Journal of Power Sources, volume 254, pages 287-292
Local impedance spectroscopic and microstructural analyses of Al-in-diffused Li7La3Zr2O12
Publication type: Journal Article
Publication date: 2014-05-01
Journal:
Journal of Power Sources
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 9.2
ISSN: 03787753
Physical and Theoretical Chemistry
Electrical and Electronic Engineering
Energy Engineering and Power Technology
Renewable Energy, Sustainability and the Environment
Abstract
A cylindrical Li 7 La 3 Zr 2 O 12 specimen in contact with an Al 2 O 3 crucible is sintered and the effect of Al diffusion on the microstructure, phase composition, and Li-ion conductivity of Li 7 La 3 Zr 2 O 12 is investigated. The decrease in the Li-ion conductivity and Al concentration with increasing distance from the contact area with the Al 2 O 3 crucible is confirmed using spatially resolved local-impedance spectroscopy and compositional analysis. The region close to the Al 2 O 3 crucible shows abnormally large grains (size > 0.7 mm) within a matrix of fine grains (size: ∼10 μm), abundant intergranular liquid, the Li 7 La 3 Zr 2 O 12 phase mostly in cubic form, and a high Li-ion conductivity (8.5 × 10 −5 S cm −1 ). In contrast, the region far from the Al 2 O 3 crucible exhibits uniform fine grains (size: ∼10 μm), scarce intergranular liquid, the tetragonal form of the Li 7 La 3 Zr 2 O 12 phase, and a low Li-ion conductivity (1.1 × 10 −6 S cm −1 ). The incorporation of Al into the Li 7 La 3 Zr 2 O 12 lattice and the resulting increase in the number of Li-ion vacancies is suggested to be the main reason for the increase in the Li-ion conductivity. The origins of the abnormal grain growth induced by the diffusion of Al are discussed in relation to the atomic surface structures of Li 7 La 3 Zr 2 O 12 and the presence of intergranular liquid phase.
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1 publication, 2.94%
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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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Ahn J. H. et al. Local impedance spectroscopic and microstructural analyses of Al-in-diffused Li7La3Zr2O12 // Journal of Power Sources. 2014. Vol. 254. pp. 287-292.
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Ahn J. H., Park S., Lee J., Park Y., Lee J. Local impedance spectroscopic and microstructural analyses of Al-in-diffused Li7La3Zr2O12 // Journal of Power Sources. 2014. Vol. 254. pp. 287-292.
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TY - JOUR
DO - 10.1016/j.jpowsour.2013.12.115
UR - https://doi.org/10.1016/j.jpowsour.2013.12.115
TI - Local impedance spectroscopic and microstructural analyses of Al-in-diffused Li7La3Zr2O12
T2 - Journal of Power Sources
AU - Ahn, Jee Hyun
AU - Park, Seung-Young
AU - Lee, Jae-Myung
AU - Park, Youngsin
AU - Lee, Jong-Heun
PY - 2014
DA - 2014/05/01 00:00:00
PB - Elsevier
SP - 287-292
VL - 254
SN - 0378-7753
ER -
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@article{2014_Ahn,
author = {Jee Hyun Ahn and Seung-Young Park and Jae-Myung Lee and Youngsin Park and Jong-Heun Lee},
title = {Local impedance spectroscopic and microstructural analyses of Al-in-diffused Li7La3Zr2O12},
journal = {Journal of Power Sources},
year = {2014},
volume = {254},
publisher = {Elsevier},
month = {may},
url = {https://doi.org/10.1016/j.jpowsour.2013.12.115},
pages = {287--292},
doi = {10.1016/j.jpowsour.2013.12.115}
}