Ceramics International, volume 47, issue 16, pages 22768-22775
Phase transformation and grain-boundary segregation in Al-Doped Li7La3Zr2O12 ceramics
Libin Zhuang
,
Xiao Huang
,
Yang Lu
1
,
Jiawen Tang
,
Youlian Zhou
,
Xin Ao
,
Yan Yang
2
,
Bingbing Tian
Publication type: Journal Article
Publication date: 2021-08-01
Journal:
Ceramics International
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 5.2
ISSN: 02728842
Materials Chemistry
Surfaces, Coatings and Films
Ceramics and Composites
Electronic, Optical and Magnetic Materials
Process Chemistry and Technology
Abstract
Cubic phase garnet-type Li 7 La 3 Zr 2 O 12 (LLZO) is a promising solid electrolyte for highly safe Li-ion batteries. Al-doped LLZO (Al-LLZO) has been widely studied due to the low cost of Al 2 O 3 . The reported ionic conductivities were variable due to the complicated Al 3+ -Li + substitution and Li x AlO y segregation in Al-LLZO ceramics. This work prepared Li 7−3 x Al x La 3 Zr 2 O 12 ( x = 0.00~0.40) ceramics via a conventional solid-state reaction method. The AC impedance and corresponding distribution of relaxation times (DRT) were analyzed combined with phase transformation, cross-sectional microstructure evolution, and grain boundary element mapping results for these Al-LLZO ceramics to understand the various ionic transportation levels in LLZO with different Al-doping amounts. The low conductivity in low Al-doped (0.12~0.28) LLZO originates from the slow Li + ion migration (1.4~0.25 μs) in the cubic-tetragonal mixed phase. On the other hand, LiAlO 2 and LaAlO 3 segregation occur at the grain boundaries of high Al-doped (0.40) LLZO, resulting in a gradual Li + ion jump (6.5 μs) over grain boundaries and low ionic conductivity. The Li 6.04 Al 0.32 La 3 Zr 2 O 12 ceramic delivers the optimum Li + ion conductivity of 1.7 × 10 −4 S cm −1 at 25 °C.
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- We do not take into account publications without a DOI.
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Zhuang L. et al. Phase transformation and grain-boundary segregation in Al-Doped Li7La3Zr2O12 ceramics // Ceramics International. 2021. Vol. 47. No. 16. pp. 22768-22775.
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Zhuang L., Huang X., Lu Y., Tang J., Zhou Y., Ao X., Yang Y., Tian B. Phase transformation and grain-boundary segregation in Al-Doped Li7La3Zr2O12 ceramics // Ceramics International. 2021. Vol. 47. No. 16. pp. 22768-22775.
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TY - JOUR
DO - 10.1016/j.ceramint.2021.04.295
UR - https://doi.org/10.1016/j.ceramint.2021.04.295
TI - Phase transformation and grain-boundary segregation in Al-Doped Li7La3Zr2O12 ceramics
T2 - Ceramics International
AU - Zhuang, Libin
AU - Huang, Xiao
AU - Lu, Yang
AU - Tang, Jiawen
AU - Zhou, Youlian
AU - Ao, Xin
AU - Yang, Yan
AU - Tian, Bingbing
PY - 2021
DA - 2021/08/01 00:00:00
PB - Elsevier
SP - 22768-22775
IS - 16
VL - 47
SN - 0272-8842
ER -
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@article{2021_Zhuang,
author = {Libin Zhuang and Xiao Huang and Yang Lu and Jiawen Tang and Youlian Zhou and Xin Ao and Yan Yang and Bingbing Tian},
title = {Phase transformation and grain-boundary segregation in Al-Doped Li7La3Zr2O12 ceramics},
journal = {Ceramics International},
year = {2021},
volume = {47},
publisher = {Elsevier},
month = {aug},
url = {https://doi.org/10.1016/j.ceramint.2021.04.295},
number = {16},
pages = {22768--22775},
doi = {10.1016/j.ceramint.2021.04.295}
}
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Zhuang, Libin, et al. “Phase transformation and grain-boundary segregation in Al-Doped Li7La3Zr2O12 ceramics.” Ceramics International, vol. 47, no. 16, Aug. 2021, pp. 22768-22775. https://doi.org/10.1016/j.ceramint.2021.04.295.