Ceramics International, volume 45, issue 12, pages 14991-14996

Overcoming the abnormal grain growth in Ga-doped Li7La3Zr2O12 to enhance the electrochemical stability against Li metal

Jianmeng Su 1
Xiao Huang 1
Zhen Song 2
Tongping Xiu 3
Michael E Badding 2
Jun Jin
Jun Jin 1
Z. Wen 1
Zhaoyin Wen
Publication typeJournal Article
Publication date2019-08-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor5.2
ISSN02728842
Materials Chemistry
Surfaces, Coatings and Films
Ceramics and Composites
Electronic, Optical and Magnetic Materials
Process Chemistry and Technology
Abstract
Li 7 La 3 Zr 2 O 12 (LLZO) solid electrolyte is a promising candidate for next generation batteries. In the LLZO family with various doping elements, Ga-doped LLZO (Ga-LLZO) delivers the highest Li-ion conductivity of higher than 1 × 10 −3  S cm −1 . However, Ga-LLZO ceramics always contain lots of overgrown huge grains after sintering, resulting in short-circuiting as applied with Li anode in batteries. Hence a simple two-step sintering strategy is developed to prepare fine-grained Ga-LLZO ceramics with good electrochemical properties. Pellets with the composition of Li 6.4 Ga 0.2 La 3 Zr 2 O 12 deliver pure garnet phase, uniform fine grains, high relative density of 97.3% and conductivity of 1.24 × 10 −3  S cm −1  at 27 °C after sintering at 1150 °C for 1 min and 1000 °C for 3 h. In addition, those fine-grained Ga-LLZO exhibit improved stability against molten Li. The Li/Ga-LLZO/Li symmetric cells show a critical current density of 0.7 mA cm −2 , and a stable cycling of over 600 h at 0.4 mA cm −2  at 27 °C. The Li/Ga-LLZO/LiFePO 4 full cells deliver reversible capacity of 150 mAh g −1 , showing negligible decay after 50 cycles. These results bring the Ga-LLZO electrolytes one step closer to practical application in solid-state batteries.

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Su J. et al. Overcoming the abnormal grain growth in Ga-doped Li7La3Zr2O12 to enhance the electrochemical stability against Li metal // Ceramics International. 2019. Vol. 45. No. 12. pp. 14991-14996.
GOST all authors (up to 50) Copy
Su J., Huang X., Song Z., Xiu T., Badding M. E., Jin J., Jin J., Wen Z., Wen Z. Overcoming the abnormal grain growth in Ga-doped Li7La3Zr2O12 to enhance the electrochemical stability against Li metal // Ceramics International. 2019. Vol. 45. No. 12. pp. 14991-14996.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1016/j.ceramint.2019.04.236
UR - https://doi.org/10.1016/j.ceramint.2019.04.236
TI - Overcoming the abnormal grain growth in Ga-doped Li7La3Zr2O12 to enhance the electrochemical stability against Li metal
T2 - Ceramics International
AU - Su, Jianmeng
AU - Huang, Xiao
AU - Song, Zhen
AU - Xiu, Tongping
AU - Badding, Michael E
AU - Jin, Jun
AU - Wen, Zhaoyin
AU - Jin, Jun
AU - Wen, Z.
PY - 2019
DA - 2019/08/01 00:00:00
PB - Elsevier
SP - 14991-14996
IS - 12
VL - 45
SN - 0272-8842
ER -
BibTex |
Cite this
BibTex Copy
@article{2019_Su,
author = {Jianmeng Su and Xiao Huang and Zhen Song and Tongping Xiu and Michael E Badding and Jun Jin and Zhaoyin Wen and Jun Jin and Z. Wen},
title = {Overcoming the abnormal grain growth in Ga-doped Li7La3Zr2O12 to enhance the electrochemical stability against Li metal},
journal = {Ceramics International},
year = {2019},
volume = {45},
publisher = {Elsevier},
month = {aug},
url = {https://doi.org/10.1016/j.ceramint.2019.04.236},
number = {12},
pages = {14991--14996},
doi = {10.1016/j.ceramint.2019.04.236}
}
MLA
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MLA Copy
Su, Jianmeng, et al. “Overcoming the abnormal grain growth in Ga-doped Li7La3Zr2O12 to enhance the electrochemical stability against Li metal.” Ceramics International, vol. 45, no. 12, Aug. 2019, pp. 14991-14996. https://doi.org/10.1016/j.ceramint.2019.04.236.
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