Ceramics International, volume 45, issue 16, pages 20954-20960
Pressureless sintering of Al-free Ta-doped lithium garnets Li7-xLa3Zr2-xTaxO12 and the degradation mechanism in humid air
Tianhang Zhang
1, 2
,
Timothy Daniel Christopher
3, 4
,
Saifang Huang
2
,
Y. Liu
5
,
Wei Gao
2
,
Tilo Sӧhnel
3, 4
,
Peng Cao
2, 6
3
4
Publication type: Journal Article
Publication date: 2019-11-01
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
In this work, pressureless sintering (PLS) method was used to prepare Li 7 La 3 Zr 2 O 12 based Al-free garnet electrolytes with the substitution of tantalum (Ta). A series of Ta-doped lithium garnets Li 7- x La 3 Zr 2- x Ta x O 12 (LLZTO, x = 0, 0.25, 0.5, 0.75 and 1.0) were prepared, and the effect of Ta on the structure, densification and ionic conductivity was investigated. Both relative density and ionic conductivity of the LLZTO pellets are dependent on the content of Ta substitution, with the maximum values being reached at x = 0.5. We also studied the stability and degradation mechanism of lithium garnets (Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 ) in humid air with relative humidity of above 70%. It is revealed that after exposure in the humid air for 4 weeks, a layer of LiOH∙H 2 O was observed on the grain boundaries, which lowered its ionic conductivity considerably. In comparison, the pellet stored in a desiccator had clear surface with negligible change in the ionic conductivity.
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- We do not take into account publications without a DOI.
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Zhang T. et al. Pressureless sintering of Al-free Ta-doped lithium garnets Li7-xLa3Zr2-xTaxO12 and the degradation mechanism in humid air // Ceramics International. 2019. Vol. 45. No. 16. pp. 20954-20960.
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Zhang T., Christopher T. D., Huang S., Liu Y., Gao W., Sӧhnel T., Cao P. Pressureless sintering of Al-free Ta-doped lithium garnets Li7-xLa3Zr2-xTaxO12 and the degradation mechanism in humid air // Ceramics International. 2019. Vol. 45. No. 16. pp. 20954-20960.
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TY - JOUR
DO - 10.1016/j.ceramint.2019.07.085
UR - https://doi.org/10.1016/j.ceramint.2019.07.085
TI - Pressureless sintering of Al-free Ta-doped lithium garnets Li7-xLa3Zr2-xTaxO12 and the degradation mechanism in humid air
T2 - Ceramics International
AU - Zhang, Tianhang
AU - Christopher, Timothy Daniel
AU - Huang, Saifang
AU - Liu, Y.
AU - Gao, Wei
AU - Sӧhnel, Tilo
AU - Cao, Peng
PY - 2019
DA - 2019/11/01 00:00:00
PB - Elsevier
SP - 20954-20960
IS - 16
VL - 45
SN - 0272-8842
ER -
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@article{2019_Zhang,
author = {Tianhang Zhang and Timothy Daniel Christopher and Saifang Huang and Y. Liu and Wei Gao and Tilo Sӧhnel and Peng Cao},
title = {Pressureless sintering of Al-free Ta-doped lithium garnets Li7-xLa3Zr2-xTaxO12 and the degradation mechanism in humid air},
journal = {Ceramics International},
year = {2019},
volume = {45},
publisher = {Elsevier},
month = {nov},
url = {https://doi.org/10.1016/j.ceramint.2019.07.085},
number = {16},
pages = {20954--20960},
doi = {10.1016/j.ceramint.2019.07.085}
}
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Zhang, Tianhang, et al. “Pressureless sintering of Al-free Ta-doped lithium garnets Li7-xLa3Zr2-xTaxO12 and the degradation mechanism in humid air.” Ceramics International, vol. 45, no. 16, Nov. 2019, pp. 20954-20960. https://doi.org/10.1016/j.ceramint.2019.07.085.