspekhi Khimii
1 publication, 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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Zhou X. et al. Revealing the dominant factor of domain boundary resistance on bulk conductivity in lanthanum lithium titanates // Journal of Energy Chemistry. 2022. Vol. 73. pp. 354-359.
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Zhou X., Gao C., Wang D., Peng S., Huang L., Yang W., Zhang W., Gao X. Revealing the dominant factor of domain boundary resistance on bulk conductivity in lanthanum lithium titanates // Journal of Energy Chemistry. 2022. Vol. 73. pp. 354-359.
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TY - JOUR
DO - 10.1016/j.jechem.2022.06.020
UR - https://doi.org/10.1016/j.jechem.2022.06.020
TI - Revealing the dominant factor of domain boundary resistance on bulk conductivity in lanthanum lithium titanates
T2 - Journal of Energy Chemistry
AU - Zhou, Xuefeng
AU - Gao, Cong
AU - Wang, Dandan
AU - Peng, Shang
AU - Huang, Lujun
AU - Yang, Wenge
AU - Zhang, Wenhua
AU - Gao, Xiang
PY - 2022
DA - 2022/10/01 00:00:00
PB - Elsevier
SP - 354-359
VL - 73
SN - 2095-4956
ER -
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@article{2022_Zhou,
author = {Xuefeng Zhou and Cong Gao and Dandan Wang and Shang Peng and Lujun Huang and Wenge Yang and Wenhua Zhang and Xiang Gao},
title = {Revealing the dominant factor of domain boundary resistance on bulk conductivity in lanthanum lithium titanates},
journal = {Journal of Energy Chemistry},
year = {2022},
volume = {73},
publisher = {Elsevier},
month = {oct},
url = {https://doi.org/10.1016/j.jechem.2022.06.020},
pages = {354--359},
doi = {10.1016/j.jechem.2022.06.020}
}
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