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Frontiers in Chemistry, volume 10

Engineered interfaces between perovskite La2/3xLi3xTiO3 electrolyte and Li metal for solid-state batteries

Shuo Yan 1
Hilal Al Salih 1
Chae-Ho Yim 2
Ali Merati 2
Elena A. Baranova 1
Arnaud Weck 3
Yaser Abu-Lebdeh 2
1
 
Department of Chemical and Biological Engineering, Canada
2
 
National Research Council of Canada, Canada
3
 
Department of Mechanical Engineering, Canada
Publication typeJournal Article
Publication date2022-08-10
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor5.5
ISSN22962646, 22962646
General Chemistry
Abstract

Perovskite La2/3xLi3xTiO3 (LLTO) materials are promising solid-state electrolytes for lithium metal batteries (LMBs) due to their intrinsic fire-resistance, high bulk ionic conductivity, and wide electrochemical window. However, their commercialization is hampered by high interfacial resistance, dendrite formation, and instability against Li metal. To address these challenges, we first prepared highly dense LLTO pellets with enhanced microstructure and high bulk ionic conductivity of 2.1×104 S cm−1 at room temperature. Then, the LLTO pellets were coated with three polymer-based interfacial layers, including pure (polyethylene oxide) (PEO), dry polymer electrolyte of PEO-LITFSI (lithium bis (trifluoromethanesulfonyl) imide) (PL), and gel PEO-LiTFSI-SN (succinonitrile) (PLS). It is found that each layer has impacted the interface differently; the soft PLS gel layer significantly reduced the total resistance of LLTO to a low value of 84.88 Ω cm−2. Interestingly, PLS layer has shown excellent ionic conductivity but performs inferior in symmetric Li cells. On the other hand, the PL layer significantly reduces lithium nucleation overpotential and shows a stable voltage profile after 20 cycles without any sign of Li dendrite formation. This work demonstrates that LLTO electrolytes with denser microstructure could reduce the interfacial resistance and when combined with polymeric interfaces show improved chemical stability against Li metal.

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Multidisciplinary Digital Publishing Institute (MDPI)
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Yan S. et al. Engineered interfaces between perovskite La2/3xLi3xTiO3 electrolyte and Li metal for solid-state batteries // Frontiers in Chemistry. 2022. Vol. 10.
GOST all authors (up to 50) Copy
Yan S., Al Salih H., Yim C., Merati A., Baranova E. A., Weck A., Abu-Lebdeh Y. Engineered interfaces between perovskite La2/3xLi3xTiO3 electrolyte and Li metal for solid-state batteries // Frontiers in Chemistry. 2022. Vol. 10.
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TY - JOUR
DO - 10.3389/fchem.2022.966274
UR - https://doi.org/10.3389/fchem.2022.966274
TI - Engineered interfaces between perovskite La2/3xLi3xTiO3 electrolyte and Li metal for solid-state batteries
T2 - Frontiers in Chemistry
AU - Yan, Shuo
AU - Al Salih, Hilal
AU - Yim, Chae-Ho
AU - Merati, Ali
AU - Baranova, Elena A.
AU - Weck, Arnaud
AU - Abu-Lebdeh, Yaser
PY - 2022
DA - 2022/08/10 00:00:00
PB - Frontiers Media S.A.
VL - 10
SN - 2296-2646
SN - 2296-2646
ER -
BibTex
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BibTex Copy
@article{2022_Yan,
author = {Shuo Yan and Hilal Al Salih and Chae-Ho Yim and Ali Merati and Elena A. Baranova and Arnaud Weck and Yaser Abu-Lebdeh},
title = {Engineered interfaces between perovskite La2/3xLi3xTiO3 electrolyte and Li metal for solid-state batteries},
journal = {Frontiers in Chemistry},
year = {2022},
volume = {10},
publisher = {Frontiers Media S.A.},
month = {aug},
url = {https://doi.org/10.3389/fchem.2022.966274},
doi = {10.3389/fchem.2022.966274}
}
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